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  4. Tk_SafeInit(3)

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Tk_Init(3) Tk Library Procedures Tk_Init(3) 





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.
    
    

    

  








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:



  

  
Continuous ringing of the bell is a nuisance.

  

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

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

  

  
See clipboard.

  

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

  

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

  

  
Tkwait can block the containing process forever

  

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

  

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








KEYWORDS


safe, application, initialization, load, main window







  

    8.0
    Tk