From 825a2dd554bf6c27aaed0616fa6b6a2a61f06124 Mon Sep 17 00:00:00 2001
From: Aliaksandr Valialkin <valyala@gmail.com>
Date: Thu, 30 Apr 2020 02:09:27 +0300
Subject: [PATCH] lib/procutil: prevent from app termination on SIGHUP signal,
 since this signal is frequently used for config reload

---
 lib/procutil/signal.go | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/lib/procutil/signal.go b/lib/procutil/signal.go
index 850f4c3a4..8221ecb67 100644
--- a/lib/procutil/signal.go
+++ b/lib/procutil/signal.go
@@ -9,8 +9,18 @@ import (
 // WaitForSigterm waits for either SIGTERM or SIGINT
 //
 // Returns the caught signal.
+//
+// It also prevent from program termination on SIGHUP signal,
+// since this signal is frequently used for config reloading.
 func WaitForSigterm() os.Signal {
 	ch := make(chan os.Signal, 1)
-	signal.Notify(ch, os.Interrupt, syscall.SIGTERM)
-	return <-ch
+	for {
+		signal.Notify(ch, os.Interrupt, syscall.SIGTERM, syscall.SIGHUP)
+		sig := <-ch
+		if sig == syscall.SIGHUP {
+			// Prevent from the program stop on SIGHUP
+			continue
+		}
+		return sig
+	}
 }