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 #include <sys/types.h> 36 37 #include <err.h> 38 #include <fcntl.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 #include "extern.h" 45 46 static void usage(void) __dead2; 47 48 int 49 main(int argc, char **argv) 50 { 51 uint32_t val; 52 int ch, fd, rval; 53 off_t len; 54 char *fn, *p; 55 int (*cfncn)(int, uint32_t *, off_t *); 56 void (*pfncn)(char *, uint32_t, off_t); 57 58 if ((p = strrchr(argv[0], '/')) == NULL) 59 p = argv[0]; 60 else 61 ++p; 62 if (!strcmp(p, "sum")) { 63 cfncn = csum1; 64 pfncn = psum1; 65 ++argv; 66 } else { 67 cfncn = crc; 68 pfncn = pcrc; 69 70 while ((ch = getopt(argc, argv, "o:")) != -1) 71 switch (ch) { 72 case 'o': 73 if (!strcmp(optarg, "1")) { 74 cfncn = csum1; 75 pfncn = psum1; 76 } else if (!strcmp(optarg, "2")) { 77 cfncn = csum2; 78 pfncn = psum2; 79 } else if (!strcmp(optarg, "3")) { 80 cfncn = crc32; 81 pfncn = pcrc; 82 } else { 83 warnx("illegal argument to -o option"); 84 usage(); 85 } 86 break; 87 case '?': 88 default: 89 usage(); 90 } 91 argc -= optind; 92 argv += optind; 93 } 94 95 fd = STDIN_FILENO; 96 fn = NULL; 97 rval = 0; 98 do { 99 if (*argv) { 100 fn = *argv++; 101 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 102 warn("%s", fn); 103 rval = 1; 104 continue; 105 } 106 } 107 if (cfncn(fd, &val, &len)) { 108 warn("%s", fn ? fn : "stdin"); 109 rval = 1; 110 } else 111 pfncn(fn, val, len); 112 (void)close(fd); 113 } while (*argv); 114 exit(rval); 115 } 116 117 static void 118 usage(void) 119 { 120 (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); 121 (void)fprintf(stderr, " sum [file ...]\n"); 122 exit(1); 123 } 124