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
  34 #ifndef lint
  35 static const char copyright[] =
  36 "@(#) Copyright (c) 1989, 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)hexdump.c   8.1 (Berkeley) 6/6/93";
  43 #endif
  44 #endif /* not lint */
  45 #include <sys/cdefs.h>
  46 __FBSDID("$FreeBSD: src/usr.bin/hexdump/hexdump.c,v 1.7 2002/09/04 23:29:01 dwmalone Exp $");
  47
  48 #include <sys/types.h>
  49 #include <locale.h>
  50 #include <stdlib.h>
  51 #include <stdio.h>
  52 #include <string.h>
  53 #include "hexdump.h"
  54
  55 FS *fshead;                             /* head of format strings */
  56 int blocksize;                          /* data block size */
  57 int exitval;                            /* final exit value */
  58 int length = -1;                        /* max bytes to read */
  59
  60 int
  61 main(int argc, char *argv[])
  62 {
  63         FS *tfs;
  64         char *p;
  65
  66         (void)setlocale(LC_ALL, "");
  67
  68         if (!(p = rindex(argv[0], 'o')) || strcmp(p, "od"))
  69                 newsyntax(argc, &argv);
  70         else
  71                 oldsyntax(argc, &argv);
  72
  73         /* figure out the data block size */
  74         for (blocksize = 0, tfs = fshead; tfs; tfs = tfs->nextfs) {
  75                 tfs->bcnt = size(tfs);
  76                 if (blocksize < tfs->bcnt)
  77                         blocksize = tfs->bcnt;
  78         }
  79         /* rewrite the rules, do syntax checking */
  80         for (tfs = fshead; tfs; tfs = tfs->nextfs)
  81                 rewrite(tfs);
  82
  83         (void)next(argv);
  84         display();
  85         exit(exitval);
  86 }