1e1bfde1bSBrian Somers /*- 2e1bfde1bSBrian Somers * Copyright (c) 2005 Brian Somers <brian@FreeBSD.org> 3e1bfde1bSBrian Somers * All rights reserved. 4e1bfde1bSBrian Somers * 5e1bfde1bSBrian Somers * Redistribution and use in source and binary forms, with or without 6e1bfde1bSBrian Somers * modification, are permitted provided that the following conditions 7e1bfde1bSBrian Somers * are met: 8e1bfde1bSBrian Somers * 1. Redistributions of source code must retain the above copyright 9e1bfde1bSBrian Somers * notice, this list of conditions and the following disclaimer. 10e1bfde1bSBrian Somers * 2. Redistributions in binary form must reproduce the above copyright 11e1bfde1bSBrian Somers * notice, this list of conditions and the following disclaimer in the 12e1bfde1bSBrian Somers * documentation and/or other materials provided with the distribution. 13e1bfde1bSBrian Somers * 14e1bfde1bSBrian Somers * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15e1bfde1bSBrian Somers * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16e1bfde1bSBrian Somers * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17e1bfde1bSBrian Somers * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18e1bfde1bSBrian Somers * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19e1bfde1bSBrian Somers * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20e1bfde1bSBrian Somers * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21e1bfde1bSBrian Somers * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22e1bfde1bSBrian Somers * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23e1bfde1bSBrian Somers * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24e1bfde1bSBrian Somers * SUCH DAMAGE. 25e1bfde1bSBrian Somers */ 26e1bfde1bSBrian Somers 27e1bfde1bSBrian Somers #include <sys/cdefs.h> 28e1bfde1bSBrian Somers __FBSDID("$FreeBSD$"); 29e1bfde1bSBrian Somers 30e1bfde1bSBrian Somers #include <sys/types.h> 31e1bfde1bSBrian Somers #include <err.h> 32e1bfde1bSBrian Somers #include <limits.h> 33e1bfde1bSBrian Somers #include <stdio.h> 34e1bfde1bSBrian Somers #include <stdlib.h> 35e1bfde1bSBrian Somers #include <unistd.h> 36e1bfde1bSBrian Somers 37e1bfde1bSBrian Somers #include "extern.h" 38e1bfde1bSBrian Somers 39e1bfde1bSBrian Somers void 40e1bfde1bSBrian Somers c_link(const char *file1, off_t skip1, const char *file2, off_t skip2) 41e1bfde1bSBrian Somers { 42e1bfde1bSBrian Somers char buf1[PATH_MAX], *p1; 43e1bfde1bSBrian Somers char buf2[PATH_MAX], *p2; 44e1bfde1bSBrian Somers int dfound, len1, len2; 45e1bfde1bSBrian Somers off_t byte; 46e1bfde1bSBrian Somers u_char ch; 47e1bfde1bSBrian Somers 48e1bfde1bSBrian Somers if ((len1 = readlink(file1, buf1, sizeof(buf1) - 1)) < 0) { 49e1bfde1bSBrian Somers if (!sflag) 50e1bfde1bSBrian Somers err(ERR_EXIT, "%s", file1); 51e1bfde1bSBrian Somers else 52e1bfde1bSBrian Somers exit(ERR_EXIT); 53e1bfde1bSBrian Somers } 54e1bfde1bSBrian Somers 55e1bfde1bSBrian Somers if ((len2 = readlink(file2, buf2, sizeof(buf2) - 1)) < 0) { 56e1bfde1bSBrian Somers if (!sflag) 57e1bfde1bSBrian Somers err(ERR_EXIT, "%s", file2); 58e1bfde1bSBrian Somers else 59e1bfde1bSBrian Somers exit(ERR_EXIT); 60e1bfde1bSBrian Somers } 61e1bfde1bSBrian Somers 62e1bfde1bSBrian Somers if (skip1 > len1) 63e1bfde1bSBrian Somers skip1 = len1; 64e1bfde1bSBrian Somers buf1[len1] = '\0'; 65e1bfde1bSBrian Somers 66e1bfde1bSBrian Somers if (skip2 > len2) 67e1bfde1bSBrian Somers skip2 = len2; 68e1bfde1bSBrian Somers buf2[len2] = '\0'; 69e1bfde1bSBrian Somers 70e1bfde1bSBrian Somers dfound = 0; 71e1bfde1bSBrian Somers byte = 1; 72e1bfde1bSBrian Somers for (p1 = buf1 + skip1, p2 = buf2 + skip2; *p1 && *p2; p1++, p2++) { 73e1bfde1bSBrian Somers if ((ch = *p1) != *p2) { 74e1bfde1bSBrian Somers if (xflag) { 75e1bfde1bSBrian Somers dfound = 1; 76e1bfde1bSBrian Somers (void)printf("%08llx %02x %02x\n", 77e1bfde1bSBrian Somers (long long)byte - 1, ch, *p2); 78e1bfde1bSBrian Somers } else if (lflag) { 79e1bfde1bSBrian Somers dfound = 1; 80e1bfde1bSBrian Somers (void)printf("%6lld %3o %3o\n", 81e1bfde1bSBrian Somers (long long)byte, ch, *p2); 82e1bfde1bSBrian Somers } else 83e1bfde1bSBrian Somers diffmsg(file1, file2, byte, 1); 84e1bfde1bSBrian Somers /* NOTREACHED */ 85e1bfde1bSBrian Somers } 86e1bfde1bSBrian Somers byte++; 87e1bfde1bSBrian Somers } 88e1bfde1bSBrian Somers 89e1bfde1bSBrian Somers if (*p1 || *p2) 90e1bfde1bSBrian Somers eofmsg (*p1 ? file2 : file1); 91e1bfde1bSBrian Somers if (dfound) 92e1bfde1bSBrian Somers exit(DIFF_EXIT); 93e1bfde1bSBrian Somers } 94