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package main
import (
"io"
"os"
"os/exec"
"os/signal"
"syscall"
"github.com/creack/pty"
"golang.org/x/term"
)
func test() error {
// Create arbitrary command.
c := exec.Command("bash")
// Start the command with a pty.
ptmx, err := pty.Start(c)
if err != nil {
return err
}
// Make sure to close the pty at the end.
defer func() { _ = ptmx.Close() }() // Best effort.
// Handle pty size.
ch := make(chan os.Signal, 1)
signal.Notify(ch, syscall.SIGWINCH)
go func() {
for range ch {
if err := pty.InheritSize(os.Stdin, ptmx); err != nil {
log("error resizing pty: %s", err)
}
}
}()
ch <- syscall.SIGWINCH // Initial resize.
defer func() { signal.Stop(ch); close(ch) }() // Cleanup signals when done.
// Set stdin in raw mode.
oldState, err := term.MakeRaw(int(os.Stdin.Fd()))
if err != nil {
panic(err)
}
defer func() { _ = term.Restore(int(os.Stdin.Fd()), oldState) }() // Best effort.
// Copy stdin to the pty and the pty to stdout.
// NOTE: The goroutine will keep reading until the next keystroke before returning.
go func() { _, _ = io.Copy(ptmx, os.Stdin) }()
_, _ = io.Copy(os.Stdout, ptmx)
return nil
}
func mainBash() {
if err := test(); err != nil {
log(logError, "exit in mainBash()")
exit(err)
}
}
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