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 * 4. 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 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1991, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)cksum.c 8.2 (Berkeley) 4/28/95"; 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/cdefs.h> 46 __FBSDID("$FreeBSD$"); 47 48 #include <sys/types.h> 49 50 #include <err.h> 51 #include <fcntl.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 57 #include "extern.h" 58 59 static void usage(void); 60 61 int 62 main(int argc, char **argv) 63 { 64 uint32_t val; 65 int ch, fd, rval; 66 off_t len; 67 char *fn, *p; 68 int (*cfncn)(int, uint32_t *, off_t *); 69 void (*pfncn)(char *, uint32_t, off_t); 70 71 if ((p = rindex(argv[0], '/')) == NULL) 72 p = argv[0]; 73 else 74 ++p; 75 if (!strcmp(p, "sum")) { 76 cfncn = csum1; 77 pfncn = psum1; 78 ++argv; 79 } else { 80 cfncn = crc; 81 pfncn = pcrc; 82 83 while ((ch = getopt(argc, argv, "o:")) != -1) 84 switch (ch) { 85 case 'o': 86 if (!strcmp(optarg, "1")) { 87 cfncn = csum1; 88 pfncn = psum1; 89 } else if (!strcmp(optarg, "2")) { 90 cfncn = csum2; 91 pfncn = psum2; 92 } else if (!strcmp(optarg, "3")) { 93 cfncn = crc32; 94 pfncn = pcrc; 95 } else { 96 warnx("illegal argument to -o option"); 97 usage(); 98 } 99 break; 100 case '?': 101 default: 102 usage(); 103 } 104 argc -= optind; 105 argv += optind; 106 } 107 108 fd = STDIN_FILENO; 109 fn = NULL; 110 rval = 0; 111 do { 112 if (*argv) { 113 fn = *argv++; 114 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 115 warn("%s", fn); 116 rval = 1; 117 continue; 118 } 119 } 120 if (cfncn(fd, &val, &len)) { 121 warn("%s", fn ? fn : "stdin"); 122 rval = 1; 123 } else 124 pfncn(fn, val, len); 125 (void)close(fd); 126 } while (*argv); 127 exit(rval); 128 } 129 130 static void 131 usage(void) 132 { 133 (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); 134 (void)fprintf(stderr, " sum [file ...]\n"); 135 exit(1); 136 } 137