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 #endif /* not lint */ 43 44 #include <sys/cdefs.h> 45 #include <sys/types.h> 46 47 #include <err.h> 48 #include <fcntl.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 54 #include "extern.h" 55 56 static void usage(void) __dead2; 57 58 int 59 main(int argc, char **argv) 60 { 61 uint32_t val; 62 int ch, fd, rval; 63 off_t len; 64 char *fn, *p; 65 int (*cfncn)(int, uint32_t *, off_t *); 66 void (*pfncn)(char *, uint32_t, off_t); 67 68 if ((p = strrchr(argv[0], '/')) == NULL) 69 p = argv[0]; 70 else 71 ++p; 72 if (!strcmp(p, "sum")) { 73 cfncn = csum1; 74 pfncn = psum1; 75 ++argv; 76 } else { 77 cfncn = crc; 78 pfncn = pcrc; 79 80 while ((ch = getopt(argc, argv, "o:")) != -1) 81 switch (ch) { 82 case 'o': 83 if (!strcmp(optarg, "1")) { 84 cfncn = csum1; 85 pfncn = psum1; 86 } else if (!strcmp(optarg, "2")) { 87 cfncn = csum2; 88 pfncn = psum2; 89 } else if (!strcmp(optarg, "3")) { 90 cfncn = crc32; 91 pfncn = pcrc; 92 } else { 93 warnx("illegal argument to -o option"); 94 usage(); 95 } 96 break; 97 case '?': 98 default: 99 usage(); 100 } 101 argc -= optind; 102 argv += optind; 103 } 104 105 fd = STDIN_FILENO; 106 fn = NULL; 107 rval = 0; 108 do { 109 if (*argv) { 110 fn = *argv++; 111 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 112 warn("%s", fn); 113 rval = 1; 114 continue; 115 } 116 } 117 if (cfncn(fd, &val, &len)) { 118 warn("%s", fn ? fn : "stdin"); 119 rval = 1; 120 } else 121 pfncn(fn, val, len); 122 (void)close(fd); 123 } while (*argv); 124 exit(rval); 125 } 126 127 static void 128 usage(void) 129 { 130 (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); 131 (void)fprintf(stderr, " sum [file ...]\n"); 132 exit(1); 133 } 134