Go Pty

Go-Pty is a package for using pseudo-terminal interfaces in Go. It supports Unix PTYs and Windows through ConPty.

Why can't we just use os/exec?

Windows requires updating the process running in the PTY with a special attribute to enable ConPty support. This is not possible with os/exec see go#62708 and go#6271. On Unix, pty.Cmd is just a wrapper around os/exec.Cmd that sets up the PTY.

Usage

go get github.com/aymanbagabas/go-pty

Example running grep

package main

import (
	"io"
	"log"
	"os"

	"github.com/aymanbagabas/go-pty"
)

func main() {
	pty, err := pty.New()
	if err != nil {
		log.Fatalf("failed to open pty: %s", err)
	}

	defer pty.Close()
	c := pty.Command("grep", "--color=auto", "bar")
	if err := c.Start(); err != nil {
		log.Fatalf("failed to start: %s", err)
	}

	go func() {
		pty.Write([]byte("foo\n"))
		pty.Write([]byte("bar\n"))
		pty.Write([]byte("baz\n"))
		pty.Write([]byte{4}) // EOT
	}()
	go io.Copy(os.Stdout, pty)

	if err := c.Wait(); err != nil {
		panic(err)
	}
}

Refer to ./examples for more examples.

Credits

• creack/pty: support for Unix PTYs
• microsoft/hcsshim: Windows ConPty implementation

License

This project is licensed under the MIT License - see the LICENSE for details.