diff options
Diffstat (limited to 'library/init.tcl')
| -rw-r--r-- | library/init.tcl | 271 |
1 files changed, 128 insertions, 143 deletions
diff --git a/library/init.tcl b/library/init.tcl index c67a6e9..8a680f1 100644 --- a/library/init.tcl +++ b/library/init.tcl @@ -3,8 +3,6 @@ # Default system startup file for Tcl-based applications. Defines # "unknown" procedure and auto-load facilities. # -# RCS: @(#) $Id: init.tcl,v 1.85 2006/02/08 21:41:28 dgp Exp $ -# # Copyright (c) 1991-1993 The Regents of the University of California. # Copyright (c) 1994-1996 Sun Microsystems, Inc. # Copyright (c) 1998-1999 Scriptics Corporation. @@ -14,10 +12,11 @@ # of this file, and for a DISCLAIMER OF ALL WARRANTIES. # +# This test intentionally written in pre-7.5 Tcl if {[info commands package] == ""} { error "version mismatch: library\nscripts expect Tcl version 7.5b1 or later but the loaded version is\nonly [info patchlevel]" } -package require -exact Tcl 8.5 +package require -exact Tcl 8.7a0 # Compute the auto path to use in this interpreter. # The values on the path come from several locations: @@ -46,6 +45,7 @@ if {![info exists auto_path]} { set auto_path "" } } + namespace eval tcl { variable Dir foreach Dir [list $::tcl_library [file dirname $::tcl_library]] { @@ -75,33 +75,10 @@ namespace eval tcl { } } - # Set up the 'chan' ensemble (TIP #208). - namespace eval chan { - # TIP #219. Added methods: create, postevent. - namespace ensemble create -command ::chan -map { - blocked ::fblocked - close ::close - configure ::fconfigure - copy ::fcopy - create ::tcl::chan::rCreate - eof ::eof - event ::fileevent - flush ::flush - gets ::gets - names {::file channels} - postevent ::tcl::chan::rPostevent - puts ::puts - read ::read - seek ::seek - tell ::tell - truncate ::tcl::chan::Truncate - } - } - # TIP #255 min and max functions namespace eval mathfunc { proc min {args} { - if {[llength $args] == 0} { + if {![llength $args]} { return -code error \ "too few arguments to math function \"min\"" } @@ -112,12 +89,12 @@ namespace eval tcl { if {[catch {expr {double($arg)}} err]} { return -code error $err } - if {$arg < $val} { set val $arg } + if {$arg < $val} {set val $arg} } return $val } proc max {args} { - if {[llength $args] == 0} { + if {![llength $args]} { return -code error \ "too few arguments to math function \"max\"" } @@ -128,21 +105,25 @@ namespace eval tcl { if {[catch {expr {double($arg)}} err]} { return -code error $err } - if {$arg > $val} { set val $arg } + if {$arg > $val} {set val $arg} } return $val } + namespace export min max } } +namespace eval tcl::Pkg {} + # Windows specific end of initialization if {(![interp issafe]) && ($tcl_platform(platform) eq "windows")} { namespace eval tcl { proc EnvTraceProc {lo n1 n2 op} { - set x $::env($n2) - set ::env($lo) $x - set ::env([string toupper $lo]) $x + global env + set x $env($n2) + set env($lo) $x + set env([string toupper $lo]) $x } proc InitWinEnv {} { global env tcl_platform @@ -152,9 +133,9 @@ if {(![interp issafe]) && ($tcl_platform(platform) eq "windows")} { switch -- $u { COMSPEC - PATH { - if {![info exists env($u)]} { - set env($u) $env($p) - } + set temp $env($p) + unset env($p) + set env($u) $temp trace add variable env($p) write \ [namespace code [list EnvTraceProc $p]] trace add variable env($u) write \ @@ -164,11 +145,7 @@ if {(![interp issafe]) && ($tcl_platform(platform) eq "windows")} { } } if {![info exists env(COMSPEC)]} { - if {$tcl_platform(os) eq "Windows NT"} { - set env(COMSPEC) cmd.exe - } else { - set env(COMSPEC) command.com - } + set env(COMSPEC) cmd.exe } } InitWinEnv @@ -179,12 +156,12 @@ if {(![interp issafe]) && ($tcl_platform(platform) eq "windows")} { if {[interp issafe]} { - package unknown ::tclPkgUnknown + package unknown {::tcl::tm::UnknownHandler ::tclPkgUnknown} } else { # Set up search for Tcl Modules (TIP #189). # and setup platform specific unknown package handlers - if {$::tcl_platform(os) eq "Darwin" - && $::tcl_platform(platform) eq "unix"} { + if {$tcl_platform(os) eq "Darwin" + && $tcl_platform(platform) eq "unix"} { package unknown {::tcl::tm::UnknownHandler \ {::tcl::MacOSXPkgUnknown ::tclPkgUnknown}} } else { @@ -195,15 +172,9 @@ if {[interp issafe]} { namespace eval ::tcl::clock [list variable TclLibDir $::tcl_library] - proc clock args { - namespace eval ::tcl::clock [list namespace ensemble create -command \ - [uplevel 1 [list namespace origin [lindex [info level 0] 0]]] \ - -subcommands { - add clicks format microseconds milliseconds scan seconds - }] - + proc ::tcl::initClock {} { # Auto-loading stubs for 'clock.tcl' - + foreach cmd {add format scan} { proc ::tcl::clock::$cmd args { variable TclLibDir @@ -212,8 +183,9 @@ if {[interp issafe]} { } } - return [uplevel 1 [info level 0]] + rename ::tcl::initClock {} } + ::tcl::initClock } # Conditionalize for presence of exec. @@ -240,11 +212,9 @@ if {[namespace which -command tclLog] eq ""} { # exist in the interpreter. It takes the following steps to make the # command available: # -# 1. See if the command has the form "namespace inscope ns cmd" and -# if so, concatenate its arguments onto the end and evaluate it. -# 2. See if the autoload facility can locate the command in a +# 1. See if the autoload facility can locate the command in a # Tcl script file. If so, load it and execute it. -# 3. If the command was invoked interactively at top-level: +# 2. If the command was invoked interactively at top-level: # (a) see if the command exists as an executable UNIX program. # If so, "exec" the command. # (b) see if the command requests csh-like history substitution @@ -259,37 +229,29 @@ if {[namespace which -command tclLog] eq ""} { proc unknown args { variable ::tcl::UnknownPending - global auto_noexec auto_noload env tcl_interactive - - # If the command word has the form "namespace inscope ns cmd" - # then concatenate its arguments onto the end and evaluate it. + global auto_noexec auto_noload env tcl_interactive errorInfo errorCode - set cmd [lindex $args 0] - if {[regexp "^:*namespace\[ \t\n\]+inscope" $cmd] && [llength $cmd] == 4} { - #return -code error "You need an {expand}" - set arglist [lrange $args 1 end] - set ret [catch {uplevel 1 ::$cmd $arglist} result opts] - dict unset opts -errorinfo - dict incr opts -level - return -options $opts $result + if {[info exists errorInfo]} { + set savedErrorInfo $errorInfo + } + if {[info exists errorCode]} { + set savedErrorCode $errorCode } - catch {set savedErrorInfo $::errorInfo} - catch {set savedErrorCode $::errorCode} - set name $cmd + set name [lindex $args 0] if {![info exists auto_noload]} { # # Make sure we're not trying to load the same proc twice. # if {[info exists UnknownPending($name)]} { return -code error "self-referential recursion\ - in \"unknown\" for command \"$name\""; + in \"unknown\" for command \"$name\"" } - set UnknownPending($name) pending; + set UnknownPending($name) pending set ret [catch { auto_load $name [uplevel 1 {::namespace current}] } msg opts] - unset UnknownPending($name); + unset UnknownPending($name) if {$ret != 0} { dict append opts -errorinfo "\n (autoloading \"$name\")" return -options $opts $msg @@ -298,17 +260,25 @@ proc unknown args { unset UnknownPending } if {$msg} { - catch {set ::errorCode $savedErrorCode} - catch {set ::errorInfo $savedErrorInfo} + if {[info exists savedErrorCode]} { + set ::errorCode $savedErrorCode + } else { + unset -nocomplain ::errorCode + } + if {[info exists savedErrorInfo]} { + set errorInfo $savedErrorInfo + } else { + unset -nocomplain errorInfo + } set code [catch {uplevel 1 $args} msg opts] if {$code == 1} { # # Compute stack