cksum.c revision 87212 
1/*-
2 * Copyright (c) 1991, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * James W. Williams of NASA Goddard Space Flight Center.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static const char copyright[] =
39"@(#) Copyright (c) 1991, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)cksum.c	8.2 (Berkeley) 4/28/95";
46#endif
47static const char rcsid[] =
48  "$FreeBSD: head/usr.bin/cksum/cksum.c 87212 2001-12-02 12:54:40Z markm $";
49#endif /* not lint */
50
51#include <sys/types.h>
52
53#include <err.h>
54#include <fcntl.h>
55#include <stdio.h>
56#include <stdlib.h>
57#include <string.h>
58#include <unistd.h>
59
60#include "extern.h"
61
62static void usage __P((void));
63
64int
65main(argc, argv)
66	int argc;
67	char **argv;
68{
69	int ch, fd, rval;
70	u_int32_t len, val;
71	char *fn, *p;
72	int (*cfncn) __P((int, u_int32_t *, u_int32_t *));
73	void (*pfncn) __P((char *, u_int32_t, u_int32_t));
74
75	if ((p = rindex(argv[0], '/')) == NULL)
76		p = argv[0];
77	else
78		++p;
79	if (!strcmp(p, "sum")) {
80		cfncn = csum1;
81		pfncn = psum1;
82		++argv;
83	} else {
84		cfncn = crc;
85		pfncn = pcrc;
86
87		while ((ch = getopt(argc, argv, "o:")) != -1)
88			switch (ch) {
89			case 'o':
90				if (!strcmp(optarg, "1")) {
91					cfncn = csum1;
92					pfncn = psum1;
93				} else if (!strcmp(optarg, "2")) {
94					cfncn = csum2;
95					pfncn = psum2;
96				} else if (!strcmp(optarg, "3")) {
97					cfncn = crc32;
98					pfncn = pcrc;
99				} else {
100					warnx("illegal argument to -o option");
101					usage();
102				}
103				break;
104			case '?':
105			default:
106				usage();
107			}
108		argc -= optind;
109		argv += optind;
110	}
111
112	fd = STDIN_FILENO;
113	fn = NULL;
114	rval = 0;
115	do {
116		if (*argv) {
117			fn = *argv++;
118			if ((fd = open(fn, O_RDONLY, 0)) < 0) {
119				warn("%s", fn);
120				rval = 1;
121				continue;
122			}
123		}
124		if (cfncn(fd, &val, &len)) {
125			warn("%s", fn ? fn : "stdin");
126			rval = 1;
127		} else
128			pfncn(fn, val, len);
129		(void)close(fd);
130	} while (*argv);
131	exit(rval);
132}
133
134static void
135usage()
136{
137	(void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n");
138	(void)fprintf(stderr, "       sum [file ...]\n");
139	exit(1);
140}
141