pty
Pty is a Go package for using unix pseudo-terminals.
Install
go get github.com/kr/pty
Example
package main
import (
    "github.com/kr/pty"
    "io"
    "os"
    "os/exec"
)
func main() {
    c := exec.Command("grep", "--color=auto", "bar")
    f, err := pty.Start(c)
    if err != nil {
        panic(err)
    }
    go func() {
        f.Write([]byte("foo\n"))
        f.Write([]byte("bar\n"))
        f.Write([]byte("baz\n"))
        f.Write([]byte{4}) // EOT
    }()
    io.Copy(os.Stdout, f)
}