1 /* $NetBSD: cksum.c,v 1.7 1995/09/02 05:45:18 jtc Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * James W. Williams of NASA Goddard Space Flight Center. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 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 #if 0 47 static char sccsid[] = "@(#)cksum.c 8.2 (Berkeley) 4/28/95"; 48 #endif 49 static char rcsid[] = "$NetBSD: cksum.c,v 1.7 1995/09/02 05:45:18 jtc Exp $"; 50 #endif /* not lint */ 51 52 #include <sys/cdefs.h> 53 #include <sys/types.h> 54 55 #include <err.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 #include "extern.h" 64 65 void usage __P((void)); 66 67 int 68 main(argc, argv) 69 int argc; 70 char **argv; 71 { 72 register int ch, fd, rval; 73 u_int32_t len, val; 74 char *fn; 75 int (*cfncn) __P((int, u_int32_t *, u_int32_t *)); 76 void (*pfncn) __P((char *, u_int32_t, u_int32_t)); 77 extern char *__progname; 78 79 if (!strcmp(__progname, "sum")) { 80 cfncn = csum1; 81 pfncn = psum1; 82 } else { 83 cfncn = crc; 84 pfncn = pcrc; 85 } 86 87 while ((ch = getopt(argc, argv, "o:")) != -1) 88 switch(ch) { 89 case 'o': 90 if (!strcmp(optarg, "1")) { 91 cfncn = csum1; 92 pfncn = psum1; 93 } else if (!strcmp(optarg, "2")) { 94 cfncn = csum2; 95 pfncn = psum2; 96 } else { 97 warnx("illegal argument to -o option"); 98 usage(); 99 } 100 break; 101 case '?': 102 default: 103 usage(); 104 } 105 argc -= optind; 106 argv += optind; 107 108 fd = STDIN_FILENO; 109 fn = NULL; 110 rval = 0; 111 do { 112 if (*argv) { 113 fn = *argv++; 114 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 115 warn("%s", fn); 116 rval = 1; 117 continue; 118 } 119 } 120 if (cfncn(fd, &val, &len)) { 121 warn("%s", fn ? fn : "stdin"); 122 rval = 1; 123 } else 124 pfncn(fn, val, len); 125 (void)close(fd); 126 } while (*argv); 127 exit(rval); 128 } 129 130 void 131 usage() 132 { 133 134 (void)fprintf(stderr, "usage: cksum [-o 1 | 2] [file ...]\n"); 135 exit(1); 136 } 137