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'\"
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'\" Copyright (c) 1995-1996 Sun Microsystems, Inc.
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'\"
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'\" See the file "license.terms" for information on usage and redistribution
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'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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'\"
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'\" RCS: @(#) $Id: loadTk.n,v 1.1.1.1 2002-01-16 10:25:49 markom Exp $
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'\"
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.so man.macros
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.TH "Safe Tk" n 8.0 Tk "Tk Built-In Commands"
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.BS
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'\" Note: do not modify the .SH NAME line immediately below!
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.SH NAME
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loadTk \- Load Tk into a safe interpreter.
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.SH SYNOPSIS
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\fB::safe::loadTk \fIslave\fR ?\fB\-use\fR \fIwindowId\fR? ?\fB\-display\fR \fIdisplayName\fR?
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.BE
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Safe Tk is based on Safe Tcl, which provides a mechanism
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that allows restricted and mediated
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access to auto-loading and packages for safe interpreters.
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Safe Tk adds the ability to configure the interpreter
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for safe Tk operations and load Tk into safe
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interpreters.
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.SH DESCRIPTION
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.PP
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The \fB::safe::loadTk\fR command initializes the required data structures
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in the named safe interpreter and then loads Tk into it.
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The command returns the name of the safe interpreter.
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If \fB\-use\fR is specified, the window identified by the specified system
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dependent identifier \fIwindowId\fR is used to contain the \fB``.''\fR
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window of the safe interpreter; it can be any valid id, eventually
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referencing a window belonging to another application. As a convenience,
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if the window you plan to use is a Tk Window of the application you
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can use the window name (eg: \fB.x.y\fR) instead of its window Id
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(\fB[winfo id .x.y]\fR).
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When \fB\-use\fR is not specified,
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a new toplevel window is created for the \fB``.''\fR window of
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the safe interpreter. On X11 if you want the embedded window
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to use another display than the default one, specify it with
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\fB\-display\fR.
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See the \fBSECURITY ISSUES\fR section below for implementation details.
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.SH SECURITY ISSUES
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.PP
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Please read the \fBsafe\fR manual page for Tcl to learn about the basic
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security considerations for Safe Tcl.
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.PP
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\fB::safe::loadTk\fR adds the value of \fBtk_library\fR taken from the master
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interpreter to the virtual access path of the safe interpreter so that
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auto-loading will work in the safe interpreter.
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.PP
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.PP
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Tk initialization is now safe with respect to not trusting
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the slave's state for startup. \fB::safe::loadTk\fR
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registers the slave's name so
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when the Tk initialization (\fBTk_SafeInit\fR) is called
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and in turn calls the master's \fB::safe::InitTk\fR it will
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return the desired \fBargv\fR equivalent (\fB\-use\fR
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\fIwindowId\fR, correct \fB\-display\fR, etc...).
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.PP
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When \fB\-use\fR is not used, the new toplevel created is specially
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decorated so the user is always aware that the user interface presented comes
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from a potentially unsafe code and can easily delete the corresponding
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interpreter.
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.PP
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On X11, conflicting \fB\-use\fR and \fB\-display\fR are likely
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to generate a fatal X error.
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.SH "SEE ALSO"
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safe(n), interp(n), library(n), load(n), package(n), source(n), unknown(n)
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.SH KEYWORDS
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alias, auto\-loading, auto_mkindex, load, master interpreter, safe
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interpreter, slave interpreter, source
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