120 lines
2.6 KiB
Go
120 lines
2.6 KiB
Go
// +build linux
|
|
|
|
// Copyright 2019 The TCell Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use file except in compliance with the License.
|
|
// You may obtain a copy of the license at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package tcell
|
|
|
|
import (
|
|
"os"
|
|
"os/signal"
|
|
"syscall"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
type termiosPrivate struct {
|
|
tio *unix.Termios
|
|
}
|
|
|
|
func (t *tScreen) termioInit() error {
|
|
var e error
|
|
var raw *unix.Termios
|
|
var tio *unix.Termios
|
|
|
|
if t.in, e = os.OpenFile("/dev/tty", os.O_RDONLY, 0); e != nil {
|
|
goto failed
|
|
}
|
|
if t.out, e = os.OpenFile("/dev/tty", os.O_WRONLY, 0); e != nil {
|
|
goto failed
|
|
}
|
|
|
|
tio, e = unix.IoctlGetTermios(int(t.out.Fd()), unix.TCGETS)
|
|
if e != nil {
|
|
goto failed
|
|
}
|
|
|
|
t.tiosp = &termiosPrivate{tio: tio}
|
|
|
|
// make a local copy, to make it raw
|
|
raw = &unix.Termios{
|
|
Cflag: tio.Cflag,
|
|
Oflag: tio.Oflag,
|
|
Iflag: tio.Iflag,
|
|
Lflag: tio.Lflag,
|
|
Cc: tio.Cc,
|
|
}
|
|
raw.Iflag &^= (unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP |
|
|
unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON)
|
|
raw.Oflag &^= unix.OPOST
|
|
raw.Lflag &^= (unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG |
|
|
unix.IEXTEN)
|
|
raw.Cflag &^= (unix.CSIZE | unix.PARENB)
|
|
raw.Cflag |= unix.CS8
|
|
|
|
// This is setup for blocking reads. In the past we attempted to
|
|
// use non-blocking reads, but now a separate input loop and timer
|
|
// copes with the problems we had on some systems (BSD/Darwin)
|
|
// where close hung forever.
|
|
raw.Cc[unix.VMIN] = 1
|
|
raw.Cc[unix.VTIME] = 0
|
|
|
|
e = unix.IoctlSetTermios(int(t.out.Fd()), unix.TCSETS, raw)
|
|
if e != nil {
|
|
goto failed
|
|
}
|
|
|
|
signal.Notify(t.sigwinch, syscall.SIGWINCH)
|
|
|
|
if w, h, e := t.getWinSize(); e == nil && w != 0 && h != 0 {
|
|
t.cells.Resize(w, h)
|
|
}
|
|
|
|
return nil
|
|
|
|
failed:
|
|
if t.in != nil {
|
|
t.in.Close()
|
|
}
|
|
if t.out != nil {
|
|
t.out.Close()
|
|
}
|
|
return e
|
|
}
|
|
|
|
func (t *tScreen) termioFini() {
|
|
|
|
signal.Stop(t.sigwinch)
|
|
|
|
<-t.indoneq
|
|
|
|
if t.out != nil && t.tiosp != nil {
|
|
unix.IoctlSetTermios(int(t.out.Fd()), unix.TCSETSF, t.tiosp.tio)
|
|
t.out.Close()
|
|
}
|
|
|
|
if t.in != nil {
|
|
t.in.Close()
|
|
}
|
|
}
|
|
|
|
func (t *tScreen) getWinSize() (int, int, error) {
|
|
|
|
wsz, err := unix.IoctlGetWinsize(int(t.out.Fd()), unix.TIOCGWINSZ)
|
|
if err != nil {
|
|
return -1, -1, err
|
|
}
|
|
return int(wsz.Col), int(wsz.Row), nil
|
|
}
|