Tk_SafeInit

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
       interp->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 com-
       mands 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  con-
              tents of the clipboard are pasted.

       grab   Grab can be used to block the user from using any other applica-
              tions.

       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 com-
              mands.

       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 decora-
              tions, move windows around, etc.


KEYWORDS
       safe, application, initialization, load, main window



Tk                                    8.0                           Tk_Init(3)