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Annotation of src/usr.bin/sudo/zero_bytes.c, Revision 1.6

1.6     ! krw         1: /*     $OpenBSD$       */
1.1       millert     2: /*
1.4       millert     3:  * Copyright (c) 2003-2005, 2007 Todd C. Miller <Todd.Miller@courtesan.com>
1.1       millert     4:  *
1.2       millert     5:  * Permission to use, copy, modify, and distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
                      8:  *
                      9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       millert    16:  */
                     17:
                     18: #include <sys/types.h>
                     19:
1.3       millert    20: #include <config.h>
                     21: #include <compat.h>
1.1       millert    22:
                     23: /*
                     24:  * Like bzero(3) but with a volatile pointer.  The hope is that
                     25:  * the compiler will not be able to optimize away this function.
                     26:  */
                     27: void
                     28: zero_bytes(v, n)
1.4       millert    29:     volatile void *v;
1.1       millert    30:     size_t n;
                     31: {
                     32:     volatile char *p, *ep;
                     33:
                     34:     for (p = v, ep = p + n; p < ep; p++)
                     35:        *p = 0;
                     36:     return;
                     37: }