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1499. [bug] isc_random need to be seeded better if arc4random()

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is not used.
This commit is contained in:
Mark Andrews 2003-08-05 00:08:30 +00:00
parent a3f906859d
commit 1b5a728293
2 changed files with 13 additions and 2 deletions
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3
CHANGES
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@ -1,3 +1,6 @@
1499. [bug] isc_random need to be seeded better if arc4random()
is not used.
1498. [port] bsdos: 5.x support.
1497. [placeholder]

12
lib/isc/random.c
View file

@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: random.c,v 1.17 2002/12/05 04:36:26 marka Exp $ */
/* $Id: random.c,v 1.18 2003/08/05 00:08:30 marka Exp $ */
#include <config.h>
@ -34,7 +34,15 @@ static void
initialize_rand(void)
{
#ifndef HAVE_ARC4RANDOM
srand(time(NULL));
unsigned int pid = getpid();
/*
* The low bits of pid generally change faster.
* Xor them with the high bits of time which change slowly.
*/
pid = ((pid << 16) & 0xffff0000) | ((pid >> 16) & 0xffff);
srand(time(NULL) ^ pid);
#endif
}