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Annotation of embedaddon/sudo/common/zero_bytes.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (c) 2003-2005, 2007, 2010
                      3:  *     Todd C. Miller <Todd.Miller@courtesan.com>
                      4:  *
                      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.
                     16:  */
                     17: 
                     18: #include <config.h>
                     19: 
                     20: #include <sys/types.h>
                     21: 
                     22: #include "missing.h"
                     23: 
                     24: /*
                     25:  * Like bzero(3) but with a volatile pointer.  The hope is that
                     26:  * the compiler will not be able to optimize away this function.
                     27:  */
                     28: void
                     29: zero_bytes(volatile void *v, 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: }