# HG changeset patch
# User "Paul Sokolovsky <pfalcon@users.sourceforge.net>"
# Date 1196333272 -7200
# Node ID 4ec785864bbe896eda3b933e65a5f2d71864b9b3
# Parent  375f9e4a30d3de9852b00cd1decb259f4f04446e
Implement an IM [Unix-]signal-based visibility protocol, as supported
by xkbd. By receiving SISUSR1, IM implementation toggles its visibility.
The most valuable, default action for SIGUSR1 is process termination, so
we can send SIGUSR1 unconditionally, replacing old method of sending
SIGTERM (and there's also check for process existence before sending
signal, so if process is dead, it will be just restarted).

diff -r 375f9e4a30d3 -r 4ec785864bbe mbinputmgr.c
--- a/mbinputmgr.c	Wed Nov 28 03:41:20 2007 +0200
+++ b/mbinputmgr.c	Thu Nov 29 12:47:52 2007 +0200
@@ -1,3 +1,4 @@
+#include <signal.h>
 #include "mbinputmgr.h"
 
 static void 
@@ -233,8 +234,10 @@ mbinputmgr_toggle_selected_method (MBInp
   if ( (inpmgr->PidCurrent != -1) /* Something running */
        &&  (kill(inpmgr->PidCurrent, 0) != -1) )
     {
-      kill(inpmgr->PidCurrent, 15); /* kill it */
-      inpmgr->PidCurrent = -1;
+      /* Send a SIGUSR1. Smart IMs will toggle their visibility.
+         Dumb, which don't handle it at all, will just die
+	 per default action for SIGUSR1, termination. */
+      kill(inpmgr->PidCurrent, SIGUSR1);
     }
   else fork_exec(inpmgr, inpmgr->MethodSelected->exec);
 }