usr.bin/crunch/crunchgen/crunched_main.c

   1 /*      $NetBSD: crunched_main.c,v 1.3 2002/07/03 12:45:06 pooka Exp $  */
   2 /*
   3  * Copyright (c) 1994 University of Maryland
   4  * All Rights Reserved.
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and its
   7  * documentation for any purpose is hereby granted without fee, provided that
   8  * the above copyright notice appear in all copies and that both that
   9  * copyright notice and this permission notice appear in supporting
  10  * documentation, and that the name of U.M. not be used in advertising or
  11  * publicity pertaining to distribution of the software without specific,
  12  * written prior permission.  U.M. makes no representations about the
  13  * suitability of this software for any purpose.  It is provided "as is"
  14  * without express or implied warranty.
  15  *
  16  * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
  18  * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  19  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  20  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  21  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  *
  23  * Author: James da Silva, Systems Design and Analysis Group
  24  *                         Computer Science Department
  25  *                         University of Maryland at College Park
  26  */
  27 /*
  28  * crunched_main.c - main program for crunched binaries, it branches to a
  29  *      particular subprogram based on the value of argv[0].  Also included
  30  *      is a little program invoked when the crunched binary is called via
  31  *      its EXECNAME.  This one prints out the list of compiled-in binaries,
  32  *      or calls one of them based on argv[1].   This allows the testing of
  33  *      the crunched binary without creating all the links.
  34  */
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 __RCSID("$NetBSD: crunched_main.c,v 1.3 2002/07/03 12:45:06 pooka Exp $");
  38 #endif
  39
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <stdlib.h>
  43
  44 struct stub {
  45     char *name;
  46     int (*f)();
  47 };
  48
  49 extern struct stub entry_points[];
  50
  51 int main(int argc, char **argv, char **envp)
  52 {
  53     char *slash, *basename;
  54     struct stub *ep;
  55
  56     if(argv[0] == NULL || *argv[0] == '\0')
  57         crunched_usage();
  58
  59     slash = strrchr(argv[0], '/');
  60     basename = slash? slash+1 : argv[0];
  61
  62     for(ep=entry_points; ep->name != NULL; ep++)
  63         if(!strcmp(basename, ep->name)) break;
  64
  65     if(ep->name)
  66         return ep->f(argc, argv, envp);
  67     else {
  68         fprintf(stderr, "%s: %s not compiled in\n", EXECNAME, basename);
  69         crunched_usage();
  70     }
  71 }
  72
  73
  74 int crunched_main(int argc, char **argv, char **envp)
  75 {
  76     struct stub *ep;
  77     int columns, len;
  78
  79     if(argc <= 1)
  80         crunched_usage();
  81
  82     return main(--argc, ++argv, envp);
  83 }
  84
  85
  86 int crunched_usage()
  87 {
  88     int columns, len;
  89     struct stub *ep;
  90
  91     fprintf(stderr, "Usage: %s <prog> <args> ..., where <prog> is one of:\n",
  92             EXECNAME);
  93     columns = 0;
  94     for(ep=entry_points; ep->name != NULL; ep++) {
  95         len = strlen(ep->name) + 1;
  96         if(columns+len < 80)
  97             columns += len;
  98         else {
  99             fprintf(stderr, "\n");
 100             columns = len;
 101         }
 102         fprintf(stderr, " %s", ep->name);
 103     }
 104     fprintf(stderr, "\n");
 105     exit(1);
 106 }
 107
 108 /* end of crunched_main.c */
 109