101 lines
1.9 KiB
Markdown
101 lines
1.9 KiB
Markdown
# pty
|
|
|
|
Pty is a Go package for using unix pseudo-terminals.
|
|
|
|
## Install
|
|
|
|
go get github.com/kr/pty
|
|
|
|
## Example
|
|
|
|
### Command
|
|
|
|
```go
|
|
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)
|
|
}
|
|
```
|
|
|
|
### Shell
|
|
|
|
```go
|
|
package main
|
|
|
|
import (
|
|
"io"
|
|
"log"
|
|
"os"
|
|
"os/exec"
|
|
"os/signal"
|
|
"syscall"
|
|
|
|
"github.com/kr/pty"
|
|
"golang.org/x/crypto/ssh/terminal"
|
|
)
|
|
|
|
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.Printf("error resizing pty: %s", err)
|
|
}
|
|
}
|
|
}()
|
|
ch <- syscall.SIGWINCH // Initial resize.
|
|
|
|
// Set stdin in raw mode.
|
|
oldState, err := terminal.MakeRaw(int(os.Stdin.Fd()))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
defer func() { _ = terminal.Restore(int(os.Stdin.Fd()), oldState) }() // Best effort.
|
|
|
|
// Copy stdin to the pty and the pty to stdout.
|
|
go func() { _, _ = io.Copy(ptmx, os.Stdin) }()
|
|
_, _ = io.Copy(os.Stdout, ptmx)
|
|
|
|
return nil
|
|
}
|
|
|
|
func main() {
|
|
if err := test(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
```
|