2 * Copyright (c) 2005 Brian Somers <brian@FreeBSD.org>
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: head/usr.bin/cmp/link.c 149388 2005-08-23 13:13:13Z brian $
29 #include <sys/types.h>
39 c_link(const char *file1, off_t skip1, const char *file2, off_t skip2)
41 char buf1[PATH_MAX], *p1;
42 char buf2[PATH_MAX], *p2;
43 int dfound, len1, len2;
47 if ((len1 = readlink(file1, buf1, sizeof(buf1) - 1)) < 0) {
49 err(ERR_EXIT, "%s", file1);
54 if ((len2 = readlink(file2, buf2, sizeof(buf2) - 1)) < 0) {
56 err(ERR_EXIT, "%s", file2);
71 for (p1 = buf1 + skip1, p2 = buf2 + skip2; *p1 && *p2; p1++, p2++) {
72 if ((ch = *p1) != *p2) {
75 (void)printf("%08llx %02x %02x\n",
76 (long long)byte - 1, ch, *p2);
79 (void)printf("%6lld %3o %3o\n",
80 (long long)byte, ch, *p2);
82 diffmsg(file1, file2, byte, 1);
89 eofmsg (*p1 ? file2 : file1);