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Annotation of src/usr.bin/sudo/zero_bytes.c, Revision 1.5

1.1       millert     1: /*
1.4       millert     2:  * Copyright (c) 2003-2005, 2007 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: /*
                     23:  * Like bzero(3) but with a volatile pointer.  The hope is that
                     24:  * the compiler will not be able to optimize away this function.
                     25:  */
                     26: void
                     27: zero_bytes(v, n)
1.4       millert    28:     volatile void *v;
1.1       millert    29:     size_t n;
                     30: {
                     31:     volatile char *p, *ep;
                     32:
                     33:     for (p = v, ep = p + n; p < ep; p++)
                     34:        *p = 0;
                     35:     return;
                     36: }