/
run_unix.go
53 lines (43 loc) · 1.16 KB
/
run_unix.go
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//go:build linux || darwin
package command
import (
"io"
"log"
"os"
"os/exec"
"os/signal"
"syscall"
"github.com/creack/pty"
"golang.org/x/term"
)
func run(path string, args []string) error {
c := exec.Command(path, args...)
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
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. 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
}