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authorandreas_kupries <akupries@shaw.ca>2009-12-09 22:34:19 (GMT)
committerandreas_kupries <akupries@shaw.ca>2009-12-09 22:34:19 (GMT)
commit9e23933ebaeeedb220119fe64bba632844968d12 (patch)
tree0110d4772ac87caaf40b2c006417e38392914e11 /library/safe.tcl
parentb77de51584ea07a878656e5d88b87914d46c507e (diff)
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* library/safe.tcl: Backport of the streamlined safe base from
* tests/safe.test: head to the 8.5 branch (See head changelog entries 2009-11-05, 2009-11-06, 2009-12-03).
Diffstat (limited to 'library/safe.tcl')
-rw-r--r--library/safe.tcl1722
1 files changed, 850 insertions, 872 deletions
diff --git a/library/safe.tcl b/library/safe.tcl
index 8faa720..52b539b 100644
--- a/library/safe.tcl
+++ b/library/safe.tcl
@@ -9,1047 +9,1025 @@
#
# Copyright (c) 1996-1997 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 the file "license.terms" for information on usage and redistribution of
+# this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
-# RCS: @(#) $Id: safe.tcl,v 1.16.4.2 2009/11/04 04:47:59 dgp Exp $
+# RCS: @(#) $Id: safe.tcl,v 1.16.4.3 2009/12/09 22:34:20 andreas_kupries Exp $
#
-# The implementation is based on namespaces. These naming conventions
-# are followed:
+# The implementation is based on namespaces. These naming conventions are
+# followed:
# Private procs starts with uppercase.
# Public procs are exported and starts with lowercase
#
# Needed utilities package
-package require opt 0.4.1;
+package require opt 0.4.1
# Create the safe namespace
namespace eval ::safe {
-
# Exported API:
namespace export interpCreate interpInit interpConfigure interpDelete \
- interpAddToAccessPath interpFindInAccessPath setLogCmd
-
- ####
- #
- # Setup the arguments parsing
- #
- ####
-
- # Make sure that our temporary variable is local to this
- # namespace. [Bug 981733]
- variable temp
-
- # Share the descriptions
- set temp [::tcl::OptKeyRegister {
- {-accessPath -list {} "access path for the slave"}
- {-noStatics "prevent loading of statically linked pkgs"}
- {-statics true "loading of statically linked pkgs"}
- {-nestedLoadOk "allow nested loading"}
- {-nested false "nested loading"}
- {-deleteHook -script {} "delete hook"}
- }]
-
- # create case (slave is optional)
- ::tcl::OptKeyRegister {
- {?slave? -name {} "name of the slave (optional)"}
- } ::safe::interpCreate
- # adding the flags sub programs to the command program
- # (relying on Opt's internal implementation details)
- lappend ::tcl::OptDesc(::safe::interpCreate) $::tcl::OptDesc($temp)
-
- # init and configure (slave is needed)
- ::tcl::OptKeyRegister {
- {slave -name {} "name of the slave"}
- } ::safe::interpIC
- # adding the flags sub programs to the command program
- # (relying on Opt's internal implementation details)
- lappend ::tcl::OptDesc(::safe::interpIC) $::tcl::OptDesc($temp)
- # temp not needed anymore
- ::tcl::OptKeyDelete $temp
-
+ interpAddToAccessPath interpFindInAccessPath setLogCmd
+}
- # Helper function to resolve the dual way of specifying staticsok
- # (either by -noStatics or -statics 0)
- proc InterpStatics {} {
- foreach v {Args statics noStatics} {
- upvar $v $v
- }
- set flag [::tcl::OptProcArgGiven -noStatics];
- if {$flag && (!$noStatics == !$statics)
- && ([::tcl::OptProcArgGiven -statics])} {
- return -code error\
- "conflicting values given for -statics and -noStatics"
- }
- if {$flag} {
- return [expr {!$noStatics}]
- } else {
- return $statics
- }
+# Helper function to resolve the dual way of specifying staticsok (either
+# by -noStatics or -statics 0)
+proc ::safe::InterpStatics {} {
+ foreach v {Args statics noStatics} {
+ upvar $v $v
+ }
+ set flag [::tcl::OptProcArgGiven -noStatics]
+ if {$flag && (!$noStatics == !$statics)
+ && ([::tcl::OptProcArgGiven -statics])} {
+ return -code error\
+ "conflicting values given for -statics and -noStatics"
+ }
+ if {$flag} {
+ return [expr {!$noStatics}]
+ } else {
+ return $statics
}
+}
- # Helper function to resolve the dual way of specifying nested loading
- # (either by -nestedLoadOk or -nested 1)
- proc InterpNested {} {
- foreach v {Args nested nestedLoadOk} {
- upvar $v $v
- }
- set flag [::tcl::OptProcArgGiven -nestedLoadOk];
- # note that the test here is the opposite of the "InterpStatics"
- # one (it is not -noNested... because of the wanted default value)
- if {$flag && (!$nestedLoadOk != !$nested)
- && ([::tcl::OptProcArgGiven -nested])} {
- return -code error\
- "conflicting values given for -nested and -nestedLoadOk"
- }
- if {$flag} {
- # another difference with "InterpStatics"
- return $nestedLoadOk
- } else {
- return $nested
- }
+# Helper function to resolve the dual way of specifying nested loading
+# (either by -nestedLoadOk or -nested 1)
+proc ::safe::InterpNested {} {
+ foreach v {Args nested nestedLoadOk} {
+ upvar $v $v
+ }
+ set flag [::tcl::OptProcArgGiven -nestedLoadOk]
+ # note that the test here is the opposite of the "InterpStatics" one
+ # (it is not -noNested... because of the wanted default value)
+ if {$flag && (!$nestedLoadOk != !$nested)
+ && ([::tcl::OptProcArgGiven -nested])} {
+ return -code error\
+ "conflicting values given for -nested and -nestedLoadOk"
+ }
+ if {$flag} {
+ # another difference with "InterpStatics"
+ return $nestedLoadOk
+ } else {
+ return $nested
}
+}
- ####
- #
- # API entry points that needs argument parsing :
- #
- ####
+####
+#
+# API entry points that needs argument parsing :
+#
+####
+# Interface/entry point function and front end for "Create"
+proc ::safe::interpCreate {args} {
+ set Args [::tcl::OptKeyParse ::safe::interpCreate $args]
+ InterpCreate $slave $accessPath \
+ [InterpStatics] [InterpNested] $deleteHook
+}
- # Interface/entry point function and front end for "Create"
- proc interpCreate {args} {
- set Args [::tcl::OptKeyParse ::safe::interpCreate $args]
- InterpCreate $slave $accessPath \
- [InterpStatics] [InterpNested] $deleteHook
+proc ::safe::interpInit {args} {
+ set Args [::tcl::OptKeyParse ::safe::interpIC $args]
+ if {![::interp exists $slave]} {
+ return -code error "\"$slave\" is not an interpreter"
}
+ InterpInit $slave $accessPath \
+ [InterpStatics] [InterpNested] $deleteHook
+}
- proc interpInit {args} {
- set Args [::tcl::OptKeyParse ::safe::interpIC $args]
- if {![::interp exists $slave]} {
- return -code error "\"$slave\" is not an interpreter"
- }
- InterpInit $slave $accessPath \
- [InterpStatics] [InterpNested] $deleteHook;
+# Check that the given slave is "one of us"
+proc ::safe::CheckInterp {slave} {
+ namespace upvar ::safe S$slave state
+ if {![info exists state] || ![::interp exists $slave]} {
+ return -code error \
+ "\"$slave\" is not an interpreter managed by ::safe::"
}
+}
- proc CheckInterp {slave} {
- if {![IsInterp $slave]} {
- return -code error \
- "\"$slave\" is not an interpreter managed by ::safe::"
+# Interface/entry point function and front end for "Configure". This code
+# is awfully pedestrian because it would need more coupling and support
+# between the way we store the configuration values in safe::interp's and
+# the Opt package. Obviously we would like an OptConfigure to avoid
+# duplicating all this code everywhere.
