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 1.2 2003/06/17 04:29:25 dillon 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 __P((void)); 54 55 int 56 main(argc, argv) 57 int argc; 58 char **argv; 59 { 60 register int ch, fd, rval; 61 u_int32_t len, val; 62 char *fn, *p; 63 int (*cfncn) __P((int, u_int32_t *, u_int32_t *)); 64 void (*pfncn) __P((char *, u_int32_t, u_int32_t)); 65 66 if ((p = rindex(argv[0], '/')) == NULL) 67 p = argv[0]; 68 else 69 ++p; 70 if (!strcmp(p, "sum")) { 71 cfncn = csum1; 72 pfncn = psum1; 73 ++argv; 74 } else { 75 cfncn = crc; 76 pfncn = pcrc; 77 78 while ((ch = getopt(argc, argv, "o:")) != -1) 79 switch (ch) { 80 case 'o': 81 if (!strcmp(optarg, "1")) { 82 cfncn = csum1; 83 pfncn = psum1; 84 } else if (!strcmp(optarg, "2")) { 85 cfncn = csum2; 86 pfncn = psum2; 87 } else if (!strcmp(optarg, "3")) { 88 cfncn = crc32; 89 pfncn = pcrc; 90 } else { 91 warnx("illegal argument to -o option"); 92 usage(); 93 } 94 break; 95 case '?': 96 default: 97 usage(); 98 } 99 argc -= optind; 100 argv += optind; 101 } 102 103 fd = STDIN_FILENO; 104 fn = NULL; 105 rval = 0; 106 do { 107 if (*argv) { 108 fn = *argv++; 109 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 110 warn("%s", fn); 111 rval = 1; 112 continue; 113 } 114 } 115 if (cfncn(fd, &val, &len)) { 116 warn("%s", fn ? fn : "stdin"); 117 rval = 1; 118 } else 119 pfncn(fn, val, len); 120 (void)close(fd); 121 } while (*argv); 122 exit(rval); 123 } 124 125 static void 126 usage() 127 { 128 (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); 129 (void)fprintf(stderr, " sum [file ...]\n"); 130 exit(1); 131 } 132