freebsd-dev/usr.sbin/crunch/crunchgen/crunched_main.c
Jordan K. Hubbard de5663609e This is the new crunch utility for making distribution floppies from
James da Silva.  We need to integrate this before 1.1.5 so that we can
actually make the boot floppies.
1994-06-15 10:33:49 +00:00

103 lines
2.9 KiB
C

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