service: add Config.Executable field to allow service to control other binaries.

service.go

@@ -64,6 +64,9 @@ package service // import "github.com/kardianos/service"
 import (
 	"errors"
 	"fmt"
+	"path/filepath"
+
+	"github.com/kardianos/osext"
 )
 
 // Config provides the setup for a Service. The Name field is required.
@@ -76,6 +79,9 @@ type Config struct {
 	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.
 	ChRoot           string
 	UserService      bool // Install as a current user service.
@@ -84,6 +90,13 @@ type Config struct {
 	Option KeyValue
 }
 
+func (c *Config) execPath() (string, error) {
+	if len(c.Executable) != 0 {
+		return filepath.Abs(c.Executable)
+	}
+	return osext.Executable()
+}
+
 var (
 	system         System
 	systemRegistry []System

service_darwin.go

@@ -12,8 +12,6 @@ import (
 	"syscall"
 	"text/template"
 	"time"
-
-	"github.com/kardianos/osext"
 )
 
 const maxPathSize = 32 * 1024
@@ -98,7 +96,7 @@ func (s *darwinLaunchdService) Install() error {
 	}
 	defer f.Close()
 
-	path, err := osext.Executable()
+	path, err := s.execPath()
 	if err != nil {
 		return err
 	}

service_systemd_linux.go

@@ -12,8 +12,6 @@ import (
 	"syscall"
 	"text/template"
 	"time"
-
-	"github.com/kardianos/osext"
 )
 
 func isSystemd() bool {
@@ -75,7 +73,7 @@ func (s *systemd) Install() error {
 	}
 	defer f.Close()
 
-	path, err := osext.Executable()
+	path, err := s.execPath()
 	if err != nil {
 		return err
 	}

service_sysv_linux.go

@@ -12,8 +12,6 @@ import (
 	"syscall"
 	"text/template"
 	"time"
-
-	"github.com/kardianos/osext"
 )
 
 type sysv struct {
@@ -67,7 +65,7 @@ func (s *sysv) Install() error {
 	}
 	defer f.Close()
 
-	path, err := osext.Executable()
+	path, err := s.execPath()
 	if err != nil {
 		return err
 	}

service_upstart_linux.go

@@ -8,12 +8,10 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"os/exec"
 	"os/signal"
-	"syscall"
 	"text/template"
 	"time"
-
-	"github.com/kardianos/osext"
 )
 
 func isUpstart() bool {
@@ -77,7 +75,7 @@ func (s *upstart) Install() error {
 	}
 	defer f.Close()
 
-	path, err := osext.Executable()
+	path, err := s.execPath()
 	if err != nil {
 		return err
 	}
@@ -122,7 +120,7 @@ func (s *upstart) Run() (err error) {
 
 	sigChan := make(chan os.Signal, 3)
 
-	signal.Notify(sigChan, syscall.SIGTERM, os.Interrupt)
+	signal.Notify(sigChan, os.Interrupt, os.Kill)
 
 	<-sigChan
 
@@ -130,11 +128,11 @@ func (s *upstart) Run() (err error) {
 }
 
 func (s *upstart) Start() error {
-	return run("initctl", "start", s.Name)
+	return exec.Command("initctl", "start", s.Name).Run()
 }
 
 func (s *upstart) Stop() error {
-	return run("initctl", "stop", s.Name)
+	return exec.Command("initctl", "stop", s.Name).Run()
 }
 
 func (s *upstart) Restart() error {

service_windows.go

@@ -16,7 +16,6 @@ import (
 	"code.google.com/p/winsvc/eventlog"
 	"code.google.com/p/winsvc/mgr"
 	"code.google.com/p/winsvc/svc"
-	"github.com/kardianos/osext"
 )
 
 const version = "Windows Service"
@@ -165,10 +164,11 @@ loop:
 }
 
 func (ws *windowsService) Install() error {
-	exepath, err := osext.Executable()
+	exepath, err := ws.execPath()
 	if err != nil {
 		return err
 	}
+
 	binPath := &bytes.Buffer{}
 	// Quote exe path in case it contains a string.
 	binPath.WriteRune('"')