| 1 | /* $NetBSD: cmp.c,v 1.15 2006/01/19 20:44:57 garbled Exp $ */
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| 2 |
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| 3 | /*
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| 4 | * Copyright (c) 1987, 1990, 1993, 1994
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without
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| 8 | * modification, are permitted provided that the following conditions
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| 9 | * are met:
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * 3. Neither the name of the University nor the names of its contributors
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| 16 | * may be used to endorse or promote products derived from this software
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| 17 | * without specific prior written permission.
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| 18 | *
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 29 | * SUCH DAMAGE.
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| 30 | */
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| 31 |
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| 32 | /*#include <sys/cdefs.h>*/
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| 33 | #ifndef lint
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| 34 | /*__COPYRIGHT("@(#) Copyright (c) 1987, 1990, 1993, 1994\n\
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| 35 | The Regents of the University of California. All rights reserved.\n");*/
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| 36 | #endif /* not lint */
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| 37 |
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| 38 | #ifndef lint
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| 39 | /*#if 0
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| 40 | static char sccsid[] = "@(#)cmp.c 8.3 (Berkeley) 4/2/94";
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| 41 | #else
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| 42 | __RCSID("$NetBSD: cmp.c,v 1.15 2006/01/19 20:44:57 garbled Exp $");
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| 43 | #endif*/
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| 44 | #endif /* not lint */
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| 45 |
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| 46 | #include <sys/types.h>
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| 47 | #include <sys/stat.h>
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| 48 |
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| 49 | #include "err.h"
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| 50 | #include <errno.h>
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| 51 | #include <fcntl.h>
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| 52 | #include <stdio.h>
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| 53 | #include <stdlib.h>
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| 54 | #include <string.h>
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| 55 | #ifndef _MSC_VER
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| 56 | # include <unistd.h>
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| 57 | #else
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| 58 | # include "mscfakes.h"
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| 59 | # if _MSC_VER >= 1400 /* We want 64-bit file lengths here when possible. */
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| 60 | # define off_t __int64
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| 61 | # define stat _stat64
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| 62 | # define fstat _fstat64
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| 63 | # define lseek _lseeki64
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| 64 | # endif
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| 65 | #endif
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| 66 | #include <locale.h>
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| 67 | #include "getopt.h"
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| 68 |
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| 69 | #ifndef O_BINARY
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| 70 | # define O_BINARY 0
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| 71 | #endif
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| 72 |
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| 73 | /*#include "extern.h"*/
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| 74 |
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| 75 | #include "kmkbuiltin.h"
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| 76 |
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| 77 |
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| 78 | static int lflag, sflag;
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| 79 |
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| 80 | static struct option long_options[] =
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| 81 | {
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| 82 | { "help", no_argument, 0, 261 },
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| 83 | { "version", no_argument, 0, 262 },
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| 84 | { 0, 0, 0, 0 },
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| 85 | };
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| 86 |
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| 87 |
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| 88 | /* this is kind of ugly but its the simplest way to avoid namespace mess. */
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| 89 | #include "cmp_misc.c"
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| 90 | #include "cmp_special.c"
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| 91 | #if defined(__FreeBSD__) || defined(__NetBSD__) /** @todo more mmap capable OSes. */
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| 92 | #include "cmp_regular.c"
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| 93 | #else
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| 94 | #include "cmp_regular_std.c"
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| 95 | #endif
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| 96 |
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| 97 | static int usage(FILE *);
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| 98 |
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| 99 | int
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| 100 | kmk_builtin_cmp(int argc, char *argv[], char **envp)
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| 101 | {
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| 102 | struct stat sb1, sb2;
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| 103 | off_t skip1 = 0, skip2 = 0;
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| 104 | int ch, fd1, fd2, special;
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| 105 | char *file1, *file2;
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| 106 | int rc;
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| 107 |
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| 108 | #ifdef kmk_builtin_cmp
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| 109 | setlocale(LC_ALL, "");
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| 110 | #endif
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| 111 | /* init globals */
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| 112 | lflag = sflag = 0;
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| 113 |
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| 114 | /* reset getopt and set progname. */
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| 115 | g_progname = argv[0];
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| 116 | opterr = 1;
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| 117 | optarg = NULL;
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| 118 | optopt = 0;
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| 119 | optind = 0; /* init */
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| 120 |
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| 121 | while ((ch = getopt_long(argc, argv, "ls", long_options, NULL)) != -1)
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| 122 | switch (ch) {