+# -> TODO (the app should share or access easily the program/value stored
+# by opt)
+
+# This is even more complicated by the boolean flags with no values that
+# we had the bad idea to support for the sake of user simplicity in
+# create/init but which makes life hard in configure...
+# So this will be hopefully written and some integrated with opt1.0
+# (hopefully for tcl8.1 ?)
+proc ::safe::interpConfigure {args} {
+ switch [llength $args] {
+ 1 {
+ # If we have exactly 1 argument the semantic is to return all
+ # the current configuration. We still call OptKeyParse though
+ # we know that "slave" is our given argument because it also
+ # checks for the "-help" option.
+ set Args [::tcl::OptKeyParse ::safe::interpIC $args]
+ CheckInterp $slave
+ namespace upvar ::safe S$slave state
+
+ return [join [list \
+ [list -accessPath $state(access_path)] \
+ [list -statics $state(staticsok)] \
+ [list -nested $state(nestedok)] \
+ [list -deleteHook $state(cleanupHook)]]]
}
- }
-
- # Interface/entry point function and front end for "Configure"
- # This code is awfully pedestrian because it would need
- # more coupling and support between the way we store the
- # configuration values in safe::interp's and the Opt package
- # Obviously we would like an OptConfigure
- # to avoid duplicating all this code everywhere. -> TODO
- # (the app should share or access easily the program/value
- # stored by opt)
- # This is even more complicated by the boolean flags with no values
- # that we had the bad idea to support for the sake of user simplicity
- # in create/init but which makes life hard in configure...
- # So this will be hopefully written and some integrated with opt1.0
- # (hopefully for tcl8.1 ?)
- proc interpConfigure {args} {
- switch [llength $args] {
- 1 {
- # If we have exactly 1 argument
- # the semantic is to return all the current configuration
- # We still call OptKeyParse though we know that "slave"
- # is our given argument because it also checks
- # for the "-help" option.
- set Args [::tcl::OptKeyParse ::safe::interpIC $args]
- CheckInterp $slave
- set res {}
- lappend res [list -accessPath [Set [PathListName $slave]]]
- lappend res [list -statics [Set [StaticsOkName $slave]]]
- lappend res [list -nested [Set [NestedOkName $slave]]]
- lappend res [list -deleteHook [Set [DeleteHookName $slave]]]
- join $res
+ 2 {
+ # If we have exactly 2 arguments the semantic is a "configure
+ # get"
+ lassign $args slave arg
+
+ # get the flag sub program (we 'know' about Opt's internal
+ # representation of data)
+ set desc [lindex [::tcl::OptKeyGetDesc ::safe::interpIC] 2]
+ set hits [::tcl::OptHits desc $arg]
+ if {$hits > 1} {
+ return -code error [::tcl::OptAmbigous $desc $arg]
+ } elseif {$hits == 0} {
+ return -code error [::tcl::OptFlagUsage $desc $arg]
}
- 2 {
- # If we have exactly 2 arguments
- # the semantic is a "configure get"
- ::tcl::Lassign $args slave arg
- # get the flag sub program (we 'know' about Opt's internal
- # representation of data)
- set desc [lindex [::tcl::OptKeyGetDesc ::safe::interpIC] 2]
- set hits [::tcl::OptHits desc $arg]
- if {$hits > 1} {
- return -code error [::tcl::OptAmbigous $desc $arg]
- } elseif {$hits == 0} {
- return -code error [::tcl::OptFlagUsage $desc $arg]
- }
- CheckInterp $slave
- set item [::tcl::OptCurDesc $desc]
- set name [::tcl::OptName $item]
- switch -exact -- $name {
- -accessPath {
- return [list -accessPath [Set [PathListName $slave]]]
- }
- -statics {
- return [list -statics [Set [StaticsOkName $slave]]]
- }
- -nested {
- return [list -nested [Set [NestedOkName $slave]]]
- }
- -deleteHook {
- return [list -deleteHook [Set [DeleteHookName $slave]]]
- }
- -noStatics {
- # it is most probably a set in fact
- # but we would need then to jump to the set part
- # and it is not *sure* that it is a set action
- # that the user want, so force it to use the
- # unambigous -statics ?value? instead:
- return -code error\
- "ambigous query (get or set -noStatics ?)\
+ CheckInterp $slave
+ namespace upvar ::safe S$slave state
+
+ set item [::tcl::OptCurDesc $desc]
+ set name [::tcl::OptName $item]
+ switch -exact -- $name {
+ -accessPath {return [list -accessPath $state(access_path)]}
+ -statics {return [list -statics $state(staticsok)]}
+ -nested {return [list -nested $state(nestedok)]}
+ -deleteHook {return [list -deleteHook $state(cleanupHook)]}
+ -noStatics {
+ # it is most probably a set in fact but we would need
+ # then to jump to the set part and it is not *sure*
+ # that it is a set action that the user want, so force
+ # it to use the unambigous -statics ?value? instead:
+ return -code error\
+ "ambigous query (get or set -noStatics ?)\
use -statics instead"
- }
- -nestedLoadOk {
- return -code error\
- "ambigous query (get or set -nestedLoadOk ?)\
- use -nested instead"
- }
- default {
- return -code error "unknown flag $name (bug)"
- }
}
- }
- default {
- # Otherwise we want to parse the arguments like init and create
- # did
- set Args [::tcl::OptKeyParse ::safe::interpIC $args]
- CheckInterp $slave
- # Get the current (and not the default) values of
- # whatever has not been given:
- if {![::tcl::OptProcArgGiven -accessPath]} {
- set doreset 1
- set accessPath [Set [PathListName $slave]]
- } else {
- set doreset 0
+ -nestedLoadOk {
+ return -code error\
+ "ambigous query (get or set -nestedLoadOk ?)\
+ use -nested instead"
}
- if {(![::tcl::OptProcArgGiven -statics]) \
- && (![::tcl::OptProcArgGiven -noStatics]) } {
- set statics [Set [StaticsOkName $slave]]
- } else {
- set statics [InterpStatics]
+ default {
+ return -code error "unknown flag $name (bug)"
}
- if {([::tcl::OptProcArgGiven -nested]) \
- || ([::tcl::OptProcArgGiven -nestedLoadOk]) } {
- set nested [InterpNested]
+ }
+ }
+ default {
+ # Otherwise we want to parse the arguments like init and
+ # create did
+ set Args [::tcl::OptKeyParse ::safe::interpIC $args]
+ CheckInterp $slave
+ namespace upvar ::safe S$slave state
+
+ # Get the current (and not the default) values of whatever has
+ # not been given:
+ if {![::tcl::OptProcArgGiven -accessPath]} {
+ set doreset 1
+ set accessPath $state(access_path)
+ } else {
+ set doreset 0
+ }
+ if {
+ ![::tcl::OptProcArgGiven -statics]
+ && ![::tcl::OptProcArgGiven -noStatics]
+ } {
+ set statics $state(staticsok)
+ } else {
+ set statics [InterpStatics]
+ }
+ if {
+ [::tcl::OptProcArgGiven -nested] ||
+ [::tcl::OptProcArgGiven -nestedLoadOk]
+ } {
+ set nested [InterpNested]
+ } else {
+ set nested $state(nestedok)
+ }
+ if {![::tcl::OptProcArgGiven -deleteHook]} {
+ set deleteHook $state(cleanupHook)
+ }
+ # we can now reconfigure :
+ InterpSetConfig $slave $accessPath $statics $nested $deleteHook
+ # auto_reset the slave (to completly synch the new access_path)
+ if {$doreset} {
+ if {[catch {::interp eval $slave {auto_reset}} msg]} {
+ Log $slave "auto_reset failed: $msg"
} else {
- set nested [Set [NestedOkName $slave]]
- }
- if {![::tcl::OptProcArgGiven -deleteHook]} {
- set deleteHook [Set [DeleteHookName $slave]]
- }
- # we can now reconfigure :
- InterpSetConfig $slave $accessPath $statics $nested $deleteHook
- # auto_reset the slave (to completly synch the new access_path)
- if {$doreset} {
- if {[catch {::interp eval $slave {auto_reset}} msg]} {
- Log $slave "auto_reset failed: $msg"
- } else {
- Log $slave "successful auto_reset" NOTICE
- }
+ Log $slave "successful auto_reset" NOTICE
}
}
}
}
+}
+####
+#
+# Functions that actually implements the exported APIs
+#
+####
- ####
- #
- # Functions that actually implements the exported APIs
- #
- ####
-
-
- #
- # safe::InterpCreate : doing the real job
- #
- # This procedure creates a safe slave and initializes it with the
- # safe base aliases.
