Merge commit '05fa4c89f20e9769db0e6c0b429cef2590771ace' as 'tcl8.6'

1 files changed, 7742 insertions, 0 deletions

diff --git a/tcl8.6/tests/chanio.test b/tcl8.6/tests/chanio.test
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+# -*- tcl -*-
+# Functionality covered: operation of all IO commands, and all procedures
+# defined in generic/tclIO.c.
+#
+# This file contains a collection of tests for one or more of the Tcl built-in
+# commands. Sourcing this file into Tcl runs the tests and generates output
+# for errors. No output means no errors were found.
+#
+# Copyright (c) 1991-1994 The Regents of the University of California.
+# Copyright (c) 1994-1997 Sun Microsystems, Inc.
+# Copyright (c) 1998-1999 by Scriptics Corporation.
+#
+# See the file "license.terms" for information on usage and redistribution of
+# this file, and for a DISCLAIMER OF ALL WARRANTIES.
+
+if {[lsearch [namespace children] ::tcltest] == -1} {
+    package require tcltest 2
+    namespace import -force ::tcltest::*
+}
+
+::tcltest::loadTestedCommands
+catch [list package require -exact Tcltest [info patchlevel]]
+
+testConstraint testbytestring [llength [info commands testbytestring]]
+
+namespace eval ::tcl::test::io {
+    namespace import ::tcltest::*
+
+    variable umaskValue
+    variable path
+    variable f
+    variable i
+    variable n
+    variable v
+    variable msg
+    variable expected
+
+    ::tcltest::loadTestedCommands
+    catch [list package require -exact Tcltest [info patchlevel]]
+    
+    testConstraint testchannel      [llength [info commands testchannel]]
+    testConstraint exec             [llength [info commands exec]]
+    testConstraint openpipe         1
+    testConstraint fileevent        [llength [info commands fileevent]]
+    testConstraint fcopy            [llength [info commands fcopy]]
+    testConstraint testfevent       [llength [info commands testfevent]]
+    testConstraint testchannelevent [llength [info commands testchannelevent]]
+    testConstraint testmainthread   [llength [info commands testmainthread]]
+    testConstraint thread [expr {0 == [catch {package require Thread 2.7-}]}]
+
+    # You need a *very* special environment to do some tests.  In particular,
+    # many file systems do not support large-files...
+    testConstraint largefileSupport [expr {$::tcl_platform(os) ne "Darwin"}]
+
+    # some tests can only be run is umask is 2 if "umask" cannot be run, the
+    # tests will be skipped.
+    set umaskValue 0
+    testConstraint umask [expr {![catch {set umaskValue [scan [exec /bin/sh -c umask] %o]}]}]
+
+    testConstraint makeFileInHome [expr {![file exists ~/_test_] && [file writable ~]}]
+
+    # set up a long data file for some of the following tests
+
+    set path(longfile) [makeFile {} longfile]
+    set f [open $path(longfile) w]
+    chan configure $f -eofchar {} -translation lf
+    for { set i 0 } { $i < 100 } { incr i} {
+	chan puts $f "#123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef
+\#123456789abcdef01
+\#"
+    }
+    chan close $f
+
+    set path(cat) [makeFile {
+	set f stdin
+	if {$argv != ""} {
+	    set f [open [lindex $argv 0]]
+	}
+	chan configure $f -encoding binary -translation lf -blocking 0 -eofchar \x1a
+	chan configure stdout -encoding binary -translation lf -buffering none
+	chan event $f readable "foo $f"
+	proc foo {f} {
+	    set x [chan read $f]
+	    catch {chan puts -nonewline $x}
+	    if {[chan eof $f]} {
+		chan close $f
+		exit 0
+	    }
+	}
+	vwait forever
+    } cat]
+
+    set thisScript [file join [pwd] [info script]]
+
+    proc contents {file} {
+	set f [open $file]
+	chan configure $f -translation binary
+	set a [chan read $f]
+	chan close $f
+	return $a
+    }
+
+    # Wrapper round butt-ugly pipe syntax
+    proc openpipe {{mode r+} args} {
+	open "|[list [interpreter] {*}$args]" $mode
+    }
+
+test chan-io-1.5 {Tcl_WriteChars: CheckChannelErrors} {emptyTest} {
+    # no test, need to cause an async error.
+} {}
+set path(test1) [makeFile {} test1]
+test chan-io-1.6 {Tcl_WriteChars: WriteBytes} {
+    set f [open $path(test1) w]
+    chan configure $f -encoding binary
+    chan puts -nonewline $f "a\u4e4d\0"
+    chan close $f
+    contents $path(test1)
+} "a\x4d\x00"
+test chan-io-1.7 {Tcl_WriteChars: WriteChars} {
+    set f [open $path(test1) w]
+    chan configure $f -encoding shiftjis
+    chan puts -nonewline $f "a\u4e4d\0"
+    chan close $f
+    contents $path(test1)
+} "a\x93\xe1\x00"
+set path(test2) [makeFile {} test2]
+test chan-io-1.8 {Tcl_WriteChars: WriteChars} {
+    # This test written for SF bug #506297.
+    #
+    # Executing this test without the fix for the referenced bug applied to
+    # tcl will cause tcl, more specifically WriteChars, to go into an infinite
+    # loop.
+    set f [open $path(test2) w] 
+    chan configure      $f -encoding iso2022-jp 
+    chan puts -nonewline $f [format %s%c [string repeat " " 4] 12399] 
+    chan close           $f 
+    contents $path(test2)
+} "    \x1b\$B\$O\x1b(B"
+test chan-io-1.9 {Tcl_WriteChars: WriteChars} {
+    # When closing a channel with an encoding that appends escape bytes, check
+    # for the case where the escape bytes overflow the current IO buffer. The
+    # bytes should be moved into a new buffer.
+    set data "1234567890 [format %c 12399]"
+    set sizes [list]
+    # With default buffer size
+    set f [open $path(test2) w]
+    chan configure      $f -encoding iso2022-jp
+    chan puts -nonewline $f $data
+    chan close           $f
+    lappend sizes [file size $path(test2)]
+    # With buffer size equal to the length of the data, the escape bytes would
+    # go into the next buffer.
+    set f [open $path(test2) w]
+    chan configure      $f -encoding iso2022-jp -buffersize 16
+    chan puts -nonewline $f $data
+    chan close           $f
+    lappend sizes [file size $path(test2)]
+    # With buffer size that is large enough to hold 1 byte of escaped data,
+    # but not all 3. This should not write the escape bytes to the first
+    # buffer and then again to the second buffer.
+    set f [open $path(test2) w]
+    chan configure      $f -encoding iso2022-jp -buffersize 17
+    chan puts -nonewline $f $data
+    chan close           $f
+    lappend sizes [file size $path(test2)]
+    # With buffer size that can hold 2 out of 3 bytes of escaped data.
+    set f [open $path(test2) w]
+    chan configure      $f -encoding iso2022-jp -buffersize 18
+    chan puts -nonewline $f $data
+    chan close           $f
+    lappend sizes [file size $path(test2)]
+    # With buffer size that can hold all the data and escape bytes.
+    set f [open $path(test2) w]
+    chan configure      $f -encoding iso2022-jp -buffersize 19
+    chan puts -nonewline $f $data
+    chan close           $f
+    lappend sizes [file size $path(test2)]
+} {19 19 19 19 19}
+
+test chan-io-2.1 {WriteBytes} {
+    # loop until all bytes are written
+    set f [open $path(test1) w]
+    chan configure $f  -encoding binary -buffersize 16 -translation crlf
+    chan puts $f "abcdefghijklmnopqrstuvwxyz"
+    chan close $f
+    contents $path(test1)
+} "abcdefghijklmnopqrstuvwxyz\r\n"
+test chan-io-2.2 {WriteBytes: savedLF > 0} {
+    # After flushing buffer, there was a \n left over from the last
+    # \n -> \r\n expansion.  It gets stuck at beginning of this buffer.
+    set f [open $path(test1) w]
+    chan configure $f -encoding binary -buffersize 16 -translation crlf
+    chan puts -nonewline $f "123456789012345\n12"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "123456789012345\r" "123456789012345\r\n12"]
+test chan-io-2.3 {WriteBytes: flush on line} -body {
+    # Tcl "line" buffering has weird behavior: if current buffer contains a
+    # \n, entire buffer gets flushed.  Logical behavior would be to flush only
+    # up to the \n.
+    set f [open $path(test1) w]
+    chan configure $f -encoding binary -buffering line -translation crlf
+    chan puts -nonewline $f "\n12"
+    contents $path(test1)
+} -cleanup {
+    chan close $f
+} -result "\r\n12"
+test chan-io-2.4 {WriteBytes: reset sawLF after each buffer} {
+    set f [open $path(test1) w]
+     chan configure $f -encoding binary -buffering line -translation lf \
+	     -buffersize 16
+    chan puts -nonewline $f "abcdefg\nhijklmnopqrstuvwxyz"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "abcdefg\nhijklmno" "abcdefg\nhijklmnopqrstuvwxyz"]
+
+test chan-io-3.1 {WriteChars: compatibility with WriteBytes} {
+    # loop until all bytes are written
+    set f [open $path(test1) w]
+    chan configure $f -encoding ascii -buffersize 16 -translation crlf
+    chan puts $f "abcdefghijklmnopqrstuvwxyz"
+    chan close $f
+    contents $path(test1)
+} "abcdefghijklmnopqrstuvwxyz\r\n"
+test chan-io-3.2 {WriteChars: compatibility with WriteBytes: savedLF > 0} {
+    # After flushing buffer, there was a \n left over from the last
+    # \n -> \r\n expansion.  It gets stuck at beginning of this buffer.
+    set f [open $path(test1) w]
+    chan configure $f -encoding ascii -buffersize 16 -translation crlf
+    chan puts -nonewline $f "123456789012345\n12"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "123456789012345\r" "123456789012345\r\n12"]
+test chan-io-3.3 {WriteChars: compatibility with WriteBytes: flush on line} -body {
+    # Tcl "line" buffering has weird behavior: if current buffer contains a
+    # \n, entire buffer gets flushed.  Logical behavior would be to flush only
+    # up to the \n.
+    set f [open $path(test1) w]
+    chan configure $f -encoding ascii -buffering line -translation crlf
+    chan puts -nonewline $f "\n12"
+    contents $path(test1)
+} -cleanup {
+    chan close $f
+} -result "\r\n12"
+test chan-io-3.4 {WriteChars: loop over stage buffer} {
+    # stage buffer maps to more than can be queued at once.
+    set f [open $path(test1) w]
+    chan configure $f -encoding jis0208 -buffersize 16 
+    chan puts -nonewline $f "\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "!)!)!)!)!)!)!)!)" "!)!)!)!)!)!)!)!)!)!)!)!)!)!)!)"]
+test chan-io-3.5 {WriteChars: saved != 0} {
+    # Bytes produced by UtfToExternal from end of last channel buffer had to
+    # be moved to beginning of next channel buffer to preserve requested
+    # buffersize.
+    set f [open $path(test1) w]
+    chan configure $f -encoding jis0208 -buffersize 17 
+    chan puts -nonewline $f "\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "!)!)!)!)!)!)!)!)!" "!)!)!)!)!)!)!)!)!)!)!)!)!)!)!)"]
+test chan-io-3.6 {WriteChars: (stageRead + dstWrote == 0)} {
+    # One incomplete UTF-8 character at end of staging buffer. Backup in src
+    # to the beginning of that UTF-8 character and try again.
+    #
+    # Translate the first 16 bytes, produce 14 bytes of output, 2 left over
+    # (first two bytes of \uff21 in UTF-8). Given those two bytes try
+    # translating them again, find that no bytes are read produced, and break
+    # to outer loop where those two bytes will have the remaining 4 bytes (the
+    # last byte of \uff21 plus the all of \uff22) appended.
+    set f [open $path(test1) w]
+    chan configure $f -encoding shiftjis -buffersize 16
+    chan puts -nonewline $f "12345678901234\uff21\uff22"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "12345678901234\x82\x60" "12345678901234\x82\x60\x82\x61"]
+test chan-io-3.7 {WriteChars: (bufPtr->nextAdded > bufPtr->length)} {
+    # When translating UTF-8 to external, the produced bytes went past end of
+    # the channel buffer. This is done on purpose - we then truncate the bytes
+    # at the end of the partial character to preserve the requested blocksize
+    # on flush. The truncated bytes are moved to the beginning of the next
+    # channel buffer.
+    set f [open $path(test1) w]
+    chan configure $f -encoding jis0208 -buffersize 17 
+    chan puts -nonewline $f "\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "!)!)!)!)!)!)!)!)!" "!)!)!)!)!)!)!)!)!)!)!)!)!)!)!)"]
+test chan-io-3.8 {WriteChars: reset sawLF after each buffer} {
+    set f [open $path(test1) w]
+    chan configure $f -encoding ascii -buffering line -translation lf \
+	     -buffersize 16
+    chan puts -nonewline $f "abcdefg\nhijklmnopqrstuvwxyz"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "abcdefg\nhijklmno" "abcdefg\nhijklmnopqrstuvwxyz"]
+
+test chan-io-4.1 {TranslateOutputEOL: lf} {
+    # search for \n
+    set f [open $path(test1) w]
+    chan configure $f -buffering line -translation lf
+    chan puts $f "abcde"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "abcde\n" "abcde\n"]
+test chan-io-4.2 {TranslateOutputEOL: cr} {
+    # search for \n, replace with \r
+    set f [open $path(test1) w]
+    chan configure $f -buffering line -translation cr
+    chan puts $f "abcde"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "abcde\r" "abcde\r"]
+test chan-io-4.3 {TranslateOutputEOL: crlf} {
+    # simple case: search for \n, replace with \r
+    set f [open $path(test1) w]
+    chan configure $f -buffering line -translation crlf
+    chan puts $f "abcde"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "abcde\r\n" "abcde\r\n"]
+test chan-io-4.4 {TranslateOutputEOL: crlf} {
+    # Keep storing more bytes in output buffer until output buffer is full. We
+    # have 13 bytes initially that would turn into 18 bytes. Fill dest buffer
+    # while (dstEnd < dstMax).
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf -buffersize 16
+    chan puts -nonewline $f "1234567\n\n\n\n\nA"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "1234567\r\n\r\n\r\n\r\n\r" "1234567\r\n\r\n\r\n\r\n\r\nA"]
+test chan-io-4.5 {TranslateOutputEOL: crlf} {
+    # Check for overflow of the destination buffer
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf -buffersize 12
+    chan puts -nonewline $f "12345678901\n456789012345678901234"
+    chan close $f
+    set x [contents $path(test1)]
+} "12345678901\r\n456789012345678901234"
+
+test chan-io-5.1 {CheckFlush: not full} {
+    set f [open $path(test1) w]
+    chan configure $f 
+    chan puts -nonewline $f "12345678901234567890"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "" "12345678901234567890"]
+test chan-io-5.2 {CheckFlush: full} {
+    set f [open $path(test1) w]
+    chan configure $f -buffersize 16
+    chan puts -nonewline $f "12345678901234567890"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "1234567890123456" "12345678901234567890"]
+test chan-io-5.3 {CheckFlush: not line} {
+    set f [open $path(test1) w]
+    chan configure $f -buffering line
+    chan puts -nonewline $f "12345678901234567890"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "" "12345678901234567890"]
+test chan-io-5.4 {CheckFlush: line} {
+    set f [open $path(test1) w]
+    chan configure $f -buffering line -translation lf -encoding ascii
+    chan puts -nonewline $f "1234567890\n1234567890"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "1234567890\n1234567890" "1234567890\n1234567890"]
+test chan-io-5.5 {CheckFlush: none} {
+    set f [open $path(test1) w]
+    chan configure $f -buffering none
+    chan puts -nonewline $f "1234567890"
+    set x [list [contents $path(test1)]]
+    chan close $f
+    lappend x [contents $path(test1)]
+} [list "1234567890" "1234567890"]
+
+test chan-io-6.1 {Tcl_GetsObj: working} -body {
+    set f [open $path(test1) w]
+    chan puts $f "foo\nboo"
+    chan close $f
+    set f [open $path(test1)]
+    chan gets $f
+} -cleanup {
+    chan close $f
+} -result {foo}
+test chan-io-6.2 {Tcl_GetsObj: CheckChannelErrors() != 0} emptyTest {
+    # no test, need to cause an async error.
+} {}
+test chan-io-6.3 {Tcl_GetsObj: how many have we used?} -body {
+    # if (bufPtr != NULL) {oldRemoved = bufPtr->nextRemoved}
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts $f "abc\ndefg"
+    chan close $f
+    set f [open $path(test1)]
+    list [chan tell $f] [chan gets $f line] [chan tell $f] [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {0 3 5 4 defg}
+test chan-io-6.4 {Tcl_GetsObj: encoding == NULL} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation binary
+    chan puts $f "\x81\u1234\0"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation binary
+    list [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 3 "\x81\x34\x00"]
+test chan-io-6.5 {Tcl_GetsObj: encoding != NULL} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation binary
+    chan puts $f "\x88\xea\x92\x9a"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -encoding shiftjis
+    list [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 2 "\u4e00\u4e01"]
+set a "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
+append a $a
+append a $a
+test chan-io-6.6 {Tcl_GetsObj: loop test} -body {
+    # if (dst >= dstEnd) 
+    set f [open $path(test1) w]
+    chan puts $f $a
+    chan puts $f hi
+    chan close $f
+    set f [open $path(test1)]
+    list [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 256 $a]
+test chan-io-6.7 {Tcl_GetsObj: error in input} -constraints {stdio openpipe} -body {
+    # if (FilterInputBytes(chanPtr, &gs) != 0)
+    set f [openpipe w+ $path(cat)]
+    chan puts -nonewline $f "hi\nwould"
+    chan flush $f
+    chan gets $f
+    chan configure $f -blocking 0
+    chan gets $f line
+} -cleanup {
+    chan close $f
+} -result {-1}
+test chan-io-6.8 {Tcl_GetsObj: remember if EOF is seen} -body {
+    set f [open $path(test1) w]
+    chan puts $f "abcdef\x1aghijk\nwombat"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -eofchar \x1a
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {6 abcdef -1 {}}
+test chan-io-6.9 {Tcl_GetsObj: remember if EOF is seen} -body {
+    set f [open $path(test1) w]
+    chan puts $f "abcdefghijk\nwom\u001abat"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -eofchar \x1a
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {11 abcdefghijk 3 wom}
+# Comprehensive tests
+test chan-io-6.10 {Tcl_GetsObj: lf mode: no chars} -body {
+    set f [open $path(test1) w]
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation lf
+    list [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {-1 {}}
+test chan-io-6.11 {Tcl_GetsObj: lf mode: lone \n} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\n"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation lf
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {0 {} -1 {}}
+test chan-io-6.12 {Tcl_GetsObj: lf mode: lone \r} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation lf
+    set x [list [chan gets $f line] $line [chan gets $f line] $line]
+} -cleanup {
+    chan close $f
+} -result [list 1 "\r" -1 ""]
+test chan-io-6.13 {Tcl_GetsObj: lf mode: 1 char} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f a
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation lf
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {1 a -1 {}}
+test chan-io-6.14 {Tcl_GetsObj: lf mode: 1 char followed by EOL} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "a\n"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation lf
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {1 a -1 {}}
+test chan-io-6.15 {Tcl_GetsObj: lf mode: several chars} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\nefgh\rijkl\r\nmnop"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation lf
+    list [chan gets $f line] $line [chan gets $f line] $line \
+	[chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 4 "abcd" 10 "efgh\rijkl\r" 4 "mnop" -1 ""]
+test chan-io-6.16 {Tcl_GetsObj: cr mode: no chars} -body {
+    set f [open $path(test1) w]
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation cr
+    list [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {-1 {}}
+test chan-io-6.17 {Tcl_GetsObj: cr mode: lone \n} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\n"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation cr
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 1 "\n" -1 ""]
+test chan-io-6.18 {Tcl_GetsObj: cr mode: lone \r} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation cr
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {0 {} -1 {}}
+test chan-io-6.19 {Tcl_GetsObj: cr mode: 1 char} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f a
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation cr
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {1 a -1 {}}
+test chan-io-6.20 {Tcl_GetsObj: cr mode: 1 char followed by EOL} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "a\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation cr
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {1 a -1 {}}
+test chan-io-6.21 {Tcl_GetsObj: cr mode: several chars} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\nefgh\rijkl\r\nmnop"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation cr
+    list [chan gets $f line] $line [chan gets $f line] $line [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 9 "abcd\nefgh" 4 "ijkl" 5 "\nmnop" -1 ""]
+test chan-io-6.22 {Tcl_GetsObj: crlf mode: no chars} -body {
+    set f [open $path(test1) w]
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    list [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {-1 {}}
+test chan-io-6.23 {Tcl_GetsObj: crlf mode: lone \n} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\n"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 1 "\n" -1 ""]
+test chan-io-6.24 {Tcl_GetsObj: crlf mode: lone \r} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 1 "\r" -1 ""]
+test chan-io-6.25 {Tcl_GetsObj: crlf mode: \r\r} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\r\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 2 "\r\r" -1 ""]
+test chan-io-6.26 {Tcl_GetsObj: crlf mode: \r\n} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\r\n"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {0 {} -1 {}}
+test chan-io-6.27 {Tcl_GetsObj: crlf mode: 1 char} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f a
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {1 a -1 {}}
+test chan-io-6.28 {Tcl_GetsObj: crlf mode: 1 char followed by EOL} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "a\r\n"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {1 a -1 {}}
+test chan-io-6.29 {Tcl_GetsObj: crlf mode: several chars} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\nefgh\rijkl\r\nmnop"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    list [chan gets $f line] $line [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 14 "abcd\nefgh\rijkl" 4 "mnop" -1 ""]
+test chan-io-6.30 {Tcl_GetsObj: crlf mode: buffer exhausted} -constraints {testchannel} -body {
+    # if (eol >= dstEnd)
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "123456789012345\r\nabcdefghijklmnoprstuvwxyz"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf -buffersize 16
+    list [chan gets $f line] $line [testchannel inputbuffered $f]
+} -cleanup {
+    chan close $f
+} -result [list 15 "123456789012345" 15]
+test chan-io-6.31 {Tcl_GetsObj: crlf mode: buffer exhausted, blocked} -setup {
+    set x ""
+} -constraints {stdio testchannel openpipe fileevent} -body {
+    # (FilterInputBytes() != 0)
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -translation {crlf lf} -buffering none
+    chan puts -nonewline $f "bbbbbbbbbbbbbb\r\n123456789012345\r"
+    chan configure $f -buffersize 16
+    lappend x [chan gets $f]
+    chan configure $f -blocking 0
+    lappend x [chan gets $f line] $line [chan blocked $f] \
+	[testchannel inputbuffered $f]
+} -cleanup {
+    chan close $f
+} -result {bbbbbbbbbbbbbb -1 {} 1 16}
+test chan-io-6.32 {Tcl_GetsObj: crlf mode: buffer exhausted, more data} -constraints {testchannel} -body {
+    # not (FilterInputBytes() != 0)
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "123456789012345\r\n123"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf -buffersize 16
+    list [chan gets $f line] $line [chan tell $f] [testchannel inputbuffered $f]
+} -cleanup {
+    chan close $f
+} -result {15 123456789012345 17 3}
+test chan-io-6.33 {Tcl_GetsObj: crlf mode: buffer exhausted, at eof} -body {
+    # eol still equals dstEnd
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "123456789012345\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf -buffersize 16
+    list [chan gets $f line] $line [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result [list 16 "123456789012345\r" 1]
+test chan-io-6.34 {Tcl_GetsObj: crlf mode: buffer exhausted, not followed by \n} -body {
+    # not (*eol == '\n') 
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "123456789012345\rabcd\r\nefg"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf -buffersize 16
+    list [chan gets $f line] $line [chan tell $f]
+} -cleanup {
+    chan close $f
+} -result [list 20 "123456789012345\rabcd" 22]
+test chan-io-6.35 {Tcl_GetsObj: auto mode: no chars} -body {
+    set f [open $path(test1) w]
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    list [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {-1 {}}
+test chan-io-6.36 {Tcl_GetsObj: auto mode: lone \n} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\n"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {0 {} -1 {}}
+test chan-io-6.37 {Tcl_GetsObj: auto mode: lone \r} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {0 {} -1 {}}
+test chan-io-6.38 {Tcl_GetsObj: auto mode: \r\r} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\r\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    list [chan gets $f line] $line [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {0 {} 0 {} -1 {}}
+test chan-io-6.39 {Tcl_GetsObj: auto mode: \r\n} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\r\n"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {0 {} -1 {}}
+test chan-io-6.40 {Tcl_GetsObj: auto mode: 1 char} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f a
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {1 a -1 {}}
+test chan-io-6.41 {Tcl_GetsObj: auto mode: 1 char followed by EOL} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "a\r\n"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    list [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {1 a -1 {}}
+test chan-io-6.42 {Tcl_GetsObj: auto mode: several chars} -setup {
+    set x ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\nefgh\rijkl\r\nmnop"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    lappend x [chan gets $f line] $line [chan gets $f line] $line
+    lappend x [chan gets $f line] $line [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {4 abcd 4 efgh 4 ijkl 4 mnop -1 {}}
+test chan-io-6.43 {Tcl_GetsObj: input saw cr} -setup {
+    set x ""
+} -constraints {stdio testchannel openpipe fileevent} -body {
+    # if (chanPtr->flags & INPUT_SAW_CR)
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -translation {auto lf} -buffering none
+    chan puts -nonewline $f "bbbbbbbbbbbbbbb\n123456789abcdef\r"
+    chan configure $f -buffersize 16
+    lappend x [chan gets $f]
+    chan configure $f -blocking 0
+    lappend x [chan gets $f line] $line [testchannel queuedcr $f] 
+    chan configure $f -blocking 1
+    chan puts -nonewline $f "\nabcd\refg\x1a"
+    lappend x [chan gets $f line] $line [testchannel queuedcr $f]
+    lappend x [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {bbbbbbbbbbbbbbb 15 123456789abcdef 1 4 abcd 0 3 efg}
+test chan-io-6.44 {Tcl_GetsObj: input saw cr, not followed by cr} -setup {
+    set x ""
+} -constraints {stdio testchannel openpipe fileevent} -body {
+    # not (*eol == '\n') 
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -translation {auto lf} -buffering none
+    chan puts -nonewline $f "bbbbbbbbbbbbbbb\n123456789abcdef\r"
+    chan configure $f -buffersize 16
+    lappend x [chan gets $f]
+    chan configure $f -blocking 0
+    lappend x [chan gets $f line] $line [testchannel queuedcr $f] 
+    chan configure $f -blocking 1
+    chan puts -nonewline $f "abcd\refg\x1a"
+    lappend x [chan gets $f line] $line [testchannel queuedcr $f]
+    lappend x [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {bbbbbbbbbbbbbbb 15 123456789abcdef 1 4 abcd 0 3 efg}
+test chan-io-6.45 {Tcl_GetsObj: input saw cr, skip right number of bytes} -setup {
+    set x ""
+} -constraints {stdio testchannel openpipe fileevent} -body {
+    # Tcl_ExternalToUtf()
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -translation {auto lf} -buffering none
+    chan configure $f -encoding unicode
+    chan puts -nonewline $f "bbbbbbbbbbbbbbb\n123456789abcdef\r"
+    chan configure $f -buffersize 16
+    chan gets $f
+    chan configure $f -blocking 0
+    lappend x [chan gets $f line] $line [testchannel queuedcr $f]
+    chan configure $f -blocking 1
+    chan puts -nonewline $f "\nabcd\refg"
+    lappend x [chan gets $f line] $line [testchannel queuedcr $f]
+} -cleanup {
+    chan close $f
+} -result {15 123456789abcdef 1 4 abcd 0}
+test chan-io-6.46 {Tcl_GetsObj: input saw cr, followed by just \n should give eof} -setup {
+    set x ""
+} -constraints {stdio testchannel openpipe fileevent} -body {
+    # memmove()
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -translation {auto lf} -buffering none
+    chan puts -nonewline $f "bbbbbbbbbbbbbbb\n123456789abcdef\r"
+    chan configure $f -buffersize 16
+    chan gets $f
+    chan configure $f -blocking 0
+    lappend x [chan gets $f line] $line [testchannel queuedcr $f]
+    chan configure $f -blocking 1
+    chan puts -nonewline $f "\n\x1a"
+    lappend x [chan gets $f line] $line [testchannel queuedcr $f]
+} -cleanup {
+    chan close $f
+} -result {15 123456789abcdef 1 -1 {} 0}
+test chan-io-6.47 {Tcl_GetsObj: auto mode: \r at end of buffer, peek for \n} -constraints {testchannel} -body {
+    # (eol == dstEnd)
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "123456789012345\r\nabcdefghijklmnopq"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto -buffersize 16
+    list [chan gets $f] [testchannel inputbuffered $f]
+} -cleanup {
+    chan close $f
+} -result {123456789012345 15}
+test chan-io-6.48 {Tcl_GetsObj: auto mode: \r at end of buffer, no more avail} -constraints {testchannel} -body {
+    # PeekAhead() did not get any, so (eol >= dstEnd)
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "123456789012345\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto -buffersize 16
+    list [chan gets $f] [testchannel queuedcr $f]
+} -cleanup {
+    chan close $f
+} -result {123456789012345 1}
+test chan-io-6.49 {Tcl_GetsObj: auto mode: \r followed by \n} -constraints {testchannel} -body {
+    # if (*eol == '\n') {skip++}
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "123456\r\n78901"
+    chan close $f
+    set f [open $path(test1)]
+    list [chan gets $f] [testchannel queuedcr $f] [chan tell $f] [chan gets $f]
+} -cleanup {
+    chan close $f
+} -result {123456 0 8 78901}
+test chan-io-6.50 {Tcl_GetsObj: auto mode: \r not followed by \n} -constraints {testchannel} -body {
+    # not (*eol == '\n') 
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "123456\r78901"
+    chan close $f
+    set f [open $path(test1)]
+    list [chan gets $f] [testchannel queuedcr $f] [chan tell $f] [chan gets $f]
+} -cleanup {
+    chan close $f
+} -result {123456 0 7 78901}
+test chan-io-6.51 {Tcl_GetsObj: auto mode: \n} -body {
+    # else if (*eol == '\n') {goto gotoeol;}
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "123456\n78901"
+    chan close $f
+    set f [open $path(test1)]
+    list [chan gets $f] [chan tell $f] [chan gets $f]
+} -cleanup {
+    chan close $f
+} -result {123456 7 78901}
+test chan-io-6.52 {Tcl_GetsObj: saw EOF character} -constraints {testchannel} -body {
+    # if (eof != NULL)
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "123456\x1ak9012345\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -eofchar \x1a
+    list [chan gets $f] [testchannel queuedcr $f] [chan tell $f] [chan gets $f]
+} -cleanup {
+    chan close $f
+} -result {123456 0 6 {}}
+test chan-io-6.53 {Tcl_GetsObj: device EOF} -body {
+    # didn't produce any bytes
+    set f [open $path(test1) w]
+    chan close $f
+    set f [open $path(test1)]
+    list [chan gets $f line] $line [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {-1 {} 1}
+test chan-io-6.54 {Tcl_GetsObj: device EOF} -body {
+    # got some bytes before EOF.
