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 #include <sys/types.h>
36
37 #include <err.h>
38 #include <fcntl.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43
44 #include "extern.h"
45
46 static void usage(void) __dead2;
47
48 int
main(int argc,char ** argv)49 main(int argc, char **argv)
50 {
51 uint32_t val;
52 int ch, fd, rval;
53 off_t len;
54 char *fn, *p;
55 int (*cfncn)(int, uint32_t *, off_t *);
56 void (*pfncn)(char *, uint32_t, off_t);
57
58 if ((p = strrchr(argv[0], '/')) == NULL)
59 p = argv[0];
60 else
61 ++p;
62 if (!strcmp(p, "sum")) {
63 cfncn = csum1;
64 pfncn = psum1;
65 ++argv;
66 } else {
67 cfncn = crc;
68 pfncn = pcrc;
69
70 while ((ch = getopt(argc, argv, "o:")) != -1)
71 switch (ch) {
72 case 'o':
73 if (!strcmp(optarg, "1")) {
74 cfncn = csum1;
75 pfncn = psum1;
76 } else if (!strcmp(optarg, "2")) {
77 cfncn = csum2;
78 pfncn = psum2;
79 } else if (!strcmp(optarg, "3")) {
80 cfncn = crc32;
81 pfncn = pcrc;
82 } else {
83 warnx("illegal argument to -o option");
84 usage();
85 }
86 break;
87 case '?':
88 default:
89 usage();
90 }
91 argc -= optind;
92 argv += optind;
93 }
94
95 fd = STDIN_FILENO;
96 fn = NULL;
97 rval = 0;
98 do {
99 if (*argv) {
100 fn = *argv++;
101 if ((fd = open(fn, O_RDONLY, 0)) < 0) {
102 warn("%s", fn);
103 rval = 1;
104 continue;
105 }
106 }
107 if (cfncn(fd, &val, &len)) {
108 warn("%s", fn ? fn : "stdin");
109 rval = 1;
110 } else
111 pfncn(fn, val, len);
112 (void)close(fd);
113 } while (*argv);
114 exit(rval);
115 }
116
117 static void
usage(void)118 usage(void)
119 {
120 (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n");
121 (void)fprintf(stderr, " sum [file ...]\n");
122 exit(1);
123 }
124