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 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved. 37 * @(#)cksum.c 8.2 (Berkeley) 4/28/95 38 * $FreeBSD: src/usr.bin/cksum/cksum.c,v 1.11.2.1 2001/07/30 10:16:29 dd Exp $ 39 * $DragonFly: src/usr.bin/cksum/cksum.c,v 1.4 2003/11/03 19:31:28 eirikn Exp $ 40 */ 41 42 #include <sys/types.h> 43 44 #include <err.h> 45 #include <fcntl.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 51 #include "extern.h" 52 53 static void usage(void); 54 55 int 56 main(int argc, char **argv) 57 { 58 register int ch, fd, rval; 59 u_int32_t len, val; 60 char *fn, *p; 61 int (*cfncn)(int, u_int32_t *, u_int32_t *); 62 void (*pfncn)(char *, u_int32_t, u_int32_t); 63 64 if ((p = rindex(argv[0], '/')) == NULL) 65 p = argv[0]; 66 else 67 ++p; 68 if (!strcmp(p, "sum")) { 69 cfncn = csum1; 70 pfncn = psum1; 71 ++argv; 72 } else { 73 cfncn = crc; 74 pfncn = pcrc; 75 76 while ((ch = getopt(argc, argv, "o:")) != -1) 77 switch (ch) { 78 case 'o': 79 if (!strcmp(optarg, "1")) { 80 cfncn = csum1; 81 pfncn = psum1; 82 } else if (!strcmp(optarg, "2")) { 83 cfncn = csum2; 84 pfncn = psum2; 85 } else if (!strcmp(optarg, "3")) { 86 cfncn = crc32; 87 pfncn = pcrc; 88 } else { 89 warnx("illegal argument to -o option"); 90 usage(); 91 } 92 break; 93 case '?': 94 default: 95 usage(); 96 } 97 argc -= optind; 98 argv += optind; 99 } 100 101 fd = STDIN_FILENO; 102 fn = NULL; 103 rval = 0; 104 do { 105 if (*argv) { 106 fn = *argv++; 107 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 108 warn("%s", fn); 109 rval = 1; 110 continue; 111 } 112 } 113 if (cfncn(fd, &val, &len)) { 114 warn("%s", fn ? fn : "stdin"); 115 rval = 1; 116 } else 117 pfncn(fn, val, len); 118 (void)close(fd); 119 } while (*argv); 120 exit(rval); 121 } 122 123 static void 124 usage(void) 125 { 126 (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); 127 (void)fprintf(stderr, " sum [file ...]\n"); 128 exit(1); 129 } 130