+    set f [open $path(test1) w]
+    chan puts -nonewline $f abc
+    chan close $f
+    set f [open $path(test1)]
+    list [chan gets $f line] $line [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {3 abc 1}
+test chan-io-6.55 {Tcl_GetsObj: overconverted} -body {
+    # Tcl_ExternalToUtf(), make sure state updated
+    set f [open $path(test1) w]
+    chan configure $f -encoding iso2022-jp
+    chan puts $f "there\u4e00ok\n\u4e01more bytes\nhere"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -encoding iso2022-jp
+    list [chan gets $f line] $line [chan gets $f line] $line [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 8 "there\u4e00ok" 11 "\u4e01more bytes" 4 "here"]
+test chan-io-6.56 {Tcl_GetsObj: incomplete lines should disable file events} -setup {
+    update
+    variable x {}
+} -constraints {stdio openpipe fileevent} -body {
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -buffering none
+    chan puts -nonewline $f "foobar"
+    chan configure $f -blocking 0
+    after 500 [namespace code {
+	lappend x timeout
+    }]
+    chan event $f readable [namespace code {
+	lappend x [chan gets $f]
+    }]
+    vwait [namespace which -variable x]
+    vwait [namespace which -variable x]
+    chan configure $f -blocking 1
+    chan puts -nonewline $f "baz\n"
+    after 500 [namespace code {
+	lappend x timeout
+    }]
+    chan configure $f -blocking 0
+    vwait [namespace which -variable x]
+    vwait [namespace which -variable x]
+    return $x
+} -cleanup {
+    chan close $f
+} -result {{} timeout foobarbaz timeout}
+
+test chan-io-7.1 {FilterInputBytes: split up character at end of buffer} -body {
+    # (result == TCL_CONVERT_MULTIBYTE)
+    set f [open $path(test1) w]
+    chan configure $f -encoding shiftjis
+    chan puts $f "1234567890123\uff10\uff11\uff12\uff13\uff14\nend"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -encoding shiftjis -buffersize 16
+    chan gets $f
+} -cleanup {
+    chan close $f
+} -result "1234567890123\uff10\uff11\uff12\uff13\uff14"
+test chan-io-7.2 {FilterInputBytes: split up character in middle of buffer} -body {
+    # (bufPtr->nextAdded < bufPtr->bufLength)
+    set f [open $path(test1) w]
+    chan configure $f -encoding binary
+    chan puts -nonewline $f "1234567890\n123\x82\x4f\x82\x50\x82"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -encoding shiftjis
+    list [chan gets $f line] $line [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {10 1234567890 0}
+test chan-io-7.3 {FilterInputBytes: split up character at EOF} -setup {
+    set x ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    chan configure $f -encoding binary
+    chan puts -nonewline $f "1234567890123\x82\x4f\x82\x50\x82"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -encoding shiftjis
+    lappend x [chan gets $f line] $line
+    lappend x [chan tell $f] [testchannel inputbuffered $f] [chan eof $f]
+    lappend x [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result [list 15 "1234567890123\uff10\uff11" 18 0 1 -1 ""]
+test chan-io-7.4 {FilterInputBytes: recover from split up character} -setup {
+    variable x ""
+} -constraints {stdio openpipe fileevent} -body {
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -encoding binary -buffering none
+    chan puts -nonewline $f "1234567890123\x82\x4f\x82\x50\x82"
+    chan configure $f -encoding shiftjis -blocking 0
+    chan event $f read [namespace code {
+	lappend x [chan gets $f line] $line [chan blocked $f]
+    }]
+    vwait [namespace which -variable x]
+    chan configure $f -encoding binary -blocking 1
+    chan puts $f "\x51\x82\x52"
+    chan configure $f -encoding shiftjis
+    vwait [namespace which -variable x]
+    return $x
+} -cleanup {
+    chan close $f
+} -result [list -1 "" 1 17 "1234567890123\uff10\uff11\uff12\uff13" 0]
+
+test chan-io-8.1 {PeekAhead: only go to device if no more cached data} -constraints {testchannel} -body {
+    # (bufPtr->nextPtr == NULL)
+    set f [open $path(test1) w]
+    chan configure $f -encoding ascii -translation lf
+    chan puts -nonewline $f "123456789012345\r\n2345678"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -encoding ascii -translation auto -buffersize 16
+    # here
+    chan gets $f
+    testchannel inputbuffered $f
+} -cleanup {
+    chan close $f
+} -result 7
+test chan-io-8.2 {PeekAhead: only go to device if no more cached data} -setup {
+    variable x {}
+} -constraints {stdio testchannel openpipe fileevent} -body {
+    # not (bufPtr->nextPtr == NULL)
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -translation lf -encoding ascii -buffering none
+    chan puts -nonewline $f "123456789012345\r\nbcdefghijklmnopqrstuvwxyz"
+    chan event $f read [namespace code {
+	lappend x [chan gets $f line] $line [testchannel inputbuffered $f]
+    }]
+    chan configure $f -encoding unicode -buffersize 16 -blocking 0
+    vwait [namespace which -variable x]
+    chan configure $f -translation auto -encoding ascii -blocking 1
+    # here
+    vwait [namespace which -variable x]
+    return $x
+} -cleanup {
+    chan close $f
+} -result {-1 {} 42 15 123456789012345 25}
+test chan-io-8.3 {PeekAhead: no cached data available} -constraints {stdio testchannel openpipe fileevent} -body {
+    # (bytesLeft == 0)
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -translation {auto binary}
+    chan puts -nonewline $f "abcdefghijklmno\r"
+    chan flush $f
+    list [chan gets $f line] $line [testchannel queuedcr $f]
+} -cleanup {
+    chan close $f
+} -result {15 abcdefghijklmno 1}
+set a "123456789012345678901234567890"
+append a "123456789012345678901234567890"
+append a "1234567890123456789012345678901"
+test chan-io-8.4 {PeekAhead: cached data available in this buffer} -body {
+    # not (bytesLeft == 0)
+    set f [open $path(test1) w+]
+    chan configure $f -translation binary
+    chan puts $f "${a}\r\nabcdef"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -encoding binary -translation auto
+    # "${a}\r" was converted in one operation (because ENCODING_LINESIZE is
+    # 30). To check if "\n" follows, calls PeekAhead and determines that
+    # cached data is available in buffer w/o having to call driver.
+    chan gets $f
+} -cleanup {
+    chan close $f
+} -result $a
+unset a
+test chan-io-8.5 {PeekAhead: don't peek if last read was short} -constraints {stdio testchannel openpipe fileevent} -body {
+    # (bufPtr->nextAdded < bufPtr->length)
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -translation {auto binary}
+    chan puts -nonewline $f "abcdefghijklmno\r"
+    chan flush $f
+    # here
+    list [chan gets $f line] $line [testchannel queuedcr $f]
+} -cleanup {
+    chan close $f
+} -result {15 abcdefghijklmno 1}
+test chan-io-8.6 {PeekAhead: change to non-blocking mode} -constraints {stdio testchannel openpipe fileevent} -body {
+    # ((chanPtr->flags & CHANNEL_NONBLOCKING) == 0) 
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -translation {auto binary} -buffersize 16
+    chan puts -nonewline $f "abcdefghijklmno\r"
+    chan flush $f
+    # here
+    list [chan gets $f line] $line [testchannel queuedcr $f]
+} -cleanup {
+    chan close $f
+} -result {15 abcdefghijklmno 1}
+test chan-io-8.7 {PeekAhead: cleanup} -setup {
+    set x ""
+} -constraints {stdio testchannel openpipe fileevent} -body {
+    # Make sure bytes are removed from buffer.
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -translation {auto binary} -buffering none
+    chan puts -nonewline $f "abcdefghijklmno\r"
+    # here
+    lappend x [chan gets $f line] $line [testchannel queuedcr $f]
+    chan puts -nonewline $f "\x1a"
+    lappend x [chan gets $f line] $line
+} -cleanup {
+    chan close $f
+} -result {15 abcdefghijklmno 1 -1 {}}
+
+test chan-io-9.1 {CommonGetsCleanup} emptyTest {
+} {}
+
+test chan-io-10.1 {Tcl_ReadChars: CheckChannelErrors} emptyTest {
+    # no test, need to cause an async error.
+} {}
+test chan-io-10.2 {Tcl_ReadChars: loop until enough copied} -body {
+    # one time
+    # for (copied = 0; (unsigned) toRead > 0; )
+    set f [open $path(test1) w]
+    chan puts $f abcdefghijklmnop
+    chan close $f
+    set f [open $path(test1)]
+    chan read $f 5
+} -cleanup {
+    chan close $f
+} -result {abcde}
+test chan-io-10.3 {Tcl_ReadChars: loop until enough copied} -body {
+    # multiple times
+    # for (copied = 0; (unsigned) toRead > 0; )
+    set f [open $path(test1) w]
+    chan puts $f abcdefghijklmnopqrstuvwxyz
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -buffersize 16
+    # here
+    chan read $f 19
+} -cleanup {
+    chan close $f
+} -result {abcdefghijklmnopqrs}
+test chan-io-10.4 {Tcl_ReadChars: no more in channel buffer} -body {
+    # (copiedNow < 0)
+    set f [open $path(test1) w]
+    chan puts -nonewline $f abcdefghijkl
+    chan close $f
+    set f [open $path(test1)]
+    # here
+    chan read $f 1000
+} -cleanup {
+    chan close $f
+} -result {abcdefghijkl}
+test chan-io-10.5 {Tcl_ReadChars: stop on EOF} -body {
+    # (chanPtr->flags & CHANNEL_EOF)
+    set f [open $path(test1) w]
+    chan puts -nonewline $f abcdefghijkl
+    chan close $f
+    set f [open $path(test1)]
+    # here
+    chan read $f 1000
+} -cleanup {
+    chan close $f
+} -result {abcdefghijkl}
+
+test chan-io-11.1 {ReadBytes: want to read a lot} -body {
+    # ((unsigned) toRead > (unsigned) srcLen)
+    set f [open $path(test1) w]
+    chan puts -nonewline $f abcdefghijkl
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -encoding binary
+    # here
+    chan read $f 1000
+} -cleanup {
+    chan close $f
+} -result {abcdefghijkl}
+test chan-io-11.2 {ReadBytes: want to read all} -body {
+    # ((unsigned) toRead > (unsigned) srcLen)
+    set f [open $path(test1) w]
+    chan puts -nonewline $f abcdefghijkl
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -encoding binary
+    # here
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result {abcdefghijkl}
+test chan-io-11.3 {ReadBytes: allocate more space} -body {
+    # (toRead > length - offset - 1)
+    set f [open $path(test1) w]
+    chan puts -nonewline $f abcdefghijklmnopqrstuvwxyz
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -buffersize 16 -encoding binary
+    # here
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result {abcdefghijklmnopqrstuvwxyz}
+test chan-io-11.4 {ReadBytes: EOF char found} -body {
+    # (TranslateInputEOL() != 0)
+    set f [open $path(test1) w]
+    chan puts $f abcdefghijklmnopqrstuvwxyz
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -eofchar m -encoding binary
+    # here
+    list [chan read $f] [chan eof $f] [chan read $f] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {abcdefghijkl 1 {} 1}
+
+test chan-io-12.1 {ReadChars: want to read a lot} -body {
+    # ((unsigned) toRead > (unsigned) srcLen)
+    set f [open $path(test1) w]
+    chan puts -nonewline $f abcdefghijkl
+    chan close $f
+    set f [open $path(test1)]
+    # here
+    chan read $f 1000
+} -cleanup {
+    chan close $f
+} -result {abcdefghijkl}
+test chan-io-12.2 {ReadChars: want to read all} -body {
+    # ((unsigned) toRead > (unsigned) srcLen)
+    set f [open $path(test1) w]
+    chan puts -nonewline $f abcdefghijkl
+    chan close $f
+    set f [open $path(test1)]
+    # here
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result {abcdefghijkl}
+test chan-io-12.3 {ReadChars: allocate more space} -body {
+    # (toRead > length - offset - 1)
+    set f [open $path(test1) w]
+    chan puts -nonewline $f abcdefghijklmnopqrstuvwxyz
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -buffersize 16
+    # here
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result {abcdefghijklmnopqrstuvwxyz}
+test chan-io-12.4 {ReadChars: split-up char} -setup {
+    variable x {}
+} -constraints {stdio testchannel openpipe fileevent} -body {
+    # (srcRead == 0)
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -encoding binary -buffering none -buffersize 16
+    chan puts -nonewline $f "123456789012345\x96"
+    chan configure $f -encoding shiftjis -blocking 0
+    chan event $f read [namespace code {
+	lappend x [chan read $f] [testchannel inputbuffered $f]
+    }]
+    chan configure $f -encoding shiftjis
+    vwait [namespace which -variable x]
+    chan configure $f -encoding binary -blocking 1
+    chan puts -nonewline $f "\x7b"
+    after 500			;# Give the cat process time to catch up
+    chan configure $f -encoding shiftjis -blocking 0
+    vwait [namespace which -variable x]
+    return $x
+} -cleanup {
+    chan close $f
+} -result [list "123456789012345" 1 "\u672c" 0]
+test chan-io-12.5 {ReadChars: chan events on partial characters} -setup {
+    variable x {}
+} -constraints {stdio openpipe fileevent} -body {
+    set path(test1) [makeFile {
+	chan configure stdout -encoding binary -buffering none
+	chan gets stdin; chan puts -nonewline "\xe7"
+	chan gets stdin; chan puts -nonewline "\x89"
+	chan gets stdin; chan puts -nonewline "\xa6"
+    } test1]
+    set f [openpipe r+ $path(test1)]
+    chan event $f readable [namespace code {
+	lappend x [chan read $f]
+	if {[chan eof $f]} {
+	    lappend x eof
+	}
+    }]
+    chan puts $f "go1"
+    chan flush $f
+    chan configure $f -blocking 0 -encoding utf-8
+    vwait [namespace which -variable x]
+    after 500 [namespace code { lappend x timeout }]
+    vwait [namespace which -variable x]
+    chan puts $f "go2"
+    chan flush $f
+    vwait [namespace which -variable x]
+    after 500 [namespace code { lappend x timeout }]
+    vwait [namespace which -variable x]
+    chan puts $f "go3"
+    chan flush $f
+    vwait [namespace which -variable x]
+    vwait [namespace which -variable x]
+    lappend x [catch {chan close $f} msg] $msg
+} -result "{} timeout {} timeout \u7266 {} eof 0 {}"
+
+test chan-io-13.1 {TranslateInputEOL: cr mode} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\rdef\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation cr
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "abcd\ndef\n"
+test chan-io-13.2 {TranslateInputEOL: crlf mode} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\r\ndef\r\n"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "abcd\ndef\n"
+test chan-io-13.3 {TranslateInputEOL: crlf mode: naked cr} -body {
+    # (src >= srcMax) 
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\r\ndef\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "abcd\ndef\r"
+test chan-io-13.4 {TranslateInputEOL: crlf mode: cr followed by not \n} -body {
+    # (src >= srcMax) 
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\r\ndef\rfgh"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "abcd\ndef\rfgh"
+test chan-io-13.5 {TranslateInputEOL: crlf mode: naked lf} -body {
+    # (src >= srcMax) 
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\r\ndef\nfgh"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation crlf
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "abcd\ndef\nfgh"
+test chan-io-13.6 {TranslateInputEOL: auto mode: saw cr in last segment} -setup {
+    variable x {}
+    variable y {}
+} -constraints {stdio testchannel openpipe fileevent} -body {
+    # (chanPtr->flags & INPUT_SAW_CR)
+    # This test may fail on slower machines.
+    set f [openpipe w+ $path(cat)]
+    chan configure $f -blocking 0 -buffering none -translation {auto lf}
+    chan event $f read [namespace code {
+	lappend x [chan read $f] [testchannel queuedcr $f]
+    }]
+    chan puts -nonewline $f "abcdefghj\r"
+    after 500 [namespace code {set y ok}]
+    vwait [namespace which -variable y]
+    chan puts -nonewline $f "\n01234"
+    after 500 [namespace code {set y ok}]
+    vwait [namespace which -variable y]
+    return $x
+} -cleanup {
+    chan close $f
+} -result [list "abcdefghj\n" 1 "01234" 0]
+test chan-io-13.7 {TranslateInputEOL: auto mode: naked \r} -constraints {testchannel openpipe} -body {
+    # (src >= srcMax)
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\r"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    list [chan read $f] [testchannel queuedcr $f]
+} -cleanup {
+    chan close $f
+} -result [list "abcd\n" 1]
+test chan-io-13.8 {TranslateInputEOL: auto mode: \r\n} -body {
+    # (*src == '\n')
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\r\ndef"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "abcd\ndef"
+test chan-io-13.9 {TranslateInputEOL: auto mode: \r followed by not \n} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\rdef"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "abcd\ndef"
+test chan-io-13.10 {TranslateInputEOL: auto mode: \n} -body {
+    # not (*src == '\r') 
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\ndef"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "abcd\ndef"
+test chan-io-13.11 {TranslateInputEOL: EOF char} -body {
+    # (*chanPtr->inEofChar != '\0')
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "abcd\ndefgh"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto -eofchar e
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "abcd\nd"
+test chan-io-13.12 {TranslateInputEOL: find EOF char in src} -body {
+    # (*chanPtr->inEofChar != '\0')
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "\r\n\r\n\r\nab\r\n\r\ndef\r\n\r\n\r\n"
+    chan close $f
+    set f [open $path(test1)]
+    chan configure $f -translation auto -eofchar e
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "\n\n\nab\n\nd"
+
+# Test standard handle management. The functions tested are Tcl_SetStdChannel
+# and Tcl_GetStdChannel. Incidentally we are also testing channel table
+# management.
+
+if {[testConstraint testchannel]} {
+    set consoleFileNames [lsort [testchannel open]]
+} else {
+    # just to avoid an error
+    set consoleFileNames [list]
+}
+
+test chan-io-14.1 {Tcl_SetStdChannel and Tcl_GetStdChannel} {testchannel} {
+    set result ""
+    lappend result [chan configure stdin -buffering]
+    lappend result [chan configure stdout -buffering]
+    lappend result [chan configure stderr -buffering]
+    lappend result [lsort [testchannel open]]
+} [list line line none $consoleFileNames]
+test chan-io-14.2 {Tcl_SetStdChannel and Tcl_GetStdChannel} -setup {
+    interp create x
+    set result ""
+} -body {
+    lappend result [x eval {chan configure stdin -buffering}]
+    lappend result [x eval {chan configure stdout -buffering}]
+    lappend result [x eval {chan configure stderr -buffering}]
+} -cleanup {
+    interp delete x
+} -result {line line none}
+set path(test3) [makeFile {} test3]
+test chan-io-14.3 {Tcl_SetStdChannel & Tcl_GetStdChannel} -constraints {exec openpipe} -body {
+    set f [open $path(test1) w]
+    chan puts -nonewline $f {
+	chan close stdin
+	chan close stdout
+	chan close stderr
+	set f  [}
+    chan puts $f [list open $path(test1) r]]
+    chan puts $f "set f2 \[[list open $path(test2) w]]"
+    chan puts $f "set f3 \[[list open $path(test3) w]]"
+    chan puts $f {	chan puts stdout [chan gets stdin]
+	chan puts stdout out
+	chan puts stderr err
+	chan close $f
+	chan close $f2
+	chan close $f3
+    }
+    chan close $f
+    set result [exec [interpreter] $path(test1)]
+    set f  [open $path(test2) r]
+    set f2 [open $path(test3) r]
+    lappend result [chan read $f] [chan read $f2]
+} -cleanup {
+    chan close $f
+    chan close $f2
+} -result {{
+out
+} {err
+}}
+# This test relies on the fact that stdout is used before stderr.
+test chan-io-14.4 {Tcl_SetStdChannel & Tcl_GetStdChannel} -constraints {exec} -body {
+    set f [open $path(test1) w]
+    chan puts -nonewline $f { chan close stdin
+	chan close stdout
+	chan close stderr
+	set f  [}
+    chan puts $f [list open $path(test1) r]]
+    chan puts $f "set f2 \[[list open $path(test2) w]]"
+    chan puts $f "set f3 \[[list open $path(test3) w]]"
+    chan puts $f {
+	chan puts stdout [chan gets stdin]
+	chan puts stdout $f2
+	chan puts stderr $f3
+	chan close $f
+	chan close $f2
+	chan close $f3
+    }
+    chan close $f
+    set result [exec [interpreter] $path(test1)]
+    set f  [open $path(test2) r]
+    set f2 [open $path(test3) r]
+    lappend result [chan read $f] [chan read $f2]
+} -cleanup {
+    chan close $f
+    chan close $f2
+} -result {{ chan close stdin
+stdout
+} {stderr
+}}
+catch {interp delete z}
+test chan-io-14.5 {Tcl_GetChannel: stdio name translation} -setup {
+    interp create z
+} -body {
+    chan eof stdin
+    catch {z eval chan flush stdin} msg1
+    catch {z eval chan close stdin} msg2
+    catch {z eval chan flush stdin} msg3
+    list $msg1 $msg2 $msg3
+} -cleanup {
+    interp delete z
+} -result {{channel "stdin" wasn't opened for writing} {} {can not find channel named "stdin"}}
+test chan-io-14.6 {Tcl_GetChannel: stdio name translation} -setup {
+    interp create z
+} -body {
+    chan eof stdout
+    catch {z eval chan flush stdout} msg1
+    catch {z eval chan close stdout} msg2
+    catch {z eval chan flush stdout} msg3
+    list $msg1 $msg2 $msg3
+} -cleanup {
+    interp delete z
+} -result {{} {} {can not find channel named "stdout"}}
+test chan-io-14.7 {Tcl_GetChannel: stdio name translation} -setup {
+    interp create z
+} -body {
+    chan eof stderr
+    catch {z eval chan flush stderr} msg1
+    catch {z eval chan close stderr} msg2
+    catch {z eval chan flush stderr} msg3
+    list $msg1 $msg2 $msg3
+} -cleanup {
+    interp delete z
+} -result {{} {} {can not find channel named "stderr"}}
+set path(script) [makeFile {} script]
+test chan-io-14.8 {reuse of stdio special channels} -setup {
+    file delete $path(script)
+    file delete $path(test1)
+} -constraints {stdio openpipe} -body {
+    set f [open $path(script) w]
+    chan puts -nonewline $f {
+	chan close stderr
+	set f [}
+    chan puts $f [list open $path(test1) w]]
+    chan puts -nonewline $f {
+	chan puts stderr hello
+	chan close $f
+	set f [}
+    chan puts $f [list open $path(test1) r]]
+    chan puts $f {
+	chan puts [chan gets $f]
+    }
+    chan close $f
+    set f [openpipe r $path(script)]
+    chan gets $f
+} -cleanup {
+    chan close $f
+} -result hello
+test chan-io-14.9 {reuse of stdio special channels} -setup {
+    file delete $path(script)
+    file delete $path(test1)
+} -constraints {stdio openpipe fileevent} -body {
+    set f [open $path(script) w]
+    chan puts $f {
+        array set path [lindex $argv 0]
+	set f [open $path(test1) w]
+	chan puts $f hello
+	chan close $f
+	chan close stderr
+	set f [open "|[list [info nameofexecutable] $path(cat) $path(test1)]" r]
+	chan puts [chan gets $f]
+    }
+    chan close $f
+    set f [openpipe r $path(script) [array get path]]
+    chan gets $f
+} -cleanup {
+    chan close $f
+    # Added delay to give Windows time to stop the spawned process and clean
+    # up its grip on the file test1. Added delete as proper test cleanup.
+    # The failing tests were 18.1 and 18.2 as first re-users of file "test1".
+    after [expr {[testConstraint win] ? 10000 : 500}]
+    file delete $path(script)
+    file delete $path(test1)
+} -result hello
+
+test chan-io-15.1 {Tcl_CreateChan CloseHandler} emptyTest {
+} {}
+
+test chan-io-16.1 {Tcl_DeleteChan CloseHandler} emptyTest {
+} {}
+
+# Test channel table management. The functions tested are GetChannelTable,
+# DeleteChannelTable, Tcl_RegisterChannel, Tcl_UnregisterChannel,
+# Tcl_GetChannel and Tcl_CreateChannel.
+#
+# These functions use "eof stdin" to ensure that the standard channels are
+# added to the channel table of the interpreter.
