103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/*
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* Copyright (c) 1994 University of Maryland
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* All Rights Reserved.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of U.M. not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. U.M. makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
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* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: James da Silva, Systems Design and Analysis Group
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* Computer Science Department
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* University of Maryland at College Park
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*/
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/*
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* crunched_main.c - main program for crunched binaries, it branches to a
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* particular subprogram based on the value of argv[0]. Also included
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* is a little program invoked when the crunched binary is called via
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* its EXECNAME. This one prints out the list of compiled-in binaries,
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* or calls one of them based on argv[1]. This allows the testing of
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* the crunched binary without creating all the links.
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*/
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#include <stdio.h>
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#include <string.h>
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struct stub {
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char *name;
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int (*f)();
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};
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extern struct stub entry_points[];
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int main(int argc, char **argv)
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{
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char *slash, *basename;
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struct stub *ep;
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if(argv[0] == NULL || *argv[0] == '\0')
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crunched_usage();
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slash = strrchr(argv[0], '/');
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basename = slash? slash+1 : argv[0];
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for(ep=entry_points; ep->name != NULL; ep++)
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if(!strcmp(basename, ep->name)) break;
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if(ep->name)
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return ep->f(argc, argv);
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else {
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fprintf(stderr, "%s: %s not compiled in\n", EXECNAME, basename);
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crunched_usage();
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}
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}
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int crunched_main(int argc, char **argv)
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{
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struct stub *ep;
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int columns, len;
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if(argc <= 1)
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crunched_usage();
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return main(--argc, ++argv);
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}
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int crunched_usage()
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{
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int columns, len;
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struct stub *ep;
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fprintf(stderr, "Usage: %s <prog> <args> ..., where <prog> is one of:\n",
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EXECNAME);
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columns = 0;
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for(ep=entry_points; ep->name != NULL; ep++) {
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len = strlen(ep->name) + 1;
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if(columns+len < 80)
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columns += len;
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else {
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fprintf(stderr, "\n");
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columns = len;
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}
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fprintf(stderr, " %s", ep->name);
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}
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fprintf(stderr, "\n");
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exit(1);
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}
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/* end of crunched_main.c */
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