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CentOS 7.0 - man page for tk_safeinit (centos section 3)

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Tk_Init(3)			      Tk Library Procedures			       Tk_Init(3)


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

       #include <tk.h>



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

       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 docu-
       mented for the wish application (in fact, wish uses Tk_Init to  process	its  command-line

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

       bell   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   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.

	      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

	      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.

       safe, application, initialization, load, main window

Tk					       8.0				       Tk_Init(3)
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