+
+test chan-io-17.1 {GetChannelTable, DeleteChannelTable on std handles} -setup {
+    set l ""
+} -constraints {testchannel} -body {
+    set l1 [testchannel refcount stdin]
+    chan eof stdin
+    interp create x
+    lappend l [expr {[testchannel refcount stdin] - $l1}]
+    x eval {chan eof stdin}
+    lappend l [expr {[testchannel refcount stdin] - $l1}]
+    interp delete x
+    lappend l [expr {[testchannel refcount stdin] - $l1}]
+} -result {0 1 0}
+test chan-io-17.2 {GetChannelTable, DeleteChannelTable on std handles} -setup  {
+    set l ""
+} -constraints {testchannel} -body {
+    set l1 [testchannel refcount stdout]
+    chan eof stdin
+    interp create x
+    lappend l [expr {[testchannel refcount stdout] - $l1}]
+    x eval {chan eof stdout}
+    lappend l [expr {[testchannel refcount stdout] - $l1}]
+    interp delete x
+    lappend l [expr {[testchannel refcount stdout] - $l1}]
+} -result {0 1 0}
+test chan-io-17.3 {GetChannelTable, DeleteChannelTable on std handles} -setup {
+    set l ""
+} -constraints {testchannel} -body {
+    set l1 [testchannel refcount stderr]
+    chan eof stdin
+    interp create x
+    lappend l [expr {[testchannel refcount stderr] - $l1}]
+    x eval {chan eof stderr}
+    lappend l [expr {[testchannel refcount stderr] - $l1}]
+    interp delete x
+    lappend l [expr {[testchannel refcount stderr] - $l1}]
+} -result {0 1 0}
+
+test chan-io-18.1 {Tcl_RegisterChannel, Tcl_UnregisterChannel} -setup {
+    file delete -force $path(test1)
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    lappend l [lindex [testchannel info $f] 15]
+    chan close $f
+    if {[catch {lindex [testchannel info $f] 15} msg]} {
+	lappend l $msg
+    } else {
+	lappend l "very broken: $f found after being chan closed"
+    }
+    string equal $l [list 1 "can not find channel named \"$f\""]
+} -result 1
+test chan-io-18.2 {Tcl_RegisterChannel, Tcl_UnregisterChannel} -setup {
+    file delete -force $path(test1)
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    lappend l [lindex [testchannel info $f] 15]
+    interp create x
+    interp share "" $f x
+    lappend l [lindex [testchannel info $f] 15]
+    x eval chan close $f
+    lappend l [lindex [testchannel info $f] 15]
+    interp delete x
+    lappend l [lindex [testchannel info $f] 15]
+    chan close $f
+    if {[catch {lindex [testchannel info $f] 15} msg]} {
+	lappend l $msg
+    } else {
+	lappend l "very broken: $f found after being chan closed"
+    }
+    string equal $l [list 1 2 1 1 "can not find channel named \"$f\""]
+} -result 1
+test chan-io-18.3 {Tcl_RegisterChannel, Tcl_UnregisterChannel} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    lappend l [lindex [testchannel info $f] 15]
+    interp create x
+    interp share "" $f x
+    lappend l [lindex [testchannel info $f] 15]
+    interp delete x
+    lappend l [lindex [testchannel info $f] 15]
+    chan close $f
+    if {[catch {lindex [testchannel info $f] 15} msg]} {
+	lappend l $msg
+    } else {
+	lappend l "very broken: $f found after being chan closed"
+    }
+    string equal $l [list 1 2 1 "can not find channel named \"$f\""]
+} -result 1
+
+test chan-io-19.1 {Tcl_GetChannel->Tcl_GetStdChannel, standard handles} {
+    chan eof stdin
+} 0
+test chan-io-19.2 {testing Tcl_GetChannel, user opened handle} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan eof $f
+} -cleanup {
+    chan close $f
+} -result 0
+test chan-io-19.3 {Tcl_GetChannel, channel not found} -body {
+    chan eof file34
+} -returnCodes error -result {can not find channel named "file34"}
+test chan-io-19.4 {Tcl_CreateChannel, insertion into channel table} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    lappend l [chan eof $f]
+    chan close $f
+    if {[catch {lindex [testchannel info $f] 15} msg]} {
+	lappend l $msg
+    } else {
+	lappend l "very broken: $f found after being chan closed"
+    }
+    string equal $l [list 0 "can not find channel named \"$f\""]
+} -result 1
+
+test chan-io-20.1 {Tcl_CreateChannel: initial settings} -setup {
+    set old [encoding system]
+} -body {
+    set a [open $path(test2) w]
+    encoding system ascii
+    set f [open $path(test1) w]
+    chan configure $f -encoding
+} -cleanup {
+    encoding system $old
+    chan close $f
+    chan close $a
+} -result {ascii}
+test chan-io-20.2 {Tcl_CreateChannel: initial settings} -constraints {win} -body {
+    set f [open $path(test1) w+]
+    list [chan configure $f -eofchar] [chan configure $f -translation]
+} -cleanup {
+    chan close $f
+} -result [list [list \x1a ""] {auto crlf}]
+test chan-io-20.3 {Tcl_CreateChannel: initial settings} -constraints {unix} -body {
+    set f [open $path(test1) w+]
+    list [chan configure $f -eofchar] [chan configure $f -translation]
+} -cleanup {
+    chan close $f
+} -result {{{} {}} {auto lf}}
+test chan-io-20.5 {Tcl_CreateChannel: install channel in empty slot} -setup {
+    set path(stdout) [makeFile {} stdout]
+} -constraints {stdio openpipe} -body {
+    set f [open $path(script) w]
+    chan puts -nonewline $f {
+	chan close stdout
+	set f1 [}
+    chan puts $f [list open $path(stdout) w]]
+    chan puts $f {
+	chan configure $f1 -buffersize 777
+	chan puts stderr [chan configure stdout -buffersize]
+    }
+    chan close $f
+    set f [openpipe r $path(script)]
+    chan close $f
+} -cleanup {
+    removeFile $path(stdout)
+} -returnCodes error -result {777}
+
+test chan-io-21.1 {Chan CloseChannelsOnExit} emptyTest {
+} {}
+
+# Test management of attributes associated with a channel, such as its default
+# translation, its name and type, etc. The functions tested in this group are
+# Tcl_GetChannelName, Tcl_GetChannelType and Tcl_GetChannelFile.
+# Tcl_GetChannelInstanceData not tested because files do not use the instance
+# data.
+
+test chan-io-22.1 {Tcl_GetChannelMode} emptyTest {
+    # Not used anywhere in Tcl.
+} {}
+
+test chan-io-23.1 {Tcl_GetChannelName} -constraints {testchannel} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    set n [testchannel name $f]
+    expr {$n eq $f ? "ok" : "$n != $f"}
+} -cleanup {
+    chan close $f
+} -result ok
+
+test chan-io-24.1 {Tcl_GetChannelType} -constraints {testchannel} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    testchannel type $f
+} -cleanup {
+    chan close $f
+} -result "file"
+
+test chan-io-25.1 {Tcl_GetChannelHandle, input} -setup {
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f "1234567890\n098765432"
+    chan close $f
+    set f [open $path(test1) r]
+    chan gets $f
+    lappend l [testchannel inputbuffered $f]
+    lappend l [chan tell $f]
+} -cleanup {
+    chan close $f
+} -result {10 11}
+test chan-io-25.2 {Tcl_GetChannelHandle, output} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f hello
+    lappend l [testchannel outputbuffered $f]
+    lappend l [chan tell $f]
+    chan flush $f
+    lappend l [testchannel outputbuffered $f]
+    lappend l [chan tell $f]
+} -cleanup {
+    chan close $f
+    file delete $path(test1)
+} -result {6 6 0 6}
+
+test chan-io-26.1 {Tcl_GetChannelInstanceData} -body {
+    # "pid" command uses Tcl_GetChannelInstanceData
+    # Don't care what pid is (but must be a number), just want to exercise it.
+    set f [openpipe r << exit]
+    pid $f
+} -constraints {stdio openpipe} -cleanup {
+    chan close $f
+} -match regexp -result {^\d+$}
+
+# Test flushing. The functions tested here are FlushChannel.
+
+test chan-io-27.1 {FlushChannel, no output buffered} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan flush $f
+    file size $path(test1)
+} -cleanup {
+    chan close $f
+} -result 0
+test chan-io-27.2 {FlushChannel, some output buffered} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f hello
+    lappend l [file size $path(test1)]
+    chan flush $f
+    lappend l [file size $path(test1)]
+    chan close $f
+    lappend l [file size $path(test1)]
+} -result {0 6 6}
+test chan-io-27.3 {FlushChannel, implicit flush on chan close} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f hello
+    lappend l [file size $path(test1)]
+    chan close $f
+    lappend l [file size $path(test1)]
+} -result {0 6}
+test chan-io-27.4 {FlushChannel, implicit flush when buffer fills} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar {}
+    chan configure $f -buffersize 60
+    lappend l [file size $path(test1)]
+    for {set i 0} {$i < 12} {incr i} {
+	chan puts $f hello
+    }
+    lappend l [file size $path(test1)]
+    chan flush $f
+    lappend l [file size $path(test1)]
+} -cleanup {
+    chan close $f
+} -result {0 60 72}
+test chan-io-27.5 {FlushChannel, implicit flush when buffer fills and on chan close} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {unixOrPc} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -buffersize 60 -eofchar {}
+    lappend l [file size $path(test1)]
+    for {set i 0} {$i < 12} {incr i} {
+	chan puts $f hello
+    }
+    lappend l [file size $path(test1)]
+    chan close $f
+    lappend l [file size $path(test1)]
+} -result {0 60 72}
+set path(pipe)   [makeFile {} pipe]
+set path(output) [makeFile {} output]
+test chan-io-27.6 {FlushChannel, async flushing, async chan close} -setup {
+    file delete $path(pipe)
+    file delete $path(output)
+} -constraints {stdio asyncPipeChan Close openpipe} -body {
+    set f [open $path(pipe) w]
+    chan puts $f "set f \[[list open $path(output) w]]"
+    chan puts $f {
+	chan configure $f -translation lf -buffering none -eofchar {}
+	while {![chan eof stdin]} {
+	    after 20
+	    chan puts -nonewline $f [chan read stdin 1024]
+	}
+	chan close $f
+    }
+    chan close $f
+    set x 01234567890123456789012345678901
+    for {set i 0} {$i < 11} {incr i} {
+        set x "$x$x"
+    }
+    set f [open $path(output) w]
+    chan close $f
+    set f [openpipe w $path(pipe)]
+    chan configure $f -blocking off
+    chan puts -nonewline $f $x
+    chan close $f
+    set counter 0
+    while {([file size $path(output)] < 65536) && ($counter < 1000)} {
+	after 20 [list incr [namespace which -variable counter]]
+	vwait [namespace which -variable counter]
+    }
+    if {$counter == 1000} {
+        set result "file size only [file size $path(output)]"
+    } else {
+        set result ok
+    }
+} -result ok
+
+# Tests closing a channel. The functions tested are Chan CloseChannel and
+# Tcl_Chan Close.
+
+test chan-io-28.1 {Chan CloseChannel called when all references are dropped} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    interp create x
+    interp share "" $f x
+    lappend l [testchannel refcount $f]
+    x eval chan close $f
+    interp delete x
+    lappend l [testchannel refcount $f]
+} -cleanup {
+    chan close $f
+} -result {2 1}
+test chan-io-28.2 {Chan CloseChannel called when all references are dropped} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    interp create x
+    interp share "" $f x
+    chan puts -nonewline $f abc
+    chan close $f
+    x eval chan puts $f def
+    x eval chan close $f
+    interp delete x
+    set f [open $path(test1) r]
+    chan gets $f
+} -cleanup {
+    chan close $f
+} -result abcdef
+test chan-io-28.3 {Chan CloseChannel, not called before output queue is empty} -setup {
+    file delete $path(pipe)
+    file delete $path(output)
+} -constraints {stdio asyncPipeChan Close nonPortable openpipe} -body {
+    set f [open $path(pipe) w]
+    chan puts $f {
+	# Need to not have eof char appended on chan close, because the other
+	# side of the pipe already chan closed, so that writing would cause an
+	# error "invalid file".
+	chan configure stdout -eofchar {}
+	chan configure stderr -eofchar {}
+	set f [open $path(output) w]
+	chan configure $f -translation lf -buffering none
+	for {set x 0} {$x < 20} {incr x} {
+	    after 20
+	    chan puts -nonewline $f [chan read stdin 1024]
+	}
+	chan close $f
+    }
+    chan close $f
+    set x 01234567890123456789012345678901
+    for {set i 0} {$i < 11} {incr i} {
+        set x "$x$x"
+    }
+    set f [open $path(output) w]
+    chan close $f
+    set f [openpipe r+ $path(pipe)]
+    chan configure $f -blocking off -eofchar {}
+    chan puts -nonewline $f $x
+    chan close $f
+    set counter 0
+    while {([file size $path(output)] < 20480) && ($counter < 1000)} {
+	after 20 [list incr [namespace which -variable counter]]
+	vwait [namespace which -variable counter]
+    }
+    if {$counter == 1000} {
+        set result probably_broken
+    } else {
+        set result ok
+    }
+} -result ok
+test chan-io-28.4 {Tcl_Chan Close} -constraints {testchannel} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    lappend l [lsort [testchannel open]]
+    set f [open $path(test1) w]
+    lappend l [lsort [testchannel open]]
+    chan close $f
+    lappend l [lsort [testchannel open]]
+    set x [list $consoleFileNames \
+		[lsort [list {*}$consoleFileNames $f]] \
+		$consoleFileNames]
+    expr {$l eq $x ? "ok" : "{$l} != {$x}"}
+} -result ok
+test chan-io-28.5 {Tcl_Chan Close vs standard handles} -setup {
+    file delete $path(script)
+} -constraints {stdio unix testchannel openpipe} -body {
+    set f [open $path(script) w]
+    chan puts $f {
+	chan close stdin
+	chan puts [testchannel open]
+    }
+    chan close $f
+    set f [openpipe r $path(script)]
+    set l [chan gets $f]
+    chan close $f
+    lsort $l
+} -result {file1 file2}
+test chan-io-28.6 {Tcl_CloseEx (half-close) pipe} -setup {
+    set cat [makeFile {
+	fconfigure stdout -buffering line
+	while {[gets stdin line] >= 0} {puts $line}
+	puts DONE
+	exit 0
+    } cat.tcl]
+    variable done
+} -body {
+    set ff [openpipe r+ $cat]
+    puts $ff Hey
+    close $ff w
+    set timer [after 1000 [namespace code {set done Failed}]]
+    set acc {}
+    fileevent $ff readable [namespace code {
+	if {[gets $ff line] < 0} {
+	    set done Succeeded
+	} else {
+	    lappend acc $line
+	}
+    }]
+    vwait [namespace which -variable done]
+    after cancel $timer
+    close $ff r
+    list $done $acc
+} -cleanup {
+    removeFile cat.tcl
+} -result {Succeeded {Hey DONE}}
+test chan-io-28.7 {Tcl_CloseEx (half-close) socket} -setup {
+    set echo [makeFile {
+	proc accept {s args} {set ::sok $s}
+	set s [socket -server accept 0]
+	puts [lindex [fconfigure $s -sockname] 2]
+	flush stdout
+	vwait ::sok
+	fconfigure $sok -buffering line
+	while {[gets $sok line]>=0} {puts $sok $line}
+	puts $sok DONE
+	exit 0
+    } echo.tcl]
+    variable done
+    unset -nocomplain done
+    set done ""
+    set timer ""
+    set ff [openpipe r $echo]
+    gets $ff port
+} -body {
+    set s [socket 127.0.0.1 $port]
+    puts $s Hey
+    close $s w
+    set timer [after 1000 [namespace code {set done Failed}]]
+    set acc {}
+    fileevent $s readable [namespace code {
+	if {[gets $s line]<0} {
+	    set done Succeeded
+	} else {
+	    lappend acc $line
+	}
+    }]
+    vwait [namespace which -variable done]
+    list $done $acc
+} -cleanup {
+    catch {close $s}
+    close $ff
+    after cancel $timer
+    removeFile echo.tcl
+} -result {Succeeded {Hey DONE}}
+
+test chan-io-29.1 {Tcl_WriteChars, channel not writable} -body {
+    chan puts stdin hello
+} -returnCodes error -result {channel "stdin" wasn't opened for writing}
+test chan-io-29.2 {Tcl_WriteChars, empty string} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -eofchar {}
+    chan puts -nonewline $f ""
+    chan close $f
+    file size $path(test1)
+} -result 0
+test chan-io-29.3 {Tcl_WriteChars, nonempty string} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -eofchar {}
+    chan puts -nonewline $f hello
+    chan close $f
+    file size $path(test1)
+} -result 5
+test chan-io-29.4 {Tcl_WriteChars, buffering in full buffering mode} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -buffering full -eofchar {}
+    chan puts $f hello
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+    chan flush $f
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+} -cleanup {
+    chan close $f
+} -result {6 0 0 6}
+test chan-io-29.5 {Tcl_WriteChars, buffering in line buffering mode} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -buffering line -eofchar {}
+    chan puts -nonewline $f hello
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+    chan puts $f hello
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+} -cleanup {
+    chan close $f
+} -result {5 0 0 11}
+test chan-io-29.6 {Tcl_WriteChars, buffering in no buffering mode} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -buffering none -eofchar {}
+    chan puts -nonewline $f hello
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+    chan puts $f hello
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+} -cleanup {
+    chan close $f
+} -result {0 5 0 11}
+test chan-io-29.7 {Tcl_Flush, full buffering} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -buffering full -eofchar {}
+    chan puts -nonewline $f hello
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+    chan puts $f hello
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+    chan flush $f
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+} -cleanup {
+    chan close $f
+} -result {5 0 11 0 0 11}
+test chan-io-29.8 {Tcl_Flush, full buffering} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -buffering line
+    chan puts -nonewline $f hello
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+    chan flush $f
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+    chan puts $f hello
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+    chan flush $f
+    lappend l [testchannel outputbuffered $f]
+    lappend l [file size $path(test1)]
+} -cleanup {
+    chan close $f
+} -result {5 0 0 5 0 11 0 11}
+test chan-io-29.9 {Tcl_Flush, channel not writable} -body {
+    chan flush stdin
+} -returnCodes error -result {channel "stdin" wasn't opened for writing}
+test chan-io-29.10 {Tcl_WriteChars, looping and buffering} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -eofchar {}
+    set f2 [open $path(longfile) r]
+    for {set x 0} {$x < 10} {incr x} {
+	chan puts $f1 [chan gets $f2]
+    }
+    chan close $f2
+    chan close $f1
+    file size $path(test1)
+} -result 387
+test chan-io-29.11 {Tcl_WriteChars, no newline, implicit flush} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -eofchar {}
+    set f2 [open $path(longfile) r]
+    for {set x 0} {$x < 10} {incr x} {
+	chan puts -nonewline $f1 [chan gets $f2]
+    }
+    chan close $f1
+    chan close $f2
+    file size $path(test1)
+} -result 377
+test chan-io-29.12 {Tcl_WriteChars on a pipe} -setup {
+    file delete $path(test1)
+    file delete $path(pipe)
+} -constraints {stdio openpipe} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 "set f1 \[[list open $path(longfile) r]]"
+    chan puts $f1 {
+	for {set x 0} {$x < 10} {incr x} {
+	    chan puts [chan gets $f1]
+	}
+    }
+    chan close $f1
+    set f1 [openpipe r $path(pipe)]
+    set f2 [open $path(longfile) r]
+    set y ok
+    for {set x 0} {$x < 10} {incr x} {
+	set l1 [chan gets $f1]
+	set l2 [chan gets $f2]
+	if {$l1 ne $l2} {
+	    set y broken:$x
+	}
+    }
+    return $y
+} -cleanup {
+    chan close $f1
+    chan close $f2
+} -result ok
+test chan-io-29.13 {Tcl_WriteChars to a pipe, line buffered} -setup {
+    file delete $path(test1)
+    file delete $path(pipe)
+} -constraints {stdio openpipe} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {
+	chan puts [chan gets stdin]
+	chan puts [chan gets stdin]
+    }
+    chan close $f1
+    set y ok
+    set f1 [openpipe r+ $path(pipe)]
+    chan configure $f1 -buffering line
+    set f2 [open $path(longfile) r]
+    set line [chan gets $f2]
+    chan puts $f1 $line
+    set backline [chan gets $f1]
+    if {$line ne $backline} {
+	set y broken1
+    }
+    set line [chan gets $f2]
+    chan puts $f1 $line
+    set backline [chan gets $f1]
+    if {$line ne $backline} {
+	set y broken2
+    }
+    return $y
+} -cleanup {
+    chan close $f1
+    chan close $f2
+} -result ok
+test chan-io-29.14 {Tcl_WriteChars, buffering and implicit flush at chan close} -setup {
+    file delete $path(test3)
+} -body {
+    set f [open $path(test3) w]
+    chan puts -nonewline $f "Text1"
+    chan puts -nonewline $f " Text 2"
+    chan puts $f " Text 3"
+    chan close $f
+    set f [open $path(test3) r]
+    chan gets $f
+} -cleanup {
+    chan close $f
+} -result {Text1 Text 2 Text 3}
+test chan-io-29.15 {Tcl_Flush, channel not open for writing} -setup {
+    file delete $path(test1)
+    set fd [open $path(test1) w]
+    chan close $fd
+} -body {
+    set fd [open $path(test1) r]
+    chan flush $fd
+} -returnCodes error -cleanup {
+    catch {chan close $fd}
+} -match glob -result {channel "*" wasn't opened for writing}
+test chan-io-29.16 {Tcl_Flush on pipe opened only for reading} -setup {
+    set fd [openpipe r cat longfile]
+} -constraints {stdio openpipe} -body {
+    chan flush $fd
+} -returnCodes error -cleanup {
+    catch {chan close $fd}
+} -match glob -result {channel "*" wasn't opened for writing}
+test chan-io-29.17 {Tcl_WriteChars buffers, then Tcl_Flush flushes} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf
+    chan puts $f1 hello
+    chan puts $f1 hello
+    chan puts $f1 hello
+    chan flush $f1
+    file size $path(test1)
+} -cleanup {
+    chan close $f1
+} -result 18
+test chan-io-29.18 {Tcl_WriteChars and Tcl_Flush intermixed} -setup {
+    file delete $path(test1)
+    set x ""
+    set f1 [open $path(test1) w]
+} -body {
+    chan configure $f1 -translation lf
+    chan puts $f1 hello
+    chan puts $f1 hello
+    chan puts $f1 hello
+    chan flush $f1
+    lappend x [file size $path(test1)]
+    chan puts $f1 hello
+    chan flush $f1
+    lappend x [file size $path(test1)]
+    chan puts $f1 hello
+    chan flush $f1
+    lappend x [file size $path(test1)]
+} -cleanup {
+    chan close $f1
+} -result {18 24 30}
+test chan-io-29.19 {Explicit and implicit flushes} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -eofchar {}
+    set x ""
+    chan puts $f1 hello
+    chan puts $f1 hello
+    chan puts $f1 hello
+    chan flush $f1
+    lappend x [file size $path(test1)]
+    chan puts $f1 hello
+    chan flush $f1
+    lappend x [file size $path(test1)]
+    chan puts $f1 hello
+    chan close $f1
+    lappend x [file size $path(test1)]
+} -result {18 24 30}
+test chan-io-29.20 {Implicit flush when buffer is full} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -eofchar {}
+    set line "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+    for {set x 0} {$x < 100} {incr x} {
+      chan puts $f1 $line
+    }
+    set z ""
+    lappend z [file size $path(test1)]
+    for {set x 0} {$x < 100} {incr x} {
+	chan puts $f1 $line
+    }
+    lappend z [file size $path(test1)]
+    chan close $f1
+    lappend z [file size $path(test1)]
+} -result {4096 12288 12600}
+test chan-io-29.21 {Tcl_Flush to pipe} -setup {
+    file delete $path(pipe)
+} -constraints {stdio openpipe} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {set x [chan read stdin 6]}
+    chan puts $f1 {set cnt [string length $x]}
+    chan puts $f1 {chan puts "read $cnt characters"}
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    chan puts $f1 hello
+    chan flush $f1
+    chan gets $f1
+} -cleanup {
+    catch {chan close $f1}
+} -result "read 6 characters"
+test chan-io-29.22 {Tcl_Flush called at other end of pipe} -setup {
+    file delete $path(pipe)
+} -constraints {stdio openpipe} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {
+	chan configure stdout -buffering full
+	chan puts hello
+	chan puts hello
+	chan flush stdout
+	chan gets stdin
+	chan puts bye
+	chan flush stdout
+    }
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    set x ""
+    lappend x [chan gets $f1]
+    lappend x [chan gets $f1]
+    chan puts $f1 hello
+    chan flush $f1
+    lappend x [chan gets $f1]
+} -cleanup {
+    chan close $f1
+} -result {hello hello bye}
+test chan-io-29.23 {Tcl_Flush and line buffering at end of pipe} -setup {
+    file delete $path(pipe)
+} -constraints {stdio openpipe} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {
+	chan puts hello
+	chan puts hello
+	chan gets stdin
+	chan puts bye
+    }
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    set x ""
+    lappend x [chan gets $f1]
+    lappend x [chan gets $f1]
+    chan puts $f1 hello
+    chan flush $f1
+    lappend x [chan gets $f1]
+} -cleanup {
+    chan close $f1
+} -result {hello hello bye}
+test chan-io-29.24 {Tcl_WriteChars and Tcl_Flush move end of file} -setup {
+    variable x {}
+} -body {
+    set f [open $path(test3) w]
+    chan puts $f "Line 1"
+    chan puts $f "Line 2"
+    set f2 [open $path(test3)]
+    lappend x [chan read -nonewline $f2]
+    chan close $f2
+    chan flush $f
+    set f2 [open $path(test3)]
+    lappend x [chan read -nonewline $f2]
+} -cleanup {
+    chan close $f2
+    chan close $f
+} -result "{} {Line 1\nLine 2}"
+test chan-io-29.25 {Implicit flush with Tcl_Flush to command pipelines} -setup {
+    file delete $path(test3)
+} -constraints {stdio openpipe fileevent} -body {
+    set f [openpipe w $path(cat) | [interpreter] $path(cat) > $path(test3)]
+    chan puts $f "Line 1"
+    chan puts $f "Line 2"
+    chan close $f
+    after 100
+    set f [open $path(test3) r]
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "Line 1\nLine 2\n"
+test chan-io-29.26 {Tcl_Flush, Tcl_Write on bidirectional pipelines} -constraints {stdio unixExecs openpipe} -body {
+    set f [open "|[list cat -u]" r+]
+    chan puts $f "Line1"
+    chan flush $f
+    chan gets $f
+} -cleanup {
+    chan close $f
+} -result {Line1}
+test chan-io-29.27 {Tcl_Flush on chan closed pipeline} -setup {
+    file delete $path(pipe)
+    set f [open $path(pipe) w]
+    chan puts $f {exit}
+    chan close $f
+} -constraints {stdio openpipe} -body {
+    set f [openpipe r+ $path(pipe)]
+    chan gets $f
+    chan puts $f output
+    after 50
+    #
+    # The flush below will get a SIGPIPE. This is an expected part of the test
+    # and indicates that the test operates correctly. If you run this test
+    # under a debugger, the signal will by intercepted unless you disable the
+    # debugger's signal interception.
+    #
+    if {[catch {chan flush $f} msg]} {
+	set x [list 1 $msg $::errorCode]
+	catch {chan close $f}
+    } elseif {[catch {chan close $f} msg]} {
+	set x [list 1 $msg $::errorCode]
+    } else {
+	set x {this was supposed to fail and did not}
+    }
+    string tolower $x
+} -match glob -result {1 {error flushing "*": broken pipe} {posix epipe {broken pipe}}}
+test chan-io-29.28 {Tcl_WriteChars, lf mode} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f hello\nthere\nand\nhere
+    chan flush $f
+    file size $path(test1)
+} -cleanup {
+    chan close $f
+} -result 21
+test chan-io-29.29 {Tcl_WriteChars, cr mode} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr -eofchar {}
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    file size $path(test1)
+} -result 21
+test chan-io-29.30 {Tcl_WriteChars, crlf mode} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf -eofchar {}
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    file size $path(test1)
+} -result 25
+test chan-io-29.31 {Tcl_WriteChars, background flush} -setup {
+    file delete $path(pipe)
+    file delete $path(output)
+} -constraints {stdio openpipe} -body {
+    set f [open $path(pipe) w]
+    chan puts $f "set f \[[list open $path(output)  w]]"
+    chan puts $f {chan configure $f -translation lf}
+    set x [list while {![chan eof stdin]}]
+    set x "$x {"
+    chan puts $f $x
+    chan puts $f {  chan puts -nonewline $f [chan read stdin 4096]}
+    chan puts $f {  chan flush $f}
+    chan puts $f "}"
+    chan puts $f {chan close $f}
+    chan close $f
+    set x 01234567890123456789012345678901
+    for {set i 0} {$i < 11} {incr i} {
+	set x "$x$x"
+    }
+    set f [open $path(output) w]
+    chan close $f
+    set f [openpipe r+ $path(pipe)]
+    chan configure $f -blocking off
+    chan puts -nonewline $f $x
+    chan close $f
+    set counter 0
+    while {([file size $path(output)] < 65536) && ($counter < 1000)} {
+	after 10 [list incr [namespace which -variable counter]]
+	vwait [namespace which -variable counter]
+    }
+    if {$counter == 1000} {
+	set result "file size only [file size $path(output)]"
+    } else {
+	set result ok
+    }
+    # allow a little time for the background process to chan close.
+    # otherwise, the following test fails on the [file delete $path(output)
+    # on Windows because a process still has the file open.
