dovecot-2.0: lib_init(): Call srand() with a bit better seed.

[dovecot at dovecot.org]

details:   http://hg.dovecot.org/dovecot-2.0/rev/8e30a07d8dd0
changeset: 12492:8e30a07d8dd0
user:      Timo Sirainen <tss at iki.fi>
date:      Thu Dec 02 22:59:42 2010 +0000
description:
lib_init(): Call srand() with a bit better seed.

diffstat:

 src/lib/lib.c |  9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diffs (27 lines):

diff -r 6c9bc37fcf41 -r 8e30a07d8dd0 src/lib/lib.c
--- a/src/lib/lib.c	Thu Dec 02 21:42:30 2010 +0000
+++ b/src/lib/lib.c	Thu Dec 02 22:59:42 2010 +0000
@@ -6,7 +6,8 @@
 #include "process-title.h"
 
 #include <stdlib.h>
-#include <time.h>
+#include <unistd.h>
+#include <sys/time.h>
 
 size_t nearest_power(size_t num)
 {
@@ -20,8 +21,12 @@
 
 void lib_init(void)
 {
+	struct timeval tv;
+
 	/* standard way to get rand() return different values. */
-	srand((unsigned int) time(NULL));
+	if (gettimeofday(&tv, NULL) < 0)
+		i_fatal("gettimeofday(): %m");
+	srand((unsigned int) (tv.tv_sec ^ tv.tv_usec ^ getpid()));
 
 	data_stack_init();
 	hostpid_init();