From 4709683bf2dc8d106504a9314a958f0724685d94 Mon Sep 17 00:00:00 2001
From: Stewart X Addison <sxa@uk.ibm.com>
Date: Fri, 30 Dec 2016 12:44:46 +0000
Subject: [PATCH] build: don't squash signal handlers with --shared

Fixes: https://github.com/nodejs/node/issues/10520
Ref: https://github.com/nodejs/node/commit/dd47a8c78547db14ea0c7fc2f3375e8c9cb1a129

An application using node built as a shared library may legitimately
implement its own signal handling routines. Current behaviour is
to squash all signal handlers on node startup. This change will
stop that behaviour when node is built as a shared library.
---
 src/node.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/node.cc b/src/node.cc
index da4e1d4b0e4cd9..0b3db98b5e3819 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -2192,7 +2192,7 @@ static void WaitForInspectorDisconnect(Environment* env) {
   if (env->inspector_agent()->IsConnected()) {
     // Restore signal dispositions, the app is done and is no longer
     // capable of handling signals.
-#ifdef __POSIX__
+#if defined(__POSIX__) && !defined(NODE_SHARED_MODE)
     struct sigaction act;
     memset(&act, 0, sizeof(act));
     for (unsigned nr = 1; nr < kMaxSignal; nr += 1) {
@@ -4093,6 +4093,7 @@ inline void PlatformInit() {
 
   CHECK_EQ(err, 0);
 
+#ifndef NODE_SHARED_MODE
   // Restore signal dispositions, the parent process may have changed them.
   struct sigaction act;
   memset(&act, 0, sizeof(act));
@@ -4106,6 +4107,7 @@ inline void PlatformInit() {
     act.sa_handler = (nr == SIGPIPE) ? SIG_IGN : SIG_DFL;
     CHECK_EQ(0, sigaction(nr, &act, nullptr));
   }
+#endif  // !NODE_SHARED_MODE
 
   RegisterSignalHandler(SIGINT, SignalExit, true);
   RegisterSignalHandler(SIGTERM, SignalExit, true);