NAME¶
safe::loadTk - Load Tk into a safe interpreter.
SYNOPSIS¶
safe::loadTk slave ?
-use windowId? ?
-display
displayName?
DESCRIPTION¶
Safe Tk is based on Safe Tcl, which provides a mechanism that allows restricted
and mediated access to auto-loading and packages for safe interpreters. Safe
Tk adds the ability to configure the interpreter for safe Tk operations and
load Tk into safe interpreters.
The
safe::loadTk command initializes the required data structures in the
named safe interpreter and then loads Tk into it. The interpreter must have
been created with
safe::interpCreate or have been initialized with
safe::interpInit. The command returns the name of the safe interpreter.
If
-use is specified, the window identified by the specified system
dependent identifier
windowId is used to contain the “.”
window of the safe interpreter; it can be any valid id, eventually referencing
a window belonging to another application. As a convenience, if the window you
plan to use is a Tk Window of the application you can use the window name
(e.g., “
.x.y”) instead of its window Id (e.g., from
winfo id .x.y). When
-use is not specified, a new
toplevel window is created for the “.” window of the safe
interpreter. On X11 if you want the embedded window to use another display
than the default one, specify it with
-display. See the
SECURITY
ISSUES section below for implementation details.
SECURITY ISSUES¶
Please read the
safe manual page for Tcl to learn about the basic
security considerations for Safe Tcl.
safe::loadTk adds the value of
tk_library taken from the master
interpreter to the virtual access path of the safe interpreter so that
auto-loading will work in the safe interpreter.
Tk initialization is now safe with respect to not trusting the slave's state for
startup.
safe::loadTk registers the slave's name so when the Tk
initialization (
Tk_SafeInit) is called and in turn calls the master's
safe::InitTk it will return the desired
argv equivalent (
-use windowId, correct
-display, etc.)
When
-use is not used, the new toplevel created is specially decorated so
the user is always aware that the user interface presented comes from a
potentially unsafe code and can easily delete the corresponding interpreter.
On X11, conflicting
-use and
-display are likely to generate a
fatal X error.
SEE ALSO¶
safe(3tcl), interp(3tcl), library(3tcl), load(3tcl), package(3tcl),
source(3tcl), unknown(3tcl)
KEYWORDS¶
alias, auto-loading, auto_mkindex, load, master interpreter, safe interpreter,
slave interpreter, source