mirror of
https://github.com/servalproject/serval-dna.git
synced 2024-12-30 09:58:55 +00:00
86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
/*
|
|
Serval Distributed Numbering Architecture (DNA)
|
|
Copyright (C) 2010 Paul Gardner-Stephen
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
/*-
|
|
* Copyright (c) 2006 Verdens Gang AS
|
|
* Copyright (c) 2006-2008 Linpro AS
|
|
* All rights reserved.
|
|
*
|
|
* Author: Dag-Erling SmÃ\u017ergrav <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.
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#ifndef HAVE_SRANDOMDEV
|
|
|
|
#ifndef WIN32
|
|
#include <sys/time.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include "mphlr.h"
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
|
|
void
|
|
srandomdev(void)
|
|
{
|
|
struct timeval tv;
|
|
unsigned int seed;
|
|
#ifndef WIN32
|
|
FILE *fd;
|
|
|
|
fd = fopen("/dev/urandom", "r");
|
|
if (fd >= 0) {
|
|
fread(&seed, sizeof seed, 1, fd);
|
|
fclose(fd);
|
|
} else
|
|
#endif
|
|
{
|
|
|
|
gettimeofday(&tv, NULL);
|
|
/* NOTE: intentional use of uninitialized variable */
|
|
seed ^= (getpid() << 16) ^ tv.tv_sec ^ tv.tv_usec;
|
|
}
|
|
srandom(seed);
|
|
}
|
|
#endif
|