1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * James W. Williams of NASA Goddard Space Flight Center. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef lint 36 static const char copyright[] = 37 "@(#) Copyright (c) 1991, 1993\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)cksum.c 8.2 (Berkeley) 4/28/95"; 44 #endif 45 #endif /* not lint */ 46 47 #include <sys/cdefs.h> 48 __FBSDID("$FreeBSD$"); 49 50 #include <sys/types.h> 51 52 #include <err.h> 53 #include <fcntl.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 59 #include "extern.h" 60 61 static void usage(void); 62 63 int 64 main(int argc, char **argv) 65 { 66 uint32_t val; 67 int ch, fd, rval; 68 off_t len; 69 char *fn, *p; 70 int (*cfncn)(int, uint32_t *, off_t *); 71 void (*pfncn)(char *, uint32_t, off_t); 72 73 if ((p = strrchr(argv[0], '/')) == NULL) 74 p = argv[0]; 75 else 76 ++p; 77 if (!strcmp(p, "sum")) { 78 cfncn = csum1; 79 pfncn = psum1; 80 ++argv; 81 } else { 82 cfncn = crc; 83 pfncn = pcrc; 84 85 while ((ch = getopt(argc, argv, "o:")) != -1) 86 switch (ch) { 87 case 'o': 88 if (!strcmp(optarg, "1")) { 89 cfncn = csum1; 90 pfncn = psum1; 91 } else if (!strcmp(optarg, "2")) { 92 cfncn = csum2; 93 pfncn = psum2; 94 } else if (!strcmp(optarg, "3")) { 95 cfncn = crc32; 96 pfncn = pcrc; 97 } else { 98 warnx("illegal argument to -o option"); 99 usage(); 100 } 101 break; 102 case '?': 103 default: 104 usage(); 105 } 106 argc -= optind; 107 argv += optind; 108 } 109 110 fd = STDIN_FILENO; 111 fn = NULL; 112 rval = 0; 113 do { 114 if (*argv) { 115 fn = *argv++; 116 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 117 warn("%s", fn); 118 rval = 1; 119 continue; 120 } 121 } 122 if (cfncn(fd, &val, &len)) { 123 warn("%s", fn ? fn : "stdin"); 124 rval = 1; 125 } else 126 pfncn(fn, val, len); 127 (void)close(fd); 128 } while (*argv); 129 exit(rval); 130 } 131 132 static void 133 usage(void) 134 { 135 (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); 136 (void)fprintf(stderr, " sum [file ...]\n"); 137 exit(1); 138 } 139