split stdout and stderr in run if not -t

commands.go

@@ -1016,29 +1016,32 @@ func (cli *DockerCli) CmdAttach(args ...string) error {
 	if err != nil {
 		return err
 	}
+
+	splitStderr := container.Config.Tty
+
 	connections := 1
-	if !container.Config.Tty {
+	if splitStderr {
 		connections += 1
 	}
-	c := make(chan error, 2)
+	chErrors := make(chan error, connections)
 	cli.monitorTtySize(cmd.Arg(0))
-	if !container.Config.Tty {
+	if splitStderr {
 		go func() {
-			c <- cli.hijack("POST", "/containers/"+cmd.Arg(0)+"/attach?stream=1&stderr=1", false, nil, os.Stderr)
+			chErrors <- cli.hijack("POST", "/containers/"+cmd.Arg(0)+"/attach?stream=1&stderr=1", false, nil, os.Stderr)
 		}()
 	}
 	v := url.Values{}
 	v.Set("stream", "1")
 	v.Set("stdin", "1")
 	v.Set("stdout", "1")
-	if container.Config.Tty {
+	if !splitStderr {
 		v.Set("stderr", "1")
 	}
 	go func() {
-		c <- cli.hijack("POST", "/containers/"+cmd.Arg(0)+"/attach?"+v.Encode(), container.Config.Tty, os.Stdin, os.Stdout)
+		chErrors <- cli.hijack("POST", "/containers/"+cmd.Arg(0)+"/attach?"+v.Encode(), container.Config.Tty, os.Stdin, os.Stdout)
 	}()
 	for connections > 0 {
-		err := <-c
+		err := <-chErrors
 		if err != nil {
 			return err
 		}
@@ -1206,11 +1209,13 @@ func (cli *DockerCli) CmdRun(args ...string) error {
 		fmt.Fprintln(os.Stderr, "WARNING: ", warning)
 	}
 
+	splitStderr := !config.Tty
+
 	connections := 0
-	if config.AttachStdin || config.AttachStdout {
+	if config.AttachStdin || config.AttachStdout || (!splitStderr && config.AttachStderr) {
 		connections += 1
 	}
-	if !config.Tty && config.AttachStderr {
+	if splitStderr && config.AttachStderr {
 		connections += 1
 	}
 
@@ -1221,12 +1226,12 @@ func (cli *DockerCli) CmdRun(args ...string) error {
 	}
 
 	if connections > 0 {
-		c := make(chan error, connections)
+		chErrors := make(chan error, connections)
 		cli.monitorTtySize(out.Id)
 
-		if !config.Tty && config.AttachStderr {
+		if splitStderr && config.AttachStderr {
 			go func() {
-				c <- cli.hijack("POST", "/containers/"+out.Id+"/attach?logs=1&stream=1&stderr=1", config.Tty, nil, os.Stderr)
+				chErrors <- cli.hijack("POST", "/containers/"+out.Id+"/attach?logs=1&stream=1&stderr=1", config.Tty, nil, os.Stderr)
 			}()
 		}
 
@@ -1240,14 +1245,14 @@ func (cli *DockerCli) CmdRun(args ...string) error {
 		if config.AttachStdout {
 			v.Set("stdout", "1")
 		}
-		if config.Tty && config.AttachStderr {
+		if !splitStderr && config.AttachStderr {
 			v.Set("stderr", "1")
 		}
 		go func() {
-			c <- cli.hijack("POST", "/containers/"+out.Id+"/attach?"+v.Encode(), config.Tty, os.Stdin, os.Stdout)
+			chErrors <- cli.hijack("POST", "/containers/"+out.Id+"/attach?"+v.Encode(), config.Tty, os.Stdin, os.Stdout)
 		}()
 		for connections > 0 {
-			err := <-c
+			err := <-chErrors
 			if err != nil {
 				return err
 			}