Run systemd commands with --user flag (#310)

When controlling a user service with systemd supply the --user flag

.gitignore

@@ -0,0 +1 @@
+.vscode/

service_systemd_linux.go

@@ -90,7 +90,7 @@ func (s *systemd) unitName() string {
 }
 
 func (s *systemd) getSystemdVersion() int64 {
-	_, out, err := runWithOutput("systemctl", "--version")
+	_, out, err := s.runWithOutput("systemctl", "--version")
 	if err != nil {
 		return -1
 	}
@@ -234,7 +234,7 @@ func (s *systemd) Run() (err error) {
 }
 
 func (s *systemd) Status() (Status, error) {
-	exitCode, out, err := runWithOutput("systemctl", "is-active", s.unitName())
+	exitCode, out, err := s.runWithOutput("systemctl", "is-active", s.unitName())
 	if exitCode == 0 && err != nil {
 		return StatusUnknown, err
 	}
@@ -244,7 +244,7 @@ func (s *systemd) Status() (Status, error) {
 		return StatusRunning, nil
 	case strings.HasPrefix(out, "inactive"):
 		// inactive can also mean its not installed, check unit files
-		exitCode, out, err := runWithOutput("systemctl", "list-unit-files", "-t", "service", s.unitName())
+		exitCode, out, err := s.runWithOutput("systemctl", "list-unit-files", "-t", "service", s.unitName())
 		if exitCode == 0 && err != nil {
 			return StatusUnknown, err
 		}
@@ -275,6 +275,13 @@ func (s *systemd) Restart() error {
 	return s.runAction("restart")
 }
 
+func (s *systemd) runWithOutput(command string, arguments ...string) (int, string, error) {
+	if s.isUserService() {
+		arguments = append(arguments, "--user")
+	}
+	return runWithOutput(command, arguments...)
+}
+
 func (s *systemd) run(action string, args ...string) error {
 	if s.isUserService() {
 		return run("systemctl", append([]string{action, "--user"}, args...)...)