service: add minor docs addition and error messages.

README.md

@@ -9,20 +9,6 @@ It also can be used to detect how a program is called, from an interactive
 terminal or from a service manager.
 
 ## TODO
-Need to test the Interactive test for the following platforms:
- * systemd system and user service
- * Launchd system and user service
-
-The following items need to be done:
- * Determine if systemd has a launchd equivalent user service.
- * Fix Interactive test for user services.
- * Document that windows doesn't have a user service.
- * Document that upstart's user service definition changes over versions. Do not support.
- * For Linux platforms and Launchd add:
-   - UserName
-   - Arguments
-   - WorkingDirectory
-   - ChRoot
- * Determine the best way to document the Config.Option values per platform.
-   - Should some of the current parameters like "ChRoot" and "WorkingDirectory" move to "Option" map?
-
+ * OS X when running as a UserService Interactive will not be accurate.
+ * Determine if UserService should remain in main configuration.
+ * Hook up Dependencies field for Linux systems and Launchd.

service.go

@@ -75,18 +75,24 @@ type Config struct {
 	DisplayName  string   // Display name, spaces allowed.
 	Description  string   // Long description of service.
 	Dependencies []string // Array of service dependencies.
-
-	UserName  string   // Run as username.
-	Arguments []string // Run with arguments.
+	UserName     string   // Run as username.
+	Arguments    []string // Run with arguments.
 
 	// Optional field to specify the executable for service.
 	// If empty the current executable is used.
-	Executable       string
-	WorkingDirectory string // Service working directory.
+	Executable string
+
+	// The following fields are not supported on Windows.
+	WorkingDirectory string // Initial working directory.
 	ChRoot           string
-	UserService      bool // Install as a current user service.
+
+	// Install as a current user service. Only supported on OS X.
+	UserService bool
 
 	// System specific options.
+	//  * OS X
+	//    - KeepAlive bool (true)
+	//    - RunAtLoad bool (false)
 	Option KeyValue
 }
 

service_upstart_linux.go

@@ -8,7 +8,6 @@ import (
 	"errors"
 	"fmt"
 	"os"
-	"os/exec"
 	"os/signal"
 	"text/template"
 	"time"
@@ -128,11 +127,11 @@ func (s *upstart) Run() (err error) {
 }
 
 func (s *upstart) Start() error {
-	return exec.Command("initctl", "start", s.Name).Run()
+	return run("initctl", "start", s.Name)
 }
 
 func (s *upstart) Stop() error {
-	return exec.Command("initctl", "stop", s.Name).Run()
+	return run("initctl", "stop", s.Name)
 }
 
 func (s *upstart) Restart() error {