X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/8ad076b280659245702f943b00188589820aafeb..17c761988f30054827a9951761d93ffeeaad0cb7:/src/src/host.c

diff --git a/src/src/host.c b/src/src/host.c
index 18821035c..c45c2d77b 100644
--- a/src/src/host.c
+++ b/src/src/host.c
@@ -1,10 +1,8 @@
-/* $Cambridge: exim/src/src/host.c,v 1.29 2007/10/18 12:01:00 nm4 Exp $ */
-
 /*************************************************
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2007 */
+/* Copyright (c) University of Cambridge 1995 - 2009 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* Functions for finding hosts, either by gethostbyname(), gethostbyaddr(), or
@@ -70,6 +68,9 @@ sprintf(addr, "%d.%d.%d.%d",
 very good for the uses to which it is put. When running the regression tests,
 start with a fixed seed.
 
+If you need better, see vaguely_random_number() which is potentially stronger,
+if a crypto library is available, but might end up just calling this instead.
+
 Arguments:
   limit:    one more than the largest number required
 
@@ -79,6 +80,8 @@ Returns:    a pseudo-random number in the range 0 to limit-1
 int
 random_number(int limit)
 {
+if (limit < 1)
+  return 0;
 if (random_seed == 0)
   {
   if (running_in_test_harness) random_seed = 42; else