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| 123 | case 'l': /* print all differences */
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| 124 | lflag = 1;
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| 125 | break;
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| 126 | case 's': /* silent run */
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| 127 | sflag = 1;
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| 128 | break;
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| 129 | case 261:
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| 130 | usage(stdout);
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| 131 | return 0;
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| 132 | case 262:
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| 133 | return kbuild_version(argv[0]);
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| 134 | case '?':
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| 135 | default:
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| 136 | return usage(stderr);
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| 137 | }
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| 138 | argv += optind;
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| 139 | argc -= optind;
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| 140 |
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| 141 | if (lflag && sflag)
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| 142 | return errx(ERR_EXIT, "only one of -l and -s may be specified");
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| 143 |
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| 144 | if (argc < 2 || argc > 4)
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| 145 | return usage(stderr);
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| 146 |
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| 147 | /* Backward compatibility -- handle "-" meaning stdin. */
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| 148 | special = 0;
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| 149 | if (strcmp(file1 = argv[0], "-") == 0) {
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| 150 | special = 1;
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| 151 | fd1 = 0;
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| 152 | file1 = "stdin";
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| 153 | }
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| 154 | else if ((fd1 = open(file1, O_RDONLY | O_BINARY, 0)) < 0) {
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| 155 | if (!sflag)
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| 156 | warn("%s", file1);
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| 157 | return(ERR_EXIT);
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| 158 | }
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| 159 | if (strcmp(file2 = argv[1], "-") == 0) {
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| 160 | if (special)
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| 161 | return errx(ERR_EXIT,
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| 162 | "standard input may only be specified once");
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| 163 | special = 1;
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| 164 | fd2 = 0;
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| 165 | file2 = "stdin";
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| 166 | }
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| 167 | else if ((fd2 = open(file2, O_RDONLY | O_BINARY, 0)) < 0) {
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| 168 | if (!sflag)
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| 169 | warn("%s", file2);
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| 170 | if (fd1 != 0) close(fd1);
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| 171 | return(ERR_EXIT);
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| 172 | }
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| 173 |
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| 174 | if (argc > 2) {
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| 175 | char *ep;
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| 176 |
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| 177 | errno = 0;
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| 178 | skip1 = strtoll(argv[2], &ep, 0);
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| 179 | if (errno || ep == argv[2]) {
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| 180 | rc = usage(stderr);
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| 181 | goto l_exit;
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| 182 | }
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| 183 |
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| 184 | if (argc == 4) {
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| 185 | skip2 = strtoll(argv[3], &ep, 0);
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| 186 | if (errno || ep == argv[3]) {
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| 187 | rc = usage(stderr);
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| 188 | goto l_exit;
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| 189 | }
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| 190 | }
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| 191 | }
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| 192 |
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| 193 | if (!special) {
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| 194 | if (fstat(fd1, &sb1)) {
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| 195 | rc = err(ERR_EXIT, "%s", file1);
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| 196 | goto l_exit;
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| 197 | }
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| 198 | if (!S_ISREG(sb1.st_mode))
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| 199 | special = 1;
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| 200 | else {
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| 201 | if (fstat(fd2, &sb2)) {
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| 202 | rc = err(ERR_EXIT, "%s", file2);
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| 203 | goto l_exit;
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| 204 | }
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| 205 | if (!S_ISREG(sb2.st_mode))
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| 206 | special = 1;
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| 207 | }
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| 208 | }
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| 209 |
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| 210 | if (special)
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| 211 | rc = c_special(fd1, file1, skip1, fd2, file2, skip2);
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| 212 | else
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| 213 | rc = c_regular(fd1, file1, skip1, sb1.st_size,
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| 214 | fd2, file2, skip2, sb2.st_size);
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| 215 | l_exit:
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| 216 | if (fd1 != 0) close(fd1);
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| 217 | if (fd2 != 0) close(fd2);
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| 218 | return rc;
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| 219 | }
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| 220 |
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| 221 | static int
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| 222 | usage(FILE *fp)
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| 223 | {
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| 224 | fprintf(fp, "usage: %s [-l | -s] file1 file2 [skip1 [skip2]]\n"
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| 225 | " or: %s --help\n"
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| 226 | " or: %s --version\n",
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| 227 | g_progname, g_progname, g_progname);
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| 228 | return(ERR_EXIT);
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| 229 | }
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