- # NB: slave name must be simple alphanumeric string, no spaces,
- # no (), no {},... {because the state array is stored as part of the name}
- #
- # Returns the slave name.
- #
- # Optional Arguments :
- # + slave name : if empty, generated name will be used
- # + access_path: path list controlling where load/source can occur,
- # if empty: the master auto_path will be used.
- # + staticsok : flag, if 0 :no static package can be loaded (load {} Xxx)
- # if 1 :static packages are ok.
- # + nestedok: flag, if 0 :no loading to sub-sub interps (load xx xx sub)
- # if 1 : multiple levels are ok.
-
- # use the full name and no indent so auto_mkIndex can find us
- proc ::safe::InterpCreate {
- slave
- access_path
- staticsok
- nestedok
- deletehook
- } {
- # Create the slave.
- if {$slave ne ""} {
- ::interp create -safe $slave
- } else {
- # empty argument: generate slave name
- set slave [::interp create -safe]
- }
- Log $slave "Created" NOTICE
-
- # Initialize it. (returns slave name)
- InterpInit $slave $access_path $staticsok $nestedok $deletehook
+#
+# safe::InterpCreate : doing the real job
+#
+# This procedure creates a safe slave and initializes it with the safe
+# base aliases.
+# NB: slave name must be simple alphanumeric string, no spaces, no (), no
+# {},... {because the state array is stored as part of the name}
+#
+# Returns the slave name.
+#
+# Optional Arguments :
+# + slave name : if empty, generated name will be used
+# + access_path: path list controlling where load/source can occur,
+# if empty: the master auto_path will be used.
+# + staticsok : flag, if 0 :no static package can be loaded (load {} Xxx)
+# if 1 :static packages are ok.
+# + nestedok: flag, if 0 :no loading to sub-sub interps (load xx xx sub)
+# if 1 : multiple levels are ok.
+
+# use the full name and no indent so auto_mkIndex can find us
+proc ::safe::InterpCreate {
+ slave
+ access_path
+ staticsok
+ nestedok
+ deletehook
+ } {
+ # Create the slave.
+ if {$slave ne ""} {
+ ::interp create -safe $slave
+ } else {
+ # empty argument: generate slave name
+ set slave [::interp create -safe]
}
+ Log $slave "Created" NOTICE
+ # Initialize it. (returns slave name)
+ InterpInit $slave $access_path $staticsok $nestedok $deletehook
+}
- #
- # InterpSetConfig (was setAccessPath) :
- # Sets up slave virtual auto_path and corresponding structure
- # within the master. Also sets the tcl_library in the slave
- # to be the first directory in the path.
- # Nb: If you change the path after the slave has been initialized
- # you probably need to call "auto_reset" in the slave in order that it
- # gets the right auto_index() array values.
-
- proc ::safe::InterpSetConfig {slave access_path staticsok\
- nestedok deletehook} {
-
- # determine and store the access path if empty
- if {$access_path eq ""} {
- set access_path [uplevel \#0 set auto_path]
- # Make sure that tcl_library is in auto_path
- # and at the first position (needed by setAccessPath)
- set where [lsearch -exact $access_path [info library]]
- if {$where == -1} {
- # not found, add it.
- set access_path [concat [list [info library]] $access_path]
- Log $slave "tcl_library was not in auto_path,\
+#
+# InterpSetConfig (was setAccessPath) :
+# Sets up slave virtual auto_path and corresponding structure within
+# the master. Also sets the tcl_library in the slave to be the first
+# directory in the path.
+# NB: If you change the path after the slave has been initialized you
+# probably need to call "auto_reset" in the slave in order that it gets
+# the right auto_index() array values.
+
+proc ::safe::InterpSetConfig {slave access_path staticsok nestedok deletehook} {
+ global auto_path
+
+ # determine and store the access path if empty
+ if {$access_path eq ""} {
+ set access_path $auto_path
+
+ # Make sure that tcl_library is in auto_path and at the first
+ # position (needed by setAccessPath)
+ set where [lsearch -exact $access_path [info library]]
+ if {$where == -1} {
+ # not found, add it.
+ set access_path [linsert $access_path 0 [info library]]
+ Log $slave "tcl_library was not in auto_path,\
added it to slave's access_path" NOTICE
- } elseif {$where != 0} {
- # not first, move it first
- set access_path [concat [list [info library]]\
- [lreplace $access_path $where $where]]
- Log $slave "tcl_libray was not in first in auto_path,\
+ } elseif {$where != 0} {
+ # not first, move it first
+ set access_path [linsert \
+ [lreplace $access_path $where $where] \
+ 0 [info library]]
+ Log $slave "tcl_libray was not in first in auto_path,\
moved it to front of slave's access_path" NOTICE
-
- }
-
- # Add 1st level sub dirs (will searched by auto loading from tcl
- # code in the slave using glob and thus fail, so we add them
- # here so by default it works the same).
- set access_path [AddSubDirs $access_path]
}
- Log $slave "Setting accessPath=($access_path) staticsok=$staticsok\
- nestedok=$nestedok deletehook=($deletehook)" NOTICE
+ # Add 1st level sub dirs (will searched by auto loading from tcl
+ # code in the slave using glob and thus fail, so we add them here
+ # so by default it works the same).
+ set access_path [AddSubDirs $access_path]
+ }
- # clear old autopath if it existed
- set nname [PathNumberName $slave]
- if {[Exists $nname]} {
- set n [Set $nname]
- for {set i 0} {$i<$n} {incr i} {
- Unset [PathToken $i $slave]
- }
- }
+ Log $slave "Setting accessPath=($access_path) staticsok=$staticsok\
+ nestedok=$nestedok deletehook=($deletehook)" NOTICE
- # build new one
- set slave_auto_path {}
- set i 0
- foreach dir $access_path {
- Set [PathToken $i $slave] $dir
- lappend slave_auto_path "\$[PathToken $i]"
- incr i
- }
- # Extend the access list with the paths used to look for Tcl
- # Modules. We safe the virtual form separately as well, as
- # syncing it with the slave has to be defered until the
- # necessary commands are present for setup.
-
- set morepaths [::tcl::tm::list]
- while {[llength $morepaths]} {
- set addpaths $morepaths
- set morepaths {}
-
- foreach dir $addpaths {
- lappend access_path $dir
- Set [PathToken $i $slave] $dir
- lappend slave_auto_path "\$[PathToken $i]"
- lappend slave_tm_path "\$[PathToken $i]"
- incr i
+ namespace upvar ::safe S$slave state
+
+ # clear old autopath if it existed
+ # build new one
+ # Extend the access list with the paths used to look for Tcl Modules.
+ # We save the virtual form separately as well, as syncing it with the
+ # slave has to be defered until the necessary commands are present for
+ # setup.
