xref: /freebsd/usr.bin/hexdump/hexdump.c (revision 0b3105a37d7adcadcb720112fed4dc4e8040be99)
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  * 4. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 #ifndef lint
31 static const char copyright[] =
32 "@(#) Copyright (c) 1989, 1993\n\
33 	The Regents of the University of California.  All rights reserved.\n";
34 #endif /* not lint */
35 
36 #ifndef lint
37 #if 0
38 static char sccsid[] = "@(#)hexdump.c	8.1 (Berkeley) 6/6/93";
39 #endif
40 #endif /* not lint */
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
43 
44 #include <sys/types.h>
45 #include <locale.h>
46 #include <stdlib.h>
47 #include <stdio.h>
48 #include <string.h>
49 #include "hexdump.h"
50 
51 FS *fshead;				/* head of format strings */
52 int blocksize;				/* data block size */
53 int exitval;				/* final exit value */
54 int length = -1;			/* max bytes to read */
55 
56 int
57 main(int argc, char *argv[])
58 {
59 	FS *tfs;
60 	char *p;
61 
62 	(void)setlocale(LC_ALL, "");
63 
64 	if (!(p = strrchr(argv[0], 'o')) || strcmp(p, "od"))
65 		newsyntax(argc, &argv);
66 	else
67 		oldsyntax(argc, &argv);
68 
69 	/* figure out the data block size */
70 	for (blocksize = 0, tfs = fshead; tfs; tfs = tfs->nextfs) {
71 		tfs->bcnt = size(tfs);
72 		if (blocksize < tfs->bcnt)
73 			blocksize = tfs->bcnt;
74 	}
75 	/* rewrite the rules, do syntax checking */
76 	for (tfs = fshead; tfs; tfs = tfs->nextfs)
77 		rewrite(tfs);
78 
79 	(void)next(argv);
80 	display();
81 	exit(exitval);
82 }
83