X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/b817bfc642225b8c3c0b6a7e42d1fb949b61a606..298182ad446aaced14dea7ed0e7c968946787288:/noise.c

diff --git a/noise.c b/noise.c
index 0244869..c122506 100644
--- a/noise.c
+++ b/noise.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: noise.c,v 1.8 2004/04/08 01:36:15 mdw Exp $
+ * $Id$
  *
  * Acquisition of environmental noise (Unix-specific)
  *
@@ -390,7 +390,8 @@ int noise_freewheel(rand_pool *r)
 
 done:
   signal(SIGALRM, sigal);
-  TV_SUB(&oitv.it_value, &oitv.it_value, &itv.it_value);
+  if (oitv.it_value.tv_sec || oitv.it_value.tv_usec)
+    TV_SUB(&oitv.it_value, &oitv.it_value, &itv.it_value);
   setitimer(ITIMER_REAL, &oitv, 0);
   return (rc);
 }
@@ -423,6 +424,7 @@ int noise_enquire(rand_pool *r)
   } tab[] = {
     { "ps alxww || ps -elf",	16 },
     { "netstat -n",		 6 },
+    { "ifconfig -a",		 8 },
     { "df",			20 },
     { "w",			 6 },
     { "ls -align /tmp/.",	10 },