From d8a6c0a91bb06ff09a98630601c2fc76f86bd121 Mon Sep 17 00:00:00 2001
From: ridiculousfish <corydoras@ridiculousfish.com>
Date: Sat, 21 Jan 2017 14:07:54 -0800
Subject: [PATCH] Add a SIGALRM handler that does nothing

This will be part of a future signal torture-test, to ensure
we are handling EINTR correctly
---
 src/signal.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/signal.cpp b/src/signal.cpp
index 64a7c80af..aa76e8d33 100644
--- a/src/signal.cpp
+++ b/src/signal.cpp
@@ -242,6 +242,15 @@ static void handle_chld(int sig, siginfo_t *info, void *context) {
     default_handler(sig, info, context);
 }
 
+// We have a sigalarm handler that does nothing
+// This is used in the signal torture test, to verify
+// that we behave correctly when receiving lots of irrelevant signals
+static void handle_sigalarm(int sig, siginfo_t *info, void *context) {
+    UNUSED(sig);
+    UNUSED(info);
+    UNUSED(context);
+}
+
 void signal_reset_handlers() {
     int i;
 
@@ -285,6 +294,11 @@ static void set_interactive_handlers() {
     act.sa_flags = SA_SIGINFO;
     sigaction(SIGHUP, &act, 0);
 
+    // SIGALARM as part of our signal torture test
+    act.sa_sigaction = &handle_sigalarm;
+    act.sa_flags = SA_SIGINFO;
+    sigaction(SIGALRM, &act, 0);
+
 #ifdef SIGWINCH
     act.sa_sigaction = &handle_winch;
     act.sa_flags = SA_SIGINFO;