2 * Copyright (c) 1987, 1990, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * $FreeBSD: src/usr.bin/cmp/cmp.c,v 1.6.6.4 2001/11/21 10:47:54 dwmalone Exp $
34 * $DragonFly: src/usr.bin/cmp/cmp.c,v 1.2 2003/06/17 04:29:25 dillon Exp $
36 * @(#) Copyright (c) 1987, 1990, 1993, 1994 The Regents of the University of California. All rights reserved.
37 * @(#)cmp.c 8.3 (Berkeley) 4/2/94
40 #include <sys/types.h>
52 int lflag, sflag, xflag, zflag;
54 static void usage __P((void));
63 int ch, fd1, fd2, special;
64 const char *file1, *file2;
66 while ((ch = getopt(argc, argv, "-lsxz")) != -1)
68 case 'l': /* print all differences */
71 case 's': /* silent run */
75 case 'x': /* hex output */
79 case 'z': /* compare size first */
82 case '-': /* stdin (must be after options) */
94 errx(ERR_EXIT, "specifying -s with -l or -x is not permitted");
96 if (argc < 2 || argc > 4)
99 /* Backward compatibility -- handle "-" meaning stdin. */
101 if (strcmp(file1 = argv[0], "-") == 0) {
106 else if ((fd1 = open(file1, O_RDONLY, 0)) < 0) {
108 err(ERR_EXIT, "%s", file1);
112 if (strcmp(file2 = argv[1], "-") == 0) {
115 "standard input may only be specified once");
120 else if ((fd2 = open(file2, O_RDONLY, 0)) < 0) {
122 err(ERR_EXIT, "%s", file2);
127 skip1 = argc > 2 ? strtol(argv[2], NULL, 0) : 0;
128 skip2 = argc == 4 ? strtol(argv[3], NULL, 0) : 0;
131 if (fstat(fd1, &sb1)) {
133 err(ERR_EXIT, "%s", file1);
137 if (!S_ISREG(sb1.st_mode))
140 if (fstat(fd2, &sb2)) {
142 err(ERR_EXIT, "%s", file2);
146 if (!S_ISREG(sb2.st_mode))
152 c_special(fd1, file1, skip1, fd2, file2, skip2);
154 if (zflag && sb1.st_size != sb2.st_size) {
156 (void) printf("%s %s differ: size\n",
160 c_regular(fd1, file1, skip1, sb1.st_size,
161 fd2, file2, skip2, sb2.st_size);
170 (void)fprintf(stderr,
171 "usage: cmp [-l | -s | -x] [-z] file1 file2 [skip1 [skip2]]\n");