hijack.go

hijack.go

package main

import (
	"fmt"
	"io"
	"os/exec"
	"syscall"

	"github.com/creack/pty"
)

func main() {
	ptm, pty, err := pty.Open()
	if err != nil {
		panic(err)
	}

	cmd := exec.Command("asciinema", "rec", "-q", "-c", "lsof -p $$", "--overwrite", "showing")
	cmd.Stdin = pty
	cmd.Stdout = pty
	cmd.Stderr = pty
	cmd.SysProcAttr = &syscall.SysProcAttr{
		Setsid:  true,
		Setctty: true,
		Ctty:    3,
	}
	cmd.ExtraFiles = append(cmd.ExtraFiles, pty)

	fmt.Println("running")

	go func() { _, _ = io.Copy(io.Discard, ptm) }()

	err = cmd.Run()
	if err != nil {
		// _, _ = io.Copy(os.Stderr, ptm)
		panic(err)
	}

	fmt.Println("run")
}