--- loncom/loncnew	2003/09/15 09:24:49	1.23
+++ loncom/loncnew	2003/09/23 11:22:14	1.25
@@ -2,7 +2,7 @@
 # The LearningOnline Network with CAPA
 # lonc maintains the connections to remote computers
 #
-# $Id: loncnew,v 1.23 2003/09/15 09:24:49 foxr Exp $
+# $Id: loncnew,v 1.25 2003/09/23 11:22:14 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -45,6 +45,14 @@
 
 # Change log:
 #    $Log: loncnew,v $
+#    Revision 1.25  2003/09/23 11:22:14  foxr
+#    Tested ability to receive sigusr2  This is now logged and must be
+#    properly implemented as a re-read of hosts and re-init of appropriate
+#    children.
+#
+#    Revision 1.24  2003/09/16 09:46:42  foxr
+#    Added skeletal infrastructure to support SIGUSR2 update hosts request.
+#
 #    Revision 1.23  2003/09/15 09:24:49  foxr
 #    Add use strict and fix all the fallout from that.
 #
@@ -141,12 +149,6 @@ use LONCAPA::HashIterator;
 #
 #   Disable all signals we might receive from outside for now.
 #
-#$SIG{QUIT}  = IGNORE;
-#$SIG{HUP}   = IGNORE;
-#$SIG{USR1}  = IGNORE;
-#$SIG{INT}   = IGNORE;
-#$SIG{CHLD}  = IGNORE;
-#$SIG{__DIE__}  = IGNORE;
 
 
 # Read the httpd configuration file to get perl variables
@@ -1596,6 +1598,7 @@ $SIG{INT}  = \&Terminate;
 $SIG{TERM} = \&Terminate; 
 $SIG{HUP}  = \&Restart;
 $SIG{USR1} = \&CheckKids; 
+$SIG{USR2} = \&UpdateKids;	# LonManage update request.
 
 while(1) {
     my $deadchild = wait();
@@ -1639,6 +1642,37 @@ sub CheckKids {
 
 =pod
 
+=head1  UpdateKids
+
+parent's SIGUSR2 handler.  This handler:
+
+=item
+
+Rereads the hosts file.
+
+=item
+ 
+Kills off (via sigint) children for hosts that have disappeared.
+
+=item
+
+HUP's children for hosts that already exist (this just forces a status display
+and resets the connection retry count for that host.
+
+=item
+
+Starts new children for hosts that have been added to the hosts.tab file since
+the start of the master program and maintains them.
+
+=cut
+
+sub UpdateKids {
+    Log("INFO", "Updating connections via SIGUSR2");
+}
+
+
+=pod
+
 =head1 Restart
 
 Signal handler for HUP... all children are killed and