mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-11-22 20:40:27 +00:00
112 lines
2.4 KiB
Go
112 lines
2.4 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package term
|
|
|
|
import (
|
|
"io"
|
|
"syscall"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
// State contains the state of a terminal.
|
|
type state struct {
|
|
termios unix.Termios
|
|
}
|
|
|
|
func isTerminal(fd int) bool {
|
|
_, err := unix.IoctlGetTermio(fd, unix.TCGETA)
|
|
return err == nil
|
|
}
|
|
|
|
func readPassword(fd int) ([]byte, error) {
|
|
// see also: http://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libast/common/uwin/getpass.c
|
|
val, err := unix.IoctlGetTermios(fd, unix.TCGETS)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
oldState := *val
|
|
|
|
newState := oldState
|
|
newState.Lflag &^= syscall.ECHO
|
|
newState.Lflag |= syscall.ICANON | syscall.ISIG
|
|
newState.Iflag |= syscall.ICRNL
|
|
err = unix.IoctlSetTermios(fd, unix.TCSETS, &newState)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
defer unix.IoctlSetTermios(fd, unix.TCSETS, &oldState)
|
|
|
|
var buf [16]byte
|
|
var ret []byte
|
|
for {
|
|
n, err := syscall.Read(fd, buf[:])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if n == 0 {
|
|
if len(ret) == 0 {
|
|
return nil, io.EOF
|
|
}
|
|
break
|
|
}
|
|
if buf[n-1] == '\n' {
|
|
n--
|
|
}
|
|
ret = append(ret, buf[:n]...)
|
|
if n < len(buf) {
|
|
break
|
|
}
|
|
}
|
|
|
|
return ret, nil
|
|
}
|
|
|
|
func makeRaw(fd int) (*State, error) {
|
|
// see http://cr.illumos.org/~webrev/andy_js/1060/
|
|
termios, err := unix.IoctlGetTermios(fd, unix.TCGETS)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
oldState := State{state{termios: *termios}}
|
|
|
|
termios.Iflag &^= unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON
|
|
termios.Oflag &^= unix.OPOST
|
|
termios.Lflag &^= unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN
|
|
termios.Cflag &^= unix.CSIZE | unix.PARENB
|
|
termios.Cflag |= unix.CS8
|
|
termios.Cc[unix.VMIN] = 1
|
|
termios.Cc[unix.VTIME] = 0
|
|
|
|
if err := unix.IoctlSetTermios(fd, unix.TCSETS, termios); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &oldState, nil
|
|
}
|
|
|
|
func restore(fd int, oldState *State) error {
|
|
return unix.IoctlSetTermios(fd, unix.TCSETS, &oldState.termios)
|
|
}
|
|
|
|
func getState(fd int) (*State, error) {
|
|
termios, err := unix.IoctlGetTermios(fd, unix.TCGETS)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &State{state{termios: *termios}}, nil
|
|
}
|
|
|
|
func getSize(fd int) (width, height int, err error) {
|
|
ws, err := unix.IoctlGetWinsize(fd, unix.TIOCGWINSZ)
|
|
if err != nil {
|
|
return 0, 0, err
|
|
}
|
|
return int(ws.Col), int(ws.Row), nil
|
|
}
|