Change escaping rules of executable paths to cope with older versions of systemd

service_linux.go

@@ -69,4 +69,7 @@ var tf = map[string]interface{}{
 	"cmd": func(s string) string {
 		return `"` + strings.Replace(s, `"`, `\"`, -1) + `"`
 	},
+	"cmdEscape": func(s string) string {
+		return strings.Replace(s, " ", `\x20`, -1)
+	},
 }

service_systemd_linux.go

@@ -157,12 +157,12 @@ func (s *systemd) Restart() error {
 
 const systemdScript = `[Unit]
 Description={{.Description}}
-ConditionFileIsExecutable={{.Path|cmd}}
+ConditionFileIsExecutable={{.Path|cmdEscape}}
 
 [Service]
 StartLimitInterval=5
 StartLimitBurst=10
-ExecStart={{.Path|cmd}}{{range .Arguments}} {{.|cmd}}{{end}}
+ExecStart={{.Path|cmdEscape}}{{range .Arguments}} {{.|cmd}}{{end}}
 {{if .ChRoot}}RootDirectory={{.ChRoot|cmd}}{{end}}
 {{if .WorkingDirectory}}WorkingDirectory={{.WorkingDirectory|cmd}}{{end}}
 {{if .UserName}}User={{.UserName}}{{end}}