Tk_Init(3) Tk Library Procedures Tk_Init(3)

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NAME

Tk_Init, Tk_SafeInit - add Tk to an interpreter and make a new Tk
application.

SYNOPSIS

#include <tk.h>

int
Tk_Init(interp)

int
Tk_SafeInit(interp)

ARGUMENTS

Tcl_Interp *interp (in) Interpreter in which to
load Tk. Tk should not
already be loaded in this
interpreter.
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DESCRIPTION

Tk_Init is the package initialization procedure for Tk. It is
normally invoked by the Tcl_AppInit procedure for an application or
by the load command. Tk_Init adds all of Tk's commands to interp and
creates a new Tk application, including its main window. If the
initialization is successful Tk_Init returns TCL_OK; if there is an
error it returns TCL_ERROR. Tk_Init also leaves a result or error
message in interpreter interp's result.

If there is a variable argv in interp, Tk_Init treats the contents of
this variable as a list of options for the new Tk application. The
options may have any of the forms documented for the wish application
(in fact, wish uses Tk_Init to process its command-line arguments).

Tk_SafeInit is identical to Tk_Init except that it removes all Tk
commands that are considered unsafe. Those commands and the reasons
for their exclusion are:

bell Continuous ringing of the bell is a nuisance.

clipboard
A malicious script could replace the contents of the clipboard
with the string "rm -r *" and lead to surprises when the
contents of the clipboard are pasted.

grab Grab can be used to block the user from using any other
applications.

menu Menus can be used to cover the entire screen and to steal
input from the user.

selection
See clipboard.

send Send can be used to cause unsafe interpreters to execute
commands.

tk The tk command recreates the send command, which is unsafe.

tkwait Tkwait can block the containing process forever

toplevel
Toplevels can be used to cover the entire screen and to steal
input from the user.

wm If toplevels are ever allowed, wm can be used to remove
decorations, move windows around, etc.

KEYWORDS

safe, application, initialization, load, main window

Tk 8.0 Tk_Init(3)