DragonFly On-Line Manual Pages
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)