syscall_unix.go

// Copyright 2010 Jonas mg
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.


// +build !plan9,!windows

/* Reference: man termios ; man tty_ioctl */
package terminal

import (
	"syscall"
	"unsafe"
)

//sys	int tcgetattr(int fd, struct termios *termios_p)

func tcgetattr(fd int, state *termios) (err error) {
	_, _, e1 := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd),
		uintptr(_TCGETS), uintptr(unsafe.Pointer(state)))
	if e1 != 0 {
		err = e1
	}
	return
}

//sys	int tcsetattr(int fd, int optional_actions, const struct termios *termios_p)

func tcsetattr(fd int, action uint, state *termios) (err error) {
	switch action {
	case _TCSANOW:
		action = _TCSETS
	case _TCSADRAIN:
		action = _TCSETSW
	case _TCSAFLUSH:
		action = _TCSETSF
	}

	_, _, e1 := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd),
		uintptr(action), uintptr(unsafe.Pointer(state)))
	if e1 != 0 {
		err = e1
	}
	return
}

// getWinsize gets the winsize struct with the terminal size set by the kernel.
func getWinsize(fd int, ws *winsize) (err error) {
	_, _, e1 := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd),
		uintptr(_TIOCGWINSZ), uintptr(unsafe.Pointer(ws)))
	if e1 != 0 {
		err = e1
	}
	return
}