+
+ set norm_access_path {}
+ set slave_access_path {}
+ set map_access_path {}
+ set remap_access_path {}
+ set slave_tm_path {}
+
+ set i 0
+ foreach dir $access_path {
+ set token [PathToken $i]
+ lappend slave_access_path $token
+ lappend map_access_path $token $dir
+ lappend remap_access_path $dir $token
+ lappend norm_access_path [file normalize $dir]
+ incr i
+ }
- # [Bug 2854929]
- # Recursively find deeper paths which may contain
- # modules. Required to handle modules with names like
- # 'platform::shell', which translate into
- # 'platform/shell-X.tm', i.e arbitrarily deep
- # subdirectories. The catch prevents complaints when
- # no paths are added. Do nothing gracefully is 8.6+.
+ set morepaths [::tcl::tm::list]
+ while {[llength $morepaths]} {
+ set addpaths $morepaths
+ set morepaths {}
- catch {
- lappend morepaths {*}[glob -nocomplain -directory $dir -type d *]
- }
+ foreach dir $addpaths {
+ # Prevent the addition of dirs on the tm list to the
+ # result if they are already known.
+ if {[dict exists $remap_access_path $dir]} {
+ continue
}
- }
- Set [TmPathListName $slave] $slave_tm_path
- Set $nname $i
- Set [PathListName $slave] $access_path
- Set [VirtualPathListName $slave] $slave_auto_path
-
- Set [StaticsOkName $slave] $staticsok
- Set [NestedOkName $slave] $nestedok
- Set [DeleteHookName $slave] $deletehook
-
- SyncAccessPath $slave
- }
+ set token [PathToken $i]
+ lappend access_path $dir
+ lappend slave_access_path $token
+ lappend map_access_path $token $dir
+ lappend remap_access_path $dir $token
+ lappend norm_access_path [file normalize $dir]
+ lappend slave_tm_path $token
+ incr i
- #
- #
- # FindInAccessPath:
- # Search for a real directory and returns its virtual Id
- # (including the "$")
-proc ::safe::interpFindInAccessPath {slave path} {
- set access_path [GetAccessPath $slave]
- set where [lsearch -exact $access_path $path]
- if {$where == -1} {
- return -code error "$path not found in access path $access_path"
+ # [Bug 2854929]
+ # Recursively find deeper paths which may contain
+ # modules. Required to handle modules with names like
+ # 'platform::shell', which translate into
+ # 'platform/shell-X.tm', i.e arbitrarily deep
+ # subdirectories.
+ lappend morepaths {*}[glob -nocomplain -directory $dir -type d *]
}
- return "\$[PathToken $where]"
}
- #
- # addToAccessPath:
- # add (if needed) a real directory to access path
- # and return its virtual token (including the "$").
-proc ::safe::interpAddToAccessPath {slave path} {
- # first check if the directory is already in there
- if {![catch {interpFindInAccessPath $slave $path} res]} {
- return $res
- }
- # new one, add it:
- set nname [PathNumberName $slave]
- set n [Set $nname]
- Set [PathToken $n $slave] $path
-
- set token "\$[PathToken $n]"
-
- Lappend [VirtualPathListName $slave] $token
- Lappend [PathListName $slave] $path
- Set $nname [expr {$n+1}]
+ set state(access_path) $access_path
+ set state(access_path,map) $map_access_path
+ set state(access_path,remap) $remap_access_path
+ set state(access_path,norm) $norm_access_path
+ set state(access_path,slave) $slave_access_path
+ set state(tm_path_slave) $slave_tm_path
+ set state(staticsok) $staticsok
+ set state(nestedok) $nestedok
+ set state(cleanupHook) $deletehook
+
+ SyncAccessPath $slave
+}
- SyncAccessPath $slave
+#
+#
+# FindInAccessPath:
+# Search for a real directory and returns its virtual Id (including the
+# "$")
+proc ::safe::interpFindInAccessPath {slave path} {
+ namespace upvar ::safe S$slave state
- return $token
+ if {![dict exists $state(access_path,remap) $path]} {
+ return -code error "$path not found in access path $access_path"
}
- # This procedure applies the initializations to an already existing
- # interpreter. It is useful when you want to install the safe base
- # aliases into a preexisting safe interpreter.
- proc ::safe::InterpInit {
- slave
- access_path
- staticsok
- nestedok
- deletehook
- } {
-
- # Configure will generate an access_path when access_path is
- # empty.
- InterpSetConfig $slave $access_path $staticsok $nestedok $deletehook
-
- # These aliases let the slave load files to define new commands
-
- # NB we need to add [namespace current], aliases are always
- # absolute paths.
- ::interp alias $slave source {} [namespace current]::AliasSource $slave
- ::interp alias $slave load {} [namespace current]::AliasLoad $slave
-
- # This alias lets the slave use the encoding names, convertfrom,
- # convertto, and system, but not "encoding system <name>" to set
- # the system encoding.
-
- ::interp alias $slave encoding {} [namespace current]::AliasEncoding \
- $slave
+ return [dict get $state(access_path,remap) $path]
+}
- # Handling Tcl Modules, we need a restricted form of Glob.
- ::interp alias $slave glob {} [namespace current]::AliasGlob \
- $slave
+#
+# addToAccessPath:
+# add (if needed) a real directory to access path and return its
+# virtual token (including the "$").
+proc ::safe::interpAddToAccessPath {slave path} {
+ # first check if the directory is already in there
+ # (inlined interpFindInAccessPath).
+ namespace upvar ::safe S$slave state
- # This alias lets the slave have access to a subset of the 'file'
- # command functionality.
+ if {[dict exists $state(access_path,remap) $path]} {
+ return [dict get $state(access_path,remap) $path]
+ }
- AliasSubset $slave file file dir.* join root.* ext.* tail \
- path.* split
+ # new one, add it:
+ set token [PathToken [llength $state(access_path)]]
- # This alias interposes on the 'exit' command and cleanly terminates
- # the slave.
+ lappend state(access_path) $path
+ lappend state(access_path,slave) $token
+ lappend state(access_path,map) $token $path
+ lappend state(access_path,remap) $path $token
+ lappend state(access_path,norm) [file normalize $path]
- ::interp alias $slave exit {} [namespace current]::interpDelete $slave
+ SyncAccessPath $slave
+ return $token
+}
- # The allowed slave variables already have been set
- # by Tcl_MakeSafe(3)
+# This procedure applies the initializations to an already existing
+# interpreter. It is useful when you want to install the safe base aliases
+# into a preexisting safe interpreter.
+proc ::safe::InterpInit {
+ slave
+ access_path
+ staticsok
+ nestedok
+ deletehook
+ } {
+ # Configure will generate an access_path when access_path is empty.
+ InterpSetConfig $slave $access_path $staticsok $nestedok $deletehook
+
+ # NB we need to add [namespace current], aliases are always absolute
+ # paths.
+
+ # These aliases let the slave load files to define new commands
+ # This alias lets the slave use the encoding names, convertfrom,
+ # convertto, and system, but not "encoding system <name>" to set the
+ # system encoding.
+ # Handling Tcl Modules, we need a restricted form of Glob.
+ # This alias interposes on the 'exit' command and cleanly terminates
+ # the slave.
+
+ foreach {command alias} {
+ source AliasSource
+ load AliasLoad
+ encoding AliasEncoding
+ exit interpDelete
+ glob AliasGlob
+ } {
+ ::interp alias $slave $command {} [namespace current]::$alias $slave
+ }
+ # This alias lets the slave have access to a subset of the 'file'
+ # command functionality.
- # Source init.tcl and tm.tcl into the slave, to get auto_load
- # and other procedures defined:
+ AliasSubset $slave file \
+ file dir.* join root.* ext.* tail path.* split
- if {[catch {::interp eval $slave \
- {source [file join $tcl_library init.tcl]}} msg]} {
- Log $slave "can't source init.tcl ($msg)"
- error "can't source init.tcl into slave $slave ($msg)"
- }
+ # The allowed slave variables already have been set by Tcl_MakeSafe(3)
- if {[catch {::interp eval $slave \
- {source [file join $tcl_library tm.tcl]}} msg]} {
- Log $slave "can't source tm.tcl ($msg)"
- error "can't source tm.tcl into slave $slave ($msg)"
- }
+ # Source init.tcl and tm.tcl into the slave, to get auto_load and
+ # other procedures defined:
- # Sync the paths used to search for Tcl modules. This can be
- # done only now, after tm.tcl was loaded.
