From 50d6201cac70a27a95e96cb3ceb1380716b58df1 Mon Sep 17 00:00:00 2001
From: andreas_kupries <akupries@shaw.ca>
Date: Fri, 23 Apr 2004 23:38:40 +0000
Subject: 	* generic/tclIO.c (Tcl_SetChannelOption): Fixed [SF Tcl Bug 
   930851]. When changing the eofchar we have to zap the related 	 
 flags to prevent them from prematurely aborting the next read.

---
 ChangeLog          |   6 +
 generic/tclIO.c    |  11 +-
 tests/eofchar.data | 846 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/io.test      |  17 +-
 4 files changed, 878 insertions(+), 2 deletions(-)
 create mode 100644 tests/eofchar.data

diff --git a/ChangeLog b/ChangeLog
index a24aa50..c395632 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2004-04-23  Andreas Kupries  <andreask@activestate.com>
+
+	* generic/tclIO.c (Tcl_SetChannelOption): Fixed [SF Tcl Bug
+	  930851]. When changing the eofchar we have to zap the related
+	  flags to prevent them from prematurely aborting the next read.
+
 2004-04-25  Vince Darley  <vincentdarley@users.sourceforge.net>
 
 	* generic/tclPathObj.c: fix to [Bug 940281].  Tcl_FSJoinPath
diff --git a/generic/tclIO.c b/generic/tclIO.c
index 9e33166..93bd0de 100644
--- a/generic/tclIO.c
+++ b/generic/tclIO.c
@@ -10,7 +10,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclIO.c,v 1.72 2004/04/06 22:25:51 dgp Exp $
+ * RCS: @(#) $Id: tclIO.c,v 1.73 2004/04/23 23:38:42 andreas_kupries Exp $
  */
 
 #include "tclInt.h"
@@ -6480,6 +6480,15 @@ Tcl_SetChannelOption(interp, chan, optionName, newValue)
         if (argv != NULL) {
             ckfree((char *) argv);
         }
+
+	/*
+	 * [SF Tcl Bug 930851] Reset EOF and BLOCKED flags. Changing
+	 * the character which signals eof can transform a current eof
+	 * condition into a 'go ahead'. Ditto for blocked.
+	 */
+
+	statePtr->flags &= (~(CHANNEL_EOF | CHANNEL_STICKY_EOF | CHANNEL_BLOCKED));
+
 	return TCL_OK;
     } else if ((len > 1) && (optionName[1] == 't') &&
             (strncmp(optionName, "-translation", len) == 0)) {
diff --git a/tests/eofchar.data b/tests/eofchar.data
new file mode 100644
index 0000000..4aa3d70
--- /dev/null
+++ b/tests/eofchar.data
@@ -0,0 +1,846 @@
+Ho hum
+Ho hum
+Ho hum
+Ho hum
+Ho hum
+Ho hum
+Ho hum
+Ho hum
+Ho hum
+Ho hum
+Ho hum
+=
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+Ge gla Ge gla Ge gla Ge gla
+Ge gla Ge gla Ge gla Ge gla
+Ge gla Ge gla Ge gla Ge gla
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diff --git a/tests/io.test b/tests/io.test
index c64298e..e3babf6 100644
--- a/tests/io.test
+++ b/tests/io.test
@@ -12,7 +12,7 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 #
-# RCS: @(#) $Id: io.test,v 1.50 2004/03/17 18:14:17 das Exp $
+# RCS: @(#) $Id: io.test,v 1.51 2004/04/23 23:38:42 andreas_kupries Exp $
 
 if {[catch {package require tcltest 2}]} {
     puts stderr "Skipping tests in [info script].  tcltest 2 required."
@@ -7098,7 +7098,22 @@ test io-60.1 {writing illegal utf sequences} {openpipe fileevent} {
     list $x $result
 } {1 {gets {} catch {error writing "stdout": invalid argument}}}
 
+set datafile [file join $::tcltest::testsDirectory eofchar.data]
 
+test io-61.1 {Reset eof state after changing the eof char} {
+    set f [open $datafile r]
+    fconfigure $f -eofchar =
+    lappend res [read $f; tell $f]
+    fconfigure $f -eofchar {}
+    lappend res [read $f 1]
+    lappend res [read $f; tell $f]
+    # Any seek zaps the internals into a good state.
+    #seek $f 0 start
+    #seek $f 0 current
+    #lappend res [read $f; tell $f]
+    close $f
+    set res
+} {77 = 23431}
 
 
 # cleanup
-- 
cgit v0.12