+    after 100 set v 1; vwait v
+    return $result
+} -result ok
+test chan-io-29.32 {Tcl_WriteChars, background flush to slow reader} -setup {
+    file delete $path(pipe)
+    file delete $path(output)
+} -constraints {stdio asyncPipeChan Close openpipe} -body {
+    set f [open $path(pipe) w]
+    chan puts $f "set f \[[list open $path(output) w]]"
+    chan puts $f {chan configure $f -translation lf}
+    set x [list while {![chan eof stdin]}]
+    set x "$x \{"
+    chan puts $f $x
+    chan puts $f {  after 20}
+    chan puts $f {  chan puts -nonewline $f [chan read stdin 1024]}
+    chan puts $f {  chan flush $f}
+    chan puts $f "\}"
+    chan puts $f {chan close $f}
+    chan close $f
+    set x 01234567890123456789012345678901
+    for {set i 0} {$i < 11} {incr i} {
+	set x "$x$x"
+    }
+    set f [open $path(output) w]
+    chan close $f
+    set f [openpipe r+ $path(pipe)]
+    chan configure $f -blocking off
+    chan puts -nonewline $f $x
+    chan close $f
+    set counter 0
+    while {([file size $path(output)] < 65536) && ($counter < 1000)} {
+	after 20 [list incr [namespace which -variable counter]]
+	vwait [namespace which -variable counter]
+    }
+    if {$counter == 1000} {
+	set result "file size only [file size $path(output)]"
+    } else {
+	set result ok
+    }
+} -result ok
+test chan-io-29.33 {Tcl_Flush, implicit flush on exit} -setup {
+    set f [open $path(script) w]
+    chan puts $f "set f \[[list open $path(test1) w]]"
+    chan puts $f {chan configure $f -translation lf
+	chan puts $f hello
+	chan puts $f bye
+	chan puts $f strange
+    }
+    chan close $f
+} -constraints exec -body {
+    exec [interpreter] $path(script)
+    set f [open $path(test1) r]
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "hello\nbye\nstrange\n"
+test chan-io-29.34 {Tcl_Chan Close, async flush on chan close, using sockets} -setup {
+    variable c 0
+    variable x running
+    set l abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
+    proc writelots {s l} {
+	for {set i 0} {$i < 2000} {incr i} {
+	    chan puts $s $l
+	}
+    }
+} -constraints {socket tempNotMac fileevent} -body {
+    proc accept {s a p} {
+	variable x
+	chan event $s readable [namespace code [list readit $s]]
+	chan configure $s -blocking off
+	set x accepted
+    }
+    proc readit {s} {
+	variable c
+	variable x
+	set l [chan gets $s]
+	if {[chan eof $s]} {
+	    chan close $s
+	    set x done
+	} elseif {([string length $l] > 0) || ![chan blocked $s]} {
+	    incr c
+	}
+    }
+    set ss [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    set cs [socket 127.0.0.1 [lindex [chan configure $ss -sockname] 2]]
+    vwait [namespace which -variable x]
+    chan configure $cs -blocking off
+    writelots $cs $l
+    chan close $cs
+    chan close $ss
+    vwait [namespace which -variable x]
+    return $c
+} -result 2000
+test chan-io-29.35 {Tcl_Chan Close vs chan event vs multiple interpreters} -setup {
+    catch {interp delete x}
+    catch {interp delete y}
+} -constraints {socket tempNotMac fileevent} -body {
+    # On Mac, this test screws up sockets such that subsequent tests using
+    # port 2828 either cause errors or panic().
+    interp create x
+    interp create y
+    set s [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    proc accept {s a p} {
+	chan puts $s hello
+	chan close $s
+    }
+    set c [socket 127.0.0.1 [lindex [chan configure $s -sockname] 2]]
+    interp share {} $c x
+    interp share {} $c y
+    chan close $c
+    x eval {
+	proc readit {s} {
+	    chan gets $s
+	    if {[chan eof $s]} {
+		chan close $s
+	    }
+	}
+    }
+    y eval {
+	proc readit {s} {
+	    chan gets $s
+	    if {[chan eof $s]} {
+		chan close $s
+	    }
+	}
+    }
+    x eval "chan event $c readable \{readit $c\}"
+    y eval "chan event $c readable \{readit $c\}"
+    y eval [list chan close $c]
+    update
+} -cleanup {
+    chan close $s
+    interp delete x
+    interp delete y
+} -result ""
+
+# Test end of line translations. Procedures tested are Tcl_Write, Tcl_Read.
+
+test chan-io-30.1 {Tcl_Write lf, Tcl_Read lf} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation lf
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "hello\nthere\nand\nhere\n"
+test chan-io-30.2 {Tcl_Write lf, Tcl_Read cr} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation cr
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "hello\nthere\nand\nhere\n"
+test chan-io-30.3 {Tcl_Write lf, Tcl_Read crlf} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "hello\nthere\nand\nhere\n"
+test chan-io-30.4 {Tcl_Write cr, Tcl_Read cr} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation cr
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "hello\nthere\nand\nhere\n"
+test chan-io-30.5 {Tcl_Write cr, Tcl_Read lf} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation lf
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "hello\rthere\rand\rhere\r"
+test chan-io-30.6 {Tcl_Write cr, Tcl_Read crlf} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "hello\rthere\rand\rhere\r"
+test chan-io-30.7 {Tcl_Write crlf, Tcl_Read crlf} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "hello\nthere\nand\nhere\n"
+test chan-io-30.8 {Tcl_Write crlf, Tcl_Read lf} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation lf
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "hello\r\nthere\r\nand\r\nhere\r\n"
+test chan-io-30.9 {Tcl_Write crlf, Tcl_Read cr} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation cr
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result "hello\n\nthere\n\nand\n\nhere\n\n"
+test chan-io-30.10 {Tcl_Write lf, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    list [chan read $f] [chan configure $f -translation]
+} -cleanup {
+    chan close $f
+} -result {{hello
+there
+and
+here
+} auto}
+test chan-io-30.11 {Tcl_Write cr, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    list [chan read $f] [chan configure $f -translation]
+} -cleanup {
+    chan close $f
+} -result {{hello
+there
+and
+here
+} auto}
+test chan-io-30.12 {Tcl_Write crlf, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    list [chan read $f] [chan configure $f -translation]
+} -cleanup {
+    chan close $f
+} -result {{hello
+there
+and
+here
+} auto}
+test chan-io-30.13 {Tcl_Write crlf on block boundary, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    set line "123456789ABCDE"	;# 14 char plus crlf
+    chan puts -nonewline $f x	;# shift crlf across block boundary
+    for {set i 0} {$i < 700} {incr i} {
+	chan puts $f $line
+    }
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto
+    string length [chan read $f]
+} -cleanup {
+    chan close $f
+} -result [expr 700*15+1]
+test chan-io-30.14 {Tcl_Write crlf on block boundary, Tcl_Read crlf} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    set line "123456789ABCDE"	;# 14 char plus crlf
+    chan puts -nonewline $f x	;# shift crlf across block boundary
+    for {set i 0} {$i < 700} {incr i} {
+	chan puts $f $line
+    }
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf
+    string length [chan read $f]
+} -cleanup {
+    chan close $f
+} -result [expr 700*15+1]
+test chan-io-30.15 {Tcl_Write mixed, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f hello\nthere\nand\rhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result {hello
+there
+and
+here
+}
+test chan-io-30.16 {Tcl_Write ^Z at end, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f hello\nthere\nand\rhere\n\x1a
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation auto
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result {hello
+there
+and
+here
+}
+test chan-io-30.17 {Tcl_Write, implicit ^Z at end, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -constraints {win} -body {
+    set f [open $path(test1) w]
+    chan configure $f -eofchar \x1a -translation lf
+    chan puts $f hello\nthere\nand\rhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation auto
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result {hello
+there
+and
+here
+}
+test chan-io-30.18 {Tcl_Write, ^Z in middle, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    set s [format "abc\ndef\n%cghi\nqrs" 26]
+    chan puts $f $s
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation auto
+    set l ""
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {abc def 0 {} 1 {} 1}
+test chan-io-30.19 {Tcl_Write, ^Z no newline in middle, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    set s [format "abc\ndef\n%cghi\nqrs" 26]
+    chan puts $f $s
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation auto
+    set l ""
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {abc def 0 {} 1 {} 1}
+test chan-io-30.20 {Tcl_Write, ^Z in middle ignored, Tcl_Read lf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f [format "abc\ndef\n%cghi\nqrs" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation lf -eofchar {}
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result "abc def 0 \x1aghi 0 qrs 0 {} 1"
+test chan-io-30.21 {Tcl_Write, ^Z in middle ignored, Tcl_Read cr} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f [format "abc\ndef\n%cghi\nqrs" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation cr -eofchar {}
+    set x [chan gets $f]
+    lappend l [string equal $x "abc\ndef\n\x1aghi\nqrs\n"]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {1 1 {} 1}
+test chan-io-30.22 {Tcl_Write, ^Z in middle ignored, Tcl_Read crlf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f [format "abc\ndef\n%cghi\nqrs" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf -eofchar {}
+    set x [chan gets $f]
+    lappend l [string equal $x "abc\ndef\n\x1aghi\nqrs\n"]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {1 1 {} 1}
+test chan-io-30.23 {Tcl_Write lf, ^Z in middle, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f [format abc\ndef\n%cqrs\ntuv 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    list [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {8 1}
+test chan-io-30.24 {Tcl_Write lf, ^Z in middle, Tcl_Read lf} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    set c [format abc\ndef\n%cqrs\ntuv 26]
+    chan puts $f $c
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation lf -eofchar \x1a
+    list [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {8 1}
+test chan-io-30.25 {Tcl_Write cr, ^Z in middle, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    set c [format abc\ndef\n%cqrs\ntuv 26]
+    chan puts $f $c
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    list [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {8 1}
+test chan-io-30.26 {Tcl_Write cr, ^Z in middle, Tcl_Read cr} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    set c [format abc\ndef\n%cqrs\ntuv 26]
+    chan puts $f $c
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation cr -eofchar \x1a
+    list [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {8 1}
+test chan-io-30.27 {Tcl_Write crlf, ^Z in middle, Tcl_Read auto} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    set c [format abc\ndef\n%cqrs\ntuv 26]
+    chan puts $f $c
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    list [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {8 1}
+test chan-io-30.28 {Tcl_Write crlf, ^Z in middle, Tcl_Read crlf} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    set c [format abc\ndef\n%cqrs\ntuv 26]
+    chan puts $f $c
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf -eofchar \x1a
+    list [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {8 1}
+
+# Test end of line translations. Functions tested are Tcl_Write and
+# Tcl_Gets.
+
+test chan-io-31.1 {Tcl_Write lf, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+} -cleanup {
+    chan close $f
+} -result {hello 6 auto there 12 auto}
+test chan-io-31.2 {Tcl_Write cr, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+} -cleanup {
+    chan close $f
+} -result {hello 6 auto there 12 auto}
+test chan-io-31.3 {Tcl_Write crlf, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+} -cleanup {
+    chan close $f
+} -result {hello 7 auto there 14 auto}
+test chan-io-31.4 {Tcl_Write lf, Tcl_Gets lf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation lf
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+} -cleanup {
+    chan close $f
+} -result {hello 6 lf there 12 lf}
+test chan-io-31.5 {Tcl_Write lf, Tcl_Gets cr} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation cr
+    lappend l [string length [chan gets $f]]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {21 21 cr 1 {} 21 cr 1}
+test chan-io-31.6 {Tcl_Write lf, Tcl_Gets crlf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf
+    lappend l [string length [chan gets $f]]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {21 21 crlf 1 {} 21 crlf 1}
+test chan-io-31.7 {Tcl_Write cr, Tcl_Gets cr} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation cr
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {hello 6 cr 0 there 12 cr 0}
+test chan-io-31.8 {Tcl_Write cr, Tcl_Gets lf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation lf
+    lappend l [string length [chan gets $f]]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {21 21 lf 1 {} 21 lf 1}
+test chan-io-31.9 {Tcl_Write cr, Tcl_Gets crlf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf
+    lappend l [string length [chan gets $f]]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {21 21 crlf 1 {} 21 crlf 1}
+test chan-io-31.10 {Tcl_Write crlf, Tcl_Gets crlf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {hello 7 crlf 0 there 14 crlf 0}
+test chan-io-31.11 {Tcl_Write crlf, Tcl_Gets cr} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation cr
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+    lappend l [string length [chan gets $f]]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {hello 6 cr 0 6 13 cr 0}
+test chan-io-31.12 {Tcl_Write crlf, Tcl_Gets lf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts $f hello\nthere\nand\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation lf
+    lappend l [string length [chan gets $f]]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+    lappend l [string length [chan gets $f]]
+    lappend l [chan tell $f]
+    lappend l [chan configure $f -translation]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {6 7 lf 0 6 14 lf 0}
+test chan-io-31.13 {binary mode is synonym of lf mode} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation binary
+    chan configure $f -translation
+} -cleanup {
+    chan close $f
+} -result lf
+#
+# Test chan-io-9.14 has been removed because "auto" output translation mode is
+# not supoprted.
+#
+test chan-io-31.14 {Tcl_Write mixed, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f hello\nthere\rand\r\nhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {hello there and here 0 {} 1}
+test chan-io-31.15 {Tcl_Write mixed, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f hello\nthere\rand\r\nhere\r
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {hello there and here 0 {} 1}
+test chan-io-31.16 {Tcl_Write mixed, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f hello\nthere\rand\r\nhere\n
+    chan close $f
+    set f [open $path(test1) r]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {hello there and here 0 {} 1}
+test chan-io-31.17 {Tcl_Write mixed, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f hello\nthere\rand\r\nhere\r\n
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {hello there and here 0 {} 1}
+test chan-io-31.18 {Tcl_Write ^Z at end, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f [format "hello\nthere\nand\rhere\n\%c" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation auto
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {hello there and here 0 {} 1}
+test chan-io-31.19 {Tcl_Write, implicit ^Z at end, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -eofchar \x1a -translation lf
+    chan puts $f hello\nthere\nand\rhere
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation auto
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {hello there and here 0 {} 1}
+test chan-io-31.20 {Tcl_Write, ^Z in middle, Tcl_Gets auto, eofChar} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f [format "abc\ndef\n%cqrs\ntuv" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a
+    chan configure $f -translation auto
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {abc def 0 {} 1}
+test chan-io-31.21 {Tcl_Write, no newline ^Z in middle, Tcl_Gets auto, eofChar} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f [format "abc\ndef\n%cqrs\ntuv" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation auto
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {abc def 0 {} 1}
+test chan-io-31.22 {Tcl_Write, ^Z in middle ignored, Tcl_Gets lf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f [format "abc\ndef\n%cqrs\ntuv" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation lf -eofchar {}
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result "abc def 0 \x1aqrs 0 tuv 0 {} 1"
+test chan-io-31.23 {Tcl_Write, ^Z in middle ignored, Tcl_Gets cr} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr -eofchar {}
+    chan puts $f [format "abc\ndef\n%cqrs\ntuv" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation cr -eofchar {}
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result "abc def 0 \x1aqrs 0 tuv 0 {} 1"
+test chan-io-31.24 {Tcl_Write, ^Z in middle ignored, Tcl_Gets crlf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf -eofchar {}
+    chan puts $f [format "abc\ndef\n%cqrs\ntuv" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf -eofchar {}
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result "abc def 0 \x1aqrs 0 tuv 0 {} 1"
+test chan-io-31.25 {Tcl_Write lf, ^Z in middle, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f [format "abc\ndef\n%cqrs\ntuv" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {abc def 0 {} 1}
+test chan-io-31.26 {Tcl_Write lf, ^Z in middle, Tcl_Gets lf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts $f [format "abc\ndef\n%cqrs\ntuv" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation lf -eofchar \x1a
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {abc def 0 {} 1}
+test chan-io-31.27 {Tcl_Write cr, ^Z in middle, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr -eofchar {}
+    chan puts $f [format "abc\ndef\n%cqrs\ntuv" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {abc def 0 {} 1}
+test chan-io-31.28 {Tcl_Write cr, ^Z in middle, Tcl_Gets cr} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr -eofchar {}
+    chan puts $f [format "abc\ndef\n%cqrs\ntuv" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation cr -eofchar \x1a
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {abc def 0 {} 1}
+test chan-io-31.29 {Tcl_Write crlf, ^Z in middle, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf -eofchar {}
+    chan puts $f [format "abc\ndef\n%cqrs\ntuv" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {abc def 0 {} 1}
+test chan-io-31.30 {Tcl_Write crlf, ^Z in middle, Tcl_Gets crlf} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf -eofchar {}
+    chan puts $f [format "abc\ndef\n%cqrs\ntuv" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf -eofchar \x1a
+    lappend l [chan gets $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {abc def 0 {} 1}
+test chan-io-31.31 {Tcl_Write crlf on block boundary, Tcl_Gets crlf} -setup {
+    file delete $path(test1)
+    set c ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    set line "123456789ABCDE"	;# 14 char plus crlf
+    chan puts -nonewline $f x	;# shift crlf across block boundary
+    for {set i 0} {$i < 700} {incr i} {
+	chan puts $f $line
+    }
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf 
+    while {[chan gets $f line] >= 0} {
+	append c $line\n
+    }
+    chan close $f
+    string length $c
+} -result [expr 700*15+1]
+test chan-io-31.32 {Tcl_Write crlf on block boundary, Tcl_Gets auto} -setup {
+    file delete $path(test1)
+    set c ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    set line "123456789ABCDE"	;# 14 char plus crlf
+    chan puts -nonewline $f x	;# shift crlf across block boundary
+    for {set i 0} {$i < 700} {incr i} {
+	chan puts $f $line
+    }
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto
+    while {[chan gets $f line] >= 0} {
+	append c $line\n
+    }
+    chan close $f
+    string length $c
+} -result [expr 700*15+1]
+
+# Test Tcl_Read and buffering.
+
+test chan-io-32.1 {Tcl_Read, channel not readable} -body {
+    read stdout
+} -returnCodes error -result {channel "stdout" wasn't opened for reading}
+test chan-io-32.2 {Tcl_Read, zero byte count} {
+    chan read stdin 0
+} ""
+test chan-io-32.3 {Tcl_Read, negative byte count} -setup {
+    set f [open $path(longfile) r]
+} -body {
+    chan read $f -1
+} -returnCodes error -cleanup {
+    chan close $f
+} -result {expected non-negative integer but got "-1"}
+test chan-io-32.4 {Tcl_Read, positive byte count} -body {
+    set f [open $path(longfile) r]
+    string length [chan read $f 1024]
+} -cleanup {
+    chan close $f
+} -result 1024
+test chan-io-32.5 {Tcl_Read, multiple buffers} -body {
+    set f [open $path(longfile) r]
+    chan configure $f -buffersize 100
+    string length [chan read $f 1024]
+} -cleanup {
+    chan close $f
+} -result 1024
+test chan-io-32.6 {Tcl_Read, very large read} {
+    set f1 [open $path(longfile) r]
+    set z [chan read $f1 1000000]
+    chan close $f1
+    set l [string length $z]
+    set x ok
+    set z [file size $path(longfile)]
+    if {$z != $l} {
+	set x "$z != $l"
+    }
+    set x
+} ok
+test chan-io-32.7 {Tcl_Read, nonblocking, file} {nonBlockFiles} {
+    set f1 [open $path(longfile) r]
+    chan configure $f1 -blocking off
+    set z [chan read $f1 20]
+    chan close $f1
+    set l [string length $z]
+    set x ok
+    if {$l != 20} {
+	set x "$l != 20"
+    }
+    set x
+} ok
+test chan-io-32.8 {Tcl_Read, nonblocking, file} {nonBlockFiles} {
+    set f1 [open $path(longfile) r]
+    chan configure $f1 -blocking off
+    set z [chan read $f1 1000000]
+    chan close $f1
+    set x ok
+    set l [string length $z]
+    set z [file size $path(longfile)]
+    if {$z != $l} {
+	set x "$z != $l"
+    }
+    set x
+} ok
+test chan-io-32.9 {Tcl_Read, read to end of file} {
+    set f1 [open $path(longfile) r]
+    set z [chan read $f1]
+    chan close $f1
+    set l [string length $z]
+    set x ok
+    set z [file size $path(longfile)]
+    if {$z != $l} {
+	set x "$z != $l"
+    }
+    set x
+} ok
+test chan-io-32.10 {Tcl_Read from a pipe} -setup {
+    file delete $path(pipe)
+} -constraints {stdio openpipe} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {chan puts [chan gets stdin]}
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    chan puts $f1 hello
+    chan flush $f1
+    chan read $f1
+} -cleanup {
+    chan close $f1
+} -result "hello\n"
+test chan-io-32.11 {Tcl_Read from a pipe} -setup {
+    file delete $path(pipe)
+    set x ""
+} -constraints {stdio openpipe} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {chan puts [chan gets stdin]}
+    chan puts $f1 {chan puts [chan gets stdin]}
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    chan puts $f1 hello
+    chan flush $f1
+    lappend x [chan read $f1 6]
+    chan puts $f1 hello
+    chan flush $f1
+    lappend x [chan read $f1]
+} -cleanup {
+    chan close $f1
+} -result {{hello
+} {hello
+}}
+test chan-io-32.12 {Tcl_Read, -nonewline} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan puts $f1 hello
+    chan puts $f1 bye
+    chan close $f1
+    set f1 [open $path(test1) r]
+    chan read -nonewline $f1
+} -cleanup {
+    chan close $f1
+} -result {hello
+bye}
+test chan-io-32.13 {Tcl_Read, -nonewline} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan puts $f1 hello
+    chan puts $f1 bye
+    chan close $f1
+    set f1 [open $path(test1) r]
+    set c [chan read -nonewline $f1]
+    list [string length $c] $c
+} -cleanup {
+    chan close $f1
+} -result {9 {hello
+bye}}
+test chan-io-32.14 {Tcl_Read, reading in small chunks} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan puts $f "Two lines: this one"
+    chan puts $f "and this one"
+    chan close $f
+    set f [open $path(test1)]
+    list [chan read $f 1] [chan read $f 2] [chan read $f]
+} -cleanup {
+    chan close $f
+} -result {T wo { lines: this one
+and this one
+}}
+test chan-io-32.15 {Tcl_Read, asking for more input than available} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan puts $f "Two lines: this one"
+    chan puts $f "and this one"
+    chan close $f
+    set f [open $path(test1)]
+    chan read $f 100
+} -cleanup {
+    chan close $f
+} -result {Two lines: this one
+and this one
+}
+test chan-io-32.16 {Tcl_Read, read to end of file with -nonewline} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan puts $f "Two lines: this one"
+    chan puts $f "and this one"
+    chan close $f
+    set f [open $path(test1)]
+    chan read -nonewline $f
+} -cleanup {
+    chan close $f
+} -result {Two lines: this one
+and this one}
+
+# Test Tcl_Gets.
+
+test chan-io-33.1 {Tcl_Gets, reading what was written} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan puts $f1 "first line"
+    chan close $f1
+    set f1 [open $path(test1) r]
+    chan gets $f1
+} -cleanup {
+    chan close $f1
+} -result {first line}
+test chan-io-33.2 {Tcl_Gets into variable} {
+    set f1 [open $path(longfile) r]
+    set c [chan gets $f1 x]
+    set l [string length x]
+    set z ok
+    if {$l != $l} {
+	set z broken
+    }
+    chan close $f1
+    set z
+} ok
+test chan-io-33.3 {Tcl_Gets from pipe} -setup {
+    file delete $path(pipe)
+} -constraints {stdio openpipe} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {chan puts [chan gets stdin]}
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    chan puts $f1 hello
+    chan flush $f1
+    chan gets $f1
+} -cleanup {
+    chan close $f1
+} -result hello
+test chan-io-33.4 {Tcl_Gets with long line} -setup {
+    file delete $path(test3)
+} -body {
+    set f [open $path(test3) w]
+    chan puts -nonewline $f "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    chan puts -nonewline $f "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    chan puts -nonewline $f "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    chan puts -nonewline $f "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    chan puts $f "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    chan close $f
+    set f [open $path(test3)]
+    chan gets $f
+} -cleanup {
+    chan close $f
+} -result {abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ}
+test chan-io-33.5 {Tcl_Gets with long line} -setup {
+    set f [open $path(test3) w]
+    puts -nonewline $f "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    puts -nonewline $f "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    puts -nonewline $f "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    puts -nonewline $f "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    puts $f "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    close $f
+} -body {
+    set f [open $path(test3)]
+    set x [chan gets $f y]
+    chan close $f
+    list $x $y
+} -result {260 abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ}
+test chan-io-33.6 {Tcl_Gets and end of file} -setup {
+    file delete $path(test3)
+    set x {}
+} -body {
+    set f [open $path(test3) w]
+    chan puts -nonewline $f "Test1\nTest2"
+    chan close $f
+    set f [open $path(test3)]
+    set y {}
+    lappend x [chan gets $f y] $y
+    set y {}
+    lappend x [chan gets $f y] $y
+    set y {}
+    lappend x [chan gets $f y] $y
+} -cleanup {
+    chan close $f
+} -result {5 Test1 5 Test2 -1 {}}
+test chan-io-33.7 {Tcl_Gets and bad variable} -setup {
+    set f [open $path(test3) w]
+    chan puts $f "Line 1"
+    chan puts $f "Line 2"
+    chan close $f
+    catch {unset x}
+    set f [open $path(test3) r]
+} -body {
+    set x 24
+    chan gets $f x(0)
+} -returnCodes error -cleanup {
+    chan close $f
+} -result {can't set "x(0)": variable isn't array}
+test chan-io-33.8 {Tcl_Gets, exercising double buffering} {
+    set f [open $path(test3) w]
+    chan configure $f -translation lf -eofchar {}
+    set x ""
+    for {set y 0} {$y < 99} {incr y} {set x "a$x"}
+    for {set y 0} {$y < 100} {incr y} {chan puts $f $x}
+    chan close $f
+    set f [open $path(test3) r]
+    chan configure $f -translation lf
+    for {set y 0} {$y < 100} {incr y} {chan gets $f}
+    chan close $f
+    set y
+} 100
+test chan-io-33.9 {Tcl_Gets, exercising double buffering} {
+    set f [open $path(test3) w]
+    chan configure $f -translation lf -eofchar {}
+    set x ""
+    for {set y 0} {$y < 99} {incr y} {set x "a$x"}
+    for {set y 0} {$y < 200} {incr y} {chan puts $f $x}
+    chan close $f
+    set f [open $path(test3) r]
+    chan configure $f -translation lf
+    for {set y 0} {$y < 200} {incr y} {chan gets $f}
+    chan close $f
+    set y
+} 200
+test chan-io-33.10 {Tcl_Gets, exercising double buffering} {
+    set f [open $path(test3) w]
+    chan configure $f -translation lf -eofchar {}
+    set x ""
+    for {set y 0} {$y < 99} {incr y} {set x "a$x"}
+    for {set y 0} {$y < 300} {incr y} {chan puts $f $x}
+    chan close $f
+    set f [open $path(test3) r]
+    chan configure $f -translation lf
+    for {set y 0} {$y < 300} {incr y} {chan gets $f}
+    chan close $f
+    set y
+} 300
+
+# Test Tcl_Seek and Tcl_Tell.
