github.com/MerlinKodo/gvisor@v0.0.0-20231110090155-957f62ecf90e/runsc/console/pty_linux.go (about)

     1  // Copyright 2023 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  //go:build linux
    16  // +build linux
    17  
    18  package console
    19  
    20  import "golang.org/x/sys/unix"
    21  
    22  // IsPty returns true if FD is a PTY.
    23  func IsPty(fd uintptr) bool {
    24  	_, err := unix.IoctlGetTermios(int(fd), unix.TCGETS)
    25  	return err == nil
    26  }