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Annotation of src/usr.bin/cksum/cksum.c, Revision 1.4

1.4     ! grr         1: /*     $OpenBSD: cksum.c,v 1.3 1997/06/27 19:02:54 deraadt Exp $       */
1.1       deraadt     2: /*     $NetBSD: cksum.c,v 1.7 1995/09/02 05:45:18 jtc Exp $    */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1991, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * James W. Williams of NASA Goddard Space Flight Center.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. All advertising materials mentioning features or use of this software
                     20:  *    must display the following acknowledgement:
                     21:  *     This product includes software developed by the University of
                     22:  *     California, Berkeley and its contributors.
                     23:  * 4. Neither the name of the University nor the names of its contributors
                     24:  *    may be used to endorse or promote products derived from this software
                     25:  *    without specific prior written permission.
                     26:  *
                     27:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     28:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     29:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     30:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     31:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     32:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     33:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     34:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     35:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     36:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     37:  * SUCH DAMAGE.
                     38:  */
                     39:
                     40: #ifndef lint
                     41: static char copyright[] =
                     42: "@(#) Copyright (c) 1991, 1993\n\
                     43:        The Regents of the University of California.  All rights reserved.\n";
                     44: #endif /* not lint */
                     45:
                     46: #ifndef lint
                     47: #if 0
                     48: static char sccsid[] = "@(#)cksum.c    8.2 (Berkeley) 4/28/95";
                     49: #endif
1.4     ! grr        50: static char rcsid[] = "$OpenBSD: cksum.c,v 1.3 1997/06/27 19:02:54 deraadt Exp $";
1.1       deraadt    51: #endif /* not lint */
                     52:
                     53: #include <sys/cdefs.h>
                     54: #include <sys/types.h>
                     55:
                     56: #include <err.h>
                     57: #include <errno.h>
                     58: #include <fcntl.h>
                     59: #include <stdio.h>
                     60: #include <stdlib.h>
                     61: #include <string.h>
                     62: #include <unistd.h>
1.4     ! grr        63: #include <locale.h>
1.1       deraadt    64:
                     65: #include "extern.h"
                     66:
                     67: void usage __P((void));
                     68:
                     69: int
                     70: main(argc, argv)
                     71:        int argc;
                     72:        char **argv;
                     73: {
                     74:        register int ch, fd, rval;
                     75:        u_int32_t len, val;
                     76:        char *fn;
                     77:        int (*cfncn) __P((int, u_int32_t *, u_int32_t *));
                     78:        void (*pfncn) __P((char *, u_int32_t, u_int32_t));
                     79:        extern char *__progname;
1.3       deraadt    80:
                     81:        setlocale(LC_ALL, "");
1.1       deraadt    82:
                     83:        if (!strcmp(__progname, "sum")) {
                     84:                cfncn = csum1;
                     85:                pfncn = psum1;
                     86:        } else {
                     87:                cfncn = crc;
                     88:                pfncn = pcrc;
                     89:        }
                     90:
                     91:        while ((ch = getopt(argc, argv, "o:")) != -1)
                     92:                switch(ch) {
                     93:                case 'o':
                     94:                        if (!strcmp(optarg, "1")) {
                     95:                                cfncn = csum1;
                     96:                                pfncn = psum1;
                     97:                        } else if (!strcmp(optarg, "2")) {
                     98:                                cfncn = csum2;
                     99:                                pfncn = psum2;
                    100:                        } else {
                    101:                                warnx("illegal argument to -o option");
                    102:                                usage();
                    103:                        }
                    104:                        break;
                    105:                case '?':
                    106:                default:
                    107:                        usage();
                    108:                }
                    109:        argc -= optind;
                    110:        argv += optind;
                    111:
                    112:        fd = STDIN_FILENO;
                    113:        fn = NULL;
                    114:        rval = 0;
                    115:        do {
                    116:                if (*argv) {
                    117:                        fn = *argv++;
                    118:                        if ((fd = open(fn, O_RDONLY, 0)) < 0) {
                    119:                                warn("%s", fn);
                    120:                                rval = 1;
                    121:                                continue;
                    122:                        }
                    123:                }
                    124:                if (cfncn(fd, &val, &len)) {
                    125:                        warn("%s", fn ? fn : "stdin");
                    126:                        rval = 1;
                    127:                } else
                    128:                        pfncn(fn, val, len);
                    129:                (void)close(fd);
                    130:        } while (*argv);
                    131:        exit(rval);
                    132: }
                    133:
                    134: void
                    135: usage()
                    136: {
                    137:
                    138:        (void)fprintf(stderr, "usage: cksum [-o 1 | 2] [file ...]\n");
                    139:        exit(1);
                    140: }