// Based on ssh/terminal: // Copyright 2011 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. //go:build (linux && !appengine) || darwin || freebsd || openbsd // +build linux,!appengine darwin freebsd openbsd package term import ( "io" "syscall" "unsafe" ) // IsTerminal returns true if w writes to a terminal. func IsTerminal(w io.Writer) bool { fw, ok := w.(fder) if !ok { return false } var termios syscall.Termios _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fw.Fd(), ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0) return err == 0 }