Add GetProcess method to expose the underlying os.Process

rsync.go

@@ -232,8 +232,17 @@ func (r Rsync) Run() error {
 	return r.cmd.Wait()
 }
 
-func (r Rsync) Cmd() *exec.Cmd {
-	return r.cmd
+// GetProcess return the underlying os process.
+//
+// The caller can use this method to get information of the process or send signals
+// to the rsync process like killing it.
+//
+// The caller should call this method only after Run is called.
+func (r Rsync) GetProcess() *os.Process {
+	if r.cmd != nil {
+		return r.cmd.Process
+	}
+	return nil
 }
 
 // NewRsync returns task with described options

task.go

@@ -5,7 +5,7 @@ import (
 	"bytes"
 	"io"
 	"math"
-	"os/exec"
+	"os"
 	"strconv"
 	"strings"
 	"sync"
@@ -80,8 +80,13 @@ func (t *Task) Run() error {
 	return err
 }
 
-func (r Task) Cmd() *exec.Cmd {
-	return r.rsync.cmd
+func (r *Task) GetProcess() *os.Process {
+	if r.rsync != nil {
+		if r.rsync.cmd != nil {
+			return r.rsync.cmd.Process
+		}
+	}
+	return nil
 }
 
 // NewTask returns new rsync task