cmp.c revision 1.1.1.2
1 1.1 cgd /* 2 1.1.1.2 tls * Copyright (c) 1987, 1990, 1993, 1994 3 1.1.1.2 tls * The Regents of the University of California. All rights reserved. 4 1.1 cgd * 5 1.1 cgd * Redistribution and use in source and binary forms, with or without 6 1.1 cgd * modification, are permitted provided that the following conditions 7 1.1 cgd * are met: 8 1.1 cgd * 1. Redistributions of source code must retain the above copyright 9 1.1 cgd * notice, this list of conditions and the following disclaimer. 10 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 11 1.1 cgd * notice, this list of conditions and the following disclaimer in the 12 1.1 cgd * documentation and/or other materials provided with the distribution. 13 1.1 cgd * 3. All advertising materials mentioning features or use of this software 14 1.1 cgd * must display the following acknowledgement: 15 1.1 cgd * This product includes software developed by the University of 16 1.1 cgd * California, Berkeley and its contributors. 17 1.1 cgd * 4. Neither the name of the University nor the names of its contributors 18 1.1 cgd * may be used to endorse or promote products derived from this software 19 1.1 cgd * without specific prior written permission. 20 1.1 cgd * 21 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 1.1 cgd * SUCH DAMAGE. 32 1.1 cgd */ 33 1.1 cgd 34 1.1 cgd #ifndef lint 35 1.1.1.2 tls static char copyright[] = 36 1.1.1.2 tls "@(#) Copyright (c) 1987, 1990, 1993, 1994\n\ 37 1.1.1.2 tls The Regents of the University of California. All rights reserved.\n"; 38 1.1 cgd #endif /* not lint */ 39 1.1 cgd 40 1.1 cgd #ifndef lint 41 1.1.1.2 tls static char sccsid[] = "@(#)cmp.c 8.3 (Berkeley) 4/2/94"; 42 1.1 cgd #endif /* not lint */ 43 1.1 cgd 44 1.1.1.2 tls #include <sys/types.h> 45 1.1 cgd #include <sys/stat.h> 46 1.1.1.2 tls 47 1.1.1.2 tls #include <err.h> 48 1.1.1.2 tls #include <fcntl.h> 49 1.1 cgd #include <stdio.h> 50 1.1.1.2 tls #include <stdlib.h> 51 1.1.1.2 tls #include <string.h> 52 1.1.1.2 tls #include <unistd.h> 53 1.1.1.2 tls 54 1.1.1.2 tls #include "extern.h" 55 1.1.1.2 tls 56 1.1.1.2 tls int lflag, sflag; 57 1.1 cgd 58 1.1.1.2 tls static void usage __P((void)); 59 1.1 cgd 60 1.1.1.2 tls int 61 1.1 cgd main(argc, argv) 62 1.1 cgd int argc; 63 1.1 cgd char *argv[]; 64 1.1 cgd { 65 1.1.1.2 tls struct stat sb1, sb2; 66 1.1.1.2 tls off_t skip1, skip2; 67 1.1.1.2 tls int ch, fd1, fd2, special; 68 1.1.1.2 tls char *file1, *file2; 69 1.1 cgd 70 1.1 cgd while ((ch = getopt(argc, argv, "-ls")) != EOF) 71 1.1 cgd switch (ch) { 72 1.1 cgd case 'l': /* print all differences */ 73 1.1.1.2 tls lflag = 1; 74 1.1 cgd break; 75 1.1 cgd case 's': /* silent run */ 76 1.1.1.2 tls sflag = 1; 77 1.1 cgd break; 78 1.1.1.2 tls case '-': /* stdin (must be after options) */ 79 1.1 cgd --optind; 80 1.1 cgd goto endargs; 81 1.1 cgd case '?': 82 1.1 cgd default: 83 1.1 cgd usage(); 84 1.1 cgd } 85 1.1 cgd endargs: 86 1.1 cgd argv += optind; 87 1.1 cgd argc -= optind; 88 1.1 cgd 89 1.1.1.2 tls if (lflag && sflag) 90 1.1.1.2 tls errx(ERR_EXIT, "only one of -l and -s may be specified"); 91 1.1.1.2 tls 92 1.1 cgd if (argc < 2 || argc > 4) 93 1.1 cgd usage(); 94 1.1 cgd 95 1.1.1.2 tls /* Backward compatibility -- handle "-" meaning stdin. */ 96 1.1.1.2 tls special = 0; 97 1.1.1.2 tls if (strcmp(file1 = argv[0], "-") == 0) { 98 1.1.1.2 tls special = 1; 99 1.1 cgd fd1 = 0; 100 1.1.1.2 tls file1 = "stdin"; 101 1.1.1.2 tls } 102 1.1 cgd else if ((fd1 = open(file1, O_RDONLY, 0)) < 0) 103 1.1.1.2 tls err(ERR_EXIT, "%s", file1); 104 1.1.1.2 tls if (strcmp(file2 = argv[1], "-") == 0) { 105 1.1.1.2 tls if (special) 106 1.1.1.2 tls errx(ERR_EXIT, 107 1.1.1.2 tls "standard input may only be specified once"); 108 1.1.1.2 tls special = 1; 109 1.1 cgd fd2 = 0; 110 1.1.1.2 tls file2 = "stdin"; 111 1.1 cgd } 112 1.1.1.2 tls else if ((fd2 = open(file2, O_RDONLY, 0)) < 0) 113 1.1.1.2 tls err(ERR_EXIT, "%s", file2); 114 1.1 cgd 115 1.1.1.2 tls skip1 = argc > 2 ? strtol(argv[2], NULL, 10) : 0; 116 1.1.1.2 tls skip2 = argc == 4 ? strtol(argv[3], NULL, 10) : 0; 117 1.1 cgd 118 1.1.1.2 tls if (!special) { 119 1.1.1.2 tls if (fstat(fd1, &sb1)) 120 1.1.1.2 tls err(ERR_EXIT, "%s", file1); 121 1.1.1.2 tls if (!S_ISREG(sb1.st_mode)) 122 1.1.1.2 tls special = 1; 123 1.1.1.2 tls else { 124 1.1.1.2 tls if (fstat(fd2, &sb2)) 125 1.1.1.2 tls err(ERR_EXIT, "%s", file2); 126 1.1.1.2 tls if (!S_ISREG(sb2.st_mode)) 127 1.1.1.2 tls special = 1; 128 1.1 cgd } 129 1.1 cgd } 130 1.1 cgd 131 1.1.1.2 tls if (special) 132 1.1.1.2 tls c_special(fd1, file1, skip1, fd2, file2, skip2); 133 1.1.1.2 tls else 134 1.1.1.2 tls c_regular(fd1, file1, skip1, sb1.st_size, 135 1.1.1.2 tls fd2, file2, skip2, sb2.st_size); 136 1.1.1.2 tls exit(0); 137 1.1 cgd } 138 1.1 cgd 139 1.1.1.2 tls static void 140 1.1 cgd usage() 141 1.1 cgd { 142 1.1.1.2 tls 143 1.1.1.2 tls (void)fprintf(stderr, 144 1.1.1.2 tls "usage: cmp [-l | s] file1 file2 [skip1 [skip2]]\n"); 145 1.1.1.2 tls exit(ERR_EXIT); 146 1.1 cgd } 147
Indexes created Tue Sep 30 20:09:53 GMT 2025