Default HTTP socket to the tmp directory

go/daemon/env.go

@@ -43,9 +43,11 @@ func (e EnvVars) init() error {
 
 func getDefaultHTTPSocketDirPath() string {
 	path, err := firstExistingDir(
+		"/tmp",
+
+		// TODO it's possible the daemon process can't actually write to these
 		"/run",
 		"/var/run",
-		"/tmp",
 		"/dev/shm",
 	)
 	if err != nil {