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