cksum.c revision 26922
11590Srgrimes/*- 21590Srgrimes * Copyright (c) 1991, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * This code is derived from software contributed to Berkeley by 61590Srgrimes * James W. Williams of NASA Goddard Space Flight Center. 71590Srgrimes * 81590Srgrimes * Redistribution and use in source and binary forms, with or without 91590Srgrimes * modification, are permitted provided that the following conditions 101590Srgrimes * are met: 111590Srgrimes * 1. Redistributions of source code must retain the above copyright 121590Srgrimes * notice, this list of conditions and the following disclaimer. 131590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141590Srgrimes * notice, this list of conditions and the following disclaimer in the 151590Srgrimes * documentation and/or other materials provided with the distribution. 161590Srgrimes * 3. All advertising materials mentioning features or use of this software 171590Srgrimes * must display the following acknowledgement: 181590Srgrimes * This product includes software developed by the University of 191590Srgrimes * California, Berkeley and its contributors. 201590Srgrimes * 4. Neither the name of the University nor the names of its contributors 211590Srgrimes * may be used to endorse or promote products derived from this software 221590Srgrimes * without specific prior written permission. 231590Srgrimes * 241590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341590Srgrimes * SUCH DAMAGE. 3526922Scharnier * 3626922Scharnier * $Id$ 371590Srgrimes */ 381590Srgrimes 391590Srgrimes#ifndef lint 401590Srgrimesstatic char copyright[] = 411590Srgrimes"@(#) Copyright (c) 1991, 1993\n\ 421590Srgrimes The Regents of the University of California. All rights reserved.\n"; 431590Srgrimes#endif /* not lint */ 441590Srgrimes 451590Srgrimes#ifndef lint 461590Srgrimesstatic char sccsid[] = "@(#)cksum.c 8.1 (Berkeley) 6/6/93"; 471590Srgrimes#endif /* not lint */ 481590Srgrimes 491590Srgrimes#include <sys/cdefs.h> 501590Srgrimes#include <sys/types.h> 5126922Scharnier#include <err.h> 5226922Scharnier#include <errno.h> 531590Srgrimes#include <fcntl.h> 541590Srgrimes#include <stdio.h> 551590Srgrimes#include <stdlib.h> 561590Srgrimes#include <string.h> 5726922Scharnier#include <unistd.h> 581590Srgrimes#include "extern.h" 591590Srgrimes 6026922Scharnierstatic void usage __P((void)); 611590Srgrimes 621590Srgrimesint 631590Srgrimesmain(argc, argv) 641590Srgrimes int argc; 651590Srgrimes char **argv; 661590Srgrimes{ 671590Srgrimes extern int optind; 681590Srgrimes u_long len, val; 691590Srgrimes register int ch, fd, rval; 701590Srgrimes char *fn; 711590Srgrimes int (*cfncn) __P((int, unsigned long *, unsigned long *)); 721590Srgrimes void (*pfncn) __P((char *, unsigned long, unsigned long)); 731590Srgrimes 741590Srgrimes cfncn = crc; 751590Srgrimes pfncn = pcrc; 7624360Simp while ((ch = getopt(argc, argv, "o:")) != -1) 771590Srgrimes switch(ch) { 781590Srgrimes case 'o': 791590Srgrimes if (*optarg == '1') { 801590Srgrimes cfncn = csum1; 811590Srgrimes pfncn = psum1; 821590Srgrimes } else if (*optarg == '2') { 831590Srgrimes cfncn = csum2; 841590Srgrimes pfncn = psum2; 851590Srgrimes } else { 8626922Scharnier warnx("illegal argument to -o option"); 871590Srgrimes usage(); 881590Srgrimes } 891590Srgrimes break; 901590Srgrimes case '?': 911590Srgrimes default: 921590Srgrimes usage(); 931590Srgrimes } 941590Srgrimes argc -= optind; 951590Srgrimes argv += optind; 961590Srgrimes 971590Srgrimes fd = STDIN_FILENO; 981590Srgrimes fn = NULL; 991590Srgrimes rval = 0; 1001590Srgrimes do { 1011590Srgrimes if (*argv) { 1021590Srgrimes fn = *argv++; 1031590Srgrimes if ((fd = open(fn, O_RDONLY, 0)) < 0) { 10426922Scharnier warn("%s", fn); 1051590Srgrimes rval = 1; 1061590Srgrimes continue; 1071590Srgrimes } 1081590Srgrimes } 1091590Srgrimes if (cfncn(fd, &val, &len)) { 11026922Scharnier warn("%s", fn ? fn : "stdin"); 1111590Srgrimes rval = 1; 1121590Srgrimes } else 1131590Srgrimes pfncn(fn, val, len); 1141590Srgrimes (void)close(fd); 1151590Srgrimes } while (*argv); 1161590Srgrimes exit(rval); 1171590Srgrimes} 1181590Srgrimes 11926922Scharnierstatic void 1201590Srgrimesusage() 1211590Srgrimes{ 1221590Srgrimes (void)fprintf(stderr, "usage: cksum [-o 1 | 2] [file ...]\n"); 1231590Srgrimes exit(1); 1241590Srgrimes} 125