mirror of
https://github.com/foxcpp/maddy.git
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82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
//go:build linux
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// +build linux
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/*
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Maddy Mail Server - Composable all-in-one email server.
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Copyright © 2019-2020 Max Mazurov <fox.cpp@disroot.org>, Maddy Mail Server contributors
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package clitools
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// Copied from github.com/foxcpp/ttyprompt
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// Commit 087a574, terminal/termios.go
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import (
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"errors"
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"os"
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"syscall"
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"unsafe"
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)
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type Termios struct {
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Iflag uint32
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Oflag uint32
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Cflag uint32
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Lflag uint32
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Cc [20]byte
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Ispeed uint32
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Ospeed uint32
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}
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/*
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TurnOnRawIO sets flags suitable for raw I/O (no echo, per-character input, etc)
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and returns original flags.
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*/
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func TurnOnRawIO(tty *os.File) (orig Termios, err error) {
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termios, err := TcGetAttr(tty.Fd())
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if err != nil {
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return Termios{}, errors.New("TurnOnRawIO: failed to get flags: " + err.Error())
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}
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termiosOrig := *termios
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termios.Lflag &^= syscall.ECHO
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termios.Lflag &^= syscall.ICANON
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termios.Iflag &^= syscall.IXON
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termios.Lflag &^= syscall.ISIG
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termios.Iflag |= syscall.IUTF8
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err = TcSetAttr(tty.Fd(), termios)
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if err != nil {
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return Termios{}, errors.New("TurnOnRawIO: flags to set flags: " + err.Error())
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}
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return termiosOrig, nil
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}
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func TcSetAttr(fd uintptr, termios *Termios) error {
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_, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, syscall.TCSETS, uintptr(unsafe.Pointer(termios)))
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if err != 0 {
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return err
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}
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return nil
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}
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func TcGetAttr(fd uintptr) (*Termios, error) {
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termios := &Termios{}
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_, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, syscall.TCGETS, uintptr(unsafe.Pointer(termios)))
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if err != 0 {
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return nil, err
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}
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return termios, nil
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}
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