- ::interp eval $slave [list ::tcl::tm::add {*}[Set [TmPathListName $slave]]]
+ if {[catch {::interp eval $slave {
+ source [file join $tcl_library init.tcl]
+ }} msg]} {
+ Log $slave "can't source init.tcl ($msg)"
+ return -code error "can't source init.tcl into slave $slave ($msg)"
+ }
- return $slave
+ if {[catch {::interp eval $slave {
+ source [file join $tcl_library tm.tcl]
+ }} msg]} {
+ Log $slave "can't source tm.tcl ($msg)"
+ return -code error "can't source tm.tcl into slave $slave ($msg)"
}
+ # Sync the paths used to search for Tcl modules. This can be done only
+ # now, after tm.tcl was loaded.
+ namespace upvar ::safe S$slave state
+ ::interp eval $slave [list \
+ ::tcl::tm::add {*}$state(tm_path_slave)]
- # Add (only if needed, avoid duplicates) 1 level of
- # sub directories to an existing path list.
- # Also removes non directories from the returned list.
- proc AddSubDirs {pathList} {
- set res {}
- foreach dir $pathList {
- if {[file isdirectory $dir]} {
- # check that we don't have it yet as a children
- # of a previous dir
- if {[lsearch -exact $res $dir]<0} {
- lappend res $dir
- }
- foreach sub [glob -directory $dir -nocomplain *] {
- if {([file isdirectory $sub]) \
- && ([lsearch -exact $res $sub]<0) } {
- # new sub dir, add it !
- lappend res $sub
- }
+ return $slave
+}
+
+# Add (only if needed, avoid duplicates) 1 level of sub directories to an
+# existing path list. Also removes non directories from the returned
+# list.
+proc ::safe::AddSubDirs {pathList} {
+ set res {}
+ foreach dir $pathList {
+ if {[file isdirectory $dir]} {
+ # check that we don't have it yet as a children of a previous
+ # dir
+ if {$dir ni $res} {
+ lappend res $dir
+ }
+ foreach sub [glob -directory $dir -nocomplain *] {
+ if {[file isdirectory $sub] && ($sub ni $res)} {
+ # new sub dir, add it !
+ lappend res $sub
}
}
}
- return $res
}
+ return $res
+}
- # This procedure deletes a safe slave managed by Safe Tcl and
- # cleans up associated state:
+# This procedure deletes a safe slave managed by Safe Tcl and cleans up
+# associated state:
proc ::safe::interpDelete {slave} {
-
- Log $slave "About to delete" NOTICE
-
- # If the slave has a cleanup hook registered, call it.
- # check the existance because we might be called to delete an interp
- # which has not been registered with us at all
- set hookname [DeleteHookName $slave]
- if {[Exists $hookname]} {
- set hook [Set $hookname]
- if {![::tcl::Lempty $hook]} {
- # remove the hook now, otherwise if the hook
- # calls us somehow, we'll loop
- Unset $hookname
- if {[catch {{*}$hook $slave} err]} {
- Log $slave "Delete hook error ($err)"
- }
+ Log $slave "About to delete" NOTICE
+
+ namespace upvar ::safe S$slave state
+
+ # If the slave has a cleanup hook registered, call it. Check the
+ # existance because we might be called to delete an interp which has
+ # not been registered with us at all
+
+ if {[info exists state(cleanupHook)]} {
+ set hook $state(cleanupHook)
+ if {[llength $hook]} {
+ # remove the hook now, otherwise if the hook calls us somehow,
+ # we'll loop
+ unset state(cleanupHook)
+ if {[catch {
+ {*}$hook $slave
+ } err]} {
+ Log $slave "Delete hook error ($err)"
}
}
+ }
- # Discard the global array of state associated with the slave, and
- # delete the interpreter.
-
- set statename [InterpStateName $slave]
- if {[Exists $statename]} {
- Unset $statename
- }
+ # Discard the global array of state associated with the slave, and
+ # delete the interpreter.
- # if we have been called twice, the interp might have been deleted
- # already
- if {[::interp exists $slave]} {
- ::interp delete $slave
- Log $slave "Deleted" NOTICE
- }
+ if {[info exists state]} {
+ unset state
+ }
- return
+ # if we have been called twice, the interp might have been deleted
+ # already
+ if {[::interp exists $slave]} {
+ ::interp delete $slave
+ Log $slave "Deleted" NOTICE
}
- # Set (or get) the loging mecanism
+ return
+}
+
+# Set (or get) the logging mecanism
proc ::safe::setLogCmd {args} {
variable Log
- if {[llength $args] == 0} {
+ set la [llength $args]
+ if {$la == 0} {
return $Log
+ } elseif {$la == 1} {
+ set Log [lindex $args 0]
} else {
- if {[llength $args] == 1} {
- set Log [lindex $args 0]
- } else {
- set Log $args
+ set Log $args
+ }
+
+ if {$Log eq ""} {
+ # Disable logging completely. Calls to it will be compiled out
+ # of all users.
+ proc ::safe::Log {args} {}
+ } else {
+ # Activate logging, define proper command.
+
+ proc ::safe::Log {slave msg {type ERROR}} {
+ variable Log
+ {*}$Log "$type for slave $slave : $msg"
+ return
}
}
}
- # internal variable
- variable Log {}
+# ------------------- END OF PUBLIC METHODS ------------
- # ------------------- END OF PUBLIC METHODS ------------
+#
+# Sets the slave auto_path to the master recorded value. Also sets
+# tcl_library to the first token of the virtual path.
+#
+proc ::safe::SyncAccessPath {slave} {
+ namespace upvar ::safe S$slave state
+ set slave_access_path $state(access_path,slave)
+ ::interp eval $slave [list set auto_path $slave_access_path]
- #
- # sets the slave auto_path to the master recorded value.
- # also sets tcl_library to the first token of the virtual path.
- #
- proc SyncAccessPath {slave} {
- set slave_auto_path [Set [VirtualPathListName $slave]]
- ::interp eval $slave [list set auto_path $slave_auto_path]
- Log $slave "auto_path in $slave has been set to $slave_auto_path"\
- NOTICE
- ::interp eval $slave [list set tcl_library [lindex $slave_auto_path 0]]
- }
+ Log $slave "auto_path in $slave has been set to $slave_access_path"\
+ NOTICE
- # base name for storing all the slave states
- # the array variable name for slave foo is thus "Sfoo"
- # and for sub slave {foo bar} "Sfoo bar" (spaces are handled
- # ok everywhere (or should))
- # We add the S prefix to avoid that a slave interp called "Log"
- # would smash our "Log" variable.
- proc InterpStateName {slave} {
- return "S$slave"
- }
+ # This code assumes that info library is the first element in the
+ # list of auto_path's. See -> InterpSetConfig for the code which
+ # ensures this condition.
- # Check that the given slave is "one of us"
- proc IsInterp {slave} {
- expr {[Exists [InterpStateName $slave]] && [::interp exists $slave]}
- }
+ ::interp eval $slave [list \
+ set tcl_library [lindex $slave_access_path 0]]
+}
- # returns the virtual token for directory number N
- # if the slave argument is given,
- # it will return the corresponding master global variable name
- proc PathToken {n {slave ""}} {
- if {$slave ne ""} {
- return "[InterpStateName $slave](access_path,$n)"
- } else {
- # We need to have a ":" in the token string so
- # [file join] on the mac won't turn it into a relative
- # path.
