agent/proxy: fix build on Windows

agent/proxy/daemon.go

@@ -8,7 +8,6 @@ import (
 	"reflect"
 	"strconv"
 	"sync"
-	"syscall"
 	"time"
 
 	"github.com/hashicorp/consul/lib/file"
@@ -255,9 +254,9 @@ func (p *Daemon) start() (*os.Process, error) {
 		cmd.Args = []string{cmd.Path}
 	}
 
-	// Start it in a new sessions (and hence process group) so that killing agent
-	// (even with Ctrl-C) won't kill proxy.
-	cmd.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
+	// Perform system-specific setup. In particular, Unix-like systems
+	// shuld set sid so that killing the agent doesn't kill the daemon.
+	configureDaemon(&cmd)
 
 	// Start it
 	p.Logger.Printf("[DEBUG] agent/proxy: starting proxy: %q %#v", cmd.Path, cmd.Args[1:])

agent/proxy/process_unix.go

@@ -5,6 +5,7 @@ package proxy
 import (
 	"fmt"
 	"os"
+	"os/exec"
 	"syscall"
 )
 
@@ -28,3 +29,10 @@ func findProcess(pid int) (*os.Process, error) {
 
 	return nil, fmt.Errorf("process %d is dead or running as another user", pid)
 }
+
+// configureDaemon is called prior to Start to allow system-specific setup.
+func configureDaemon(cmd *exec.Cmd) {
+	// Start it in a new sessions (and hence process group) so that killing agent
+	// (even with Ctrl-C) won't kill proxy.
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
+}

agent/proxy/process_windows.go

@@ -4,6 +4,7 @@ package proxy
 
 import (
 	"os"
+	"os/exec"
 )
 
 func findProcess(pid int) (*os.Process, error) {
@@ -12,3 +13,7 @@ func findProcess(pid int) (*os.Process, error) {
 	// non-nil means it seems to be healthy.
 	return os.FindProcess(pid)
 }
+
+func configureDaemon(cmd *exec.Cmd) {
+	// Do nothing
+}