diff --git a/cmd/qpty/main.go b/cmd/qpty/main.go
index e5d4078..45af680 100644
--- a/cmd/qpty/main.go
+++ b/cmd/qpty/main.go
@@ -25,27 +25,23 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	machine := qpty.New(client, containerId)
+	proc, err := qpty.New(client, containerId, &pty.Winsize{Rows: 14, Cols: 11})
 	if err != nil {
 		log.Fatal(err)
 	}
-	exec, err := machine.Exec(&pty.Winsize{Rows: 14, Cols: 11})
-	if err != nil {
-		return
-	}
 
 	go func() {
 		time.Sleep(5 * time.Second)
-		milliType(exec, []byte(cmd+"\n"), 500*time.Millisecond)
+		milliType(proc, []byte(cmd+"\n"), 500*time.Millisecond)
 	}()
 
-	err = exec.Run(shell)
+	err = proc.Run(shell)
 	if err != nil {
 		log.Fatal(err)
 	}
 }
 
-func milliType(exec *qpty.Exec, p []byte, gap time.Duration) {
+func milliType(exec *qpty.Qpty, p []byte, gap time.Duration) {
 	for _, i := range p {
 		exec.Send([]byte{i})
 		time.Sleep(gap)
diff --git a/qpty.go b/qpty.go
index 3440616..73dfd53 100644
--- a/qpty.go
+++ b/qpty.go
@@ -12,57 +12,45 @@ import (
 type Qpty struct {
 	dock      *docker.Client
 	container string
+	pty, tty  *os.File
+	ir, or    *io.PipeReader
+	iw, ow    *io.PipeWriter
 }
 
-func New(client *docker.Client, container string) *Qpty {
-	return &Qpty{
-		dock:      client,
-		container: container,
-	}
-}
-
-func (q *Qpty) Exec(size *pty.Winsize) (*Exec, error) {
-	iPty, _, err := pty.Open()
+func New(client *docker.Client, container string, size *pty.Winsize) (*Qpty, error) {
+	iPty, iTty, err := pty.Open()
 	if err != nil {
 		return nil, err
 	}
-	e := &Exec{
-		q:   q,
-		pty: iPty,
+	q := &Qpty{
+		dock:      client,
+		container: container,
+		pty:       iPty, tty: iTty,
 	}
-	if err := e.SetSize(size); err != nil {
+	if err := q.SetSize(size); err != nil {
 		return nil, err
 	}
-
-	e.ir, e.iw = io.Pipe()
-	e.or, e.ow = io.Pipe()
-
-	return e, nil
+	q.ir, q.iw = io.Pipe()
+	q.or, q.ow = io.Pipe()
+	return q, nil
 }
 
-type Exec struct {
-	q      *Qpty
-	pty    *os.File
-	ir, or *io.PipeReader
-	iw, ow *io.PipeWriter
+func (q *Qpty) Pty() *os.File {
+	return q.pty
 }
 
-func (e *Exec) Pty() *os.File {
-	return e.pty
+func (q *Qpty) SetSize(winsize *pty.Winsize) error {
+	return pty.Setsize(q.pty, winsize)
 }
 
-func (e *Exec) SetSize(winsize *pty.Winsize) error {
-	return pty.Setsize(e.pty, winsize)
+func (q *Qpty) Send(p []byte) (int, error) {
+	return q.iw.Write(p)
 }
 
-func (e *Exec) Send(p []byte) (int, error) {
-	return e.iw.Write(p)
-}
-
-func (e *Exec) Run(shell string) error {
-	execInst, err := e.q.dock.CreateExec(docker.CreateExecOptions{
+func (q *Qpty) Run(shell string) error {
+	execInst, err := q.dock.CreateExec(docker.CreateExecOptions{
 		Cmd:          []string{shell},
-		Container:    e.q.container,
+		Container:    q.container,
 		User:         "root",
 		WorkingDir:   "/",
 		Context:      context.Background(),
@@ -75,18 +63,20 @@ func (e *Exec) Run(shell string) error {
 	}
 
 	go func() {
-		_, _ = io.Copy(e.pty, e.or)
+		_, _ = io.Copy(q.tty, q.or)
 	}()
 
 	go func() {
 		r, w := io.Pipe()
-		go io.Copy(hex.NewEncoder(w), e.pty)
-		io.Copy(os.Stdout, r)
+		go func() {
+			_, _ = io.Copy(hex.NewEncoder(w), q.pty)
+		}()
+		_, _ = io.Copy(os.Stdout, r)
 	}()
 
-	return e.q.dock.StartExec(execInst.ID, docker.StartExecOptions{
-		InputStream:  e.ir,
-		OutputStream: e.ow,
+	return q.dock.StartExec(execInst.ID, docker.StartExecOptions{
+		InputStream:  q.ir,
+		OutputStream: q.ow,
 		ErrorStream:  nil,
 		Tty:          true,
 		RawTerminal:  true,