From c0c14ebf239d23c250ef97f382879d72a70a0be8 Mon Sep 17 00:00:00 2001
From: Justin Cormack <justin.cormack@docker.com>
Date: Tue, 26 Jan 2016 11:24:10 +0000
Subject: [PATCH] add pidfile support to hupper

Signed-off-by: Justin Cormack <justin.cormack@docker.com>
---
 alpine/packages/hupper/etc/init.d/hupper |  4 ++--
 alpine/packages/hupper/main.go           | 14 ++++++++++----
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/alpine/packages/hupper/etc/init.d/hupper b/alpine/packages/hupper/etc/init.d/hupper
index 3057983de..72dd59cf7 100755
--- a/alpine/packages/hupper/etc/init.d/hupper
+++ b/alpine/packages/hupper/etc/init.d/hupper
@@ -14,7 +14,7 @@ start()
 
 	ebegin "Starting docker config update manager"
 
-	[ -n "${PIDFILE}" ] || PIDFILE=/var/run/hupper.pid
+	[ -n "${PIDFILE}" ] || PIDFILE=/run/hupper.pid
 
 	start-stop-daemon --start --quiet \
 		--background \
@@ -31,7 +31,7 @@ stop()
 
 	ebegin "Stopping docker config update manager"
 
-	[ -n "${PIDFILE}" ] || PIDFILE=/var/run/hupper.pid
+	[ -n "${PIDFILE}" ] || PIDFILE=/run/hupper.pid
 
 	start-stop-daemon --stop --quiet --pidfile ${PIDFILE}
 
diff --git a/alpine/packages/hupper/main.go b/alpine/packages/hupper/main.go
index 5a9febbf9..b30c4a9e3 100644
--- a/alpine/packages/hupper/main.go
+++ b/alpine/packages/hupper/main.go
@@ -10,19 +10,25 @@ import (
 )
 
 var (
-	path    string
-	pidfile string
+	path       string
+	huppidfile string
+	pidfile    string
 )
 
 func init() {
 	flag.StringVar(&path, "path", "/Database/branch/master/watch/com.docker.driver.amd64-linux.node/etc.node/docker.node/daemon.json.node/tree.live", "path of the file to watch")
-	flag.StringVar(&pidfile, "pidfile", "/run/docker.pid", "pidfile for process to signal")
+	flag.StringVar(&huppidfile, "huppidfile", "/run/docker.pid", "pidfile for process to signal")
+	flag.StringVar(&pidfile, "pidfile", "/run/hupper.pid", "my pidfile")
 }
 
 func main() {
 	log.SetFlags(0)
 	flag.Parse()
 
+	pid := os.Getpid()
+	pidbytes := []byte(strconv.Itoa(pid))
+	_ = ioutil.WriteFile(pidfile, pidbytes, 0644)
+
 	watch, err := os.Open(path)
 	if err != nil {
 		log.Fatalln("Failed to open file", path, err)
@@ -37,7 +43,7 @@ func main() {
 		if n == 0 {
 			continue
 		}
-		bytes, err := ioutil.ReadFile(pidfile)
+		bytes, err := ioutil.ReadFile(huppidfile)
 		if err != nil {
 			continue
 		}