svn commit: r299708 - head/usr.sbin/timed/timed

[Pedro F. Giffuni]

Author: pfg
Date: Sat May 14 01:12:23 2016
New Revision: 299708
URL: https://svnweb.freebsd.org/changeset/base/299708

Log:
  timed(8): Use stronger random number generator.
  
  Using arc4random simplifies the code by not having to worry about
  seeds which ironically depend on the time.
  
  CID:	1300004

Modified:
  head/usr.sbin/timed/timed/timed.c

Modified: head/usr.sbin/timed/timed/timed.c
==============================================================================
--- head/usr.sbin/timed/timed/timed.c	Sat May 14 00:46:38 2016	(r299707)
+++ head/usr.sbin/timed/timed/timed.c	Sat May 14 01:12:23 2016	(r299708)
@@ -229,12 +229,9 @@ main(int argc, char *argv[])
 		exit(1);
 	}
 
-	/* choose a unique seed for random number generation */
-	(void)gettimeofday(&ntime, NULL);
-	srandom(ntime.tv_sec + ntime.tv_usec);
-
-	sequence = random();     /* initial seq number */
+	sequence = arc4random();     /* initial seq number */
 
+	(void)gettimeofday(&ntime, NULL);
 	/* rounds kernel variable time to multiple of 5 ms. */
 	ntime.tv_sec = 0;
 	ntime.tv_usec = -((ntime.tv_usec/1000) % 5) * 1000;