- return "p(:$n:)"
- }
- }
- # returns the variable name of the complete path list
- proc PathListName {slave} {
- return "[InterpStateName $slave](access_path)"
- }
- # returns the variable name of the complete path list
- proc VirtualPathListName {slave} {
- return "[InterpStateName $slave](access_path_slave)"
- }
- # returns the variable name of the complete tm path list
- proc TmPathListName {slave} {
- return "[InterpStateName $slave](tm_path_slave)"
- }
- # returns the variable name of the number of items
- proc PathNumberName {slave} {
- return "[InterpStateName $slave](access_path,n)"
- }
- # returns the staticsok flag var name
- proc StaticsOkName {slave} {
- return "[InterpStateName $slave](staticsok)"
- }
- # returns the nestedok flag var name
- proc NestedOkName {slave} {
- return "[InterpStateName $slave](nestedok)"
- }
- # Run some code at the namespace toplevel
- proc Toplevel {args} {
- namespace eval [namespace current] $args
- }
- # set/get values
- proc Set {args} {
- Toplevel set {*}$args
- }
- # lappend on toplevel vars
- proc Lappend {args} {
- Toplevel lappend {*}$args
- }
- # unset a var/token (currently just an global level eval)
- proc Unset {args} {
- Toplevel unset {*}$args
- }
- # test existance
- proc Exists {varname} {
- Toplevel info exists $varname
- }
- # short cut for access path getting
- proc GetAccessPath {slave} {
- Set [PathListName $slave]
- }
- # short cut for statics ok flag getting
- proc StaticsOk {slave} {
- Set [StaticsOkName $slave]
- }
- # short cut for getting the multiples interps sub loading ok flag
- proc NestedOk {slave} {
- Set [NestedOkName $slave]
- }
- # interp deletion storing hook name
- proc DeleteHookName {slave} {
- return [InterpStateName $slave](cleanupHook)
+# Returns the virtual token for directory number N.
+proc ::safe::PathToken {n} {
+ # We need to have a ":" in the token string so [file join] on the
+ # mac won't turn it into a relative path.
+ return "\$p(:$n:)" ;# Form tested by case 7.2
+}
+
+#
+# translate virtual path into real path
+#
+proc ::safe::TranslatePath {slave path} {
+ namespace upvar ::safe S$slave state
+
+ # somehow strip the namespaces 'functionality' out (the danger is that
+ # we would strip valid macintosh "../" queries... :
+ if {[string match "*::*" $path] || [string match "*..*" $path]} {
+ return -code error "invalid characters in path $path"
}
- #
- # translate virtual path into real path
- #
- proc TranslatePath {slave path} {
- # somehow strip the namespaces 'functionality' out (the danger
- # is that we would strip valid macintosh "../" queries... :
- if {[string match "*::*" $path] || [string match "*..*" $path]} {
- error "invalid characters in path $path"
- }
- set n [expr {[Set [PathNumberName $slave]]-1}]
- for {} {$n>=0} {incr n -1} {
- # fill the token virtual names with their real value
- set [PathToken $n] [Set [PathToken $n $slave]]
- }
- # replaces the token by their value
- subst -nobackslashes -nocommands $path
+ # Use a cached map instead of computed local vars and subst.
+
+ return [string map $state(access_path,map) $path]
+}
+
+# file name control (limit access to files/resources that should be a
+# valid tcl source file)
+proc ::safe::CheckFileName {slave file} {
+ # This used to limit what can be sourced to ".tcl" and forbid files
+ # with more than 1 dot and longer than 14 chars, but I changed that
+ # for 8.4 as a safe interp has enough internal protection already to
+ # allow sourcing anything. - hobbs
+
+ if {![file exists $file]} {
+ # don't tell the file path
+ return -code error "no such file or directory"
}
+ if {![file readable $file]} {
+ # don't tell the file path
+ return -code error "not readable"
+ }
+}
- # Log eventually log an error
- # to enable error logging, set Log to {puts stderr} for instance
- proc Log {slave msg {type ERROR}} {
- variable Log
- if {[info exists Log] && [llength $Log]} {
- {*}$Log "$type for slave $slave : $msg"
+# AliasGlob is the target of the "glob" alias in safe interpreters.
+proc ::safe::AliasGlob {slave args} {
+ Log $slave "GLOB ! $args" NOTICE
+ set cmd {}
+ set at 0
+
+ set dir {}
+ set virtualdir {}
+
+ while {$at < [llength $args]} {
+ switch -glob -- [set opt [lindex $args $at]] {
+ -nocomplain -
+ -join {
+ lappend cmd $opt
+ incr at
+ }
+ -directory {
+ set virtualdir [lindex $args [incr at]]
+ # Get the real path from the virtual one and check that the
+ # path is in the access path of that slave.
+ try {
+ set dir [TranslatePath $slave $virtualdir]
+ DirInAccessPath $slave $dir
+ } on error msg {
+ Log $slave $msg
+ return -code error "permission denied"
+ }
+ lappend cmd -directory $dir
+ incr at
+ }
+ pkgIndex.tcl {
+ # Oops, this is globbing a subdirectory in regular package
+ # search. That is not wanted. Abort, handler does catch
+ # already (because glob was not defined before). See
+ # package.tcl, lines 484ff in tclPkgUnknown.
+ return -code error "unknown command glob"
+ }
+ -* {
+ Log $slave "Safe base rejecting glob option '$opt'"
+ return -code error "Safe base rejecting glob option '$opt'"
+ }
+ default {
+ if {[regexp {(.*)[\\/]} $opt -> thedir]} {
+ try {
+ DirInAccessPath $slave [TranslatePath $slave $thedir]
+ } on error msg {
+ Log $slave $msg
+ return -code error "permission denied"
+ }
+ }
+ lappend cmd $opt
+ incr at
+ }
}
}
+ Log $slave "GLOB = $cmd" NOTICE
- # file name control (limit access to files/ressources that should be
- # a valid tcl source file)
- proc CheckFileName {slave file} {
- # This used to limit what can be sourced to ".tcl" and forbid files
- # with more than 1 dot and longer than 14 chars, but I changed that
- # for 8.4 as a safe interp has enough internal protection already
- # to allow sourcing anything. - hobbs
+ if {[catch {
+ ::interp invokehidden $slave glob {*}$cmd
+ } msg]} {
+ Log $slave $msg
+ return -code error "script error"
+ }
- if {![file exists $file]} {
- # don't tell the file path
- error "no such file or directory"
- }
+ Log $slave "GLOB @ $msg" NOTICE
- if {![file readable $file]} {
- # don't tell the file path
- error "not readable"
- }
+ # Translate path back to what the slave should see.
+ set res {}
+ foreach p $msg {
+ regsub -- ^$dir $p $virtualdir p
+ lappend res $p
}
- # AliasGlob is the target of the "glob" alias in safe interpreters.
+ Log $slave "GLOB @ $res" NOTICE
+ return $res
+}
+
+# AliasSource is the target of the "source" alias in safe interpreters.
- proc AliasGlob {slave args} {
- Log $slave "GLOB ! $args" NOTICE
- set cmd {}
+proc ::safe::AliasSource {slave args} {
+ set argc [llength $args]
+ # Extended for handling of Tcl Modules to allow not only "source
+ # filename", but "source -encoding E filename" as well.
+ if {[lindex $args 0] eq "-encoding"} {
+ incr argc -2
+ set encoding [lrange $args 0 1]
+ set at 2
+ } else {
set at 0
+ set encoding {}
+ }
+ if {$argc != 1} {
+ set msg "wrong # args: should be \"source ?-encoding E? fileName\""
+ Log $slave "$msg ($args)"
+ return -code error $msg
+ }
+ set file [lindex $args $at]
+
+ # get the real path from the virtual one.