+
+test chan-io-34.1 {Tcl_Seek to current position at start of file} -body {
+    set f1 [open $path(longfile) r]
+    chan seek $f1 0 current
+    chan tell $f1
+} -cleanup {
+    chan close $f1
+} -result 0
+test chan-io-34.2 {Tcl_Seek to offset from start} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -eofchar {}
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan close $f1
+    set f1 [open $path(test1) r]
+    chan seek $f1 10 start
+    chan tell $f1
+} -cleanup {
+    chan close $f1
+} -result 10
+test chan-io-34.3 {Tcl_Seek to end of file} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -eofchar {}
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan close $f1
+    set f1 [open $path(test1) r]
+    chan seek $f1 0 end
+    chan tell $f1
+} -cleanup {
+    chan close $f1
+} -result 54
+test chan-io-34.4 {Tcl_Seek to offset from end of file} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -eofchar {}
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan close $f1
+    set f1 [open $path(test1) r]
+    chan seek $f1 -10 end
+    chan tell $f1
+} -cleanup {
+    chan close $f1
+} -result 44
+test chan-io-34.5 {Tcl_Seek to offset from current position} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -eofchar {}
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan close $f1
+    set f1 [open $path(test1) r]
+    chan seek $f1 10 current
+    chan seek $f1 10 current
+    chan tell $f1
+} -cleanup {
+    chan close $f1
+} -result 20
+test chan-io-34.6 {Tcl_Seek to offset from end of file} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -eofchar {}
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan close $f1
+    set f1 [open $path(test1) r]
+    chan seek $f1 -10 end
+    list [chan tell $f1] [chan read $f1]
+} -cleanup {
+    chan close $f1
+} -result {44 {rstuvwxyz
+}}
+test chan-io-34.7 {Tcl_Seek to offset from end of file, then to current position} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -eofchar {}
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan close $f1
+    set f1 [open $path(test1) r]
+    chan seek $f1 -10 end
+    set c1 [chan tell $f1]
+    set r1 [chan read $f1 5]
+    chan seek $f1 0 current
+    list $c1 $r1 [chan tell $f1]
+} -cleanup {
+    chan close $f1
+} -result {44 rstuv 49}
+test chan-io-34.8 {Tcl_Seek on pipes: not supported} -setup {
+    set pipe [openpipe]
+} -constraints {stdio openpipe} -body {
+    chan seek $pipe 0 current
+} -returnCodes error -cleanup {
+    chan close $pipe
+} -match glob -result {error during seek on "*": invalid argument}
+test chan-io-34.9 {Tcl_Seek, testing buffered input flushing} -setup {
+    file delete $path(test3)
+} -body {
+    set f [open $path(test3) w]
+    chan configure $f -eofchar {}
+    chan puts -nonewline $f "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    chan close $f
+    set f [open $path(test3) RDWR]
+    set x [chan read $f 1]
+    chan seek $f 3
+    lappend x [chan read $f 1]
+    chan seek $f 0 start
+    lappend x [chan read $f 1]
+    chan seek $f 10 current
+    lappend x [chan read $f 1]
+    chan seek $f -2 end
+    lappend x [chan read $f 1]
+    chan seek $f 50 end
+    lappend x [chan read $f 1]
+    chan seek $f 1
+    lappend x [chan read $f 1]
+} -cleanup {
+    chan close $f
+} -result {a d a l Y {} b}
+set path(test3) [makeFile {} test3]
+test chan-io-34.10 {Tcl_Seek testing flushing of buffered input} {
+    set f [open $path(test3) w]
+    chan configure $f -translation lf
+    chan puts $f xyz\n123
+    chan close $f
+    set f [open $path(test3) r+]
+    chan configure $f -translation lf
+    set x [chan gets $f]
+    chan seek $f 0 current
+    chan puts $f 456
+    chan close $f
+    list $x [viewFile test3]
+} "xyz {xyz
+456}"
+test chan-io-34.11 {Tcl_Seek testing flushing of buffered output} {
+    set f [open $path(test3) w]
+    chan puts $f xyz\n123
+    chan close $f
+    set f [open $path(test3) w+]
+    chan puts $f xyzzy
+    chan seek $f 2
+    set x [chan gets $f]
+    chan close $f
+    list $x [viewFile test3]
+} "zzy xyzzy"
+test chan-io-34.12 {Tcl_Seek testing combination of write, seek back and read} {
+    set f [open $path(test3) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f xyz\n123
+    chan close $f
+    set f [open $path(test3) a+]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f xyzzy
+    chan flush $f
+    set x [chan tell $f]
+    chan seek $f -4 cur
+    set y [chan gets $f]
+    chan close $f
+    list $x [viewFile test3] $y
+} {14 {xyz
+123
+xyzzy} zzy}
+test chan-io-34.13 {Tcl_Tell at start of file} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan tell $f1
+} -cleanup {
+    chan close $f1
+} -result 0
+test chan-io-34.14 {Tcl_Tell after seek to end of file} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -eofchar {}
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan close $f1
+    set f1 [open $path(test1) r]
+    chan seek $f1 0 end
+    chan tell $f1
+} -cleanup {
+    chan close $f1
+} -result 54
+test chan-io-34.15 {Tcl_Tell combined with seeking} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -eofchar {}
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan puts $f1 "abcdefghijklmnopqrstuvwxyz"
+    chan close $f1
+    set f1 [open $path(test1) r]
+    chan seek $f1 10 start
+    set c1 [chan tell $f1]
+    chan seek $f1 10 current
+    list $c1 [chan tell $f1]
+} -cleanup {
+    chan close $f1
+} -result {10 20}
+test chan-io-34.16 {Tcl_Tell on pipe: always -1} -constraints {stdio openpipe} -body {
+    set f1 [openpipe]
+    chan tell $f1
+} -cleanup {
+    chan close $f1
+} -result -1
+test chan-io-34.17 {Tcl_Tell on pipe: always -1} {stdio openpipe} {
+    set f1 [openpipe]
+    chan puts $f1 {chan puts hello}
+    chan flush $f1
+    set c [chan tell $f1]
+    chan gets $f1
+    chan close $f1
+    set c
+} -1
+test chan-io-34.18 {Tcl_Tell combined with seeking and reading} -setup {
+    file delete $path(test2)
+} -body {
+    set f [open $path(test2) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts -nonewline $f "line1\nline2\nline3\nline4\nline5\n"
+    chan close $f
+    set f [open $path(test2)]
+    chan configure $f -translation lf
+    set x [chan tell $f]
+    chan read $f 3
+    lappend x [chan tell $f]
+    chan seek $f 2
+    lappend x [chan tell $f]
+    chan seek $f 10 current
+    lappend x [chan tell $f]
+    chan seek $f 0 end
+    lappend x [chan tell $f]
+} -cleanup {
+    chan close $f
+} -result {0 3 2 12 30}
+test chan-io-34.19 {Tcl_Tell combined with opening in append mode} -body {
+    set f [open $path(test3) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f "abcdefghijklmnopqrstuvwxyz"
+    chan puts $f "abcdefghijklmnopqrstuvwxyz"
+    chan close $f
+    set f [open $path(test3) a]
+    chan tell $f
+} -cleanup {
+    chan close $f
+} -result 54
+test chan-io-34.20 {Tcl_Tell combined with writing} -setup {
+    set l ""
+} -body {
+    set f [open $path(test3) w]
+    chan seek $f 29 start
+    lappend l [chan tell $f]
+    chan puts -nonewline $f a
+    chan seek $f 39 start
+    lappend l [chan tell $f]
+    chan puts -nonewline $f a
+    lappend l [chan tell $f]
+    chan seek $f 407 end
+    lappend l [chan tell $f]
+} -cleanup {
+    chan close $f
+} -result {29 39 40 447}
+test chan-io-34.21 {Tcl_Seek and Tcl_Tell on large files} -setup {
+    file delete $path(test3)
+    set l ""
+} -constraints {largefileSupport} -body {
+    set f [open $path(test3) w]
+    chan configure $f -encoding binary
+    lappend l [chan tell $f]
+    chan puts -nonewline $f abcdef
+    lappend l [chan tell $f]
+    chan flush $f
+    lappend l [chan tell $f]
+    # 4GB offset!
+    chan seek $f 0x100000000
+    lappend l [chan tell $f]
+    chan puts -nonewline $f abcdef
+    lappend l [chan tell $f]
+    chan close $f
+    lappend l [file size $path(test3)]
+    # truncate...
+    chan close [open $path(test3) w]
+    lappend l [file size $path(test3)]
+} -result {0 6 6 4294967296 4294967302 4294967302 0}
+
+# Test Tcl_Eof
+
+test chan-io-35.1 {Tcl_Eof} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan puts $f hello
+    chan puts $f hello
+    chan close $f
+    set f [open $path(test1)]
+    set x [chan eof $f]
+    lappend x [chan eof $f]
+    chan gets $f
+    lappend x [chan eof $f]
+    chan gets $f
+    lappend x [chan eof $f]
+    chan gets $f
+    lappend x [chan eof $f]
+    lappend x [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {0 0 0 0 1 1}
+test chan-io-35.2 {Tcl_Eof with pipe} -constraints {stdio openpipe} -setup {
+    file delete $path(pipe)
+} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {chan gets stdin}
+    chan puts $f1 {chan puts hello}
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    chan puts $f1 hello
+    set x [chan eof $f1]
+    chan flush $f1
+    lappend x [chan eof $f1]
+    chan gets $f1
+    lappend x [chan eof $f1]
+    chan gets $f1
+    lappend x [chan eof $f1]
+} -cleanup {
+    chan close $f1
+} -result {0 0 0 1}
+test chan-io-35.3 {Tcl_Eof with pipe} -constraints {stdio openpipe} -setup {
+    file delete $path(pipe)
+} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {chan gets stdin}
+    chan puts $f1 {chan puts hello}
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    chan puts $f1 hello
+    set x [chan eof $f1]
+    chan flush $f1
+    lappend x [chan eof $f1]
+    chan gets $f1
+    lappend x [chan eof $f1]
+    chan gets $f1
+    lappend x [chan eof $f1]
+    chan gets $f1
+    lappend x [chan eof $f1]
+    chan gets $f1
+    lappend x [chan eof $f1]
+} -cleanup {
+    chan close $f1
+} -result {0 0 0 1 1 1}
+test chan-io-35.4 {Tcl_Eof, eof detection on nonblocking file} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {nonBlockFiles} -body {
+    chan close [open $path(test1) w]
+    set f [open $path(test1) r]
+    chan configure $f -blocking off
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {{} 1}
+test chan-io-35.5 {Tcl_Eof, eof detection on nonblocking pipe} -setup {
+    file delete $path(pipe)
+    set l ""
+} -constraints {stdio openpipe} -body {
+    set f [open $path(pipe) w]
+    chan puts $f {
+	exit
+    }
+    chan close $f
+    set f [openpipe r $path(pipe)]
+    lappend l [chan gets $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {{} 1}
+test chan-io-35.6 {Tcl_Eof, eof char, lf write, auto read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar \x1a
+    chan puts $f abc\ndef
+    chan close $f
+    set s [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    list $s [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {9 8 1}
+test chan-io-35.7 {Tcl_Eof, eof char, lf write, lf read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar \x1a
+    chan puts $f abc\ndef
+    chan close $f
+    set s [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation lf -eofchar \x1a
+    list $s [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {9 8 1}
+test chan-io-35.8 {Tcl_Eof, eof char, cr write, auto read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr -eofchar \x1a
+    chan puts $f abc\ndef
+    chan close $f
+    set s [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    list $s [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {9 8 1}
+test chan-io-35.9 {Tcl_Eof, eof char, cr write, cr read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr -eofchar \x1a
+    chan puts $f abc\ndef
+    chan close $f
+    set s [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation cr -eofchar \x1a
+    list $s [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {9 8 1}
+test chan-io-35.10 {Tcl_Eof, eof char, crlf write, auto read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf -eofchar \x1a
+    chan puts $f abc\ndef
+    chan close $f
+    set s [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    list $s [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {11 8 1}
+test chan-io-35.11 {Tcl_Eof, eof char, crlf write, crlf read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf -eofchar \x1a
+    chan puts $f abc\ndef
+    chan close $f
+    set s [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf -eofchar \x1a
+    list $s [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {11 8 1}
+test chan-io-35.12 {Tcl_Eof, eof char in middle, lf write, auto read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f [format abc\ndef\n%cqrs\nuvw 26]
+    chan close $f
+    set c [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    list $c [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {17 8 1}
+test chan-io-35.13 {Tcl_Eof, eof char in middle, lf write, lf read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f [format abc\ndef\n%cqrs\nuvw 26]
+    chan close $f
+    set c [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation lf -eofchar \x1a
+    list $c [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {17 8 1}
+test chan-io-35.14 {Tcl_Eof, eof char in middle, cr write, auto read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr -eofchar {}
+    chan puts $f [format abc\ndef\n%cqrs\nuvw 26]
+    chan close $f
+    set c [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    list $c [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {17 8 1}
+test chan-io-35.15 {Tcl_Eof, eof char in middle, cr write, cr read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr -eofchar {}
+    chan puts $f [format abc\ndef\n%cqrs\nuvw 26]
+    chan close $f
+    set c [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation cr -eofchar \x1a
+    list $c [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {17 8 1}
+test chan-io-35.16 {Tcl_Eof, eof char in middle, crlf write, auto read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf -eofchar {}
+    chan puts $f [format abc\ndef\n%cqrs\nuvw 26]
+    chan close $f
+    set c [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    list $c [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {21 8 1}
+test chan-io-35.17 {Tcl_Eof, eof char in middle, crlf write, crlf read} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf -eofchar {}
+    chan puts $f [format abc\ndef\n%cqrs\nuvw 26]
+    chan close $f
+    set c [file size $path(test1)]
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf -eofchar \x1a
+    list $c [string length [chan read $f]] [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {21 8 1}
+
+# Test Tcl_InputBlocked
+
+test chan-io-36.1 {Tcl_InputBlocked on nonblocking pipe} -setup {
+    set x ""
+} -constraints {stdio openpipe} -body {
+    set f1 [openpipe]
+    chan puts $f1 {chan puts hello_from_pipe}
+    chan flush $f1
+    chan gets $f1
+    chan configure $f1 -blocking off -buffering full
+    chan puts $f1 {chan puts hello}
+    lappend x [chan gets $f1]
+    lappend x [chan blocked $f1]
+    chan flush $f1
+    after 200
+    lappend x [chan gets $f1]
+    lappend x [chan blocked $f1]
+    lappend x [chan gets $f1]
+    lappend x [chan blocked $f1]
+} -cleanup {
+    chan close $f1
+} -result {{} 1 hello 0 {} 1}
+test chan-io-36.2 {Tcl_InputBlocked on blocking pipe} -setup {
+    set x ""
+} -constraints {stdio openpipe} -body {
+    set f1 [openpipe]
+    chan configure $f1 -buffering line
+    chan puts $f1 {chan puts hello_from_pipe}
+    lappend x [chan gets $f1]
+    lappend x [chan blocked $f1]
+    chan puts $f1 {exit}
+    lappend x [chan gets $f1]
+    lappend x [chan blocked $f1]
+    lappend x [chan eof $f1]
+} -cleanup {
+    chan close $f1
+} -result {hello_from_pipe 0 {} 0 1}
+test chan-io-36.3 {Tcl_InputBlocked vs files, short read} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan puts $f abcdefghijklmnop
+    chan close $f
+    set f [open $path(test1) r]
+    lappend l [chan blocked $f]
+    lappend l [chan read $f 3]
+    lappend l [chan blocked $f]
+    lappend l [chan read -nonewline $f]
+    lappend l [chan blocked $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {0 abc 0 defghijklmnop 0 1}
+test chan-io-36.4 {Tcl_InputBlocked vs files, event driven read} -setup {
+    file delete $path(test1)
+    set l ""
+    variable x
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan puts $f abcdefghijklmnop
+    chan close $f
+    set f [open $path(test1) r]
+    chan event $f readable [namespace code {
+	lappend l [chan read $f 3]
+	if {[chan eof $f]} {lappend l eof; chan close $f; set x done}
+    }]
+    vwait [namespace which -variable x]
+    return $l
+} -result {abc def ghi jkl mno {p
+} eof}
+test chan-io-36.5 {Tcl_InputBlocked vs files, short read, nonblocking} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {nonBlockFiles} -body {
+    set f [open $path(test1) w]
+    chan puts $f abcdefghijklmnop
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -blocking off
+    lappend l [chan blocked $f]
+    lappend l [chan read $f 3]
+    lappend l [chan blocked $f]
+    lappend l [chan read -nonewline $f]
+    lappend l [chan blocked $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result {0 abc 0 defghijklmnop 0 1}
+test chan-io-36.6 {Tcl_InputBlocked vs files, event driven read} -setup {
+    file delete $path(test1)
+    set l ""
+    variable x
+} -constraints {nonBlockFiles fileevent} -body {
+    set f [open $path(test1) w]
+    chan puts $f abcdefghijklmnop
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -blocking off
+    chan event $f readable [namespace code {
+	lappend l [chan read $f 3]
+	if {[chan eof $f]} {lappend l eof; chan close $f; set x done}
+    }]
+    vwait [namespace which -variable x]
+    return $l
+} -result {abc def ghi jkl mno {p
+} eof}
+
+# Test Tcl_InputBuffered
+
+test chan-io-37.1 {Tcl_InputBuffered} -setup {
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(longfile) r]
+    chan configure $f -buffersize 4096
+    chan read $f 3
+    lappend l [testchannel inputbuffered $f]
+    lappend l [chan tell $f]
+} -cleanup {
+    chan close $f
+} -result {4093 3}
+test chan-io-37.2 {Tcl_InputBuffered, test input flushing on seek} -setup {
+    set l ""
+} -constraints {testchannel} -body {
+    set f [open $path(longfile) r]
+    chan configure $f -buffersize 4096
+    chan read $f 3
+    lappend l [testchannel inputbuffered $f]
+    lappend l [chan tell $f]
+    chan seek $f 0 current
+    lappend l [testchannel inputbuffered $f]
+    lappend l [chan tell $f]
+} -cleanup {
+    chan close $f
+} -result {4093 3 0 3}
+
+# Test Tcl_SetChannelBufferSize, Tcl_GetChannelBufferSize
+
+test chan-io-38.1 {Tcl_GetChannelBufferSize, default buffer size} -body {
+    set f [open $path(longfile) r]
+    chan configure $f -buffersize
+} -cleanup {
+    chan close $f
+} -result 4096
+test chan-io-38.2 {Tcl_SetChannelBufferSize, Tcl_GetChannelBufferSize} -setup {
+    set l ""
+} -body {
+    set f [open $path(longfile) r]
+    lappend l [chan configure $f -buffersize]
+    chan configure $f -buffersize 10000
+    lappend l [chan configure $f -buffersize]
+    chan configure $f -buffersize 1
+    lappend l [chan configure $f -buffersize]
+    chan configure $f -buffersize -1
+    lappend l [chan configure $f -buffersize]
+    chan configure $f -buffersize 0
+    lappend l [chan configure $f -buffersize]
+    chan configure $f -buffersize 100000
+    lappend l [chan configure $f -buffersize]
+    chan configure $f -buffersize 10000000
+    lappend l [chan configure $f -buffersize]
+} -cleanup {
+    chan close $f
+} -result {4096 10000 1 1 1 100000 1048576}
+test chan-io-38.3 {Tcl_SetChannelBufferSize, changing buffersize between reads} {
+    # This test crashes the interp if Bug #427196 is not fixed
+    set chan [open [info script] r]
+    chan configure $chan -buffersize 10
+    set var [chan read $chan 2]
+    chan configure $chan -buffersize 32
+    append var [chan read $chan]
+    chan close $chan
+} {}
+
+# Test Tcl_SetChannelOption, Tcl_GetChannelOption
+
+test chan-io-39.1 {Tcl_GetChannelOption} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -blocking
+} -cleanup {
+    chan close $f1
+} -result 1
+#
+# Test 17.2 was removed.
+#
+test chan-io-39.2 {Tcl_GetChannelOption} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -buffering
+} -cleanup {
+    chan close $f1
+} -result full
+test chan-io-39.3 {Tcl_GetChannelOption} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -buffering line
+    chan configure $f1 -buffering
+} -cleanup {
+    chan close $f1
+} -result line
+test chan-io-39.4 {Tcl_GetChannelOption, Tcl_SetChannelOption} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f1 [open $path(test1) w]
+    lappend l [chan configure $f1 -buffering]
+    chan configure $f1 -buffering line
+    lappend l [chan configure $f1 -buffering]
+    chan configure $f1 -buffering none
+    lappend l [chan configure $f1 -buffering]
+    chan configure $f1 -buffering line
+    lappend l [chan configure $f1 -buffering]
+    chan configure $f1 -buffering full
+    lappend l [chan configure $f1 -buffering]
+} -cleanup {
+    chan close $f1
+} -result {full line none line full}
+test chan-io-39.5 {Tcl_GetChannelOption, invariance} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f1 [open $path(test1) w]
+    lappend l [chan configure $f1 -buffering]
+    lappend l [list [catch {chan configure $f1 -buffering green} msg] $msg]
+    lappend l [chan configure $f1 -buffering]
+} -cleanup {
+    chan close $f1
+} -result {full {1 {bad value for -buffering: must be one of full, line, or none}} full}
+test chan-io-39.6 {Tcl_SetChannelOption, multiple options} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -buffering line
+    chan puts $f1 hello
+    chan puts $f1 bye
+    file size $path(test1)
+} -cleanup {
+    chan close $f1
+} -result 10
+test chan-io-39.7 {Tcl_SetChannelOption, buffering, translation} -setup {
+    file delete $path(test1)
+    set x ""
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf
+    chan puts $f1 hello
+    chan puts $f1 bye
+    chan configure $f1 -buffering line
+    lappend x [file size $path(test1)]
+    chan puts $f1 really_bye
+    lappend x [file size $path(test1)]
+} -cleanup {
+    chan close $f1
+} -result {0 21}
+test chan-io-39.8 {Tcl_SetChannelOption, different buffering options} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f1 [open $path(test1) w]
+    chan configure $f1 -translation lf -buffering none -eofchar {}
+    chan puts -nonewline $f1 hello
+    lappend l [file size $path(test1)]
+    chan puts -nonewline $f1 hello
+    lappend l [file size $path(test1)]
+    chan configure $f1 -buffering full
+    chan puts -nonewline $f1 hello
+    lappend l [file size $path(test1)]
+    chan configure $f1 -buffering none
+    lappend l [file size $path(test1)]
+    chan puts -nonewline $f1 hello
+    lappend l [file size $path(test1)]
+    chan close $f1
+    lappend l [file size $path(test1)]
+} -result {5 10 10 10 20 20}
+test chan-io-39.9 {Tcl_SetChannelOption, blocking mode} -setup {
+    file delete $path(test1)
+    set x ""
+} -constraints {nonBlockFiles} -body {
+    set f1 [open $path(test1) w]
+    chan close $f1
+    set f1 [open $path(test1) r]
+    lappend x [chan configure $f1 -blocking]
+    chan configure $f1 -blocking off
+    lappend x [chan configure $f1 -blocking]
+    lappend x [chan gets $f1]
+    lappend x [chan read $f1 1000]
+    lappend x [chan blocked $f1]
+    lappend x [chan eof $f1]
+} -cleanup {
+    chan close $f1
+} -result {1 0 {} {} 0 1}
+test chan-io-39.10 {Tcl_SetChannelOption, blocking mode} -setup {
+    file delete $path(pipe)
+    set x ""
+} -constraints {stdio openpipe} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {
+	chan gets stdin
+	after 100
+	chan puts hi
+	chan gets stdin
+    }
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    chan configure $f1 -blocking off -buffering line
+    lappend x [chan configure $f1 -blocking]
+    lappend x [chan gets $f1]
+    lappend x [chan blocked $f1]
+    chan configure $f1 -blocking on
+    chan puts $f1 hello
+    chan configure $f1 -blocking off
+    lappend x [chan gets $f1]
+    lappend x [chan blocked $f1]
+    chan configure $f1 -blocking on
+    chan puts $f1 bye
+    chan configure $f1 -blocking off
+    lappend x [chan gets $f1]
+    lappend x [chan blocked $f1]
+    chan configure $f1 -blocking on
+    lappend x [chan configure $f1 -blocking]
+    lappend x [chan gets $f1]
+    lappend x [chan blocked $f1]
+    lappend x [chan eof $f1]
+    lappend x [chan gets $f1]
+    lappend x [chan eof $f1]
+} -cleanup {
+    chan close $f1
+} -result {0 {} 1 {} 1 {} 1 1 hi 0 0 {} 1}
+test chan-io-39.11 {Tcl_SetChannelOption, Tcl_GetChannelOption, buffer size clipped to lower bound} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -buffersize -10
+    chan configure $f -buffersize
+} -cleanup {
+    chan close $f
+} -result 1
+test chan-io-39.12 {Tcl_SetChannelOption, Tcl_GetChannelOption buffer size clipped to upper bound} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -buffersize 10000000
+    chan configure $f -buffersize
+} -cleanup {
+    chan close $f
+} -result 1048576
+test chan-io-39.13 {Tcl_SetChannelOption, Tcl_GetChannelOption, buffer size} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -buffersize 40000
+    chan configure $f -buffersize
+} -cleanup {
+    chan close $f
+} -result 40000
+test chan-io-39.14 {Tcl_SetChannelOption: -encoding, binary & utf-8} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -encoding {} 
+    chan puts -nonewline $f \xe7\x89\xa6
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -encoding utf-8
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result \u7266
+test chan-io-39.15 {Tcl_SetChannelOption: -encoding, binary & utf-8} -setup {
+    file delete $path(test1)
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -encoding binary
+    chan puts -nonewline $f \xe7\x89\xa6
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -encoding utf-8
+    chan read $f
+} -cleanup {
+    chan close $f
+} -result \u7266
+test chan-io-39.16 {Tcl_SetChannelOption: -encoding, errors} -setup {
+    file delete $path(test1)
+    set f [open $path(test1) w]
+} -body {
+    chan configure $f -encoding foobar
+} -returnCodes error -cleanup {
+    chan close $f
+} -result {unknown encoding "foobar"}
+test chan-io-39.17 {Tcl_SetChannelOption: -encoding, clearing CHANNEL_NEED_MORE_DATA} -setup {
+    variable x {}
+} -constraints {stdio openpipe fileevent} -body {
+    set f [openpipe r+ $path(cat)]
+    chan configure $f -encoding binary
+    chan puts -nonewline $f "\xe7"
+    chan flush $f
+    chan configure $f -encoding utf-8 -blocking 0
+    chan event $f readable [namespace code { lappend x [chan read $f] }]
+    vwait [namespace which -variable x]
+    after 300 [namespace code { lappend x timeout }]
+    vwait [namespace which -variable x]
+    chan configure $f -encoding utf-8
+    vwait [namespace which -variable x]
+    after 300 [namespace code { lappend x timeout }]
+    vwait [namespace which -variable x]
+    chan configure $f -encoding binary
+    vwait [namespace which -variable x]
+    after 300 [namespace code { lappend x timeout }]
+    vwait [namespace which -variable x]
+    return $x
+} -cleanup {
+    chan close $f
+} -result "{} timeout {} timeout \xe7 timeout"
+test chan-io-39.18 {Tcl_SetChannelOption, setting read mode independently} \
+	-constraints {socket} -body {
+    proc accept {s a p} {chan close $s}
+    set s1 [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    set port [lindex [chan configure $s1 -sockname] 2]
+    set s2 [socket 127.0.0.1 $port]
+    update
+    chan configure $s2 -translation {auto lf}
+    chan configure $s2 -translation
+} -cleanup {
+    chan close $s1
+    chan close $s2
+} -result {auto lf}
+test chan-io-39.19 {Tcl_SetChannelOption, setting read mode independently} \
+	-constraints {socket} -body {
+    proc accept {s a p} {chan close $s}
+    set s1 [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    set port [lindex [chan configure $s1 -sockname] 2]
+    set s2 [socket 127.0.0.1 $port]
+    update
+    chan configure $s2 -translation {auto crlf}
+    chan configure $s2 -translation
+} -cleanup {
+    chan close $s1
+    chan close $s2
+} -result {auto crlf}
+test chan-io-39.20 {Tcl_SetChannelOption, setting read mode independently} \
+	-constraints {socket} -body {
+    proc accept {s a p} {chan close $s}
+    set s1 [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    set port [lindex [chan configure $s1 -sockname] 2]
+    set s2 [socket 127.0.0.1 $port]
+    update
+    chan configure $s2 -translation {auto cr}
+    chan configure $s2 -translation
+} -cleanup {
+    chan close $s1
+    chan close $s2
+} -result {auto cr}
+test chan-io-39.21 {Tcl_SetChannelOption, setting read mode independently} \
+	-constraints {socket} -body {
+    proc accept {s a p} {chan close $s}
+    set s1 [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    set port [lindex [chan configure $s1 -sockname] 2]
+    set s2 [socket 127.0.0.1 $port]
+    update
+    chan configure $s2 -translation {auto auto}
+    chan configure $s2 -translation
+} -cleanup {
+    chan close $s1
+    chan close $s2
+} -result {auto crlf}
+test chan-io-39.22 {Tcl_SetChannelOption, invariance} -setup {
+    file delete $path(test1)
+    set l ""
+} -constraints {unix} -body {
+    set f1 [open $path(test1) w+]
+    lappend l [chan configure $f1 -eofchar]
+    chan configure $f1 -eofchar {ON GO}
+    lappend l [chan configure $f1 -eofchar]
+    chan configure $f1 -eofchar D
+    lappend l [chan configure $f1 -eofchar]
+} -cleanup {
+    chan close $f1
+} -result {{{} {}} {O G} {D D}}
+test chan-io-39.22a {Tcl_SetChannelOption, invariance} -setup {
+    file delete $path(test1)
+    set l [list]
+} -body {
+    set f1 [open $path(test1) w+]
+    chan configure $f1 -eofchar {ON GO}
+    lappend l [chan configure $f1 -eofchar]
+    chan configure $f1 -eofchar D
+    lappend l [chan configure $f1 -eofchar]
+    lappend l [list [catch {chan configure $f1 -eofchar {1 2 3}} msg] $msg]
+} -cleanup {
+    chan close $f1
+} -result {{O G} {D D} {1 {bad value for -eofchar: should be a list of zero, one, or two elements}}}
+test chan-io-39.23 {Tcl_GetChannelOption, server socket is not readable or\
+        writeable, it should still have valid -eofchar and -translation options} -setup {
+    set l [list]
+} -body {
+    set sock [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    lappend l [chan configure $sock -eofchar] \
+	[chan configure $sock -translation]
+} -cleanup {
+    chan close $sock
+} -result {{{}} auto}
+test chan-io-39.24 {Tcl_SetChannelOption, server socket is not readable or\
+        writable so we can't change -eofchar or -translation} -setup {
+    set l [list]
+} -body { 
+    set sock [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    chan configure $sock -eofchar D -translation lf
+    lappend l [chan configure $sock -eofchar] \
+	[chan configure $sock -translation]
+} -cleanup {
+    chan close $sock
+} -result {{{}} auto}
+
+test chan-io-40.1 {POSIX open access modes: RDWR} -setup {
+    file delete $path(test3)
+} -body {
+    set f [open $path(test3) w]
+    chan puts $f xyzzy
+    chan close $f
+    set f [open $path(test3) RDWR]
+    chan puts -nonewline $f "ab"
+    chan seek $f 0 current
+    set x [chan gets $f]
+    chan close $f
+    set f [open $path(test3) r]
+    lappend x [chan gets $f]
+} -cleanup {
+    chan close $f
+} -result {zzy abzzy}
+test chan-io-40.2 {POSIX open access modes: CREAT} -setup {
+    file delete $path(test3)
+} -constraints {unix} -body {
+    set f [open $path(test3) {WRONLY CREAT} 0600]
+    file stat $path(test3) stats
+    set x [format "0%o" [expr $stats(mode)&0o777]]
+    chan puts $f "line 1"
+    chan close $f
+    set f [open $path(test3) r]
+    lappend x [chan gets $f]
+} -cleanup {
+    chan close $f
+} -result {0600 {line 1}}
+test chan-io-40.3 {POSIX open access modes: CREAT} -setup {
+    file delete $path(test3)
+} -constraints {unix umask} -body {
+    # This test only works if your umask is 2, like ouster's.
