Added SIGUSR1/SIGUSR2 handling.

Sending nmbd/smbd a SIGUSR1 will raise the debug level by one (capped at 10)
sending a SIGUSR2 will lower it (lower limit at zero).
Jeremy.
(This used to be commit 6a3cb6f4b46129e4d799a24d34cdb9460ed8910f)

2 files changed, 37 insertions, 3 deletions

diff --git a/source3/nmbd/nmbd.c b/source3/nmbd/nmbd.c
index da98fbfde3..744942ba46 100644
--- a/source3/nmbd/nmbd.c
+++ b/source3/nmbd/nmbd.c
@@ -75,11 +75,11 @@ static int sig_term()
   announce_my_servers_removed();
 
   exit(0);
+
   /* Keep compiler happy.. */
   return 0;
 } /* sig_term */
 
-
 /**************************************************************************** **
  catch a sighup
  **************************************************************************** */
@@ -577,6 +577,17 @@ int main(int argc,char *argv[])
   signal( SIGHUP,  SIGNAL_CAST sig_hup );
   signal( SIGTERM, SIGNAL_CAST sig_term );
 
+  /* Setup the signals that allow the debug log level
+     to by dynamically changed. */
+
+#if defined(SIGUSR1)
+  signal( SIGUSR1, SIGNAL_CAST sig_usr1 );
+#endif /* SIGUSR1 */
+
+#if defined(SIGUSR2)
+  signal( SIGUSR2, SIGNAL_CAST sig_usr2 );
+#endif /* SIGUSR2 */
+
   while((opt = getopt(argc, argv, "as:T:I:C:bAi:B:N:Rn:l:d:Dp:hSH:G:f:")) != EOF)
     {
       switch (opt)
@@ -755,8 +766,14 @@ int main(int argc,char *argv[])
     exit(1);
   }
 
-  /* We can only take sigterm signals in the select. */
+  /* We can only take signals in the select. */
   BlockSignals( True, SIGTERM );
+#if defined(SIGUSR1)
+  BlockSignals( True, SIGUSR1);
+#endif /* SIGUSR1 */
+#if defined(SIGUSR2)
+  BlockSignals( True, SIGUSR2);
+#endif /* SIGUSR2 */
 
   process();
   close_sockets();
diff --git a/source3/nmbd/nmbd_packets.c b/source3/nmbd/nmbd_packets.c
index 4fb0543967..03bd3889fa 100644
--- a/source3/nmbd/nmbd_packets.c
+++ b/source3/nmbd/nmbd_packets.c
@@ -1650,10 +1650,27 @@ BOOL listen_for_packets(BOOL run_election)
   timeout.tv_sec = (run_election||num_response_packets) ? 1 : NMBD_SELECT_LOOP;
   timeout.tv_usec = 0;
 
-  /* We can only take term signals when we are in the select. */
+  /* Prepare for the select - allow certain signals. */
+
   BlockSignals(False, SIGTERM);
+#if defined(SIGUSR1)
+  BlockSignals(False, SIGUSR1);
+#endif /* SIGUSR1 */
+#if defined(SIGUSR2)
+  BlockSignals(False, SIGUSR2);
+#endif /* SIGUSR2 */
+
   selrtn = sys_select(&fds,&timeout);
+
+  /* We can only take signals when we are in the select - block them again here. */
+
   BlockSignals(True, SIGTERM);
+#if defined(SIGUSR1)
+  BlockSignals(True, SIGUSR1);
+#endif /* SIGUSR1 */
+#if defined(SIGUSR2)
+  BlockSignals(True, SIGUSR2);
+#endif /* SIGUSR2 */
 
   if(selrtn > 0)
   {