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 * $Id$ 37 */ 38 39 #ifndef lint 40 static char copyright[] = 41 "@(#) Copyright (c) 1991, 1993\n\ 42 The Regents of the University of California. All rights reserved.\n"; 43 #endif /* not lint */ 44 45 #ifndef lint 46 static char sccsid[] = "@(#)cksum.c 8.1 (Berkeley) 6/6/93"; 47 #endif /* not lint */ 48 49 #include <sys/cdefs.h> 50 #include <sys/types.h> 51 #include <err.h> 52 #include <errno.h> 53 #include <fcntl.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 #include "extern.h" 59 60 static void usage __P((void)); 61 62 int 63 main(argc, argv) 64 int argc; 65 char **argv; 66 { 67 extern int optind; 68 u_long len, val; 69 register int ch, fd, rval; 70 char *fn; 71 int (*cfncn) __P((int, unsigned long *, unsigned long *)); 72 void (*pfncn) __P((char *, unsigned long, unsigned long)); 73 74 cfncn = crc; 75 pfncn = pcrc; 76 while ((ch = getopt(argc, argv, "o:")) != -1) 77 switch(ch) { 78 case 'o': 79 if (*optarg == '1') { 80 cfncn = csum1; 81 pfncn = psum1; 82 } else if (*optarg == '2') { 83 cfncn = csum2; 84 pfncn = psum2; 85 } else { 86 warnx("illegal argument to -o option"); 87 usage(); 88 } 89 break; 90 case '?': 91 default: 92 usage(); 93 } 94 argc -= optind; 95 argv += optind; 96 97 fd = STDIN_FILENO; 98 fn = NULL; 99 rval = 0; 100 do { 101 if (*argv) { 102 fn = *argv++; 103 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 104 warn("%s", fn); 105 rval = 1; 106 continue; 107 } 108 } 109 if (cfncn(fd, &val, &len)) { 110 warn("%s", fn ? fn : "stdin"); 111 rval = 1; 112 } else 113 pfncn(fn, val, len); 114 (void)close(fd); 115 } while (*argv); 116 exit(rval); 117 } 118 119 static void 120 usage() 121 { 122 (void)fprintf(stderr, "usage: cksum [-o 1 | 2] [file ...]\n"); 123 exit(1); 124 } 125