Annotation of src/usr.bin/sudo/zero_bytes.c, Revision 1.3
1.1 millert 1: /*
1.3 ! millert 2: * Copyright (c) 2003-2005 Todd C. Miller <Todd.Miller@courtesan.com>
1.1 millert 3: *
1.2 millert 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.
1.1 millert 15: */
16:
17: #include <sys/types.h>
18:
1.3 ! millert 19: #include <config.h>
! 20: #include <compat.h>
1.1 millert 21:
22: #ifndef lint
1.3 ! millert 23: __unused static const char rcsid[] = "$Sudo: zero_bytes.c,v 1.2.2.2 2007/06/12 01:28:42 millert Exp $";
1.1 millert 24: #endif /* lint */
25:
26: /*
27: * Like bzero(3) but with a volatile pointer. The hope is that
28: * the compiler will not be able to optimize away this function.
29: */
30: void
31: zero_bytes(v, n)
32: volatile VOID *v;
33: size_t n;
34: {
35: volatile char *p, *ep;
36:
37: for (p = v, ep = p + n; p < ep; p++)
38: *p = 0;
39: return;
40: }