Safe Tk (n)
Load Tk into a safe interpreter.
SYNOPSIS
::safe::loadTk slave ?-use windowId? ?-display displayName?
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.
DESCRIPTION
The ::safe::loadTk command initializes the required data structures
in the named safe interpreter and then loads Tk into it.
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 (eg: .x.y) instead of its window Id
([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
KEYWORDS
alias, auto-loading, auto_mkindex, load, master interpreter, safe
interpreter, slave interpreter, source
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