1 /* $OpenBSD: hexdump.c,v 1.20 2016/02/08 21:05:51 mmcc Exp $ */
2 /* $NetBSD: hexdump.c,v 1.7 1997/10/19 02:34:06 lukem Exp $ */
3
4 /*
5 * Copyright (c) 1989, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <err.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <unistd.h>
37 #include <string.h>
38 #include "hexdump.h"
39
40 #define MINIMUM(a, b) (((a) < (b)) ? (a) : (b))
41
42 FS *fshead; /* head of format strings */
43 int blocksize; /* data block size */
44 int exitval; /* final exit value */
45 long length = -1; /* max bytes to read */
46 char *iobuf; /* stdio I/O buffer */
47 size_t iobufsiz; /* size of stdio I/O buffer */
48
49 int
main(int argc,char * argv[])50 main(int argc, char *argv[])
51 {
52 FS *tfs;
53 char *p;
54
55 if (pledge("stdio rpath", NULL) == -1)
56 err(1, "pledge");
57
58 if (!(p = strrchr(argv[0], 'o')) || strcmp(p, "od"))
59 newsyntax(argc, &argv);
60 else
61 oldsyntax(argc, &argv);
62
63 /* figure out the data block size */
64 for (blocksize = 0, tfs = fshead; tfs; tfs = tfs->nextfs) {
65 tfs->bcnt = size(tfs);
66 if (blocksize < tfs->bcnt)
67 blocksize = tfs->bcnt;
68 }
69 if (length != -1) {
70 iobufsiz = MINIMUM(length, blocksize);
71 if ((iobuf = malloc(iobufsiz)) == NULL)
72 err(1, NULL);
73 }
74 /* rewrite the rules, do syntax checking */
75 for (tfs = fshead; tfs; tfs = tfs->nextfs)
76 rewrite(tfs);
77
78 (void)next(argv);
79 display();
80 exit(exitval);
81 }
82