//go:build !windows
// +build !windows

package color

import (
	"os"
	"syscall"
	"unsafe"
)

const ioctlReadTermios = 0x5401

// isTerminal checks if the file is a terminal
func isTerminal(f *os.File) bool {
	fd := f.Fd()
	var termios syscall.Termios

	r1, _, errno := syscall.Syscall6(
		syscall.SYS_IOCTL,
		fd,
		ioctlReadTermios,
		uintptr(unsafe.Pointer(&termios)),
		0, 0, 0,
	)

	return r1 == 0 && errno == 0
}

// isWindowsTerminal always returns false on Unix
func isWindowsTerminal() bool {
	return false
}