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 static char sccsid[] = "@(#)cksum.c 8.1 (Berkeley) 6/6/93"; 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 void usage __P((void)); 58 59 int 60 main(argc, argv) 61 int argc; 62 char **argv; 63 { 64 extern int optind; 65 u_long len, val; 66 register int ch, fd, rval; 67 char *fn; 68 int (*cfncn) __P((int, unsigned long *, unsigned long *)); 69 void (*pfncn) __P((char *, unsigned long, unsigned long)); 70 71 cfncn = crc; 72 pfncn = pcrc; 73 while ((ch = getopt(argc, argv, "o:")) != EOF) 74 switch(ch) { 75 case 'o': 76 if (*optarg == '1') { 77 cfncn = csum1; 78 pfncn = psum1; 79 } else if (*optarg == '2') { 80 cfncn = csum2; 81 pfncn = psum2; 82 } else { 83 (void)fprintf(stderr, 84 "cksum: illegal argument to -o option\n"); 85 usage(); 86 } 87 break; 88 case '?': 89 default: 90 usage(); 91 } 92 argc -= optind; 93 argv += optind; 94 95 fd = STDIN_FILENO; 96 fn = NULL; 97 rval = 0; 98 do { 99 if (*argv) { 100 fn = *argv++; 101 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 102 (void)fprintf(stderr, "cksum: %s: %s\n", 103 fn, strerror(errno)); 104 rval = 1; 105 continue; 106 } 107 } 108 if (cfncn(fd, &val, &len)) { 109 (void)fprintf(stderr, "cksum: %s: %s\n", 110 fn ? fn : "stdin", strerror(errno)); 111 rval = 1; 112 } else 113 pfncn(fn, val, len); 114 (void)close(fd); 115 } while (*argv); 116 exit(rval); 117 } 118 119 void 120 usage() 121 { 122 (void)fprintf(stderr, "usage: cksum [-o 1 | 2] [file ...]\n"); 123 exit(1); 124 } 125