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 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 /* from: static char sccsid[] = "@(#)cksum.c 8.1 (Berkeley) 6/6/93"; */ 45 static char *rcsid = "$Id: cksum.c,v 1.3 1993/11/02 07:33:10 cgd Exp $"; 46 #endif /* not lint */ 47 48 #include <sys/cdefs.h> 49 #include <sys/types.h> 50 #include <fcntl.h> 51 #include <unistd.h> 52 #include <stdio.h> 53 #include <errno.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include "extern.h" 57 58 void usage __P((void)); 59 60 int 61 main(argc, argv) 62 int argc; 63 char **argv; 64 { 65 extern int optind; 66 u_long len, val; 67 register int ch, fd, rval; 68 char *fn; 69 int (*cfncn) __P((int, unsigned long *, unsigned long *)); 70 void (*pfncn) __P((char *, unsigned long, unsigned long)); 71 72 cfncn = crc; 73 pfncn = pcrc; 74 while ((ch = getopt(argc, argv, "o:")) != EOF) 75 switch(ch) { 76 case 'o': 77 if (*optarg == '1') { 78 cfncn = csum1; 79 pfncn = psum1; 80 } else if (*optarg == '2') { 81 cfncn = csum2; 82 pfncn = psum2; 83 } else { 84 (void)fprintf(stderr, 85 "cksum: illegal argument to -o option\n"); 86 usage(); 87 } 88 break; 89 case '?': 90 default: 91 usage(); 92 } 93 argc -= optind; 94 argv += optind; 95 96 fd = STDIN_FILENO; 97 fn = NULL; 98 rval = 0; 99 do { 100 if (*argv) { 101 fn = *argv++; 102 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 103 (void)fprintf(stderr, "cksum: %s: %s\n", 104 fn, strerror(errno)); 105 rval = 1; 106 continue; 107 } 108 } 109 if (cfncn(fd, &val, &len)) { 110 (void)fprintf(stderr, "cksum: %s: %s\n", 111 fn ? fn : "stdin", strerror(errno)); 112 rval = 1; 113 } else 114 pfncn(fn, val, len); 115 (void)close(fd); 116 } while (*argv); 117 exit(rval); 118 } 119 120 void 121 usage() 122 { 123 (void)fprintf(stderr, "usage: cksum [-o 1 | 2] [file ...]\n"); 124 exit(1); 125 } 126