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Edit File : shell-1.1.4.tm \| Size : 5.84 KB
# -- tcl -- # ### ### ### ######### ######### ######### ## Overview # Higher-level commands which invoke the functionality of this package # for an arbitrary tcl shell (tclsh, wish, ...). This is required by a # repository as while the tcl shell executing packages uses the same # platform in general as a repository application there can be # differences in detail (i.e. 32/64 bit builds). # ### ### ### ######### ######### ######### ## Requirements package require platform namespace eval ::platform::shell {} # ### ### ### ######### ######### ######### ## Implementation # -- platform::shell::generic proc ::platform::shell::generic {shell} { # Argument is the path to a tcl shell. CHECK $shell LOCATE base out set code {} # Forget any pre-existing platform package, it might be in # conflict with this one. lappend code {package forget platform} # Inject our platform package lappend code [list source $base] # Query and print the architecture lappend code {puts [platform::generic]} # And done lappend code {exit 0} set arch [RUN $shell [join $code \n]] if {$out} {file delete -force $base} return $arch } # -- platform::shell::identify proc ::platform::shell::identify {shell} { # Argument is the path to a tcl shell. CHECK $shell LOCATE base out set code {} # Forget any pre-existing platform package, it might be in # conflict with this one. lappend code {package forget platform} # Inject our platform package lappend code [list source $base] # Query and print the architecture lappend code {puts [platform::identify]} # And done lappend code {exit 0} set arch [RUN $shell [join $code \n]] if {$out} {file delete -force $base} return $arch } # -- platform::shell::platform proc ::platform::shell::platform {shell} { # Argument is the path to a tcl shell. CHECK $shell set code {} lappend code {puts $tcl_platform(platform)} lappend code {exit 0} return [RUN $shell [join $code \n]] } # ### ### ### ######### ######### ######### ## Internal helper commands. proc ::platform::shell::CHECK {shell} { if {![file exists $shell]} { return -code error "Shell \"$shell\" does not exist" } if {![file executable $shell]} { return -code error "Shell \"$shell\" is not executable (permissions)" } return } proc ::platform::shell::LOCATE {bv ov} { upvar 1 $bv base $ov out # Locate the platform package for injection into the specified # shell. We are using package management to find it, whereever it # is, instead of using hardwired relative paths. This allows us to # install the two packages as TMs without breaking the code # here. If the found package is wrapped we copy the code somewhere # where the spawned shell will be able to read it. # This code is brittle, it needs has to adapt to whatever changes # are made to the TM code, i.e. the provide statement generated by # tm.tcl set pl [package ifneeded platform [package require platform]] set base [lindex $pl end] set out 0 if {[lindex [file system $base]] ne "native"} { set temp [TEMP] file copy -force $base $temp set base $temp set out 1 } return } proc ::platform::shell::RUN {shell code} { set c [TEMP] set cc [open $c w] puts $cc $code close $cc set e [TEMP] set code [catch { exec $shell $c 2> $e } res] file delete $c if {$code} { append res \n[read [set chan [open $e r]]][close $chan] file delete $e return -code error "Shell \"$shell\" is not executable ($res)" } file delete $e return $res } proc ::platform::shell::TEMP {} { set prefix platform # This code is copied out of Tcllib's fileutil package. # (TempFile/tempfile) set tmpdir [DIR] set chars "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" set nrand_chars 10 set maxtries 10 set access [list RDWR CREAT EXCL TRUNC] set permission 0600 set channel "" set checked_dir_writable 0 set mypid [pid] for {set i 0} {$i < $maxtries} {incr i} { set newname $prefix for {set j 0} {$j < $nrand_chars} {incr j} { append newname [string index $chars \ [expr {int(rand()*62)}]] } set newname [file join $tmpdir $newname] if {[file exists $newname]} { after 1 } else { if {[catch {open $newname $access $permission} channel]} { if {!$checked_dir_writable} { set dirname [file dirname $newname] if {![file writable $dirname]} { return -code error "Directory $dirname is not writable" } set checked_dir_writable 1 } } else { # Success close $channel return [file normalize $newname] } } } if {$channel ne ""} { return -code error "Failed to open a temporary file: $channel" } else { return -code error "Failed to find an unused temporary file name" } } proc ::platform::shell::DIR {} { # This code is copied out of Tcllib's fileutil package. # (TempDir/tempdir) global tcl_platform env set attempdirs [list] foreach tmp {TMPDIR TEMP TMP} { if { [info exists env($tmp)] } { lappend attempdirs $env($tmp) } } switch $tcl_platform(platform) { windows { lappend attempdirs "C:\\TEMP" "C:\\TMP" "\\TEMP" "\\TMP" } macintosh { set tmpdir $env(TRASH_FOLDER) ;# a better place? } default { lappend attempdirs \ [file join / tmp] \ [file join / var tmp] \ [file join / usr tmp] } } lappend attempdirs [pwd] foreach tmp $attempdirs { if { [file isdirectory $tmp] && [file writable $tmp] } { return [file normalize $tmp] } } # Fail if nothing worked. return -code error "Unable to determine a proper directory for temporary files" } # ### ### ### ######### ######### ######### ## Ready package provide platform::shell 1.1.4 Back

Edit File : shell-1.1.4.tm | Size : 5.84 KB

# -*- tcl -*-
# ### ### ### ######### ######### #########
## Overview

# Higher-level commands which invoke the functionality of this package
# for an arbitrary tcl shell (tclsh, wish, ...). This is required by a
# repository as while the tcl shell executing packages uses the same
# platform in general as a repository application there can be
# differences in detail (i.e. 32/64 bit builds).

