Run cleanup handlers in main function

cmd/restic/cleanup.go

@@ -13,6 +13,7 @@ import (
 var cleanupHandlers struct {
 	sync.Mutex
 	list []func() error
+	done bool
 }
 
 var stderr = os.Stderr
@@ -39,6 +40,11 @@ func RunCleanupHandlers() {
 	cleanupHandlers.Lock()
 	defer cleanupHandlers.Unlock()
 
+	if cleanupHandlers.done {
+		return
+	}
+	cleanupHandlers.done = true
+
 	for _, f := range cleanupHandlers.list {
 		err := f()
 		if err != nil {

cmd/restic/main.go

@@ -32,6 +32,8 @@ func main() {
 		fmt.Fprintf(os.Stderr, "\nthe `unlock` command can be used to remove stale locks\n")
 	}
 
+	RunCleanupHandlers()
+
 	if err != nil {
 		os.Exit(1)
 	}