80 lines
3.1 KiB
C
80 lines
3.1 KiB
C
/*----------------------------------------------------------------------*/
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/* magicexec.c */
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/* */
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/* Written by R. Timothy Edwards for MultiGiG, Inc., July 2004 */
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/* This file mainly lifted from the main application routine for */
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/* "wish" from the Tk distribution. */
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/* */
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/* This is a compact re-write of the "wish" executable that calls */
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/* Tk_MainEx with application-specific processing. Specifically, */
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/* "wish" doesn't allow the startup script (~/.wishrc) to be renamed. */
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/* However, for magic running as an extension of Tcl, we want to source */
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/* the magic.tcl file instead of ~/.wishrc. So, all this file really */
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/* does is to set the Tcl variable "tcl_rcFileName" to magic.tcl, so */
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/* that it will be processed as the startup script, followed by a drop */
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/* back to the Tcl interpreter command-line main loop. */
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/* */
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/* This is a standalone executable. However, it is only called when */
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/* "-noconsole" is specified on the UNIX command-line. When the */
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/* console is used, the console is capable of sourcing the magic.tcl */
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/* script itself, and so it uses "wish" as the executable. However, */
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/* the console redirects standard input, so it prevents magic from */
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/* being used in a batch processing mode. Thus, to batch-process with */
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/* magic, use "magic -noc -d NULL < script.tcl" or, interactively, */
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/* "magic -noc -d NULL << EOF" followed by commands entered from stdin */
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/* and ending with "EOF". */
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/* */
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/* The "magicexec" method replaces the former use of "wish" with the */
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/* "magic" script setting HOME to point to the directory containing */
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/* ".wishrc", a symbolic link to "magic.tcl". That failed to work on */
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/* remote systems because the $HOME environment variable is also used */
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/* to find the user's .Xauthority file to authenticate the X11 */
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/* connection. */
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/*----------------------------------------------------------------------*/
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#include <stdio.h>
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#include <tk.h>
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#include <tcl.h>
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/*----------------------------------------------------------------------*/
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/* Application initiation. This is exactly like the AppInit routine */
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/* for "wish", minus the cruft, but with "tcl_rcFileName" set to */
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/* "magic.tcl" instead of "~/.wishrc". */
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/*----------------------------------------------------------------------*/
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int
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magic_AppInit(interp)
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Tcl_Interp *interp;
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{
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if (Tcl_Init(interp) == TCL_ERROR) {
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return TCL_ERROR;
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}
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if (Tk_Init(interp) == TCL_ERROR) {
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return TCL_ERROR;
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}
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Tcl_StaticPackage(interp, "Tk", Tk_Init, Tk_SafeInit);
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/* This is where we replace the home ".wishrc" file with */
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/* magic's startup script. */
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Tcl_SetVar(interp, "tcl_rcFileName", TCL_DIR "/magic.tcl", TCL_GLOBAL_ONLY);
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return TCL_OK;
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}
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/*----------------------------------------------------------------------*/
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/* The main procedure; replacement for "wish". */
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/*----------------------------------------------------------------------*/
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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Tk_Main(argc, argv, magic_AppInit);
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return 0;
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}
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/*----------------------------------------------------------------------*/
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