+    chan close [open $path(test3) {WRONLY CREAT}]
+    file stat $path(test3) stats
+    format "0%o" [expr $stats(mode)&0o777]
+} -result [format %04o [expr {0o666 & ~ $umaskValue}]]
+test chan-io-40.4 {POSIX open access modes: CREAT} -setup {
+    file delete $path(test3)
+} -body {
+    set f [open $path(test3) w]
+    chan configure $f -eofchar {}
+    chan puts $f xyzzy
+    chan close $f
+    set f [open $path(test3) {WRONLY CREAT}]
+    chan configure $f -eofchar {}
+    chan puts -nonewline $f "ab"
+    chan close $f
+    set f [open $path(test3) r]
+    chan gets $f
+} -cleanup {
+    chan close $f
+} -result abzzy
+test chan-io-40.5 {POSIX open access modes: APPEND} -setup {
+    file delete $path(test3)
+    set x ""
+} -body {
+    set f [open $path(test3) w]
+    chan configure $f -translation lf -eofchar {}
+    chan puts $f xyzzy
+    chan close $f
+    set f [open $path(test3) {WRONLY APPEND}]
+    chan configure $f -translation lf
+    chan puts $f "new line"
+    chan seek $f 0
+    chan puts $f "abc"
+    chan close $f
+    set f [open $path(test3) r]
+    chan configure $f -translation lf
+    chan seek $f 6 current
+    lappend x [chan gets $f]
+    lappend x [chan gets $f]
+} -cleanup {
+    chan close $f
+} -result {{new line} abc}
+test chan-io-40.6 {POSIX open access modes: EXCL} -match regexp -setup {
+    file delete $path(test3)
+} -body {
+    set f [open $path(test3) w]
+    chan puts $f xyzzy
+    chan close $f
+    open $path(test3) {WRONLY CREAT EXCL}
+} -returnCodes error -result {(?i)couldn't open ".*test3": file (already )?exists}
+test chan-io-40.7 {POSIX open access modes: EXCL} -setup {
+    file delete $path(test3)
+} -body {
+    set f [open $path(test3) {WRONLY CREAT EXCL}]
+    chan configure $f -eofchar {}
+    chan puts $f "A test line"
+    chan close $f
+    viewFile test3
+} -result {A test line}
+test chan-io-40.8 {POSIX open access modes: TRUNC} -setup {
+    file delete $path(test3)
+} -body {
+    set f [open $path(test3) w]
+    chan puts $f xyzzy
+    chan close $f
+    set f [open $path(test3) {WRONLY TRUNC}]
+    chan puts $f abc
+    chan close $f
+    set f [open $path(test3) r]
+    chan gets $f
+} -cleanup {
+    chan close $f
+} -result abc
+test chan-io-40.9 {POSIX open access modes: NONBLOCK} -setup {
+    file delete $path(test3)
+} -constraints {nonPortable unix} -body {
+    set f [open $path(test3) {WRONLY NONBLOCK CREAT}]
+    chan puts $f "NONBLOCK test"
+    chan close $f
+    set f [open $path(test3) r]
+    chan gets $f
+} -cleanup {
+    chan close $f
+} -result {NONBLOCK test}
+test chan-io-40.10 {POSIX open access modes: RDONLY} -body {
+    set f [open $path(test1) w]
+    chan puts $f "two lines: this one"
+    chan puts $f "and this"
+    chan close $f
+    set f [open $path(test1) RDONLY]
+    list [chan gets $f] [catch {chan puts $f Test} msg] $msg
+} -cleanup {
+    chan close $f
+} -match glob -result {{two lines: this one} 1 {channel "*" wasn't opened for writing}}
+test chan-io-40.11 {POSIX open access modes: RDONLY} -match regexp -body {
+    file delete $path(test3)
+    open $path(test3) RDONLY
+} -returnCodes error -result {(?i)couldn't open ".*test3": no such file or directory}
+test chan-io-40.12 {POSIX open access modes: WRONLY} -match regexp -body {
+    file delete $path(test3)
+    open $path(test3) WRONLY
+} -returnCodes error -result {(?i)couldn't open ".*test3": no such file or directory}
+test chan-io-40.13 {POSIX open access modes: WRONLY} -body {
+    makeFile xyzzy test3
+    set f [open $path(test3) WRONLY]
+    chan configure $f -eofchar {}
+    chan puts -nonewline $f "ab"
+    chan seek $f 0 current
+    set x [list [catch {chan gets $f} msg] $msg]
+    chan close $f
+    lappend x [viewFile test3]
+} -match glob -result {1 {channel "*" wasn't opened for reading} abzzy} 
+test chan-io-40.14 {POSIX open access modes: RDWR} -match regexp -body {
+    file delete $path(test3)
+    open $path(test3) RDWR
+} -returnCodes error -result {(?i)couldn't open ".*test3": no such file or directory}
+test chan-io-40.15 {POSIX open access modes: RDWR} {
+    makeFile xyzzy test3
+    set f [open $path(test3) RDWR]
+    chan puts -nonewline $f "ab"
+    chan seek $f 0 current
+    set x [chan gets $f]
+    chan close $f
+    lappend x [viewFile test3]
+} {zzy abzzy}
+test chan-io-40.16 {tilde substitution in open} -constraints makeFileInHome -setup {
+    makeFile {Some text} _test_ ~
+} -body {
+    file exists [file join $::env(HOME) _test_]
+} -cleanup {
+    removeFile _test_ ~
+} -result 1
+test chan-io-40.17 {tilde substitution in open} -setup {
+    set home $::env(HOME)
+} -body {
+    unset ::env(HOME)
+    open ~/foo
+} -returnCodes error -cleanup {
+    set ::env(HOME) $home
+} -result {couldn't find HOME environment variable to expand path}
+
+test chan-io-41.1 {Tcl_FileeventCmd: errors} -constraints fileevent -body {
+    chan event foo
+} -returnCodes error -result {wrong # args: should be "chan event channelId event ?script?"}
+test chan-io-41.2 {Tcl_FileeventCmd: errors} -constraints fileevent -body {
+    chan event foo bar baz q
+} -returnCodes error -result {wrong # args: should be "chan event channelId event ?script?"}
+test chan-io-41.3 {Tcl_FileeventCmd: errors} -constraints fileevent -body {
+    chan event gorp readable
+} -returnCodes error -result {can not find channel named "gorp"}
+test chan-io-41.4 {Tcl_FileeventCmd: errors} -constraints fileevent -body {
+    chan event gorp writable
+} -returnCodes error -result {can not find channel named "gorp"}
+test chan-io-41.5 {Tcl_FileeventCmd: errors} -constraints fileevent -body {
+    chan event gorp who-knows
+} -returnCodes error -result {bad event name "who-knows": must be readable or writable}
+
+#
+# Test chan event on a file
+#
+
+set path(foo) [makeFile {} foo]
+set f [open $path(foo) w+]
+
+test chan-io-42.1 {Tcl_FileeventCmd: creating, deleting, querying} {fileevent} {
+    list [chan event $f readable] [chan event $f writable]
+} {{} {}}
+test chan-io-42.2 {Tcl_FileeventCmd: replacing} {fileevent} {
+    set result {}
+    chan event $f r "first script"
+    lappend result [chan event $f readable]
+    chan event $f r "new script"
+    lappend result [chan event $f readable]
+    chan event $f r "yet another"
+    lappend result [chan event $f readable]
+    chan event $f r ""
+    lappend result [chan event $f readable]
+} {{first script} {new script} {yet another} {}}
+test chan-io-42.3 {Tcl_FileeventCmd: replacing, with NULL chars in script} {fileevent} {
+    set result {}
+    chan event $f r "first scr\0ipt"
+    lappend result [string length [chan event $f readable]]
+    chan event $f r "new scr\0ipt"
+    lappend result [string length [chan event $f readable]]
+    chan event $f r "yet ano\0ther"
+    lappend result [string length [chan event $f readable]]
+    chan event $f r ""
+    lappend result [chan event $f readable]
+} {13 11 12 {}}
+
+test chan-io-43.1 {Tcl_FileeventCmd: creating, deleting, querying} {stdio unixExecs fileevent} {
+    set result {}
+    chan event $f readable "script 1"
+    lappend result [chan event $f readable] [chan event $f writable]
+    chan event $f writable "write script"
+    lappend result [chan event $f readable] [chan event $f writable]
+    chan event $f readable {}
+    lappend result [chan event $f readable] [chan event $f writable]
+    chan event $f writable {}
+    lappend result [chan event $f readable] [chan event $f writable]
+} {{script 1} {} {script 1} {write script} {} {write script} {} {}}
+test chan-io-43.2 {Tcl_FileeventCmd: deleting when many present} -setup {
+    set f2 [open "|[list cat -u]" r+]
+    set f3 [open "|[list cat -u]" r+]
+    set result {}
+} -constraints {stdio unixExecs fileevent openpipe} -body {
+    lappend result [chan event $f r] [chan event $f2 r] [chan event $f3 r]
+    chan event $f r "chan read f"
+    chan event $f2 r "chan read f2"
+    chan event $f3 r "chan read f3"
+    lappend result [chan event $f r] [chan event $f2 r] [chan event $f3 r]
+    chan event $f2 r {}
+    lappend result [chan event $f r] [chan event $f2 r] [chan event $f3 r]
+    chan event $f3 r {}
+    lappend result [chan event $f r] [chan event $f2 r] [chan event $f3 r]
+    chan event $f r {}
+    lappend result [chan event $f r] [chan event $f2 r] [chan event $f3 r]
+} -cleanup {
+    catch {chan close $f2}
+    catch {chan close $f3}
+} -result {{} {} {} {chan read f} {chan read f2} {chan read f3} {chan read f} {} {chan read f3} {chan read f} {} {} {} {} {}}
+
+test chan-io-44.1 {FileEventProc procedure: normal read event} -setup {
+    set f2 [open "|[list cat -u]" r+]
+    set f3 [open "|[list cat -u]" r+]
+} -constraints {stdio unixExecs fileevent openpipe} -body {
+    chan event $f2 readable [namespace code {
+	set x [chan gets $f2]; chan event $f2 readable {}
+    }]
+    chan puts $f2 text; chan flush $f2
+    variable x initial
+    vwait [namespace which -variable x]
+    return $x
+} -cleanup {
+    catch {chan close $f2}
+    catch {chan close $f3}
+} -result {text}
+test chan-io-44.2 {FileEventProc procedure: error in read event} -setup {
+    set f2 [open "|[list cat -u]" r+]
+    set f3 [open "|[list cat -u]" r+]
+    proc myHandler {msg options} {
+	variable x $msg
+    }
+    set handler [interp bgerror {}]
+    interp bgerror {} [namespace which myHandler]
+} -constraints {stdio unixExecs fileevent openpipe} -body {
+    chan event $f2 readable {error bogus}
+    chan puts $f2 text; chan flush $f2
+    variable x initial
+    vwait [namespace which -variable x]
+    list $x [chan event $f2 readable]
+} -cleanup {
+    interp bgerror {} $handler
+    catch {chan close $f2}
+    catch {chan close $f3}
+} -result {bogus {}}
+test chan-io-44.3 {FileEventProc procedure: normal write event} -setup {
+    set f2 [open "|[list cat -u]" r+]
+    set f3 [open "|[list cat -u]" r+]
+} -constraints {stdio unixExecs fileevent openpipe} -body {
+    chan event $f2 writable [namespace code {
+	lappend x "triggered"
+	incr count -1
+	if {$count <= 0} {
+	    chan event $f2 writable {}
+	}
+    }]
+    variable x initial
+    set count 3
+    vwait [namespace which -variable x]
+    vwait [namespace which -variable x]
+    vwait [namespace which -variable x]
+    return $x
+} -cleanup {
+    catch {chan close $f2}
+    catch {chan close $f3}
+} -result {initial triggered triggered triggered}
+test chan-io-44.4 {FileEventProc procedure: eror in write event} -setup {
+    set f2 [open "|[list cat -u]" r+]
+    set f3 [open "|[list cat -u]" r+]
+    proc myHandler {msg options} {
+	variable x $msg
+    }
+    set handler [interp bgerror {}]
+    interp bgerror {} [namespace which myHandler]
+} -constraints {stdio unixExecs fileevent openpipe} -body {
+    chan event $f2 writable {error bad-write}
+    variable x initial
+    vwait [namespace which -variable x]
+    list $x [chan event $f2 writable]
+} -cleanup {
+    interp bgerror {} $handler
+    catch {chan close $f2}
+    catch {chan close $f3}
+} -result {bad-write {}}
+test chan-io-44.5 {FileEventProc procedure: end of file} {stdio unixExecs openpipe fileevent} {
+    set f4 [openpipe r $path(cat) << foo]
+    chan event $f4 readable [namespace code {
+	if {[chan gets $f4 line] < 0} {
+	    lappend x eof
+	    chan event $f4 readable {}
+	} else {
+	    lappend x $line
+	}
+    }]
+    variable x initial
+    vwait [namespace which -variable x]
+    vwait [namespace which -variable x]
+    chan close $f4
+    set x
+} {initial foo eof}
+
+chan close $f
+makeFile "foo bar" foo
+
+test chan-io-45.1 {DeleteFileEvent, cleanup on chan close} {fileevent} {
+    set f [open $path(foo) r]
+    chan event $f readable [namespace code {
+	lappend x "binding triggered: \"[chan gets $f]\""
+	chan event $f readable {}
+    }]
+    chan close $f
+    set x initial
+    after 100 [namespace code {
+	set y done
+    }]
+    variable y
+    vwait [namespace which -variable y]
+    set x
+} {initial}
+test chan-io-45.2 {DeleteFileEvent, cleanup on chan close} {fileevent} {
+    set f  [open $path(foo) r]
+    set f2 [open $path(foo) r]
+    chan event $f readable [namespace code {
+	lappend x "f triggered: \"[chan gets $f]\""
+	chan event $f readable {}
+    }]
+    chan event $f2 readable [namespace code {
+	lappend x "f2 triggered: \"[chan gets $f2]\""
+	chan event $f2 readable {}
+    }]
+    chan close $f
+    variable x initial
+    vwait [namespace which -variable x]
+    chan close $f2
+    set x
+} {initial {f2 triggered: "foo bar"}}
+test chan-io-45.3 {DeleteFileEvent, cleanup on chan close} {fileevent} {
+    set f  [open $path(foo) r]
+    set f2 [open $path(foo) r]
+    set f3 [open $path(foo) r]
+    chan event $f readable {f script}
+    chan event $f2 readable {f2 script}
+    chan event $f3 readable {f3 script}
+    set x {}
+    chan close $f2
+    lappend x [catch {chan event $f readable} msg] $msg \
+	    [catch {chan event $f2 readable}] \
+	    [catch {chan event $f3 readable} msg] $msg
+    chan close $f3
+    lappend x [catch {chan event $f readable} msg] $msg \
+	    [catch {chan event $f2 readable}] \
+	    [catch {chan event $f3 readable}]
+    chan close $f
+    lappend x [catch {chan event $f readable}] \
+	    [catch {chan event $f2 readable}] \
+	    [catch {chan event $f3 readable}]
+} {0 {f script} 1 0 {f3 script} 0 {f script} 1 1 1 1 1}
+
+# Execute these tests only if the "testfevent" command is present.
+
+test chan-io-46.1 {Tcl event loop vs multiple interpreters} {testfevent fileevent} {
+    testfevent create
+    set script "set f \[[list open $path(foo) r]]\n"
+    append script {
+	set x "no event"
+	chan event $f readable [namespace code {
+	    set x "f triggered: [chan gets $f]"
+	    chan event $f readable {}
+	}]
+    }
+    testfevent cmd $script
+    after 1	;# We must delay because Windows takes a little time to notice
+    update
+    testfevent cmd {chan close $f}
+    list [testfevent cmd {set x}] [testfevent cmd {info commands after}]
+} {{f triggered: foo bar} after}
+test chan-io-46.2 {Tcl event loop vs multiple interpreters} testfevent {
+    testfevent create
+    testfevent cmd {
+        variable x 0
+        after 100 {set x triggered}
+        vwait [namespace which -variable x]
+        set x
+    }
+} {triggered}
+test chan-io-46.3 {Tcl event loop vs multiple interpreters} testfevent {
+    testfevent create
+    testfevent cmd {
+        set x 0
+        after 10 {lappend x timer}
+        after 30
+        set result $x
+        update idletasks
+        lappend result $x
+        update
+        lappend result $x
+    }
+} {0 0 {0 timer}}
+
+test chan-io-47.1 {chan event vs multiple interpreters} -setup {
+    set f  [open $path(foo) r]
+    set f2 [open $path(foo) r]
+    set f3 [open $path(foo) r]
+    set x {}
+} -constraints {testfevent fileevent} -body {
+    chan event $f readable {script 1}
+    testfevent create
+    testfevent share $f2
+    testfevent cmd "chan event $f2 readable {script 2}"
+    chan event $f3 readable {sript 3}
+    lappend x [chan event $f2 readable]
+    testfevent delete
+    lappend x [chan event $f readable] [chan event $f2 readable] \
+        [chan event $f3 readable]
+} -cleanup {
+    chan close $f
+    chan close $f2
+    chan close $f3
+} -result {{} {script 1} {} {sript 3}}
+test chan-io-47.2 {deleting chan event on interpreter delete} -setup {
+    set f  [open $path(foo) r]
+    set f2 [open $path(foo) r]
+    set f3 [open $path(foo) r]
+    set f4 [open $path(foo) r]
+} -constraints {testfevent fileevent} -body {
+    chan event $f readable {script 1}
+    testfevent create
+    testfevent share $f2
+    testfevent share $f3
+    testfevent cmd "chan event $f2 readable {script 2}
+        chan event $f3 readable {script 3}"
+    chan event $f4 readable {script 4}
+    testfevent delete
+    list [chan event $f readable] [chan event $f2 readable] \
+	[chan event $f3 readable] [chan event $f4 readable]
+} -cleanup {
+    chan close $f
+    chan close $f2
+    chan close $f3
+    chan close $f4
+} -result {{script 1} {} {} {script 4}}
+test chan-io-47.3 {deleting chan event on interpreter delete} -setup {
+    set f  [open $path(foo) r]
+    set f2 [open $path(foo) r]
+    set f3 [open $path(foo) r]
+    set f4 [open $path(foo) r]
+} -constraints {testfevent fileevent} -body {
+    testfevent create
+    testfevent share $f3
+    testfevent share $f4
+    chan event $f readable {script 1}
+    chan event $f2 readable {script 2}
+    testfevent cmd "chan event $f3 readable {script 3}
+      chan event $f4 readable {script 4}"
+    testfevent delete
+    list [chan event $f readable] [chan event $f2 readable] \
+	[chan event $f3 readable] [chan event $f4 readable]
+} -cleanup {
+    chan close $f
+    chan close $f2
+    chan close $f3
+    chan close $f4
+} -result {{script 1} {script 2} {} {}}
+test chan-io-47.4 {file events on shared files and multiple interpreters} -setup {
+    set f  [open $path(foo) r]
+    set f2 [open $path(foo) r]
+} -constraints {testfevent fileevent} -body {
+    testfevent create
+    testfevent share $f
+    testfevent cmd "chan event $f readable {script 1}"
+    chan event $f readable {script 2}
+    chan event $f2 readable {script 3}
+    list [chan event $f2 readable] [testfevent cmd "chan event $f readable"] \
+	[chan event $f readable]
+} -cleanup {
+    testfevent delete
+    chan close $f
+    chan close $f2
+} -result {{script 3} {script 1} {script 2}}
+test chan-io-47.5 {file events on shared files, deleting file events} -setup {
+    set f [open $path(foo) r]
+} -body {
+    testfevent create
+    testfevent share $f
+    testfevent cmd "chan event $f readable {script 1}"
+    chan event $f readable {script 2}
+    testfevent cmd "chan event $f readable {}"
+    list [testfevent cmd "chan event $f readable"] [chan event $f readable]
+} -constraints {testfevent fileevent} -cleanup {
+    testfevent delete
+    chan close $f
+} -result {{} {script 2}}
+test chan-io-47.6 {file events on shared files, deleting file events} -setup {
+    set f [open $path(foo) r]
+} -body {
+    testfevent create
+    testfevent share $f
+    testfevent cmd "chan event $f readable {script 1}"
+    chan event $f readable {script 2}
+    chan event $f readable {}
+    list [testfevent cmd "chan event $f readable"] [chan event $f readable]
+} -constraints {testfevent fileevent} -cleanup {
+    testfevent delete
+    chan close $f
+} -result {{script 1} {}}
+
+set path(bar) [makeFile {} bar]
+
+test chan-io-48.1 {testing readability conditions} {fileevent} {
+    set f [open $path(bar) w]
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan close $f
+    set f [open $path(bar) r]
+    chan event $f readable [namespace code {
+	lappend l called
+	if {[chan eof $f]} {
+	    chan close $f
+	    set x done
+	} else {
+	    chan gets $f
+	}
+    }]
+    set l ""
+    variable x not_done
+    vwait [namespace which -variable x]
+    list $x $l
+} {done {called called called called called called called}}
+test chan-io-48.2 {testing readability conditions} {nonBlockFiles fileevent} {
+    set f [open $path(bar) w]
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan close $f
+    set f [open $path(bar) r]
+    chan event $f readable [namespace code {
+	lappend l called
+	if {[chan eof $f]} {
+	    chan close $f
+	    set x done
+	} else {
+	    chan gets $f
+	}
+    }]
+    chan configure $f -blocking off
+    set l ""
+    variable x not_done
+    vwait [namespace which -variable x]
+    list $x $l
+} {done {called called called called called called called}}
+set path(my_script) [makeFile {} my_script]
+test chan-io-48.3 {testing readability conditions} -setup {
+    set l ""
+} -constraints {stdio unix nonBlockFiles openpipe fileevent} -body {
+    set f [open $path(bar) w]
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan puts $f abcdefg
+    chan close $f
+    set f [open $path(my_script) w]
+    chan puts $f {
+	proc copy_slowly {f} {
+	    while {![chan eof $f]} {
+		chan puts [chan gets $f]
+		after 200
+	    }
+	    chan close $f
+	}
+    }
+    chan close $f
+    set f [openpipe]
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	    set x done
+	} else {
+	    chan gets $f
+	    lappend l [chan blocked $f]
+	    chan gets $f
+	    lappend l [chan blocked $f]
+	}
+    }]
+    chan configure $f -buffering line
+    chan configure $f -blocking off
+    variable x not_done
+    chan puts $f [list source $path(my_script)]
+    chan puts $f "set f \[[list open $path(bar) r]]"
+    chan puts $f {copy_slowly $f}
+    chan puts $f {exit}
+    vwait [namespace which -variable x]
+    list $x $l
+} -cleanup {
+    chan close $f
+} -result {done {0 1 0 1 0 1 0 1 0 1 0 1 0 0}}
+test chan-io-48.4 {lf write, testing readability, ^Z termination, auto read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f [format "abc\ndef\n%c" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+test chan-io-48.5 {lf write, testing readability, ^Z in middle, auto read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f [format "abc\ndef\n%cfoo\nbar\n" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation auto
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+test chan-io-48.6 {cr write, testing readability, ^Z termination, auto read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts -nonewline $f [format "abc\ndef\n%c" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+test chan-io-48.7 {cr write, testing readability, ^Z in middle, auto read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts -nonewline $f [format "abc\ndef\n%cfoo\nbar\n" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation auto
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+test chan-io-48.8 {crlf write, testing readability, ^Z termination, auto read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts -nonewline $f [format "abc\ndef\n%c" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation auto -eofchar \x1a
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+test chan-io-48.9 {crlf write, testing readability, ^Z in middle, auto read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts -nonewline $f [format "abc\ndef\n%cfoo\nbar\n" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation auto
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+test chan-io-48.10 {lf write, testing readability, ^Z in middle, lf read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f [format "abc\ndef\n%cfoo\nbar\n" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation lf
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+test chan-io-48.11 {lf write, testing readability, ^Z termination, lf read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f [format "abc\ndef\n%c" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation lf -eofchar \x1a
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+test chan-io-48.12 {cr write, testing readability, ^Z in middle, cr read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts -nonewline $f [format "abc\ndef\n%cfoo\nbar\n" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation cr
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+test chan-io-48.13 {cr write, testing readability, ^Z termination, cr read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation cr
+    chan puts -nonewline $f [format "abc\ndef\n%c" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation cr -eofchar \x1a
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+test chan-io-48.14 {crlf write, testing readability, ^Z in middle, crlf read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts -nonewline $f [format "abc\ndef\n%cfoo\nbar\n" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -eofchar \x1a -translation crlf
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+test chan-io-48.15 {crlf write, testing readability, ^Z termi, crlf read mode} -setup {
+    file delete $path(test1)
+    set c 0
+    set l ""
+} -constraints {fileevent} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation crlf
+    chan puts -nonewline $f [format "abc\ndef\n%c" 26]
+    chan close $f
+    set f [open $path(test1) r]
+    chan configure $f -translation crlf -eofchar \x1a
+    chan event $f readable [namespace code {
+	if {[chan eof $f]} {
+	   set x done
+	   chan close $f
+	} else {
+	   lappend l [chan gets $f]
+	   incr c
+	}
+    }]
+    variable x
+    vwait [namespace which -variable x]
+    list $c $l
+} -result {3 {abc def {}}}
+
+test chan-io-49.1 {testing crlf reading, leftover cr disgorgment} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "a\rb\rc\r\n"
+    chan close $f
+    set f [open $path(test1) r]
+    lappend l [file size $path(test1)]
+    chan configure $f -translation crlf
+    lappend l [chan read $f 1]
+    lappend l [chan tell $f]
+    lappend l [chan read $f 1]
+    lappend l [chan tell $f]
+    lappend l [chan read $f 1]
+    lappend l [chan tell $f]
+    lappend l [chan read $f 1]
+    lappend l [chan tell $f]
+    lappend l [chan read $f 1]
+    lappend l [chan tell $f]
+    lappend l [chan read $f 1]
+    lappend l [chan tell $f]
+    lappend l [chan eof $f]
+    lappend l [chan read $f 1]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result "7 a 1 [list \r] 2 b 3 [list \r] 4 c 5 {
+} 7 0 {} 1"
+test chan-io-49.2 {testing crlf reading, leftover cr disgorgment} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "a\rb\rc\r\n"
+    chan close $f
+    set f [open $path(test1) r]
+    lappend l [file size $path(test1)]
+    chan configure $f -translation crlf
+    lappend l [chan read $f 2]
+    lappend l [chan tell $f]
+    lappend l [chan read $f 2]
+    lappend l [chan tell $f]
+    lappend l [chan read $f 2]
+    lappend l [chan tell $f]
+    lappend l [chan eof $f]
+    lappend l [chan read $f 2]
+    lappend l [chan tell $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result "7 [list a\r] 2 [list b\r] 4 [list c\n] 7 0 {} 7 1"
+test chan-io-49.3 {testing crlf reading, leftover cr disgorgment} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "a\rb\rc\r\n"
+    chan close $f
+    set f [open $path(test1) r]
+    lappend l [file size $path(test1)]
+    chan configure $f -translation crlf
+    lappend l [chan read $f 3]
+    lappend l [chan tell $f]
+    lappend l [chan read $f 3]
+    lappend l [chan tell $f]
+    lappend l [chan eof $f]
+    lappend l [chan read $f 3]
+    lappend l [chan tell $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result "7 [list a\rb] 3 [list \rc\n] 7 0 {} 7 1"
+test chan-io-49.4 {testing crlf reading, leftover cr disgorgment} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "a\rb\rc\r\n"
+    chan close $f
+    set f [open $path(test1) r]
+    lappend l [file size $path(test1)]
+    chan configure $f -translation crlf
+    lappend l [chan read $f 3]
+    lappend l [chan tell $f]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan eof $f]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result "7 [list a\rb] 3 [list \rc] 7 0 {} 7 1"
+test chan-io-49.5 {testing crlf reading, leftover cr disgorgment} -setup {
+    file delete $path(test1)
+    set l ""
+} -body {
+    set f [open $path(test1) w]
+    chan configure $f -translation lf
+    chan puts -nonewline $f "a\rb\rc\r\n"
+    chan close $f
+    set f [open $path(test1) r]
+    lappend l [file size $path(test1)]
+    chan configure $f -translation crlf
+    lappend l [set x [chan gets $f]]
+    lappend l [chan tell $f]
+    lappend l [chan gets $f]
+    lappend l [chan tell $f]
+    lappend l [chan eof $f]
+} -cleanup {
+    chan close $f
+} -result [list 7 a\rb\rc 7 {} 7 1]
+
+test chan-io-50.1 {testing handler deletion} -setup {
+    file delete $path(test1)
+} -constraints {testchannelevent} -body {
+    set f [open $path(test1) w]
+    chan close $f
+    set f [open $path(test1) r]
+    testchannelevent $f add readable [namespace code {
+	variable z called
+	testchannelevent $f delete 0
+    }]
+    variable z not_called
+    update
+    return $z
+} -cleanup {
+    chan close $f
+} -result called
+test chan-io-50.2 {testing handler deletion with multiple handlers} -setup {
+    file delete $path(test1)
+    chan close [open $path(test1) w]
+    set z ""
+} -constraints {testchannelevent} -body {
+    set f [open $path(test1) r]
+    testchannelevent $f add readable [namespace code [list delhandler $f 1]]
+    testchannelevent $f add readable [namespace code [list delhandler $f 0]]
+    proc delhandler {f i} {
+	variable z
+	lappend z "called delhandler $f $i"
+	testchannelevent $f delete 0
+    }
+    update
+    string equal $z \
+	[list [list called delhandler $f 0] [list called delhandler $f 1]]
+} -cleanup {
+    chan close $f
+} -result 1
+test chan-io-50.3 {testing handler deletion with multiple handlers} -setup {
+    file delete $path(test1)
+    chan close [open $path(test1) w]
+    set z ""
+} -constraints {testchannelevent} -body {
+    set f [open $path(test1) r]
+    testchannelevent $f add readable [namespace code [list notcalled $f 1]]
+    testchannelevent $f add readable [namespace code [list delhandler $f 0]]
+    proc notcalled {f i} {
+	variable z
+	lappend z "notcalled was called!! $f $i"
+    }
+    proc delhandler {f i} {
+	variable z
+	testchannelevent $f delete 1
+	lappend z "delhandler $f $i called"
+	testchannelevent $f delete 0
+	lappend z "delhandler $f $i deleted myself"
+    }
+    update
+    string equal $z \
+	[list [list delhandler $f 0 called] \
+	      [list delhandler $f 0 deleted myself]]
+} -cleanup {
+    chan close $f
+} -result 1
+test chan-io-50.4 {testing handler deletion vs reentrant calls} -setup {
+    file delete $path(test1)
+    set f [open $path(test1) w]
+    chan close $f
+} -constraints {testchannelevent} -body {
+    set f [open $path(test1) r]
+    testchannelevent $f add readable [namespace code {
+	if {$u eq "recursive"} {
+	    testchannelevent $f delete 0
+	    lappend z "delrecursive deleting recursive"
+	} else {
+	    lappend z "delrecursive calling recursive"
+	    set u recursive
+	    update
+	}
+    }]
+    variable u toplevel
+    variable z ""
+    update
+    return $z
+} -cleanup {
+    chan close $f
+} -result {{delrecursive calling recursive} {delrecursive deleting recursive}}
+test chan-io-50.5 {testing handler deletion vs reentrant calls} -setup {
+    file delete $path(test1)
+    set f [open $path(test1) w]
+    chan close $f
+} -constraints {testchannelevent} -body {
+    set f [open $path(test1) r]
+    testchannelevent $f add readable [namespace code [list notcalled $f]]
+    testchannelevent $f add readable [namespace code [list del $f]]
+    proc notcalled {f} {
+	variable z
+	lappend z "notcalled was called!! $f"
+    }
+    proc del {f} {
+	variable u
+	variable z
+	if {$u eq "recursive"} {
+	    testchannelevent $f delete 1
+	    testchannelevent $f delete 0
+	    lappend z "del deleted notcalled"
+	    lappend z "del deleted myself"
+	} else {
+	    set u recursive
+	    lappend z "del calling recursive"
+	    update
+	    lappend z "del after update"
+	}
+    }
+    set z ""
+    set u toplevel
+    update
+    return $z
+} -cleanup {
+    chan close $f
+} -result [list {del calling recursive} {del deleted notcalled} \
+	       {del deleted myself} {del after update}]
+test chan-io-50.6 {testing handler deletion vs reentrant calls} -setup {
+    file delete $path(test1)
+    set f [open $path(test1) w]
+    chan close $f
+} -constraints {testchannelevent} -body {
+    set f [open $path(test1) r]
+    testchannelevent $f add readable [namespace code [list second $f]]
+    testchannelevent $f add readable [namespace code [list first $f]]
+    proc first {f} {
+	variable u
+	variable z
+	if {$u eq "toplevel"} {
+	    lappend z "first called"
+	    set u first
+	    update
+	    lappend z "first after update"
+	} else {
+	    lappend z "first called not toplevel"
+	}
+    }
+    proc second {f} {
+	variable u
+	variable z
+	if {$u eq "first"} {
+	    lappend z "second called, first time"
+	    set u second
+	    testchannelevent $f delete 0
+	} elseif {$u eq "second"} {
+	    lappend z "second called, second time"
+	    testchannelevent $f delete 0
+	} else {
+	    lappend z "second called, cannot happen!"
