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/*-
* Copyright (c) 2006 Verdens Gang AS
* Copyright (c) 2006-2007 Linpro AS
* All rights reserved.
*
* Author: Dag-Erling Smørgrav <des@linpro.no>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: srandomdev.c 1818 2007-08-09 12:12:12Z des $
*/
#ifndef HAVE_SRANDOMDEV
#include <sys/time.h>
#include <fcntl.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include "compat/srandomdev.h"
void
srandomdev(void)
{
struct timeval tv;
unsigned int seed;
int fd;
if ((fd = open("/dev/random", O_RDONLY)) >= 0) {
read(fd, &seed, sizeof seed);
close(fd);
} else {
gettimeofday(&tv, NULL);
/* NOTE: intentional use of uninitialized variable */
seed ^= (getpid() << 16) ^ tv.tv_sec ^ tv.tv_usec;
}
srandom(seed);
}
#endif
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