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Annotation of src/usr.bin/cksum/cksum.c, Revision 1.1

1.1     ! deraadt     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: }