+	    testchannelevent $f removeall
+	}
+    }
+    set z ""
+    set u toplevel
+    update
+    return $z
+} -cleanup {
+    chan close $f
+} -result [list {first called} {first called not toplevel} \
+	       {second called, first time} {second called, second time} \
+	       {first after update}]
+
+test chan-io-51.1 {Test old socket deletion on Macintosh} -setup {
+    set x 0
+    set result ""
+    variable wait ""
+} -constraints {socket} -body {
+    proc accept {s a p} {
+	variable x
+	chan configure $s -blocking off
+	chan puts $s "sock[incr x]"
+	chan close $s
+	variable wait done
+    }
+    set ss [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    set port [lindex [chan configure $ss -sockname] 2]
+    set cs [socket 127.0.0.1 $port]
+    vwait [namespace which -variable wait]
+    lappend result [chan gets $cs]
+    chan close $cs
+    set cs [socket 127.0.0.1 $port]
+    vwait [namespace which -variable wait]
+    lappend result [chan gets $cs]
+    chan close $cs
+    set cs [socket 127.0.0.1 $port]
+    vwait [namespace which -variable wait]
+    lappend result [chan gets $cs]
+    chan close $cs
+    set cs [socket 127.0.0.1 $port]
+    vwait [namespace which -variable wait]
+    lappend result [chan gets $cs]
+} -cleanup {
+    chan close $cs
+    chan close $ss
+} -result {sock1 sock2 sock3 sock4}
+
+test chan-io-52.1 {TclCopyChannel} -constraints {fcopy} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $thisScript]
+    set f2 [open $path(test1) w]
+    chan copy $f1 $f2 -command " # "
+    chan copy $f1 $f2
+} -returnCodes error -cleanup {
+    chan close $f1
+    chan close $f2
+} -match glob -result {channel "*" is busy}
+test chan-io-52.2 {TclCopyChannel} -constraints {fcopy} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $thisScript]
+    set f2 [open $path(test1) w]
+    set f3 [open $thisScript]
+    chan copy $f1 $f2 -command " # "
+    chan copy $f3 $f2
+} -returnCodes error -cleanup {
+    chan close $f1
+    chan close $f2
+    chan close $f3
+} -match glob -result {channel "*" is busy}
+test chan-io-52.3 {TclCopyChannel} -constraints {fcopy} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $thisScript]
+    set f2 [open $path(test1) w]
+    chan configure $f1 -translation lf -blocking 0
+    chan configure $f2 -translation cr -blocking 0
+    set s0 [chan copy $f1 $f2]
+    set result [list [chan configure $f1 -blocking] [chan configure $f2 -blocking]]
+    chan close $f1
+    chan close $f2
+    set s1 [file size $thisScript]
+    set s2 [file size $path(test1)]
+    if {($s1 == $s2) && ($s0 == $s1)} {
+        lappend result ok
+    }
+    return $result
+} -result {0 0 ok}
+test chan-io-52.4 {TclCopyChannel} -constraints {fcopy} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $thisScript]
+    set f2 [open $path(test1) w]
+    chan configure $f1 -translation lf -blocking 0
+    chan configure $f2 -translation cr -blocking 0
+    chan copy $f1 $f2 -size 40
+    set result [list [chan configure $f1 -blocking] [chan configure $f2 -blocking]]
+    chan close $f1
+    chan close $f2
+    lappend result [file size $path(test1)]
+} -result {0 0 40}
+test chan-io-52.5 {TclCopyChannel, all} -constraints {fcopy} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $thisScript]
+    set f2 [open $path(test1) w]
+    chan configure $f1 -translation lf -blocking 0
+    chan configure $f2 -translation lf -blocking 0
+    chan copy $f1 $f2 -size -1 ;# -1 means 'copy all', same as if no -size specified.
+    set result [list [chan configure $f1 -blocking] [chan configure $f2 -blocking]]
+    chan close $f1
+    chan close $f2
+    if {[file size $thisScript] == [file size $path(test1)]} {
+        lappend result ok
+    }
+    return $result
+} -result {0 0 ok}
+test chan-io-52.5a {TclCopyChannel, all, other negative value} -setup {
+    file delete $path(test1)
+} -constraints {fcopy} -body {
+    set f1 [open $thisScript]
+    set f2 [open $path(test1) w]
+    chan configure $f1 -translation lf -blocking 0
+    chan configure $f2 -translation lf -blocking 0
+    chan copy $f1 $f2 -size -2 ;# < 0 behaves like -1, copy all
+    set result [list [chan configure $f1 -blocking] [chan configure $f2 -blocking]]
+    chan close $f1
+    chan close $f2
+    if {[file size $thisScript] == [file size $path(test1)]} {
+        lappend result ok
+    }
+    return $result
+} -result {0 0 ok}
+test chan-io-52.5b {TclCopyChannel, all, wrap to negative value} -setup {
+    file delete $path(test1)
+} -constraints {fcopy} -body {
+    set f1 [open $thisScript]
+    set f2 [open $path(test1) w]
+    chan configure $f1 -translation lf -blocking 0
+    chan configure $f2 -translation lf -blocking 0
+    chan copy $f1 $f2 -size 3221176172 ;# Wrapped to < 0, behaves like -1, copy all
+    set result [list [chan configure $f1 -blocking] [chan configure $f2 -blocking]]
+    chan close $f1
+    chan close $f2
+    if {[file size $thisScript] ==  [file size $path(test1)]} {
+        lappend result ok
+    }
+    return $result
+} -result {0 0 ok}
+test chan-io-52.6 {TclCopyChannel} -setup {
+    file delete $path(test1)
+} -constraints {fcopy} -body {
+    set f1 [open $thisScript]
+    set f2 [open $path(test1) w]
+    chan configure $f1 -translation lf -blocking 0
+    chan configure $f2 -translation lf -blocking 0
+    set s0 [chan copy $f1 $f2 -size [expr [file size $thisScript] + 5]]
+    set result [list [chan configure $f1 -blocking] [chan configure $f2 -blocking]]
+    chan close $f1
+    chan close $f2
+    set s1 [file size $thisScript]
+    set s2 [file size $path(test1)]
+    if {($s1 == $s2) && ($s0 == $s1)} {
+        lappend result ok
+    }
+    return $result
+} -result {0 0 ok}
+test chan-io-52.7 {TclCopyChannel} -constraints {fcopy} -setup {
+    file delete $path(test1)
+} -body {
+    set f1 [open $thisScript]
+    set f2 [open $path(test1) w]
+    chan configure $f1 -translation lf -blocking 0
+    chan configure $f2 -translation lf -blocking 0
+    chan copy $f1 $f2
+    set result [list [chan configure $f1 -blocking] [chan configure $f2 -blocking]]
+    if {[file size $thisScript] == [file size $path(test1)]} {
+        lappend result ok
+    }
+    return $result
+} -cleanup {
+    chan close $f1
+    chan close $f2
+} -result {0 0 ok}
+test chan-io-52.8 {TclCopyChannel} -setup {
+    file delete $path(test1)
+    file delete $path(pipe)
+} -constraints {stdio openpipe fcopy} -body {
+    set f1 [open $path(pipe) w]
+    chan configure $f1 -translation lf
+    chan puts $f1 "
+	chan puts ready
+	chan gets stdin
+	set f1 \[open [list $thisScript] r\]
+	chan configure \$f1 -translation lf
+	chan puts \[chan read \$f1 100\]
+	chan close \$f1
+    "
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    chan configure $f1 -translation lf
+    chan gets $f1
+    chan puts $f1 ready
+    chan flush $f1
+    set f2 [open $path(test1) w]
+    chan configure $f2 -translation lf
+    set s0 [chan copy $f1 $f2 -size 40]
+    catch {chan close $f1}
+    chan close $f2
+    list $s0 [file size $path(test1)]
+} -result {40 40}
+# Empty files, to register them with the test facility
+set path(kyrillic.txt)   [makeFile {} kyrillic.txt]
+set path(utf8-fcopy.txt) [makeFile {} utf8-fcopy.txt]
+set path(utf8-rp.txt)    [makeFile {} utf8-rp.txt]
+# Create kyrillic file, use lf translation to avoid os eol issues
+set out [open $path(kyrillic.txt) w]
+chan configure $out -encoding koi8-r -translation lf
+chan puts       $out "\u0410\u0410"
+chan close      $out
+test chan-io-52.9 {TclCopyChannel & encodings} {fcopy} {
+    # Copy kyrillic to UTF-8, using chan copy.
+    set in  [open $path(kyrillic.txt) r]
+    set out [open $path(utf8-fcopy.txt) w]
+    chan configure $in  -encoding koi8-r -translation lf
+    chan configure $out -encoding utf-8 -translation lf
+    chan copy $in $out
+    chan close $in
+    chan close $out
+    # Do the same again, but differently (read/chan puts).
+    set in  [open $path(kyrillic.txt) r]
+    set out [open $path(utf8-rp.txt) w]
+    chan configure $in  -encoding koi8-r -translation lf
+    chan configure $out -encoding utf-8 -translation lf
+    chan puts -nonewline $out [chan read $in]
+    chan close $in
+    chan close $out
+    list [file size $path(kyrillic.txt)] \
+	    [file size $path(utf8-fcopy.txt)] \
+	    [file size $path(utf8-rp.txt)]
+} {3 5 5}
+test chan-io-52.10 {TclCopyChannel & encodings} {fcopy} {
+    # encoding to binary (=> implies that the internal utf-8 is written)
+    set in  [open $path(kyrillic.txt) r]
+    set out [open $path(utf8-fcopy.txt) w]
+    chan configure $in  -encoding koi8-r -translation lf
+    # -translation binary is also -encoding binary
+    chan configure $out -translation binary
+    chan copy $in $out
+    chan close $in
+    chan close $out
+    file size $path(utf8-fcopy.txt)
+} 5
+test chan-io-52.11 {TclCopyChannel & encodings} -setup {
+    set f [open $path(utf8-fcopy.txt) w]
+    fconfigure $f -encoding utf-8
+    puts $f "\u0410\u0410"
+    close $f
+} -constraints {fcopy} -body {
+    # binary to encoding => the input has to be in utf-8 to make sense to the
+    # encoder
+    set in  [open $path(utf8-fcopy.txt) r]
+    set out [open $path(kyrillic.txt) w]
+    # -translation binary is also -encoding binary
+    chan configure $in  -translation binary
+    chan configure $out -encoding koi8-r -translation lf
+    chan copy $in $out
+    chan close $in
+    chan close $out
+    file size $path(kyrillic.txt)
+} -result 3
+
+test chan-io-53.1 {CopyData} -setup {
+    file delete $path(test1)
+} -constraints {fcopy} -body {
+    set f1 [open $thisScript]
+    set f2 [open $path(test1) w]
+    chan configure $f1 -translation lf -blocking 0
+    chan configure $f2 -translation cr -blocking 0
+    chan copy $f1 $f2 -size 0
+    set result [list [chan configure $f1 -blocking] [chan configure $f2 -blocking]]
+    chan close $f1
+    chan close $f2
+    lappend result [file size $path(test1)]
+} -result {0 0 0}
+test chan-io-53.2 {CopyData} -setup {
+    file delete $path(test1)
+} -constraints {fcopy} -body {
+    set f1 [open $thisScript]
+    set f2 [open $path(test1) w]
+    chan configure $f1 -translation lf -blocking 0
+    chan configure $f2 -translation cr -blocking 0
+    chan copy $f1 $f2 -command [namespace code {set s0}]
+    set result [list [chan configure $f1 -blocking] [chan configure $f2 -blocking]]
+    variable s0
+    vwait [namespace which -variable s0]
+    chan close $f1
+    chan close $f2
+    set s1 [file size $thisScript]
+    set s2 [file size $path(test1)]
+    if {($s1 == $s2) && ($s0 == $s1)} {
+        lappend result ok
+    }
+    return $result
+} -result {0 0 ok}
+test chan-io-53.3 {CopyData: background read underflow} -setup {
+    file delete $path(test1)
+    file delete $path(pipe)
+} -constraints {stdio unix openpipe fcopy} -body {
+    set f1 [open $path(pipe) w]
+    chan puts -nonewline $f1 {
+	chan puts ready
+	chan flush stdout			;# Don't assume line buffered!
+	chan copy stdin stdout -command { set x }
+	vwait x
+	set f [}
+    chan puts $f1 [list open $path(test1) w]]
+    chan puts $f1 {
+	chan configure $f -translation lf
+	chan puts $f "done"
+	chan close $f
+    }
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    set result [chan gets $f1]
+    chan puts $f1 line1
+    chan flush $f1
+    lappend result [chan gets $f1]
+    chan puts $f1 line2
+    chan flush $f1
+    lappend result [chan gets $f1]
+    chan close $f1
+    after 500
+    set f [open $path(test1)]
+    lappend result [chan read $f]
+} -cleanup {
+    chan close $f
+} -result "ready line1 line2 {done\n}"
+test chan-io-53.4 {CopyData: background write overflow} -setup {
+    set big bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n
+    variable x
+    for {set x 0} {$x < 12} {incr x} {
+	append big $big
+    }
+    file delete $path(test1)
+    file delete $path(pipe)
+} -constraints {stdio unix openpipe fileevent fcopy} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {
+	chan puts ready
+	chan copy stdin stdout -command { set x }
+	vwait x
+	set f [open $path(test1) w]
+	chan configure $f -translation lf
+	chan puts $f "done"
+	chan close $f
+    }
+    chan close $f1
+    set f1 [openpipe r+ $path(pipe)]
+    set result [chan gets $f1]
+    chan configure $f1 -blocking 0
+    chan puts $f1 $big
+    chan flush $f1
+    after 500
+    set result ""
+    chan event $f1 read [namespace code {
+	append result [chan read $f1 1024]
+	if {[string length $result] >= [string length $big]} {
+	    set x done
+	}
+    }]
+    vwait [namespace which -variable x]
+    return $x
+} -cleanup {
+    set big {}
+    chan close $f1
+} -result done
+set result {}
+proc FcopyTestAccept {sock args} {
+    after 1000 "chan close $sock"
+}
+proc FcopyTestDone {bytes {error {}}} {
+    variable fcopyTestDone
+    if {[string length $error]} {
+	set fcopyTestDone 1
+    } else {
+	set fcopyTestDone 0
+    }
+}
+test chan-io-53.5 {CopyData: error during chan copy} {socket fcopy} {
+    variable fcopyTestDone
+    set listen [socket -server [namespace code FcopyTestAccept] -myaddr 127.0.0.1 0]
+    set in [open $thisScript]	;# 126 K
+    set out [socket 127.0.0.1 [lindex [chan configure $listen -sockname] 2]]
+    catch {unset fcopyTestDone}
+    chan close $listen	;# This means the socket open never really succeeds
+    chan copy $in $out -command [namespace code FcopyTestDone]
+    variable fcopyTestDone
+    if ![info exists fcopyTestDone] {
+	vwait [namespace which -variable fcopyTestDone]		;# The error occurs here in the b.g.
+    }
+    chan close $in
+    chan close $out
+    set fcopyTestDone	;# 1 for error condition
+} 1
+test chan-io-53.6 {CopyData: error during chan copy} -setup {
+    variable fcopyTestDone
+    file delete $path(pipe)
+    file delete $path(test1)
+    catch {unset fcopyTestDone}
+} -constraints {stdio openpipe fcopy} -body {
+    set f1 [open $path(pipe) w]
+    chan puts $f1 "exit 1"
+    chan close $f1
+    set in [openpipe r+ $path(pipe)]
+    set out [open $path(test1) w]
+    chan copy $in $out -command [namespace code FcopyTestDone]
+    variable fcopyTestDone
+    if ![info exists fcopyTestDone] {
+	vwait [namespace which -variable fcopyTestDone]
+    }
+    return $fcopyTestDone	;# 0 for plain end of file
+} -cleanup {
+    catch {chan close $in}
+    chan close $out
+} -result 0
+proc doFcopy {in out {bytes 0} {error {}}} {
+    variable fcopyTestDone
+    variable fcopyTestCount
+    incr fcopyTestCount $bytes
+    if {[string length $error]} {
+	set fcopyTestDone 1
+    } elseif {[chan eof $in]} {
+	set fcopyTestDone 0
+    } else {
+        # Delay next chan copy to wait for size>0 input bytes
+        after 100 [list chan copy $in $out -size 1000 \
+		-command [namespace code [list doFcopy $in $out]]]
+    }
+}
+test chan-io-53.7 {CopyData: Flooding chan copy from pipe} -setup {
+    variable fcopyTestDone
+    file delete $path(pipe)
+    catch {unset fcopyTestDone}
+} -constraints {stdio openpipe fcopy} -body {
+    set fcopyTestCount 0
+    set f1 [open $path(pipe) w]
+    chan puts $f1 {
+	# Write  10 bytes / 10 msec
+	proc Write {count} {
+	    chan puts -nonewline "1234567890"
+	    if {[incr count -1]} {
+	        after 10 [list Write $count]
+	    } else {
+	        set ::ready 1
+	    }
+	}
+	chan configure stdout -buffering none
+	Write 345 ;# 3450 bytes ~3.45 sec
+	vwait ready
+	exit 0
+    }
+    chan close $f1
+    set in [openpipe r+ $path(pipe) &]
+    set out [open $path(test1) w]
+    doFcopy $in $out
+    variable fcopyTestDone
+    if {![info exists fcopyTestDone]} {
+	vwait [namespace which -variable fcopyTestDone]
+    }
+    # -1=error 0=script error N=number of bytes
+    expr ($fcopyTestDone == 0) ? $fcopyTestCount : -1
+} -cleanup {
+    catch {chan close $in}
+    chan close $out
+} -result {3450}
+test chan-io-53.8 {CopyData: async callback and error handling, Bug 1932639} -setup {
+    # copy progress callback. errors out intentionally
+    proc cmd args {
+	lappend ::RES "CMD $args"
+	error !STOP
+    }
+    # capture callback error here
+    proc ::bgerror args {
+	lappend ::RES "bgerror/OK $args"
+	set ::forever has-been-reached
+	return
+    }
+    # Files we use for our channels
+    set foo [makeFile ashgdfashdgfasdhgfasdhgf foo]
+    set bar [makeFile {} bar]
+    # Channels to copy between
+    set f [open $foo r] ; fconfigure $f -translation binary
+    set g [open $bar w] ; fconfigure $g -translation binary -buffering none
+} -constraints {stdio openpipe fcopy} -body {
+    # Record input size, so that result is always defined
+    lappend ::RES [file size $bar]
+    # Run the copy. Should not invoke -command now.
+    chan copy $f $g -size 2 -command [namespace code cmd]
+    # Check that -command was not called synchronously
+    set sbs [file size $bar]
+    lappend ::RES [expr {($sbs > 0) ? "sync/FAIL" : "sync/OK"}] $sbs
+    # Now let the async part happen. Should capture the error in cmd via
+    # bgerror. If not break the event loop via timer.
+    set token [after 1000 {
+	lappend ::RES {bgerror/FAIL timeout}
+	set ::forever has-been-reached
+    }]
+    vwait ::forever
+    catch {after cancel $token}
+    # Report
+    return $::RES
+} -cleanup {
+    chan close $f
+    chan close $g
+    catch {unset ::RES}
+    catch {unset ::forever}
+    rename ::bgerror {}
+    removeFile foo
+    removeFile bar
+} -result {0 sync/OK 0 {CMD 2} {bgerror/OK !STOP}}
+test chan-io-53.8a {CopyData: async callback and error handling, Bug 1932639, at eof} -setup {
+    # copy progress callback.
+    proc cmd args {
+	lappend ::RES "CMD $args"
+	set ::forever has-been-reached
+	return
+    }
+    # Files we use for our channels
+    set foo [makeFile ashgdfashdgfasdhgfasdhgf foo]
+    set bar [makeFile {} bar]
+    # Channels to copy between
+    set f [open $foo r] ; chan configure $f -translation binary
+    set g [open $bar w] ; chan configure $g -translation binary -buffering none
+} -constraints {stdio openpipe fcopy} -body {
+    # Initialize and force eof on the input.
+    chan seek $f 0 end ; chan read $f 1
+    set ::RES [chan eof $f]
+    # Run the copy. Should not invoke -command now.
+    chan copy $f $g -size 2 -command [namespace code cmd]
+    # Check that -command was not called synchronously
+    lappend ::RES [expr {([llength $::RES] > 1) ? "sync/FAIL" : "sync/OK"}]
+    # Now let the async part happen. Should capture the eof in cmd
+    # If not break the event loop via timer.
+    set token [after 1000 {
+	lappend ::RES {cmd/FAIL timeout}
+	set ::forever has-been-reached
+    }]
+    vwait ::forever
+    catch {after cancel $token}
+    # Report
+    return $::RES
+} -cleanup {
+    chan close $f
+    chan close $g
+    catch {unset ::RES}
+    catch {unset ::forever}
+    removeFile foo
+    removeFile bar
+} -result {1 sync/OK {CMD 0}}
+test chan-io-53.9 {CopyData: -size and event interaction, Bug 780533} -setup {
+    set out [makeFile {} out]
+    set err [makeFile {} err]
+    set pipe [open "|[list [info nameofexecutable] 2> $err]" r+]
+    chan configure $pipe -translation binary -buffering line
+    chan puts $pipe {
+	chan configure stdout -translation binary -buffering line
+	chan puts stderr Waiting...
+	after 1000
+	foreach x {a b c} {
+	    chan puts stderr Looping...
