Unblock SIGCHLD for launched processes

session-manager/src/nsmd.C

@@ -627,6 +627,13 @@ launch ( const char *executable, const char *client_id )
 
         setenv( "NSM_URL", url, 1 );
 
+        /* Ensure the launched process can receive SIGCHLD */
+        /* Unblocking SIGCHLD here does NOT unblock it for nsmd itself */
+        sigset_t mask;
+        sigemptyset( &mask );
+        sigaddset( &mask, SIGCHLD );
+        sigprocmask(SIG_UNBLOCK, &mask, NULL );
+        
         if ( -1 == execvp( executable, args ) )
         {
             WARNING( "Error starting process: %s", strerror( errno ) );