+ if {[catch {
+ set file [TranslatePath $slave $file]
+ } msg]} {
+ Log $slave $msg
+ return -code error "permission denied"
+ }
+
+ # check that the path is in the access path of that slave
+ if {[catch {
+ FileInAccessPath $slave $file
+ } msg]} {
+ Log $slave $msg
+ return -code error "permission denied"
+ }
- set dir {}
- set virtualdir {}
+ # do the checks on the filename :
+ if {[catch {
+ CheckFileName $slave $file
+ } msg]} {
+ Log $slave "$file:$msg"
+ return -code error $msg
+ }
- while {$at < [llength $args]} {
- switch -glob -- [set opt [lindex $args $at]] {
- -nocomplain -
- -join { lappend cmd $opt ; incr at }
- -directory {
- lappend cmd $opt ; incr at
- set virtualdir [lindex $args $at]
+ # passed all the tests , lets source it:
+ if {[catch {
+ # We use catch here because we want to catch non-error/ok too
+ ::interp invokehidden $slave source {*}$encoding $file
+ } msg]} {
+ Log $slave $msg
+ return -code error "script error"
+ }
+ return $msg
+}
- # get the real path from the virtual one.
- if {[catch {set dir [TranslatePath $slave $virtualdir]} msg]} {
- Log $slave $msg
- return -code error "permission denied"
- }
- # check that the path is in the access path of that slave
- if {[catch {DirInAccessPath $slave $dir} msg]} {
- Log $slave $msg
- return -code error "permission denied"
- }
- lappend cmd $dir ; incr at
- }
- pkgIndex.tcl {
- # Oops, this is globbing a subdirectory in regular
- # package search. That is not wanted. Abort,
- # handler does catch already (because glob was not
- # defined before). See package.tcl, lines 484ff in
- # tclPkgUnknown.
- error "unknown command glob"
- }
- -* {
- Log $slave "Safe base rejecting glob option '$opt'"
- error "Safe base rejecting glob option '$opt'"
- }
- default {
- lappend cmd $opt ; incr at
- }
- }
- }
+# AliasLoad is the target of the "load" alias in safe interpreters.
- Log $slave "GLOB = $cmd" NOTICE
+proc ::safe::AliasLoad {slave file args} {
+ set argc [llength $args]
+ if {$argc > 2} {
+ set msg "load error: too many arguments"
+ Log $slave "$msg ($argc) {$file $args}"
+ return -code error $msg
+ }
- if {[catch {::interp invokehidden $slave glob {*}$cmd} msg]} {
- Log $slave $msg
- return -code error "script error"
- }
+ # package name (can be empty if file is not).
+ set package [lindex $args 0]
- Log $slave "GLOB @ $msg" NOTICE
+ namespace upvar ::safe S$slave state
- # Translate path back to what the slave should see.
- set res {}
- foreach p $msg {
- regsub -- ^$dir $p $virtualdir p
- lappend res $p
+ # Determine where to load. load use a relative interp path and {}
+ # means self, so we can directly and safely use passed arg.
+ set target [lindex $args 1]
+ if {$target ne ""} {
+ # we will try to load into a sub sub interp; check that we want to
+ # authorize that.
+ if {!$state(nestedok)} {
+ Log $slave "loading to a sub interp (nestedok)\
+ disabled (trying to load $package to $target)"
+ return -code error "permission denied (nested load)"
}
-
- Log $slave "GLOB @ $res" NOTICE
- return $res
}
- # AliasSource is the target of the "source" alias in safe interpreters.
-
- proc AliasSource {slave args} {
-
- set argc [llength $args]
- # Extended for handling of Tcl Modules to allow not only
- # "source filename", but "source -encoding E filename" as
- # well.
- if {[lindex $args 0] eq "-encoding"} {
- incr argc -2
- set encoding [lrange $args 0 1]
- set at 2
- } else {
- set at 0
- set encoding {}
- }
- if {$argc != 1} {
- set msg "wrong # args: should be \"source ?-encoding E? fileName\""
- Log $slave "$msg ($args)"
+ # Determine what kind of load is requested
+ if {$file eq ""} {
+ # static package loading
+ if {$package eq ""} {
+ set msg "load error: empty filename and no package name"
+ Log $slave $msg
return -code error $msg
}
- set file [lindex $args $at]
-
- # get the real path from the virtual one.
- if {[catch {set file [TranslatePath $slave $file]} msg]} {
- Log $slave $msg
- return -code error "permission denied"
+ if {!$state(staticsok)} {
+ Log $slave "static packages loading disabled\
+ (trying to load $package to $target)"
+ return -code error "permission denied (static package)"
}
-
- # check that the path is in the access path of that slave
- if {[catch {FileInAccessPath $slave $file} msg]} {
+ } else {
+ # file loading
+
+ # get the real path from the virtual one.
+ if {[catch {
+ set file [TranslatePath $slave $file]
+ } msg]} {
Log $slave $msg
return -code error "permission denied"
}
- # do the checks on the filename :
- if {[catch {CheckFileName $slave $file} msg]} {
- Log $slave "$file:$msg"
- return -code error $msg
- }
-
- # passed all the tests , lets source it:
- if {[catch {::interp invokehidden $slave source {*}$encoding $file} msg]} {
+ # check the translated path
+ if {[catch {
+ FileInAccessPath $slave $file
+ } msg]} {
Log $slave $msg
- return -code error "script error"
+ return -code error "permission denied (path)"
}
- return $msg
}
- # AliasLoad is the target of the "load" alias in safe interpreters.
+ if {[catch {
+ ::interp invokehidden $slave load $file $package $target
+ } msg]} {
+ Log $slave $msg
+ return -code error $msg
+ }
- proc AliasLoad {slave file args} {
+ return $msg
+}
- set argc [llength $args]
- if {$argc > 2} {
- set msg "load error: too many arguments"
- Log $slave "$msg ($argc) {$file $args}"
- return -code error $msg
- }
+# FileInAccessPath raises an error if the file is not found in the list of
+# directories contained in the (master side recorded) slave's access path.
- # package name (can be empty if file is not).
- set package [lindex $args 0]
-
- # Determine where to load. load use a relative interp path
- # and {} means self, so we can directly and safely use passed arg.
- set target [lindex $args 1]
- if {$target ne ""} {
- # we will try to load into a sub sub interp
- # check that we want to authorize that.
- if {![NestedOk $slave]} {
- Log $slave "loading to a sub interp (nestedok)\
- disabled (trying to load $package to $target)"
- return -code error "permission denied (nested load)"
- }
-
- }
+# the security here relies on "file dirname" answering the proper
+# result... needs checking ?
+proc ::safe::FileInAccessPath {slave file} {
+ namespace upvar ::safe S$slave state
+ set access_path $state(access_path)
- # Determine what kind of load is requested
- if {$file eq ""} {
- # static package loading
- if {$package eq ""} {
- set msg "load error: empty filename and no package name"
- Log $slave $msg
- return -code error $msg
- }
- if {![StaticsOk $slave]} {
- Log $slave "static packages loading disabled\
- (trying to load $package to $target)"
- return -code error "permission denied (static package)"
- }
- } else {
- # file loading
-
- # get the real path from the virtual one.
- if {[catch {set file [TranslatePath $slave $file]} msg]} {
- Log $slave $msg
- return -code error "permission denied"
- }
-
- # check the translated path
- if {[catch {FileInAccessPath $slave $file} msg]} {
- Log $slave $msg
- return -code error "permission denied (path)"
- }
- }
+ if {[file isdirectory $file]} {
+ return -code error "\"$file\": is a directory"
+ }
+ set parent [file dirname $file]
- if {[catch {::interp invokehidden\
- $slave load $file $package $target} msg]} {
- Log $slave $msg
- return -code error $msg
- }
+ # Normalize paths for comparison since lsearch knows nothing of
+ # potential pathname anomalies.
+ set norm_parent [file normalize $parent]
- return $msg
+ namespace upvar ::safe S$slave state
+ if {$norm_parent ni $state(access_path,norm)} {
+ return -code error "\"$file\": not in access_path"
}
+}
- # FileInAccessPath raises an error if the file is not found in
- # the list of directories contained in the (master side recorded) slave's
- # access path.
+proc ::safe::DirInAccessPath {slave dir} {
+ namespace upvar ::safe S$slave state
+ set access_path $state(access_path)
- # the security here relies on "file dirname" answering the proper
- # result.... needs checking ?
