mirror of
https://github.com/token2/snapd.git
synced 2026-03-13 11:15:47 -07:00
49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
// -*- Mode: Go; indent-tabs-mode: t -*-
|
|
|
|
/*
|
|
* Copyright (C) 2014-2015 Canonical Ltd
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 3 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
package osutil
|
|
|
|
import (
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
// Winsize is from tty_ioctl(4)
|
|
type Winsize struct {
|
|
Row uint16
|
|
Col uint16
|
|
xpixel uint16 // unused
|
|
Ypixel uint16 // unused
|
|
}
|
|
|
|
// GetTermWinsize performs the TIOCGWINSZ ioctl on stdout
|
|
func GetTermWinsize() (*Winsize, error) {
|
|
ws := &Winsize{}
|
|
x, _, errno := syscall.Syscall(syscall.SYS_IOCTL, uintptr(syscall.Stdout), uintptr(syscall.TIOCGWINSZ), uintptr(unsafe.Pointer(ws)))
|
|
|
|
if int(x) == -1 {
|
|
// returning ws on error lets people that don't care
|
|
// about the error get on with querying the struct
|
|
// (which will be empty on error).
|
|
return ws, errno
|
|
}
|
|
|
|
return ws, nil
|
|
}
|