1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * James W. Williams of the University of Maryland. 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 char copyright[] = 39 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\ 40 All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 static char sccsid[] = "@(#)cksum.c 5.3 (Berkeley) 4/4/91"; 45 #endif /* not lint */ 46 47 #include <sys/cdefs.h> 48 #include <sys/types.h> 49 #include <fcntl.h> 50 #include <unistd.h> 51 #include <stdio.h> 52 #include <errno.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include "extern.h" 56 57 main(argc, argv) 58 int argc; 59 char **argv; 60 { 61 extern int optind; 62 u_long len, val; 63 register int ch, fd, rval; 64 char *fn; 65 int (*cfncn) __P((int, unsigned long *, unsigned long *)); 66 void (*pfncn) __P((char *, unsigned long, unsigned long)); 67 68 cfncn = crc; 69 pfncn = pcrc; 70 while ((ch = getopt(argc, argv, "o:")) != EOF) 71 switch(ch) { 72 case 'o': 73 if (*optarg == '1') { 74 cfncn = csum1; 75 pfncn = psum1; 76 } else if (*optarg == '2') { 77 cfncn = csum2; 78 pfncn = psum2; 79 } else { 80 (void)fprintf(stderr, 81 "cksum: illegal argument to -o option\n"); 82 usage(); 83 } 84 break; 85 case '?': 86 default: 87 usage(); 88 } 89 argc -= optind; 90 argv += optind; 91 92 fd = STDIN_FILENO; 93 fn = "stdin"; 94 rval = 0; 95 do { 96 if (*argv) { 97 fn = *argv++; 98 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 99 (void)fprintf(stderr, 100 "cksum: %s: %s\n", fn, strerror(errno)); 101 rval = 1; 102 continue; 103 } 104 } 105 if (cfncn(fd, &val, &len)) { 106 (void)fprintf(stderr, 107 "cksum: %s: %s\n", fn, strerror(errno)); 108 rval = 1; 109 } else 110 pfncn(fn, val, len); 111 (void)close(fd); 112 } while (*argv); 113 exit(rval); 114 } 115 116 usage() 117 { 118 (void)fprintf(stderr, "usage: cksum [-o 1 | 2] [file ...]\n"); 119 exit(1); 120 } 121