- proc FileInAccessPath {slave file} {
+ if {[file isfile $dir]} {
+ return -code error "\"$dir\": is a file"
+ }
- set access_path [GetAccessPath $slave]
+ # Normalize paths for comparison since lsearch knows nothing of
+ # potential pathname anomalies.
+ set norm_dir [file normalize $dir]
- if {[file isdirectory $file]} {
- error "\"$file\": is a directory"
- }
- set parent [file dirname $file]
+ namespace upvar ::safe S$slave state
+ if {$norm_dir ni $state(access_path,norm)} {
+ return -code error "\"$dir\": not in access_path"
+ }
+}
- # Normalize paths for comparison since lsearch knows nothing of
- # potential pathname anomalies.
- set norm_parent [file normalize $parent]
- foreach path $access_path {
- lappend norm_access_path [file normalize $path]
- }
+# This procedure enables access from a safe interpreter to only a subset
+# of the subcommands of a command:
- if {[lsearch -exact $norm_access_path $norm_parent] == -1} {
- error "\"$file\": not in access_path"
- }
+proc ::safe::Subset {slave command okpat args} {
+ set subcommand [lindex $args 0]
+ if {[regexp $okpat $subcommand]} {
+ return [$command {*}$args]
}
+ set msg "not allowed to invoke subcommand $subcommand of $command"
+ Log $slave $msg
+ return -code error $msg
+}
- proc DirInAccessPath {slave dir} {
- set access_path [GetAccessPath $slave]
+# This procedure installs an alias in a slave that invokes "safesubset" in
+# the master to execute allowed subcommands. It precomputes the pattern of
+# allowed subcommands; you can use wildcards in the pattern if you wish to
+# allow subcommand abbreviation.
+#
+# Syntax is: AliasSubset slave alias target subcommand1 subcommand2...
- if {[file isfile $dir]} {
- error "\"$dir\": is a file"
- }
+proc ::safe::AliasSubset {slave alias target args} {
+ set pat "^([join $args |])\$"
+ ::interp alias $slave $alias {}\
+ [namespace current]::Subset $slave $target $pat
+}
- # Normalize paths for comparison since lsearch knows nothing of
- # potential pathname anomalies.
- set norm_dir [file normalize $dir]
- foreach path $access_path {
- lappend norm_access_path [file normalize $path]
- }
+# AliasEncoding is the target of the "encoding" alias in safe interpreters.
- if {[lsearch -exact $norm_access_path $norm_dir] == -1} {
- error "\"$dir\": not in access_path"
- }
+proc ::safe::AliasEncoding {slave option args} {
+ # Careful; do not want empty option to get through to the [string equal]
+ if {[regexp {^(name.*|convert.*|)$} $option]} {
+ return [::interp invokehidden $slave encoding $option {*}$args]
}
- # This procedure enables access from a safe interpreter to only a subset of
- # the subcommands of a command:
-
- proc Subset {slave command okpat args} {
- set subcommand [lindex $args 0]
- if {[regexp $okpat $subcommand]} {
- return [$command {*}$args]
+ if {[string equal -length [string length $option] $option "system"]} {
+ if {[llength $args] == 0} {
+ # passed all the tests , lets source it:
+ if {[catch {
+ set sysenc [::interp invokehidden $slave encoding system]
+ } msg]} {
+ Log $slave $msg
+ return -code error "script error"
+ }
+ return $sysenc
}
- set msg "not allowed to invoke subcommand $subcommand of $command"
- Log $slave $msg
- error $msg
+ set msg "wrong # args: should be \"encoding system\""
+ set code {TCL WRONGARGS}
+ } else {
+ set msg "bad option \"$option\": must be convertfrom, convertto, names, or system"
+ set code [list TCL LOOKUP INDEX option $option]
}
+ Log $slave $msg
+ return -code error -errorcode $code $msg
+}
+
- # This procedure installs an alias in a slave that invokes "safesubset"
- # in the master to execute allowed subcommands. It precomputes the pattern
- # of allowed subcommands; you can use wildcards in the pattern if you wish
- # to allow subcommand abbreviation.
+proc ::safe::Setup {} {
+ ####
+ #
+ # Setup the arguments parsing
#
- # Syntax is: AliasSubset slave alias target subcommand1 subcommand2...
+ ####
- proc AliasSubset {slave alias target args} {
- set pat ^(; set sep ""
- foreach sub $args {
- append pat $sep$sub
- set sep |
- }
- append pat )\$
- ::interp alias $slave $alias {}\
- [namespace current]::Subset $slave $target $pat
- }
+ # Share the descriptions
+ set temp [::tcl::OptKeyRegister {
+ {-accessPath -list {} "access path for the slave"}
+ {-noStatics "prevent loading of statically linked pkgs"}
+ {-statics true "loading of statically linked pkgs"}
+ {-nestedLoadOk "allow nested loading"}
+ {-nested false "nested loading"}
+ {-deleteHook -script {} "delete hook"}
+ }]
- # AliasEncoding is the target of the "encoding" alias in safe interpreters.
+ # create case (slave is optional)
+ ::tcl::OptKeyRegister {
+ {?slave? -name {} "name of the slave (optional)"}
+ } ::safe::interpCreate
- proc AliasEncoding {slave args} {
+ # adding the flags sub programs to the command program (relying on Opt's
+ # internal implementation details)
+ lappend ::tcl::OptDesc(::safe::interpCreate) $::tcl::OptDesc($temp)
- set argc [llength $args]
+ # init and configure (slave is needed)
+ ::tcl::OptKeyRegister {
+ {slave -name {} "name of the slave"}
+ } ::safe::interpIC
- set okpat "^(name.*|convert.*)\$"
- set subcommand [lindex $args 0]
+ # adding the flags sub programs to the command program (relying on Opt's
+ # internal implementation details)
+ lappend ::tcl::OptDesc(::safe::interpIC) $::tcl::OptDesc($temp)
- if {[regexp $okpat $subcommand]} {
- return [::interp invokehidden $slave encoding {*}$args]
- }
+ # temp not needed anymore
+ ::tcl::OptKeyDelete $temp
- if {[string first $subcommand system] == 0} {
- if {$argc == 1} {
- # passed all the tests , lets source it:
- if {[catch {::interp invokehidden \
- $slave encoding system} msg]} {
- Log $slave $msg
- return -code error "script error"
- }
- } else {
- set msg "wrong # args: should be \"encoding system\""
- Log $slave $msg
- error $msg
- }
- } else {
- set msg "wrong # args: should be \"encoding option ?arg ...?\""
- Log $slave $msg
- error $msg
- }
+ ####
+ #
+ # Default: No logging.
+ #
+ ####
- return $msg
- }
+ setLogCmd {}
+ # Log eventually.
+ # To enable error logging, set Log to {puts stderr} for instance,
+ # via setLogCmd.
+ return
}
+
+namespace eval ::safe {
+ # internal variables
+
+ # Log command, set via 'setLogCmd'. Logging is disabled when empty.
+ variable Log {}
+
+ # The package maintains a state array per slave interp under its
+ # control. The name of this array is S<interp-name>. This array is
+ # brought into scope where needed, using 'namespace upvar'. The S
+ # prefix is used to avoid that a slave interp called "Log" smashes
+ # the "Log" variable.
+ #
+ # The array's elements are:
+ #
+ # access_path : List of paths accessible to the slave.
+ # access_path,norm : Ditto, in normalized form.
+ # access_path,slave : Ditto, as the path tokens as seen by the slave.
+ # access_path,map : dict ( token -> path )
+ # access_path,remap : dict ( path -> token )
+ # tm_path_slave : List of TM root directories, as tokens seen by the slave.
+ # staticsok : Value of option -statics
+ # nestedok : Value of option -nested
+ # cleanupHook : Value of option -deleteHook
+}
+
+::safe::Setup