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#include <sys/cdefs.h> 38#ifndef lint 39__used static const char copyright[] = 40"@(#) Copyright (c) 1991, 1993\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42#endif /* not lint */ 43 44#ifndef lint 45#if 0 46static char sccsid[] = "@(#)cksum.c 8.2 (Berkeley) 4/28/95"; 47#endif 48#endif /* not lint */ 49 50#include <sys/cdefs.h> 51__FBSDID("$FreeBSD: src/usr.bin/cksum/cksum.c,v 1.17 2003/03/13 23:32:28 robert Exp $"); 52 53#include <sys/types.h> 54 55#include <err.h> 56#include <fcntl.h> 57#include <stdint.h> 58#include <stdio.h> 59#include <stdlib.h> 60#include <string.h> 61#include <unistd.h> 62 63#include "extern.h" 64 65static void usage(void); 66 67int 68main(int argc, char **argv) 69{ 70 uint32_t val; 71 int ch, fd, rval; 72 off_t len; 73 char *fn, *p; 74 int (*cfncn)(int, uint32_t *, off_t *); 75 void (*pfncn)(char *, u_int32_t, off_t); 76 77 cfncn=NULL; 78 79 if(*argv) { 80 if ((p = rindex(argv[0], '/')) == NULL) 81 p = argv[0]; 82 else 83 ++p; 84 if (!strcmp(p, "sum")) { 85 cfncn = csum1; 86 pfncn = psum1; 87 ++argv; 88 } 89 } 90 91 if(!cfncn) { 92 cfncn = crc; 93 pfncn = pcrc; 94 95 while ((ch = getopt(argc, argv, "o:")) != -1) 96 switch (ch) { 97 case 'o': 98 if (!strcmp(optarg, "1")) { 99 cfncn = csum1; 100 pfncn = psum1; 101 } else if (!strcmp(optarg, "2")) { 102 cfncn = csum2; 103 pfncn = psum2; 104 } else if (!strcmp(optarg, "3")) { 105 cfncn = crc32; 106 pfncn = pcrc; 107 } else { 108 warnx("illegal argument to -o option"); 109 usage(); 110 } 111 break; 112 case '?': 113 default: 114 usage(); 115 } 116// argc -= optind; 117 argv += optind; 118 } 119 120 fd = STDIN_FILENO; 121 fn = NULL; 122 rval = 0; 123 do { 124 if (*argv) { 125 fn = *argv++; 126 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 127 warn("%s", fn); 128 rval = 1; 129 continue; 130 } 131 } 132 if (cfncn(fd, &val, &len)) { 133 warn("%s", fn ? fn : "stdin"); 134 rval = 1; 135 } else 136 pfncn(fn, val, len); 137 (void)close(fd); 138 } while (*argv); 139 exit(rval); 140} 141 142static void 143usage(void) 144{ 145 (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); 146 (void)fprintf(stderr, " sum [file ...]\n"); 147 exit(1); 148} 149