1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * James W. Williams of NASA Goddard Space Flight Center.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #ifndef lint
36 static const char copyright[] =
37 "@(#) Copyright (c) 1991, 1993\n\
38 The Regents of the University of California. All rights reserved.\n";
39 #endif /* not lint */
40
41 #ifndef lint
42 #if 0
43 static char sccsid[] = "@(#)cksum.c 8.2 (Berkeley) 4/28/95";
44 #endif
45 #endif /* not lint */
46
47 #include <sys/cdefs.h>
48 __FBSDID("$FreeBSD$");
49
50 #include <sys/types.h>
51
52 #include <err.h>
53 #include <fcntl.h>
54 #include <stdio.h>
55 #include <stdlib.h>
56 #include <string.h>
57 #include <unistd.h>
58
59 #include "extern.h"
60
61 static void usage(void);
62
63 int
main(int argc,char ** argv)64 main(int argc, char **argv)
65 {
66 uint32_t val;
67 int ch, fd, rval;
68 off_t len;
69 char *fn, *p;
70 int (*cfncn)(int, uint32_t *, off_t *);
71 void (*pfncn)(char *, uint32_t, off_t);
72
73 if ((p = strrchr(argv[0], '/')) == NULL)
74 p = argv[0];
75 else
76 ++p;
77 if (!strcmp(p, "sum")) {
78 cfncn = csum1;
79 pfncn = psum1;
80 ++argv;
81 } else {
82 cfncn = crc;
83 pfncn = pcrc;
84
85 while ((ch = getopt(argc, argv, "o:")) != -1)
86 switch (ch) {
87 case 'o':
88 if (!strcmp(optarg, "1")) {
89 cfncn = csum1;
90 pfncn = psum1;
91 } else if (!strcmp(optarg, "2")) {
92 cfncn = csum2;
93 pfncn = psum2;
94 } else if (!strcmp(optarg, "3")) {
95 cfncn = crc32;
96 pfncn = pcrc;
97 } else {
98 warnx("illegal argument to -o option");
99 usage();
100 }
101 break;
102 case '?':
103 default:
104 usage();
105 }
106 argc -= optind;
107 argv += optind;
108 }
109
110 fd = STDIN_FILENO;
111 fn = NULL;
112 rval = 0;
113 do {
114 if (*argv) {
115 fn = *argv++;
116 if ((fd = open(fn, O_RDONLY, 0)) < 0) {
117 warn("%s", fn);
118 rval = 1;
119 continue;
120 }
121 }
122 if (cfncn(fd, &val, &len)) {
123 warn("%s", fn ? fn : "stdin");
124 rval = 1;
125 } else
126 pfncn(fn, val, len);
127 (void)close(fd);
128 } while (*argv);
129 exit(rval);
130 }
131
132 static void
usage(void)133 usage(void)
134 {
135 (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n");
136 (void)fprintf(stderr, " sum [file ...]\n");
137 exit(1);
138 }
139