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#include <sys/cdefs.h>
38#ifndef lint
39__used static const char copyright[] =
40"@(#) Copyright (c) 1991, 1993\n\
41	The Regents of the University of California.  All rights reserved.\n";
42#endif /* not lint */
43
44#ifndef lint
45#if 0
46static char sccsid[] = "@(#)cksum.c	8.2 (Berkeley) 4/28/95";
47#endif
48#endif /* not lint */
49
50#include <sys/cdefs.h>
51__FBSDID("$FreeBSD: src/usr.bin/cksum/cksum.c,v 1.17 2003/03/13 23:32:28 robert Exp $");
52
53#include <sys/types.h>
54
55#include <err.h>
56#include <fcntl.h>
57#include <stdint.h>
58#include <stdio.h>
59#include <stdlib.h>
60#include <string.h>
61#include <unistd.h>
62
63#include "extern.h"
64
65static void usage(void);
66
67int
68main(int argc, char **argv)
69{
70	uint32_t val;
71	int ch, fd, rval;
72	off_t len;
73	char *fn, *p;
74	int (*cfncn)(int, uint32_t *, off_t *);
75	void (*pfncn)(char *, u_int32_t, off_t);
76
77	cfncn=NULL;
78
79	if(*argv) {
80	  if ((p = rindex(argv[0], '/')) == NULL)
81	    p = argv[0];
82	  else
83	    ++p;
84	  if (!strcmp(p, "sum")) {
85	    cfncn = csum1;
86	    pfncn = psum1;
87	    ++argv;
88	  }
89	}
90
91	if(!cfncn) {
92		cfncn = crc;
93		pfncn = pcrc;
94
95		while ((ch = getopt(argc, argv, "o:")) != -1)
96			switch (ch) {
97			case 'o':
98				if (!strcmp(optarg, "1")) {
99					cfncn = csum1;
100					pfncn = psum1;
101				} else if (!strcmp(optarg, "2")) {
102					cfncn = csum2;
103					pfncn = psum2;
104				} else if (!strcmp(optarg, "3")) {
105					cfncn = crc32;
106					pfncn = pcrc;
107				} else {
108					warnx("illegal argument to -o option");
109					usage();
110				}
111				break;
112			case '?':
113			default:
114				usage();
115			}
116//		argc -= optind;
117		argv += optind;
118	}
119
120	fd = STDIN_FILENO;
121	fn = NULL;
122	rval = 0;
123	do {
124		if (*argv) {
125			fn = *argv++;
126			if ((fd = open(fn, O_RDONLY, 0)) < 0) {
127				warn("%s", fn);
128				rval = 1;
129				continue;
130			}
131		}
132		if (cfncn(fd, &val, &len)) {
133			warn("%s", fn ? fn : "stdin");
134			rval = 1;
135		} else
136			pfncn(fn, val, len);
137		(void)close(fd);
138	} while (*argv);
139	exit(rval);
140}
141
142static void
143usage(void)
144{
145	(void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n");
146	(void)fprintf(stderr, "       sum [file ...]\n");
147	exit(1);
148}
149