From 82737beff97256e26a40cd9cee9c1d3f3e5ac4fa Mon Sep 17 00:00:00 2001
From: "Frank Ch. Eigler" <fche@elastic.org>
Date: Thu, 17 Jul 2008 14:54:30 -0400
Subject: PR6030: control signal relay and accept deferred re-reception

---
 main.cxx | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

(limited to 'main.cxx')

diff --git a/main.cxx b/main.cxx
index c6c5f479..8c99cf7e 100644
--- a/main.cxx
+++ b/main.cxx
@@ -260,11 +260,16 @@ printscript(systemtap_session& s, ostream& o)
 int pending_interrupts;
 
 extern "C"
-void handle_interrupt (int sig) 
+void handle_interrupt (int sig)
 {
+  if (pending_interrupts == 0)
+    kill (0, sig); // Forward signals to child processes if any.
+
   pending_interrupts ++;
-  kill (0, sig); // forward signals to child processes if any
-  if (pending_interrupts > 1) // XXX: should be configurable? time-based?
+  // NB: the "2" below is intended to skip the effect of the self-induced
+  // deferred signal coming from the kill() above.
+
+  if (pending_interrupts > 2) // XXX: should be configurable? time-based?
     {
       char msg[] = "Too many interrupts received, exiting.\n";
       int rc = write (2, msg, sizeof(msg)-1);
-- 
cgit