+	    chan puts $x
+	    after 500
+	}
+	proc bye args {
+	    if {[chan gets stdin line]<0} {
+		chan puts stderr "CHILD: EOF detected, exiting"
+		exit
+	    } else {
+		chan puts stderr "CHILD: ignoring line: $line"
+	    }
+	}
+	chan puts stderr Now-sleeping-forever
+	chan event stdin readable bye
+	vwait forever
+    }
+    proc ::done args {
+	set ::forever OK
+	return
+    }
+    set ::forever {}
+    set out [open $out w]
+} -constraints {stdio openpipe fcopy} -body {
+    chan copy $pipe $out -size 6 -command ::done
+    set token [after 5000 {
+	set ::forever {fcopy hangs}
+    }]
+    vwait ::forever
+    catch {after cancel $token}
+    set ::forever
+} -cleanup {
+    chan close $pipe
+    rename ::done {}
+    if {[testConstraint win]} {
+	after 1000;		# Allow Windows time to figure out that the
+                                # process is gone
+    }
+    catch {close $out}
+    catch {removeFile out}
+    catch {removeFile err}
+    catch {unset ::forever}
+} -result OK
+test chan-io-53.10 {Bug 1350564, multi-directional fcopy} -setup {
+    set err [makeFile {} err]
+    set pipe [open "|[list [info nameofexecutable] 2> $err]" r+]
+    chan configure $pipe -translation binary -buffering line
+    chan puts $pipe {
+	chan configure stderr -buffering line
+	# Kill server when pipe closed by invoker.
+	proc bye args {
+	    if {![chan eof stdin]} { chan gets stdin ; return }
+	    chan puts stderr BYE
+	    exit
+	}
+	# Server code. Bi-directional copy between 2 sockets.
+	proc geof {sok} {
+	    chan puts stderr DONE/$sok
+	    chan close $sok
+	}
+	proc new {sok args} {
+	    chan puts stderr NEW/$sok
+	    global l srv
+	    chan configure $sok -translation binary -buffering none
+	    lappend l $sok
+	    if {[llength $l] == 2} {
+		chan close $srv
+		foreach {a b} $l break
+		chan copy $a $b -command [list geof $a]
+		chan copy $b $a -command [list geof $b]
+		chan puts stderr 2COPY
+	    }
+	    chan puts stderr ...
+	}
+	chan puts stderr SRV
+	set l {}
+	set srv [socket -server new 9999]
+	chan puts stderr WAITING
+	chan event stdin readable bye
+	chan puts OK
+	vwait forever
+    }
+    # wait for OK from server.
+    chan gets $pipe
+    # Now the two clients.
+    proc done {sock} {
+	if {[chan eof $sock]} { chan close $sock ; return }
+	lappend ::forever [chan gets $sock]
+	return
+    }
+    set a [socket 127.0.0.1 9999]
+    set b [socket 127.0.0.1 9999]
+    chan configure $a -translation binary -buffering none
+    chan configure $b -translation binary -buffering none
+    chan event  $a readable [namespace code "done $a"]
+    chan event  $b readable [namespace code "done $b"]
+} -constraints {stdio openpipe fcopy} -body {
+    # Now pass data through the server in both directions.
+    set ::forever {}
+    chan puts $a AB
+    vwait ::forever
+    chan puts $b BA
+    vwait ::forever
+    set ::forever
+} -cleanup {
+    catch {chan close $a}
+    catch {chan close $b}
+    chan close $pipe
+    if {[testConstraint win]} {
+	after 1000		;# Give Windows time to kill the process
+    }
+    removeFile err
+    catch {unset ::forever}
+} -result {AB BA}
+
+test chan-io-54.1 {Recursive channel events} {socket fileevent} {
+    # This test checks to see if file events are delivered during recursive
+    # event loops when there is buffered data on the channel.
+    proc accept {s a p} {
+	variable as
+	chan configure $s -translation lf
+	chan puts $s "line 1\nline2\nline3"
+	chan flush $s
+	set as $s
+    }
+    proc readit {s next} {
+	variable x
+	variable result
+	lappend result $next
+	if {$next == 1} {
+	    chan event $s readable [namespace code [list readit $s 2]]
+	    vwait [namespace which -variable x]
+	}
+	incr x
+    }
+    set ss [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    # We need to delay on some systems until the creation of the server socket
+    # completes.
+    set done 0
+    for {set i 0} {$i < 10} {incr i} {
+	if {![catch {
+	    set cs [socket 127.0.0.1 [lindex [chan configure $ss -sockname] 2]]
+	}]} then {
+	    set done 1
+	    break
+	}
+	after 100
+    }
+    if {$done == 0} {
+	chan close $ss
+	error "failed to connect to server"
+    }
+    variable result {}
+    variable x 0
+    variable as
+    vwait [namespace which -variable as]
+    chan configure $cs -translation lf
+    lappend result [chan gets $cs]
+    chan configure $cs -blocking off
+    chan event $cs readable [namespace code [list readit $cs 1]]
+    set a [after 2000 [namespace code { set x failure }]]
+    vwait [namespace which -variable x]
+    after cancel $a
+    chan close $as
+    chan close $ss
+    chan close $cs
+    list $result $x
+} {{{line 1} 1 2} 2}
+test chan-io-54.2 {Testing for busy-wait in recursive channel events} -setup {
+    set accept {}
+    set after {}
+    variable done 0
+} -constraints {socket fileevent} -body {
+    variable s [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    proc accept {s a p} {
+	variable counter 0
+	variable accept $s
+	chan configure $s -blocking off -buffering line -translation lf
+	chan event $s readable [namespace code "doit $s"]
+    }
+    proc doit {s} {
+	variable counter
+	variable after
+	incr counter
+	if {[chan gets $s] eq ""} {
+	    chan event $s readable [namespace code "doit1 $s"]
+	    set after [after 1000 [namespace code {
+		chan puts $writer hello
+		chan flush $writer
+		set done 1
+	    }]]
+	}
+    }
+    proc doit1 {s} {
+	variable counter
+	variable accept
+	incr counter
+	chan gets $s
+	chan close $s
+	set accept {}
+    }
+    proc producer {} {
+	variable s
+	variable writer
+	set writer [socket 127.0.0.1 [lindex [chan configure $s -sockname] 2]]
+	chan configure $writer -buffering line
+	chan puts -nonewline $writer hello
+	chan flush $writer
+    }
+    producer
+    vwait [namespace which -variable done]
+    chan close $writer
+    chan close $s
+    after cancel $after
+    return $counter
+} -cleanup {
+    if {$accept ne {}} {chan close $accept}
+} -result 1
+
+set path(fooBar) [makeFile {} fooBar]
+
+test chan-io-55.1 {ChannelEventScriptInvoker: deletion} -constraints {
+    fileevent
+} -setup {
+    variable x
+    proc eventScript {fd} {
+	variable x
+	chan close $fd
+	error "planned error"
+	set x whoops
+    }
+    proc myHandler args {
+	variable x got_error
+    }
+    set handler [interp bgerror {}]
+    interp bgerror {} [namespace which myHandler]
+} -body {
+    set f [open $path(fooBar) w]
+    chan event $f writable [namespace code [list eventScript $f]]
+    variable x not_done
+    vwait [namespace which -variable x]
+    return $x
+} -cleanup {
+    interp bgerror {} $handler
+} -result {got_error}
+
+test chan-io-56.1 {ChannelTimerProc} {testchannelevent} {
+    set f [open $path(fooBar) w]
+    chan puts $f "this is a test"
+    chan close $f
+    set f [open $path(fooBar) r]
+    testchannelevent $f add readable [namespace code {
+	chan read $f 1
+	incr x
+    }]
+    variable x 0
+    vwait [namespace which -variable x]
+    vwait [namespace which -variable x]
+    set result $x
+    testchannelevent $f set 0 none
+    after idle [namespace code {set y done}]
+    variable y
+    vwait [namespace which -variable y]
+    chan close $f
+    lappend result $y
+} {2 done}
+
+test chan-io-57.1 {buffered data and file events, gets} -setup {
+    variable s2
+} -constraints {fileevent} -body {
+    proc accept {sock args} {
+	variable s2
+	set s2 $sock
+    }
+    set server [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    set s [socket 127.0.0.1 [lindex [chan configure $server -sockname] 2]]
+    vwait [namespace which -variable s2]
+    update
+    chan event $s2 readable [namespace code {lappend result readable}]
+    chan puts $s "12\n34567890"
+    chan flush $s
+    variable result [chan gets $s2]
+    after 1000 [namespace code {lappend result timer}]
+    vwait [namespace which -variable result]
+    lappend result [chan gets $s2]
+    vwait [namespace which -variable result]
+    return $result
+} -cleanup {
+    chan close $s
+    chan close $s2
+    chan close $server
+} -result {12 readable 34567890 timer}
+test chan-io-57.2 {buffered data and file events, read} -setup {
+    variable s2
+} -constraints {fileevent} -body {
+    proc accept {sock args} {
+	variable s2
+	set s2 $sock
+    }
+    set server [socket -server [namespace code accept] -myaddr 127.0.0.1 0]
+    set s [socket 127.0.0.1 [lindex [chan configure $server -sockname] 2]]
+    vwait [namespace which -variable s2]
+    update
+    chan event $s2 readable [namespace code {lappend result readable}]
+    chan puts -nonewline $s "1234567890"
+    chan flush $s
+    variable result [chan read $s2 1]
+    after 1000 [namespace code {lappend result timer}]
+    vwait [namespace which -variable result]
+    lappend result [chan read $s2 9]
+    vwait [namespace which -variable result]
+    return $result
+} -cleanup {
+    chan close $s
+    chan close $s2
+    chan close $server
+} -result {1 readable 234567890 timer}
+
+test chan-io-58.1 {Tcl_NotifyChannel and error when closing} {stdio unixOrPc openpipe fileevent} {
+    set out [open $path(script) w]
+    chan puts $out {
+	chan puts "normal message from pipe"
+	chan puts stderr "error message from pipe"
+	exit 1
+    }
+    proc readit {pipe} {
+	variable x
+	variable result
+	if {[chan eof $pipe]} {
+	    set x [catch {chan close $pipe} line]
+	    lappend result catch $line
+	} else {
+	    chan gets $pipe line
+	    lappend result chan gets $line
+	}
+    }
+    chan close $out
+    set pipe [openpipe r $path(script)]
+    chan event $pipe readable [namespace code [list readit $pipe]]
+    variable x ""
+    set result ""
+    vwait [namespace which -variable x]
+    list $x $result
+} {1 {chan gets {normal message from pipe} chan gets {} catch {error message from pipe}}}
+
+test chan-io-59.1 {Thread reference of channels} {testmainthread testchannel} {
+    # TIP #10
+    # More complicated tests (like that the reference changes as a channel is
+    # moved from thread to thread) can be done only in the extension which
+    # fully implements the moving of channels between threads, i.e. 'Threads'.
+    set f [open $path(longfile) r]
+    set result [testchannel mthread $f]
+    chan close $f
+    string equal $result [testmainthread]
+} {1}
+
+test chan-io-60.1 {writing illegal utf sequences} {openpipe fileevent testbytestring} {
+    # This test will hang in older revisions of the core.
+    set out [open $path(script) w]
+    chan puts $out {
+	chan puts [testbytestring \xe2]
+	exit 1
+    }
+    proc readit {pipe} {
+	variable x
+	variable result
+	if {[chan eof $pipe]} {
+	    set x [catch {chan close $pipe} line]
+	    lappend result catch $line
+	} else {
+	    chan gets $pipe line
+	    lappend result gets $line
+	}
+    }
+    chan close $out
+    set pipe [openpipe r $path(script)]
+    chan event $pipe readable [namespace code [list readit $pipe]]
+    variable x ""
+    set result ""
+    vwait [namespace which -variable x]
+    # cut of the remainder of the error stack, especially the filename
+    set result [lreplace $result 3 3 [lindex [split [lindex $result 3] \n] 0]]
+    list $x $result
+} {1 {gets {} catch {error writing "stdout": invalid argument}}}
+
+test chan-io-61.1 {Reset eof state after changing the eof char} -setup {
+    set datafile [makeFile {} eofchar]
+    set f [open $datafile w]
+    chan configure $f -translation binary
+    chan puts -nonewline $f [string repeat "Ho hum\n" 11]
+    chan puts $f =
+    set line [string repeat "Ge gla " 4]
+    chan puts -nonewline $f [string repeat [string trimright $line]\n 834]
+    chan close $f
+} -body {
+    set f [open $datafile r]
+    chan configure $f -eofchar =
+    set res {}
+    lappend res [chan read $f; chan tell $f]
+    chan configure $f -eofchar {}
+    lappend res [chan read $f 1]
+    lappend res [chan read $f; chan tell $f]
+    # Any seek zaps the internals into a good state.
+    #chan seek $f 0 start
+    #chan seek $f 0 current
+    #lappend res [chan read $f; chan tell $f]
+} -cleanup {
+    chan close $f
+    removeFile eofchar
+} -result {77 = 23431}
+
+# Test the cutting and splicing of channels, this is incidentially the
+# attach/detach facility of package Thread, but __without any safeguards__. It
+# can also be used to emulate transfer of channels between threads, and is
+# used for that here.
+
+test chan-io-70.0 {Cutting & Splicing channels} -setup {
+    set f [makeFile {... dummy ...} cutsplice]
+    set res {}
+} -constraints {testchannel} -body {
+    set c [open $f r]
+    lappend res [catch {chan seek $c 0 start}]
+    testchannel cut $c
+    lappend res [catch {chan seek $c 0 start}]
+    testchannel splice $c
+    lappend res [catch {chan seek $c 0 start}]
+} -cleanup {
+    chan close $c
+    removeFile cutsplice
+} -result {0 1 0}
+
+test chan-io-70.1 {Transfer channel} -setup {
+    set f [makeFile {... dummy ...} cutsplice]
+    set res {}
+} -constraints {testchannel thread} -body {
+    set c [open $f r]
+    lappend res [catch {chan seek $c 0 start}]
+    testchannel cut $c
+    lappend res [catch {chan seek $c 0 start}]
+    set tid [thread::create -preserved]
+    thread::send $tid [list set c $c]
+    thread::send $tid {load {} Tcltest}
+    lappend res [thread::send $tid {
+	testchannel splice $c
+	set res [catch {chan seek $c 0 start}]
+	chan close $c
+	set res
+    }]
+} -cleanup {
+    thread::release $tid
+    removeFile cutsplice
+} -result {0 1 0}
+
+# ### ### ### ######### ######### #########
+
+foreach {n msg expected} {
+     0 {}                                 {}
+     1 {{message only}}                   {{message only}}
+     2 {-options x}                       {-options x}
+     3 {-options {x y} {the message}}     {-options {x y} {the message}}
+
+     4 {-code 1     -level 0 -f ba snarf} {-code 1     -level 0 -f ba snarf}
+     5 {-code 0     -level 0 -f ba snarf} {-code 1     -level 0 -f ba snarf}
+     6 {-code 1     -level 5 -f ba snarf} {-code 1     -level 0 -f ba snarf}
+     7 {-code 0     -level 5 -f ba snarf} {-code 1     -level 0 -f ba snarf}
+     8 {-code error -level 0 -f ba snarf} {-code error -level 0 -f ba snarf}
+     9 {-code ok    -level 0 -f ba snarf} {-code 1     -level 0 -f ba snarf}
+    10 {-code error -level 5 -f ba snarf} {-code error -level 0 -f ba snarf}
+    11 {-code ok    -level 5 -f ba snarf} {-code 1     -level 0 -f ba snarf}
+    12 {-code boss  -level 0 -f ba snarf} {-code 1     -level 0 -f ba snarf}
+    13 {-code boss  -level 5 -f ba snarf} {-code 1     -level 0 -f ba snarf}
+    14 {-code 1     -level 0 -f ba}       {-code 1     -level 0 -f ba}
+    15 {-code 0     -level 0 -f ba}       {-code 1     -level 0 -f ba}
+    16 {-code 1     -level 5 -f ba}       {-code 1     -level 0 -f ba}
+    17 {-code 0     -level 5 -f ba}       {-code 1     -level 0 -f ba}
+    18 {-code error -level 0 -f ba}       {-code error -level 0 -f ba}
+    19 {-code ok    -level 0 -f ba}       {-code 1     -level 0 -f ba}
+    20 {-code error -level 5 -f ba}       {-code error -level 0 -f ba}
+    21 {-code ok    -level 5 -f ba}       {-code 1     -level 0 -f ba}
+    22 {-code boss  -level 0 -f ba}       {-code 1     -level 0 -f ba}
+    23 {-code boss  -level 5 -f ba}       {-code 1     -level 0 -f ba}
+    24 {-code 1     -level X -f ba snarf} {-code 1     -level 0 -f ba snarf}
+    25 {-code 0     -level X -f ba snarf} {-code 1     -level 0 -f ba snarf}
+    26 {-code error -level X -f ba snarf} {-code error -level 0 -f ba snarf}
+    27 {-code ok    -level X -f ba snarf} {-code 1     -level 0 -f ba snarf}
+    28 {-code boss  -level X -f ba snarf} {-code 1     -level 0 -f ba snarf}
+    29 {-code 1     -level X -f ba}       {-code 1     -level 0 -f ba}
+    30 {-code 0     -level X -f ba}       {-code 1     -level 0 -f ba}
+    31 {-code error -level X -f ba}       {-code error -level 0 -f ba}
+    32 {-code ok    -level X -f ba}       {-code 1     -level 0 -f ba}
+    33 {-code boss  -level X -f ba}       {-code 1     -level 0 -f ba}
+
+    34 {-code 1 -code 1     -level 0 -f ba snarf} {-code 1 -code 1     -level 0 -f ba snarf}
+    35 {-code 1 -code 0     -level 0 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    36 {-code 1 -code 1     -level 5 -f ba snarf} {-code 1 -code 1     -level 0 -f ba snarf}
+    37 {-code 1 -code 0     -level 5 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    38 {-code 1 -code error -level 0 -f ba snarf} {-code 1 -code error -level 0 -f ba snarf}
+    39 {-code 1 -code ok    -level 0 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    40 {-code 1 -code error -level 5 -f ba snarf} {-code 1 -code error -level 0 -f ba snarf}
+    41 {-code 1 -code ok    -level 5 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    42 {-code 1 -code boss  -level 0 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    43 {-code 1 -code boss  -level 5 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    44 {-code 1 -code 1     -level 0 -f ba}       {-code 1 -code 1     -level 0 -f ba}
+    45 {-code 1 -code 0     -level 0 -f ba}       {-code 1             -level 0 -f ba}
+    46 {-code 1 -code 1     -level 5 -f ba}       {-code 1 -code 1     -level 0 -f ba}
+    47 {-code 1 -code 0     -level 5 -f ba}       {-code 1             -level 0 -f ba}
+    48 {-code 1 -code error -level 0 -f ba}       {-code 1 -code error -level 0 -f ba}
+    49 {-code 1 -code ok    -level 0 -f ba}       {-code 1             -level 0 -f ba}
+    50 {-code 1 -code error -level 5 -f ba}       {-code 1 -code error -level 0 -f ba}
+    51 {-code 1 -code ok    -level 5 -f ba}       {-code 1             -level 0 -f ba}
+    52 {-code 1 -code boss  -level 0 -f ba}       {-code 1             -level 0 -f ba}
+    53 {-code 1 -code boss  -level 5 -f ba}       {-code 1             -level 0 -f ba}
+    54 {-code 1 -code 1     -level X -f ba snarf} {-code 1 -code 1     -level 0 -f ba snarf}
+    55 {-code 1 -code 0     -level X -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    56 {-code 1 -code error -level X -f ba snarf} {-code 1 -code error -level 0 -f ba snarf}
+    57 {-code 1 -code ok    -level X -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    58 {-code 1 -code boss  -level X -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    59 {-code 1 -code 1     -level X -f ba}       {-code 1 -code 1     -level 0 -f ba}
+    60 {-code 1 -code 0     -level X -f ba}       {-code 1             -level 0 -f ba}
+    61 {-code 1 -code error -level X -f ba}       {-code 1 -code error -level 0 -f ba}
+    62 {-code 1 -code ok    -level X -f ba}       {-code 1             -level 0 -f ba}
+    63 {-code 1 -code boss  -level X -f ba}       {-code 1             -level 0 -f ba}
+
+    64 {-code 0 -code 1     -level 0 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    65 {-code 0 -code 0     -level 0 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    66 {-code 0 -code 1     -level 5 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    67 {-code 0 -code 0     -level 5 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    68 {-code 0 -code error -level 0 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    69 {-code 0 -code ok    -level 0 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    70 {-code 0 -code error -level 5 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    71 {-code 0 -code ok    -level 5 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    72 {-code 0 -code boss  -level 0 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    73 {-code 0 -code boss  -level 5 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    74 {-code 0 -code 1     -level 0 -f ba}       {-code 1 -level 0 -f ba}
+    75 {-code 0 -code 0     -level 0 -f ba}       {-code 1 -level 0 -f ba}
+    76 {-code 0 -code 1     -level 5 -f ba}       {-code 1 -level 0 -f ba}
+    77 {-code 0 -code 0     -level 5 -f ba}       {-code 1 -level 0 -f ba}
+    78 {-code 0 -code error -level 0 -f ba}       {-code 1 -level 0 -f ba}
+    79 {-code 0 -code ok    -level 0 -f ba}       {-code 1 -level 0 -f ba}
+    80 {-code 0 -code error -level 5 -f ba}       {-code 1 -level 0 -f ba}
+    81 {-code 0 -code ok    -level 5 -f ba}       {-code 1 -level 0 -f ba}
+    82 {-code 0 -code boss  -level 0 -f ba}       {-code 1 -level 0 -f ba}
+    83 {-code 0 -code boss  -level 5 -f ba}       {-code 1 -level 0 -f ba}
+    84 {-code 0 -code 1     -level X -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    85 {-code 0 -code 0     -level X -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    86 {-code 0 -code error -level X -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    87 {-code 0 -code ok    -level X -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    88 {-code 0 -code boss  -level X -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    89 {-code 0 -code 1     -level X -f ba}       {-code 1 -level 0 -f ba}
+    90 {-code 0 -code 0     -level X -f ba}       {-code 1 -level 0 -f ba}
+    91 {-code 0 -code error -level X -f ba}       {-code 1 -level 0 -f ba}
+    92 {-code 0 -code ok    -level X -f ba}       {-code 1 -level 0 -f ba}
+    93 {-code 0 -code boss  -level X -f ba}       {-code 1 -level 0 -f ba}
+
+    94 {-code 1     -code 1 -level 0 -f ba snarf} {-code 1 -code 1     -level 0 -f ba snarf}
+    95 {-code 0     -code 1 -level 0 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    96 {-code 1     -code 1 -level 5 -f ba snarf} {-code 1 -code 1     -level 0 -f ba snarf}
+    97 {-code 0     -code 1 -level 5 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    98 {-code error -code 1 -level 0 -f ba snarf} {-code error -code 1 -level 0 -f ba snarf}
+    99 {-code ok    -code 1 -level 0 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    a0 {-code error -code 1 -level 5 -f ba snarf} {-code error -code 1 -level 0 -f ba snarf}
+    a1 {-code ok    -code 1 -level 5 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    a2 {-code boss  -code 1 -level 0 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    a3 {-code boss  -code 1 -level 5 -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    a4 {-code 1     -code 1 -level 0 -f ba}       {-code 1 -code 1     -level 0 -f ba}
+    a5 {-code 0     -code 1 -level 0 -f ba}       {-code 1             -level 0 -f ba}
+    a6 {-code 1     -code 1 -level 5 -f ba}       {-code 1 -code 1     -level 0 -f ba}
+    a7 {-code 0     -code 1 -level 5 -f ba}       {-code 1             -level 0 -f ba}
+    a8 {-code error -code 1 -level 0 -f ba}       {-code error -code 1 -level 0 -f ba}
+    a9 {-code ok    -code 1 -level 0 -f ba}       {-code 1             -level 0 -f ba}
+    b0 {-code error -code 1 -level 5 -f ba}       {-code error -code 1 -level 0 -f ba}
+    b1 {-code ok    -code 1 -level 5 -f ba}       {-code 1             -level 0 -f ba}
+    b2 {-code boss  -code 1 -level 0 -f ba}       {-code 1             -level 0 -f ba}
+    b3 {-code boss  -code 1 -level 5 -f ba}       {-code 1             -level 0 -f ba}
+    b4 {-code 1     -code 1 -level X -f ba snarf} {-code 1 -code 1     -level 0 -f ba snarf}
+    b5 {-code 0     -code 1 -level X -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    b6 {-code error -code 1 -level X -f ba snarf} {-code error -code 1 -level 0 -f ba snarf}
+    b7 {-code ok    -code 1 -level X -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    b8 {-code boss  -code 1 -level X -f ba snarf} {-code 1             -level 0 -f ba snarf}
+    b9 {-code 1     -code 1 -level X -f ba}       {-code 1 -code 1     -level 0 -f ba}
+    c0 {-code 0     -code 1 -level X -f ba}       {-code 1             -level 0 -f ba}
+    c1 {-code error -code 1 -level X -f ba}       {-code error -code 1 -level 0 -f ba}
+    c2 {-code ok    -code 1 -level X -f ba}       {-code 1             -level 0 -f ba}
+    c3 {-code boss  -code 1 -level X -f ba}       {-code 1             -level 0 -f ba}
+
+    c4 {-code 1     -code 0 -level 0 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    c5 {-code 0     -code 0 -level 0 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    c6 {-code 1     -code 0 -level 5 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    c7 {-code 0     -code 0 -level 5 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    c8 {-code error -code 0 -level 0 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    c9 {-code ok    -code 0 -level 0 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    d0 {-code error -code 0 -level 5 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    d1 {-code ok    -code 0 -level 5 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    d2 {-code boss  -code 0 -level 0 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    d3 {-code boss  -code 0 -level 5 -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    d4 {-code 1     -code 0 -level 0 -f ba}       {-code 1 -level 0 -f ba}
+    d5 {-code 0     -code 0 -level 0 -f ba}       {-code 1 -level 0 -f ba}
+    d6 {-code 1     -code 0 -level 5 -f ba}       {-code 1 -level 0 -f ba}
+    d7 {-code 0     -code 0 -level 5 -f ba}       {-code 1 -level 0 -f ba}
+    d8 {-code error -code 0 -level 0 -f ba}       {-code 1 -level 0 -f ba}
+    d9 {-code ok    -code 0 -level 0 -f ba}       {-code 1 -level 0 -f ba}
+    e0 {-code error -code 0 -level 5 -f ba}       {-code 1 -level 0 -f ba}
+    e1 {-code ok    -code 0 -level 5 -f ba}       {-code 1 -level 0 -f ba}
+    e2 {-code boss  -code 0 -level 0 -f ba}       {-code 1 -level 0 -f ba}
+    e3 {-code boss  -code 0 -level 5 -f ba}       {-code 1 -level 0 -f ba}
+    e4 {-code 1     -code 0 -level X -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    e5 {-code 0     -code 0 -level X -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    e6 {-code error -code 0 -level X -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    e7 {-code ok    -code 0 -level X -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    e8 {-code boss  -code 0 -level X -f ba snarf} {-code 1 -level 0 -f ba snarf}
+    e9 {-code 1     -code 0 -level X -f ba}       {-code 1 -level 0 -f ba}
+    f0 {-code 0     -code 0 -level X -f ba}       {-code 1 -level 0 -f ba}
+    f1 {-code error -code 0 -level X -f ba}       {-code 1 -level 0 -f ba}
+    f2 {-code ok    -code 0 -level X -f ba}       {-code 1 -level 0 -f ba}
+    f3 {-code boss  -code 0 -level X -f ba}       {-code 1 -level 0 -f ba}
+} {
+    test chan-io-71.$n {Tcl_SetChannelError} -setup {
+	set f [makeFile {... dummy ...} cutsplice]
+    } -constraints {testchannel} -body {
+	set c [open $f r]
+	testchannel setchannelerror $c [lrange $msg 0 end]
+    } -cleanup {
+	chan close $c
+	removeFile cutsplice
+    } -result [lrange $expected 0 end]
+    test chan-io-72.$n {Tcl_SetChannelErrorInterp} -setup {
+	set f [makeFile {... dummy ...} cutsplice]
+    } -constraints {testchannel} -body {
+	set c [open $f r]
+	testchannel setchannelerrorinterp $c [lrange $msg 0 end]
+    } -cleanup {
+	chan close $c
+	removeFile cutsplice
+    } -result [lrange $expected 0 end]
+}
+
+test chan-io-73.1 {channel Tcl_Obj SetChannelFromAny} -body {
+    # Test for Bug 1847044 - don't spoil type unless we have a valid channel
+    chan close [lreplace [list a] 0 end]
+} -returnCodes error -match glob -result *
+
+# ### ### ### ######### ######### #########
+
+# cleanup
+foreach file [list fooBar longfile script output test1 pipe my_script \
+	test2 test3 cat kyrillic.txt utf8-fcopy.txt utf8-rp.txt] {
+    removeFile $file
+}
+cleanupTests
+}
+namespace delete ::tcl::test::io