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Diffstat (limited to 'libpod/shutdown')
-rw-r--r--libpod/shutdown/handler.go10
1 files changed, 10 insertions, 0 deletions
diff --git a/libpod/shutdown/handler.go b/libpod/shutdown/handler.go
index f0f228b19..ac1d33910 100644
--- a/libpod/shutdown/handler.go
+++ b/libpod/shutdown/handler.go
@@ -18,6 +18,8 @@ var (
stopped bool
sigChan chan os.Signal
cancelChan chan bool
+ // Syncronize accesses to the map
+ handlerLock sync.Mutex
// Definitions of all on-shutdown handlers
handlers map[string]func(os.Signal) error
// Ordering that on-shutdown handlers will be invoked.
@@ -50,6 +52,7 @@ func Start() error {
case sig := <-sigChan:
logrus.Infof("Received shutdown signal %v, terminating!", sig)
shutdownInhibit.Lock()
+ handlerLock.Lock()
for _, name := range handlerOrder {
handler, ok := handlers[name]
if !ok {
@@ -61,6 +64,7 @@ func Start() error {
logrus.Errorf("Error running shutdown handler %s: %v", name, err)
}
}
+ handlerLock.Unlock()
shutdownInhibit.Unlock()
return
}
@@ -97,6 +101,9 @@ func Uninhibit() {
// by a signal. Handlers are invoked LIFO - the last handler registered is the
// first run.
func Register(name string, handler func(os.Signal) error) error {
+ handlerLock.Lock()
+ defer handlerLock.Unlock()
+
if handlers == nil {
handlers = make(map[string]func(os.Signal) error)
}
@@ -113,6 +120,9 @@ func Register(name string, handler func(os.Signal) error) error {
// Unregister un-registers a given shutdown handler.
func Unregister(name string) error {
+ handlerLock.Lock()
+ defer handlerLock.Unlock()
+
if handlers == nil {
return nil
}