usr.bin/hexdump/hexdump.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1989, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)hexdump.c        8.1 (Berkeley) 6/6/93
  35  * $FreeBSD: src/usr.bin/hexdump/hexdump.c,v 1.4.2.2 2002/07/23 14:27:06 tjr Exp $
  36  * $DragonFly: src/usr.bin/hexdump/hexdump.c,v 1.5 2005/04/10 20:55:38 drhodus Exp $
  37  */
  38
  39 #include <sys/types.h>
  40 #include <locale.h>
  41 #include <stdlib.h>
  42 #include <stdio.h>
  43 #include <string.h>
  44 #include "hexdump.h"
  45
  46 FS *fshead;                             /* head of format strings */
  47 int blocksize;                          /* data block size */
  48 int exitval;                            /* final exit value */
  49 int length = -1;                        /* max bytes to read */
  50
  51 int
  52 main(int argc, char **argv)
  53 {
  54         FS *tfs;
  55         char *p;
  56
  57         (void)setlocale(LC_ALL, "");
  58
  59         if (!(p = strrchr(argv[0], 'o')) || strcmp(p, "od"))
  60                 newsyntax(argc, &argv);
  61         else
  62                 oldsyntax(argc, &argv);
  63
  64         /* figure out the data block size */
  65         for (blocksize = 0, tfs = fshead; tfs; tfs = tfs->nextfs) {
  66                 tfs->bcnt = size(tfs);
  67                 if (blocksize < tfs->bcnt)
  68                         blocksize = tfs->bcnt;
  69         }
  70         /* rewrite the rules, do syntax checking */
  71         for (tfs = fshead; tfs; tfs = tfs->nextfs)
  72                 rewrite(tfs);
  73
  74         (void)next(argv);
  75         display();
  76         exit(exitval);
  77 }