# ### ### ### ######### ######### #########
## Requirements

package require platform
namespace eval ::platform::shell {}

# ### ### ### ######### ######### #########
## Implementation

# -- platform::shell::generic

proc ::platform::shell::generic {shell} {
    # Argument is the path to a tcl shell.

CHECK $shell
    LOCATE base out

set     code {}
    # Forget any pre-existing platform package, it might be in
    # conflict with this one.
    lappend code {package forget platform}
    # Inject our platform package
    lappend code [list source $base]
    # Query and print the architecture
    lappend code {puts [platform::generic]}
    # And done
    lappend code {exit 0}

set arch [RUN $shell [join $code \n]]

if {$out} {file delete -force $base}
    return $arch
}

# -- platform::shell::identify

proc ::platform::shell::identify {shell} {
    # Argument is the path to a tcl shell.

CHECK $shell
    LOCATE base out

set arch [RUN $shell [join $code \n]]

if {$out} {file delete -force $base}
    return $arch
}

# -- platform::shell::platform

proc ::platform::shell::platform {shell} {
    # Argument is the path to a tcl shell.

CHECK $shell

set     code {}
    lappend code {puts $tcl_platform(platform)}
    lappend code {exit 0}

return [RUN $shell [join $code \n]]
}

# ### ### ### ######### ######### #########
## Internal helper commands.

proc ::platform::shell::CHECK {shell} {
    if {![file exists $shell]} {
	return -code error "Shell \"$shell\" does not exist"
    }
    if {![file executable $shell]} {
	return -code error "Shell \"$shell\" is not executable (permissions)"
    }
    return
}

proc ::platform::shell::LOCATE {bv ov} {
    upvar 1 $bv base $ov out

# Locate the platform package for injection into the specified
    # shell. We are using package management to find it, whereever it
    # is, instead of using hardwired relative paths. This allows us to
    # install the two packages as TMs without breaking the code
    # here. If the found package is wrapped we copy the code somewhere
    # where the spawned shell will be able to read it.

# This code is brittle, it needs has to adapt to whatever changes
    # are made to the TM code, i.e. the provide statement generated by
    # tm.tcl

set pl [package ifneeded platform [package require platform]]
    set base [lindex $pl end]

set out 0
    if {[lindex [file system $base]] ne "native"} {
	set temp [TEMP]
	file copy -force $base $temp
	set base $temp
	set out 1
    }
    return
}

proc ::platform::shell::RUN {shell code} {
    set     c [TEMP]
    set    cc [open $c w]
    puts  $cc $code
    close $cc

set e [TEMP]

set code [catch {
        exec $shell $c 2> $e
    } res]

file delete $c

if {$code} {
	append res \n[read [set chan [open $e r]]][close $chan]
	file delete $e
	return -code error "Shell \"$shell\" is not executable ($res)"
    }

file delete $e
    return $res
}

proc ::platform::shell::TEMP {} {
    set prefix platform

# This code is copied out of Tcllib's fileutil package.
    # (TempFile/tempfile)

set tmpdir [DIR]

set chars "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
    set nrand_chars 10
    set maxtries 10
    set access [list RDWR CREAT EXCL TRUNC]
    set permission 0600
    set channel ""
    set checked_dir_writable 0
    set mypid [pid]
    for {set i 0} {$i < $maxtries} {incr i} {
 	set newname $prefix
 	for {set j 0} {$j < $nrand_chars} {incr j} {
 	    append newname [string index $chars \
		    [expr {int(rand()*62)}]]
 	}
	set newname [file join $tmpdir $newname]
 	if {[file exists $newname]} {
 	    after 1
 	} else {
 	    if {[catch {open $newname $access $permission} channel]} {
 		if {!$checked_dir_writable} {
 		    set dirname [file dirname $newname]
 		    if {![file writable $dirname]} {
 			return -code error "Directory $dirname is not writable"
 		    }
 		    set checked_dir_writable 1
 		}
 	    } else {
 		# Success
		close $channel
 		return [file normalize $newname]
 	    }
 	}
    }
    if {$channel ne ""} {
 	return -code error "Failed to open a temporary file: $channel"
    } else {
 	return -code error "Failed to find an unused temporary file name"
    }
}

proc ::platform::shell::DIR {} {
    # This code is copied out of Tcllib's fileutil package.
    # (TempDir/tempdir)

global tcl_platform env

set attempdirs [list]

foreach tmp {TMPDIR TEMP TMP} {
	if { [info exists env($tmp)] } {
	    lappend attempdirs $env($tmp)
	}
    }

switch $tcl_platform(platform) {
	windows {
	    lappend attempdirs "C:\\TEMP" "C:\\TMP" "\\TEMP" "\\TMP"
	}
	macintosh {
	    set tmpdir $env(TRASH_FOLDER)  ;# a better place?
	}
	default {
	    lappend attempdirs \
		[file join / tmp] \
		[file join / var tmp] \
		[file join / usr tmp]
	}
    }

lappend attempdirs [pwd]

foreach tmp $attempdirs {
	if { [file isdirectory $tmp] && [file writable $tmp] } {
	    return [file normalize $tmp]
	}
    }

# Fail if nothing worked.
    return -code error "Unable to determine a proper directory for temporary files"
}

# ### ### ### ######### ######### #########
## Ready

package provide platform::shell 1.1.4

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