/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* James W. Williams of NASA Goddard Space Flight Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1991, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)cksum.c 8.2 (Berkeley) 4/28/95";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
#include <sys/types.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "extern.h"
static void usage(void) __dead2;
int
main(int argc, char **argv)
{
uint32_t val;
int ch, fd, rval;
off_t len;
char *fn, *p;
int (*cfncn)(int, uint32_t *, off_t *);
void (*pfncn)(char *, uint32_t, off_t);
if ((p = strrchr(argv[0], '/')) == NULL)
p = argv[0];
else
++p;
if (!strcmp(p, "sum")) {
cfncn = csum1;
pfncn = psum1;
++argv;
} else {
cfncn = crc;
pfncn = pcrc;
while ((ch = getopt(argc, argv, "o:")) != -1)
switch (ch) {
case 'o':
if (!strcmp(optarg, "1")) {
cfncn = csum1;
pfncn = psum1;
} else if (!strcmp(optarg, "2")) {
cfncn = csum2;
pfncn = psum2;
} else if (!strcmp(optarg, "3")) {
cfncn = crc32;
pfncn = pcrc;
} else {
warnx("illegal argument to -o option");
usage();
}
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
}
fd = STDIN_FILENO;
fn = NULL;
rval = 0;
do {
if (*argv) {
fn = *argv++;
if ((fd = open(fn, O_RDONLY, 0)) < 0) {
warn("%s", fn);
rval = 1;
continue;
}
}
if (cfncn(fd, &val, &len)) {
warn("%s", fn ? fn : "stdin");
rval = 1;
} else
pfncn(fn, val, len);
(void)close(fd);
} while (*argv);
exit(rval);
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n");
(void)fprintf(stderr, " sum [file ...]\n");
exit(1);
}
plain