head 1.1; branch 1.1.1; access ; symbols start:1.1.1.1 markom:1.1.1; locks ; strict; comment @# @; 1.1 date 2002.01.16.10.25.54; author markom; state Exp; branches 1.1.1.1; next ; 1.1.1.1 date 2002.01.16.10.25.54; author markom; state Exp; branches ; next ; desc @@ 1.1 log @Initial revision @ text @# safetk.tcl -- # # Support procs to use Tk in safe interpreters. # # SCCS: @@(#) safetk.tcl 1.8 97/10/29 14:59:16 # # Copyright (c) 1997 Sun Microsystems, Inc. # # See the file "license.terms" for information on usage and redistribution # of this file, and for a DISCLAIMER OF ALL WARRANTIES. # see safetk.n for documentation # # # Note: It is now ok to let untrusted code being executed # between the creation of the interp and the actual loading # of Tk in that interp because the C side Tk_Init will # now look up the master interp and ask its safe::TkInit # for the actual parameters to use for it's initialization (if allowed), # not relying on the slave state. # # We use opt (optional arguments parsing) package require opt 0.1; namespace eval ::safe { # counter for safe toplevels variable tkSafeId 0; # # tkInterpInit : prepare the slave interpreter for tk loading # most of the real job is done by loadTk # returns the slave name (tkInterpInit does) # proc ::safe::tkInterpInit {slave argv} { global env tk_library # Clear Tk's access for that interp (path). allowTk $slave $argv # there seems to be an obscure case where the tk_library # variable value is changed to point to a sym link destination # dir instead of the sym link itself, and thus where the $tk_library # would then not be anymore one of the auto_path dir, so we use # the addToAccessPath which adds if it's not already in instead # of the more conventional findInAccessPath. # Might be usefull for masters without Tk really loaded too. ::interp eval $slave [list set tk_library [::safe::interpAddToAccessPath $slave $tk_library]] return $slave; } # tkInterpLoadTk : # Do additional configuration as needed (calling tkInterpInit) # and actually load Tk into the slave. # # Either contained in the specified windowId (-use) or # creating a decorated toplevel for it. # empty definition for auto_mkIndex proc ::safe::loadTk {} {} ::tcl::OptProc loadTk { {slave -interp "name of the slave interpreter"} {-use -windowId {} "window Id to use (new toplevel otherwise)"} {-display -displayName {} "display name to use (current one otherwise)"} } { set displayGiven [::tcl::OptProcArgGiven "-display"] if {!$displayGiven} { # Try to get the current display from "." # (which might not exist if the master is tk-less) if {[catch {set display [winfo screen .]}]} { if {[info exists ::env(DISPLAY)]} { set display $::env(DISPLAY) } else { Log $slave "no winfo screen . nor env(DISPLAY)" WARNING set display ":0.0" } } } if {![::tcl::OptProcArgGiven "-use"]} { # create a decorated toplevel ::tcl::Lassign [tkTopLevel $slave $display] w use; # set our delete hook (slave arg is added by interpDelete) Set [DeleteHookName $slave] [list tkDelete {} $w]; } else { # Let's be nice and also accept tk window names instead of ids if {[string match ".*" $use]} { set windowName $use set use [winfo id $windowName] set nDisplay [winfo screen $windowName] } else { # Check for a better -display value # (works only for multi screens on single host, but not # cross hosts, for that a tk window name would be better # but embeding is also usefull for non tk names) if {![catch {winfo pathname $use} name]} { set nDisplay [winfo screen $name] } else { # Can't have a better one set nDisplay $display } } if {[string compare $nDisplay $display]} { if {$displayGiven} { error "conflicting -display $display and -use\ $use -> $nDisplay" } else { set display $nDisplay } } } # Prepares the slave for tk with those parameters tkInterpInit $slave [list "-use" $use "-display" $display] load {} Tk $slave return $slave } proc ::safe::TkInit {interpPath} { variable tkInit if {[info exists tkInit($interpPath)]} { set value $tkInit($interpPath) Log $interpPath "TkInit called, returning \"$value\"" NOTICE return $value } else { Log $interpPath "TkInit called for interp with clearance:\ preventing Tk init" ERROR error "not allowed" } } proc ::safe::allowTk {interpPath argv} { variable tkInit set tkInit($interpPath) $argv } proc ::safe::tkDelete {W window slave} { # we are going to be called for each widget... skip untill it's # top level Log $slave "Called tkDelete $W $window" NOTICE; if {[::interp exists $slave]} { if {[catch {::safe::interpDelete $slave} msg]} { Log $slave "Deletion error : $msg"; } } if {[winfo exists $window]} { Log $slave "Destroy toplevel $window" NOTICE; destroy $window; } } proc ::safe::tkTopLevel {slave display} { variable tkSafeId; incr tkSafeId; set w ".safe$tkSafeId"; if {[catch {toplevel $w -screen $display -class SafeTk} msg]} { return -code error "Unable to create toplevel for\ safe slave \"$slave\" ($msg)"; } Log $slave "New toplevel $w" NOTICE set msg "Untrusted Tcl applet ($slave)" wm title $w $msg; # Control frame set wc $w.fc frame $wc -bg red -borderwidth 3 -relief ridge ; # We will destroy the interp when the window is destroyed bindtags $wc [concat Safe$wc [bindtags $wc]] bind Safe$wc [list ::safe::tkDelete %W $w $slave]; label $wc.l -text $msg \ -padx 2 -pady 0 -anchor w; # We want the button to be the last visible item # (so be packed first) and at the right and not resizing horizontally # frame the button so it does not expand horizontally # but still have the default background instead of red one from the parent frame $wc.fb -bd 0 ; button $wc.fb.b -text "Delete" \ -bd 1 -padx 2 -pady 0 -highlightthickness 0 \ -command [list ::safe::tkDelete $w $w $slave] pack $wc.fb.b -side right -fill both ; pack $wc.fb -side right -fill both -expand 1; pack $wc.l -side left -fill both -expand 1; pack $wc -side bottom -fill x ; # Container frame frame $w.c -container 1; pack $w.c -fill both -expand 1; # return both the toplevel window name and the id to use for embedding list $w [winfo id $w.c] ; } } @ 1.1.1.1 log @Insight @ text @@