Package expect provides an expect-like interface to automate control of applications. It is unlike expect in that it does not spawn or manage process lifecycle. This package only focuses on expecting output and sending input through it's pseudoterminal.
package main
import (
"log"
"os"
"os/exec"
"time"
"github.com/twpayne/go-expect"
)
func main() {
c, err := expect.NewConsole(expect.WithStdout(os.Stdout))
if err != nil {
log.Fatal(err)
}
defer c.Close()
cmd := exec.Command("vi")
cmd.Stdin = c.Tty()
cmd.Stdout = c.Tty()
cmd.Stderr = c.Tty()
go func() {
c.ExpectEOF()
}()
err = cmd.Start()
if err != nil {
log.Fatal(err)
}
time.Sleep(time.Second)
c.Send("iHello world\x1b")
time.Sleep(time.Second)
c.Send("dd")
time.Sleep(time.Second)
c.SendLine(":q!")
err = cmd.Wait()
if err != nil {
log.Fatal(err)
}
}package main
import (
"fmt"
"golang.org/x/crypto/ssh/terminal"
"github.com/twpayne/go-expect"
)
func getPassword(fd int) string {
bytePassword, _ := terminal.ReadPassword(fd)
return string(bytePassword)
}
func main() {
c, _ := expect.NewConsole()
defer c.Close()
donec := make(chan struct{})
go func() {
defer close(donec)
c.SendLine("hunter2")
}()
echoText := getPassword(int(c.Tty().Fd()))
<-donec
fmt.Printf("\nPassword from stdin: %s", echoText)
}