// +build darwin freebsd openbsd netbsd dragonfly

// +build !appengine

package isatty

import (

	"syscall"

	"unsafe"

)

const ioctlReadTermios = syscall.TIOCGETA

// IsTerminal return true if the file descriptor is terminal.

func IsTerminal(fd uintptr) bool {

	var termios syscall.Termios

	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)

	return err == 0

}