cksum.c revision 92920
1116742Ssam/*- 2116904Ssam * Copyright (c) 1991, 1993 3116742Ssam * The Regents of the University of California. All rights reserved. 4116742Ssam * 5116742Ssam * This code is derived from software contributed to Berkeley by 6116742Ssam * James W. Williams of NASA Goddard Space Flight Center. 7116742Ssam * 8116742Ssam * Redistribution and use in source and binary forms, with or without 9116742Ssam * modification, are permitted provided that the following conditions 10116742Ssam * are met: 11116742Ssam * 1. Redistributions of source code must retain the above copyright 12116742Ssam * notice, this list of conditions and the following disclaimer. 13116742Ssam * 2. Redistributions in binary form must reproduce the above copyright 14116904Ssam * notice, this list of conditions and the following disclaimer in the 15116904Ssam * documentation and/or other materials provided with the distribution. 16116742Ssam * 3. All advertising materials mentioning features or use of this software 17116904Ssam * must display the following acknowledgement: 18116904Ssam * This product includes software developed by the University of 19116904Ssam * California, Berkeley and its contributors. 20116742Ssam * 4. Neither the name of the University nor the names of its contributors 21116904Ssam * may be used to endorse or promote products derived from this software 22116904Ssam * without specific prior written permission. 23116904Ssam * 24116904Ssam * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25116904Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26116904Ssam * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27116904Ssam * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28116904Ssam * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29116904Ssam * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30116904Ssam * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31116904Ssam * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32116742Ssam * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33116742Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34116742Ssam * SUCH DAMAGE. 35116742Ssam */ 36116742Ssam 37116742Ssam#ifndef lint 38116742Ssamstatic const char copyright[] = 39116742Ssam"@(#) Copyright (c) 1991, 1993\n\ 40116742Ssam The Regents of the University of California. All rights reserved.\n"; 41116742Ssam#endif /* not lint */ 42116742Ssam 43116742Ssam#ifndef lint 44116742Ssam#if 0 45116742Ssamstatic char sccsid[] = "@(#)cksum.c 8.2 (Berkeley) 4/28/95"; 46116742Ssam#endif 47116742Ssamstatic const char rcsid[] = 48116742Ssam "$FreeBSD: head/usr.bin/cksum/cksum.c 92920 2002-03-22 01:22:50Z imp $"; 49116742Ssam#endif /* not lint */ 50116742Ssam 51116742Ssam#include <sys/types.h> 52116742Ssam 53116742Ssam#include <err.h> 54116742Ssam#include <fcntl.h> 55116742Ssam#include <stdio.h> 56116742Ssam#include <stdlib.h> 57116742Ssam#include <string.h> 58116742Ssam#include <unistd.h> 59116742Ssam 60116742Ssam#include "extern.h" 61116742Ssam 62116742Ssamstatic void usage(void); 63116742Ssam 64116742Ssamint 65116742Ssammain(argc, argv) 66116742Ssam int argc; 67116742Ssam char **argv; 68116742Ssam{ 69116742Ssam int ch, fd, rval; 70116742Ssam u_int32_t len, val; 71116742Ssam char *fn, *p; 72116742Ssam int (*cfncn)(int, u_int32_t *, u_int32_t *); 73117817Ssam void (*pfncn)(char *, u_int32_t, u_int32_t); 74117817Ssam 75116742Ssam if ((p = rindex(argv[0], '/')) == NULL) 76116742Ssam p = argv[0]; 77116742Ssam else 78116742Ssam ++p; 79116742Ssam if (!strcmp(p, "sum")) { 80116742Ssam cfncn = csum1; 81116742Ssam pfncn = psum1; 82116742Ssam ++argv; 83116742Ssam } else { 84116742Ssam cfncn = crc; 85116742Ssam pfncn = pcrc; 86116742Ssam 87116742Ssam while ((ch = getopt(argc, argv, "o:")) != -1) 88116742Ssam switch (ch) { 89116742Ssam case 'o': 90116742Ssam if (!strcmp(optarg, "1")) { 91116742Ssam cfncn = csum1; 92116742Ssam pfncn = psum1; 93116742Ssam } else if (!strcmp(optarg, "2")) { 94116742Ssam cfncn = csum2; 95116742Ssam pfncn = psum2; 96116742Ssam } else if (!strcmp(optarg, "3")) { 97116742Ssam cfncn = crc32; 98116742Ssam pfncn = pcrc; 99116742Ssam } else { 100116742Ssam warnx("illegal argument to -o option"); 101116742Ssam usage(); 102116742Ssam } 103116742Ssam break; 104116742Ssam case '?': 105116742Ssam default: 106116742Ssam usage(); 107116742Ssam } 108116742Ssam argc -= optind; 109116742Ssam argv += optind; 110116742Ssam } 111116742Ssam 112116742Ssam fd = STDIN_FILENO; 113116742Ssam fn = NULL; 114116742Ssam rval = 0; 115116742Ssam do { 116116742Ssam if (*argv) { 117116742Ssam fn = *argv++; 118116742Ssam if ((fd = open(fn, O_RDONLY, 0)) < 0) { 119116742Ssam warn("%s", fn); 120116742Ssam rval = 1; 121116742Ssam continue; 122116742Ssam } 123116742Ssam } 124116742Ssam if (cfncn(fd, &val, &len)) { 125116742Ssam warn("%s", fn ? fn : "stdin"); 126116742Ssam rval = 1; 127116742Ssam } else 128116742Ssam pfncn(fn, val, len); 129116742Ssam (void)close(fd); 130116742Ssam } while (*argv); 131116742Ssam exit(rval); 132116742Ssam} 133116742Ssam 134116742Ssamstatic void 135116742Ssamusage() 136116742Ssam{ 137116742Ssam (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); 138119150Ssam (void)fprintf(stderr, " sum [file ...]\n"); 139119150Ssam exit(1); 140116742Ssam} 141116742Ssam