usr/src/lib/libc/port/gen/freezero.c

   1 /*
   2  * Copyright (c) 2008, 2010, 2011, 2016 Otto Moerbeek <otto@drijf.net>
   3  * Copyright (c) 2012 Matthew Dempsky <matthew@openbsd.org>
   4  * Copyright (c) 2008 Damien Miller <djm@openbsd.org>
   5  * Copyright (c) 2000 Poul-Henning Kamp <phk@FreeBSD.org>
   6  *
   7  * Permission to use, copy, modify, and distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 #include <string.h>
  21 #include <stdlib.h>
  22
  23 void
  24 freezero(void *ptr, size_t sz)
  25 {
  26         /* This is legal. */
  27         if (ptr == NULL)
  28                 return;
  29
  30         explicit_bzero(ptr, sz);
  31         free(ptr);
  32 }