125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* James W. Williams of NASA Goddard Space Flight Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1991, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)cksum.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include "extern.h"
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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extern int optind;
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u_long len, val;
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register int ch, fd, rval;
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char *fn;
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int (*cfncn) __P((int, unsigned long *, unsigned long *));
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void (*pfncn) __P((char *, unsigned long, unsigned long));
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cfncn = crc;
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pfncn = pcrc;
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while ((ch = getopt(argc, argv, "o:")) != -1)
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switch(ch) {
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case 'o':
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if (*optarg == '1') {
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cfncn = csum1;
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pfncn = psum1;
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} else if (*optarg == '2') {
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cfncn = csum2;
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pfncn = psum2;
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} else {
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(void)fprintf(stderr,
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"cksum: illegal argument to -o option\n");
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usage();
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}
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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fd = STDIN_FILENO;
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fn = NULL;
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rval = 0;
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do {
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if (*argv) {
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fn = *argv++;
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if ((fd = open(fn, O_RDONLY, 0)) < 0) {
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(void)fprintf(stderr, "cksum: %s: %s\n",
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fn, strerror(errno));
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rval = 1;
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continue;
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}
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}
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if (cfncn(fd, &val, &len)) {
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(void)fprintf(stderr, "cksum: %s: %s\n",
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fn ? fn : "stdin", strerror(errno));
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rval = 1;
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} else
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pfncn(fn, val, len);
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(void)close(fd);
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} while (*argv);
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exit(rval);
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}
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void
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usage()
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{
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(void)fprintf(stderr, "usage: cksum [-o 1 | 2] [file ...]\n");
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exit(1);
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}
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