1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * James W. Williams of NASA Goddard Space Flight Center. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)cksum.c 8.2 (Berkeley) 4/28/95 33 * $FreeBSD: src/usr.bin/cksum/cksum.c,v 1.18 2008/05/15 20:04:36 brooks Exp $ 34 * $DragonFly: src/usr.bin/cksum/cksum.c,v 1.6 2005/04/10 20:55:38 drhodus Exp $ 35 */ 36 37 #include <sys/types.h> 38 39 #include <err.h> 40 #include <fcntl.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 #include "extern.h" 47 48 static void usage(void); 49 50 int 51 main(int argc, char **argv) 52 { 53 uint32_t val; 54 int ch, fd, rval; 55 off_t len; 56 char *fn, *p; 57 int (*cfncn)(int, uint32_t *, off_t *); 58 void (*pfncn)(char *, uint32_t, off_t); 59 60 if ((p = strrchr(argv[0], '/')) == NULL) 61 p = argv[0]; 62 else 63 ++p; 64 if (!strcmp(p, "sum")) { 65 cfncn = csum1; 66 pfncn = psum1; 67 ++argv; 68 } else { 69 cfncn = crc; 70 pfncn = pcrc; 71 72 while ((ch = getopt(argc, argv, "o:")) != -1) 73 switch (ch) { 74 case 'o': 75 if (!strcmp(optarg, "1")) { 76 cfncn = csum1; 77 pfncn = psum1; 78 } else if (!strcmp(optarg, "2")) { 79 cfncn = csum2; 80 pfncn = psum2; 81 } else if (!strcmp(optarg, "3")) { 82 cfncn = crc32; 83 pfncn = pcrc; 84 } else { 85 warnx("illegal argument to -o option"); 86 usage(); 87 } 88 break; 89 case '?': 90 default: 91 usage(); 92 } 93 argc -= optind; 94 argv += optind; 95 } 96 97 fd = STDIN_FILENO; 98 fn = NULL; 99 rval = 0; 100 do { 101 if (*argv) { 102 fn = *argv++; 103 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 104 warn("%s", fn); 105 rval = 1; 106 continue; 107 } 108 } 109 if (cfncn(fd, &val, &len)) { 110 warn("%s", fn ? fn : "stdin"); 111 rval = 1; 112 } else 113 pfncn(fn, val, len); 114 close(fd); 115 } while (*argv); 116 exit(rval); 117 } 118 119 static void 120 usage(void) 121 { 122 fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); 123 fprintf(stderr, " sum [file ...]\n"); 124 exit(1); 125 } 126