X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/4e66da02f19648ee1be862e67ba1d1fc5549fb7f..cc3ca08f22460b15423bb88632f3a12741b19003:/noise.c

diff --git a/noise.c b/noise.c
index 8e5129b..e339317 100644
--- a/noise.c
+++ b/noise.c
@@ -1,13 +1,13 @@
 /* -*-c-*-
  *
- * $Id: noise.c,v 1.7 2004/04/02 01:03:49 mdw Exp $
+ * $Id$
  *
  * Acquisition of environmental noise (Unix-specific)
  *
  * (c) 1998 Straylight/Edgeware
  */
 
-/*----- Licensing notice --------------------------------------------------* 
+/*----- Licensing notice --------------------------------------------------*
  *
  * This file is part of Catacomb.
  *
@@ -15,45 +15,18 @@
  * it under the terms of the GNU Library General Public License as
  * published by the Free Software Foundation; either version 2 of the
  * License, or (at your option) any later version.
- * 
+ *
  * Catacomb is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU Library General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Library General Public
  * License along with Catacomb; if not, write to the Free
  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  * MA 02111-1307, USA.
  */
 
-/*----- Revision history --------------------------------------------------* 
- *
- * $Log: noise.c,v $
- * Revision 1.7  2004/04/02 01:03:49  mdw
- * Miscellaneous constification.
- *
- * Revision 1.6  2000/06/17 12:57:47  mdw
- * New free counter noise generator, for use if /dev/random is
- * unavailable.
- *
- * Revision 1.5  1999/12/22 15:57:55  mdw
- * Label system-specific parts more clearly.
- *
- * Revision 1.4  1999/12/10 23:25:15  mdw
- * Bug fix: remove old spurious fflush.
- *
- * Revision 1.3  1999/12/10 23:24:11  mdw
- * Bug fix: flush buffers before forking.
- *
- * Revision 1.2  1999/11/11 00:59:08  mdw
- * A bit of reformatting.  Initialize the uid and gid correctly.
- *
- * Revision 1.1  1999/09/03 08:41:12  mdw
- * Initial import.
- *
- */
-
 /*----- Header files ------------------------------------------------------*/
 
 #include "config.h"
@@ -138,7 +111,7 @@ static int timer(rand_pool *r, struct timeval *tv)
   unsigned long x, d, dd;
   int de, dde;
   int ret;
-  
+
   x = tv->tv_usec + MILLION * tv->tv_sec;
   d = x ^ noise_last;
   dd = d ^ noise_diff;
@@ -417,7 +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);
 }
@@ -450,6 +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 },