1 /*
2 * Copyright (c) 1999, 2001 Todd C. Miller <Todd.Miller@courtesan.com>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include <sys/types.h>
18
19 #include "config.h"
20
21 #ifndef lint
22 static const char rcsid[] = "$Sudo: zero_bytes.c,v 1.2 2004/02/13 21:36:44 millert Exp $";
23 #endif /* lint */
24
25 /*
26 * Like bzero(3) but with a volatile pointer. The hope is that
27 * the compiler will not be able to optimize away this function.
28 */
29 void
zero_bytes(v,n)30 zero_bytes(v, n)
31 volatile VOID *v;
32 size_t n;
33 {
34 volatile char *p, *ep;
35
36 for (p = v, ep = p + n; p < ep; p++)
37 *p = 0;
38 return;
39 }
40