trace contribution from the [uplevel]. - # Note the dependence on how Tcl_AddErrorInfo, etc. + # Note the dependence on how Tcl_AddErrorInfo, etc. # construct the stack trace. # - set errorInfo [dict get $opts -errorinfo] - set errorCode [dict get $opts -errorcode] + set errInfo [dict get $opts -errorinfo] + set errCode [dict get $opts -errorcode] set cinfo $args if {[string bytelength $cinfo] > 150} { set cinfo [string range $cinfo 0 150] @@ -325,7 +295,7 @@ proc unknown args { # and trim the extra contribution from the matching case # set expect "$msg\n while executing\n\"$cinfo" - if {$errorInfo eq $expect} { + if {$errInfo eq $expect} { # # The stack has only the eval from the expanded command # Do not generate any stack trace here. @@ -340,18 +310,18 @@ proc unknown args { # set expect "\n invoked from within\n\"$cinfo" set exlen [string length $expect] - set eilen [string length $errorInfo] + set eilen [string length $errInfo] set i [expr {$eilen - $exlen - 1}] - set einfo [string range $errorInfo 0 $i] + set einfo [string range $errInfo 0 $i] # - # For now verify that $errorInfo consists of what we are about + # For now verify that $errInfo consists of what we are about # to return plus what we expected to trim off. # - if {$errorInfo ne "$einfo$expect"} { + if {$errInfo ne "$einfo$expect"} { error "Tcl bug: unexpected stack trace in \"unknown\"" {} \ - [list CORE UNKNOWN BADTRACE $einfo $expect $errorInfo] + [list CORE UNKNOWN BADTRACE $einfo $expect $errInfo] } - return -code error -errorcode $errorCode \ + return -code error -errorcode $errCode \ -errorinfo $einfo $msg } else { dict incr opts -level @@ -360,7 +330,7 @@ proc unknown args { } } - if {([info level] == 1) && ([info script] eq "") \ + if {([info level] == 1) && ([info script] eq "") && [info exists tcl_interactive] && $tcl_interactive} { if {![info exists auto_noexec]} { set new [auto_execok $name] @@ -402,20 +372,18 @@ proc unknown args { "\n (expanding command prefix \"$name\" in unknown)" return -options $opts $msg } - # Handle empty $name separately due to strangeness in [string first] - if {$name eq ""} { - if {[llength $candidates] != 1} { - return -code error "empty command name \"\"" - } - # It's not really possible to reach here. - return [uplevel 1 [lreplace $args 0 0 [lindex $candidates 0]]] - } # Filter out bogus matches when $name contained # a glob-special char [Bug 946952] - set cmds [list] - foreach x $candidates { - if {[string first $name $x] == 0} { - lappend cmds $x + if {$name eq ""} { + # Handle empty $name separately due to strangeness + # in [string first] (See RFE 1243354) + set cmds $candidates + } else { + set cmds [list] + foreach x $candidates { + if {[string first $name $x] == 0} { + lappend cmds $x + } } } if {[llength $cmds] == 1} { @@ -428,7 +396,8 @@ proc unknown args { return -code error "ambiguous command name \"$name\": [lsort $cmds]" } } - return -code error "invalid command name \"$name\"" + return -code error -errorcode [list TCL LOOKUP COMMAND $name] \ + "invalid command name \"$name\"" } # auto_load -- @@ -437,7 +406,7 @@ proc unknown args { # library file to create the procedure. Returns 1 if it successfully # loaded the procedure, 0 otherwise. # -# Arguments: +# Arguments: # cmd - Name of the command to find and load. # namespace (optional) The namespace where the command is being used - must be # a canonical namespace as returned [namespace current] @@ -461,7 +430,7 @@ proc auto_load {cmd {namespace {}}} { # info commands $name # Unfortunately, if the name has glob-magic chars in it like * # or [], it may not match. For our purposes here, a better - # route is to use + # route is to use # namespace which -command $name if {[namespace which -command $name] ne ""} { return 1 @@ -486,13 +455,29 @@ proc auto_load {cmd {namespace {}}} { return 