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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1991, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)cksum.c 8.2 (Berkeley) 4/28/95"; 46 #endif 47 #endif /* not lint */ 48 49 #include <sys/cdefs.h> 50 __FBSDID("$FreeBSD$"); 51 52 #include <sys/types.h> 53 54 #include <err.h> 55 #include <fcntl.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 61 #include "extern.h" 62 63 static void usage(void); 64 65 int 66 main(int argc, char **argv) 67 { 68 uint32_t val; 69 int ch, fd, rval; 70 off_t len; 71 char *fn, *p; 72 int (*cfncn)(int, uint32_t *, off_t *); 73 void (*pfncn)(char *, u_int32_t, off_t); 74 75 if ((p = rindex(argv[0], '/')) == NULL) 76 p = argv[0]; 77 else 78 ++p; 79 if (!strcmp(p, "sum")) { 80 cfncn = csum1; 81 pfncn = psum1; 82 ++argv; 83 } else { 84 cfncn = crc; 85 pfncn = pcrc; 86 87 while ((ch = getopt(argc, argv, "o:")) != -1) 88 switch (ch) { 89 case 'o': 90 if (!strcmp(optarg, "1")) { 91 cfncn = csum1; 92 pfncn = psum1; 93 } else if (!strcmp(optarg, "2")) { 94 cfncn = csum2; 95 pfncn = psum2; 96 } else if (!strcmp(optarg, "3")) { 97 cfncn = crc32; 98 pfncn = pcrc; 99 } else { 100 warnx("illegal argument to -o option"); 101 usage(); 102 } 103 break; 104 case '?': 105 default: 106 usage(); 107 } 108 argc -= optind; 109 argv += optind; 110 } 111 112 fd = STDIN_FILENO; 113 fn = NULL; 114 rval = 0; 115 do { 116 if (*argv) { 117 fn = *argv++; 118 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 119 warn("%s", fn); 120 rval = 1; 121 continue; 122 } 123 } 124 if (cfncn(fd, &val, &len)) { 125 warn("%s", fn ? fn : "stdin"); 126 rval = 1; 127 } else 128 pfncn(fn, val, len); 129 (void)close(fd); 130 } while (*argv); 131 exit(rval); 132 } 133 134 static void 135 usage(void) 136 { 137 (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); 138 (void)fprintf(stderr, " sum [file ...]\n"); 139 exit(1); 140 } 141