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