0 } +# ::tcl::Pkg::source -- +# This procedure provides an alternative "source" command, which doesn't +# register the file for the "package files" command. Safe interpreters +# don't have to do anything special. +# +# Arguments: +# filename + +proc ::tcl::Pkg::source {filename} { + if {[interp issafe]} { + uplevel 1 [list ::source $filename] + } else { + uplevel 1 [list ::source -nopkg $filename] + } +} + # auto_load_index -- # Loads the contents of tclIndex files on the auto_path directory # list. This is usually invoked within auto_load to load the index # of available commands. Returns 1 if the index is loaded, and 0 if # the index is already loaded and up to date. # -# Arguments: +# Arguments: # None. proc auto_load_index {} { @@ -520,7 +505,7 @@ proc auto_load_index {} { set id [gets $f] if {$id eq "# Tcl autoload index file, version 2.0"} { eval [read $f] - } elseif {$id eq "# Tcl autoload index file: each line identifies a Tcl"]} { + } elseif {$id eq "# Tcl autoload index file: each line identifies a Tcl"} { while {[gets $f line] >= 0} { if {([string index $line 0] eq "#") \ || ([llength $line] != 2)} { @@ -528,7 +513,7 @@ proc auto_load_index {} { } set name [lindex $line 0] set auto_index($name) \ - "source [file join $dir [lindex $line 1]]" + "::tcl::Pkg::source [file join $dir [lindex $line 1]]" } } else { error "[file join $dir tclIndex] isn't a proper Tcl index file" @@ -571,34 +556,34 @@ proc auto_qualify {cmd namespace} { # Before each return case we give an example of which category it is # with the following form : - # ( inputCmd, inputNameSpace) -> output + # (inputCmd, inputNameSpace) -> output if {[string match ::* $cmd]} { if {$n > 1} { - # ( ::foo::bar , * ) -> ::foo::bar + # (::foo::bar , *) -> ::foo::bar return [list $cmd] } else { - # ( ::global , * ) -> global + # (::global , *) -> global return [list [string range $cmd 2 end]] } } - + # Potentially returning 2 elements to try : # (if the current namespace is not the global one) if {$n == 0} { if {$namespace eq "::"} { - # ( nocolons , :: ) -> nocolons + # (nocolons , ::) -> nocolons return [list $cmd] } else { - # ( nocolons , ::sub ) -> ::sub::nocolons nocolons + # (nocolons , ::sub) -> ::sub::nocolons nocolons return [list ${namespace}::$cmd $cmd] } } elseif {$namespace eq "::"} { - # ( foo::bar , :: ) -> ::foo::bar + # (foo::bar , ::) -> ::foo::bar return [list ::$cmd] } else { - # ( foo::bar , ::sub ) -> ::sub::foo::bar ::foo::bar + # (foo::bar , ::sub) -> ::sub::foo::bar ::foo::bar return [list ${namespace}::$cmd ::$cmd] } } @@ -640,13 +625,13 @@ proc auto_import {pattern} { # auto_execok -- # -# Returns string that indicates name of program to execute if +# Returns string that indicates name of program to execute if # name corresponds to a shell builtin or an executable in the -# Windows search path, or "" otherwise. Builds an associative -# array auto_execs that caches information about previous checks, +# Windows search path, or "" otherwise. Builds an associative +# array auto_execs that caches information about previous checks, # for speed. # -# Arguments: +# Arguments: # name - Name of a command. if {$tcl_platform(platform) eq "windows"} { @@ -665,20 +650,17 @@ proc auto_execok name { } set auto_execs($name) "" - set shellBuiltins [list cls copy date del erase dir echo mkdir \ - md rename ren rmdir rd time type ver vol] - if {$tcl_platform(os) eq "Windows NT"} { - # NT includes the 'start' built-in - lappend shellBuiltins "start" - } + set shellBuiltins [list assoc cls copy date del dir echo erase ftype \ + md mkdir mklink move rd ren rename rmdir start \ + time type ver vol] if {[info exists env(PATHEXT)]} { # Add an initial ; to have the {} extension check first. set execExtensions [split ";$env(PATHEXT)" ";"] } else { - set execExtensions [list {} .com .exe .bat] + set execExtensions [list {} .com .exe .bat .cmd] } - if {$name in $shellBuiltins} { + if {[string tolower $name] in $shellBuiltins} { # When this is command.com for some reason on Win2K, Tcl won't # exec it unless the case is right, which this corrects. COMSPEC # may not point to a real file, so do the check. @@ -701,7 +683,7 @@ proc auto_execok name { set path "[file dirname [info nameof]];.;" if {[info exists env(WINDIR)]} { - set windir $env(WINDIR) + set windir $env(WINDIR) } if {[info exists windir]} { if {$tcl_platform(os) eq "Windows NT"} { @@ -716,11 +698,14 @@ proc auto_execok name { } } - foreach dir [split $path {;}] { - # Skip already checked directories - if {[info exists checked($dir)] || ($dir eq {})} { continue } - set checked($dir) {} - foreach ext $execExtensions { + foreach ext $execExtensions { + unset -nocomplain checked + foreach dir [split $path {;}] { + # Skip already checked directories + if {[info exists checked($dir)] || ($dir eq "")} { + continue + } + set checked($dir) {} set file [file join $dir ${name}${ext}] if {[file exists $file] && ![file isdirectory $file]} { return [set auto_execs($name) [list $file]] @@ -766,13 +751,13 @@ proc auto_execok name { # This procedure is called by Tcl's core when attempts to call the # filesystem's copydirectory function fail. The semantics of the call # are that 'dest' does not yet exist, i.e. dest should become the exact -# image of src. If dest does exist, we throw an error. -# +# image of src. If dest does exist, we throw an error. +# # Note that making changes to this procedure can change the results # of running Tcl's tests. # -# Arguments: -# action - "renaming" or "copying" +# Arguments: +# action - "renaming" or "copying" # src - source directory # dest - destination directory proc tcl::CopyDirectory {action src dest} { @@ -800,7 +785,7 @@ proc tcl::CopyDirectory {action src dest} { # exists, then we should only call this function if -force # is true, which means we just want to over-write. So, # the following code is now commented out. - # + # # return -code error "error $action \"$src\" to\ # \"$dest\": file already exists" } else { @@ -809,10 +794,10 @@ proc tcl::CopyDirectory {action src dest} { # can be returned in various combinations. Anyway, # if any other file is returned, we must signal an error. set existing [glob -nocomplain -directory $dest * .*] - lappend existing {expand}[glob -nocomplain -directory $dest \ + lappend existing {*}[glob -nocomplain -directory $dest \ -type hidden * .*] foreach s $existing { - if {([file tail $s] ne ".") && ([file tail $s] ne "..")} { + if {[file tail $s] ni {. ..}} { return -code error "error $action \"$src\" to\ \"$dest\": file already exists" } @@ -820,7 +805,7 @@ proc tcl::CopyDirectory {action src dest} { } } else { if {[string first $nsrc $ndest] != -1} { - set srclen [expr {[llength [file split $nsrc]] -1}] + set srclen [expr {[llength [file split $nsrc]] - 1}] set ndest [lindex [file split $ndest] $srclen] if {$ndest eq [file tail $nsrc]} { return -code error "error $action \"$src\" to\ @@ -833,15 +818,15 @@ proc tcl::CopyDirectory {action src dest} { # Have to be careful to capture both visible and hidden files. # We will also be more generous to the file system and not # assume the hidden and non-hidden lists are non-overlapping. - # + # # On Unix 'hidden' files begin with '.'. On other platforms # or filesystems hidden files may have other interpretations. set filelist [concat [glob -nocomplain -directory $src *] \ [glob -nocomplain -directory $src -types hidden *]] foreach s [lsort -unique $filelist] { - if {([file tail $s] ne ".") && ([file tail $s] ne "..")} { - file copy -force $s [file join $dest [file tail $s]] + if {[file tail $s] ni {. ..}} { + file copy -force -- $s [file join $dest [file tail $s]] } } return |