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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 applica- tion. 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 in- voked by the Tcl_AppInit procedure for an application or by the load com- mand. Tk_Init adds all of Tk's commands to interp and creates a new Tk ap- plication, 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 re- sult. 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 ex- clusion 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 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 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)
NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | KEYWORDS
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