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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package testpty
import (
"internal/syscall/unix"
"os"
"syscall"
)
func open() (pty *os.File, processTTY string, err error) {
m, err := unix.PosixOpenpt(syscall.O_RDWR)
if err != nil {
return nil, "", ptyError("posix_openpt", err)
}
if err := unix.Grantpt(m); err != nil {
syscall.Close(m)
return nil, "", ptyError("grantpt", err)
}
if err := unix.Unlockpt(m); err != nil {
syscall.Close(m)
return nil, "", ptyError("unlockpt", err)
}
processTTY, err = unix.Ptsname(m)
if err != nil {
syscall.Close(m)
return nil, "", ptyError("ptsname", err)
}
return os.NewFile(uintptr(m), "pty"), processTTY, nil
}