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 const 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 #if 0 45 static char sccsid[] = "@(#)cksum.c 8.2 (Berkeley) 4/28/95"; 46 #endif 47 static const char rcsid[] = 48 "$FreeBSD$"; 49 #endif /* not lint */ 50 51 #include <sys/types.h> 52 53 #include <err.h> 54 #include <fcntl.h> 55 #include <stdio.h> 56 #include <string.h> 57 #include <unistd.h> 58 59 #include "extern.h" 60 61 static void usage __P((void)); 62 63 int 64 main(argc, argv) 65 int argc; 66 char **argv; 67 { 68 register int ch, fd, rval; 69 u_int32_t len, val; 70 char *fn, *p; 71 int (*cfncn) __P((int, u_int32_t *, u_int32_t *)); 72 void (*pfncn) __P((char *, u_int32_t, u_int32_t)); 73 74 if ((p = rindex(argv[0], '/')) == NULL) 75 p = argv[0]; 76 else 77 ++p; 78 if (!strcmp(p, "sum")) { 79 cfncn = csum1; 80 pfncn = psum1; 81 ++argv; 82 } else { 83 cfncn = crc; 84 pfncn = pcrc; 85 86 while ((ch = getopt(argc, argv, "o:")) != -1) 87 switch (ch) { 88 case 'o': 89 if (!strcmp(optarg, "1")) { 90 cfncn = csum1; 91 pfncn = psum1; 92 } else if (!strcmp(optarg, "2")) { 93 cfncn = csum2; 94 pfncn = psum2; 95 } else if (!strcmp(optarg, "3")) { 96 cfncn = crc32; 97 pfncn = pcrc; 98 } else { 99 warnx("illegal argument to -o option"); 100 usage(); 101 } 102 break; 103 case '?': 104 default: 105 usage(); 106 } 107 argc -= optind; 108 argv += optind; 109 } 110 111 fd = STDIN_FILENO; 112 fn = NULL; 113 rval = 0; 114 do { 115 if (*argv) { 116 fn = *argv++; 117 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 118 warn("%s", fn); 119 rval = 1; 120 continue; 121 } 122 } 123 if (cfncn(fd, &val, &len)) { 124 warn("%s", fn ? fn : "stdin"); 125 rval = 1; 126 } else 127 pfncn(fn, val, len); 128 (void)close(fd); 129 } while (*argv); 130 exit(rval); 131 } 132 133 static void 134 usage() 135 { 136 (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); 137 (void)fprintf(stderr, " sum [file ...]\n"); 138 exit(1); 139 } 140