func (o *oflagSetter) Set(pty *os.File, termios *syscall.Termios, value uint32) error {
if value == 0 {
termios.Oflag &^= o.Flag
} else {
termios.Oflag |= o.Flag
}
return SetAttr(pty, termios)
}
func (s *Screen) Init() error {
var err error
ttyIn, err = os.OpenFile("/dev/tty", os.O_RDWR, 0666)
if err != nil {
return err
}
ttyOut, err = os.OpenFile("/dev/tty", os.O_RDONLY, 0666)
if err != nil {
return err
}
orig = new(syscall.Termios)
err = tcgetattr(ttyIn.Fd(), orig)
if err != nil {
return err
}
tios := new(syscall.Termios)
*tios = *orig
tios.Iflag &= ^uint32(syscall.ECHO | syscall.ICANON | syscall.IEXTEN | syscall.ISIG)
tios.Iflag &= ^uint32(syscall.BRKINT | syscall.ICRNL | syscall.ISTRIP | syscall.IXON)
tios.Cflag &= ^uint32(syscall.CSIZE | syscall.PARENB)
tios.Cflag |= syscall.CS8
tios.Oflag &= ^uint32(syscall.OPOST)
tios.Cc[syscall.VMIN] = 1
tios.Cc[syscall.VTIME] = 0
err = tcsetattr(ttyIn.Fd(), tios)
if err != nil {
return err
}
s.HideCursor()
s.Clear()
return nil
}
// Cfmakeraw modifies attr for raw mode.
func Cfmakeraw(attr *syscall.Termios) {
attr.Iflag &^= syscall.BRKINT | syscall.ICRNL | syscall.INPCK | syscall.ISTRIP | syscall.IXON
attr.Oflag &^= syscall.OPOST
attr.Cflag &^= syscall.CSIZE | syscall.PARENB
attr.Cflag |= syscall.CS8
attr.Lflag &^= syscall.ECHO | syscall.ICANON | syscall.IEXTEN | syscall.ISIG
attr.Cc[syscall.VMIN] = 1
attr.Cc[syscall.VTIME] = 0
}
func OpenSerial(device string, baud uint) (s *serial, err error) {
myBaud := getBaud(baud)
if myBaud == 0 {
err = errInvalidBaud
return
}
fd, err := syscall.Open(
device,
os.O_RDWR|syscall.O_RDWR|syscall.O_NOCTTY|syscall.O_NDELAY|syscall.O_NONBLOCK,
0666)
if err != nil {
return
}
defer func() {
if err != nil {
syscall.Close(fd)
}
}()
term := syscall.Termios{}
if err = sys.Ioctl(uintptr(fd), syscall.TCGETS, uintptr(unsafe.Pointer(&term))); err != nil {
return
}
term.Ispeed = myBaud
term.Ospeed = myBaud
term.Cflag |= (syscall.CLOCAL | syscall.CREAD)
term.Cflag = uint32(int32(term.Cflag) & ^syscall.PARENB & ^syscall.CSTOPB & ^syscall.CSIZE)
term.Cflag |= syscall.CS8
term.Lflag = uint32(int32(term.Lflag) & ^(syscall.ICANON | syscall.ECHO | syscall.ECHOE | syscall.ISIG))
term.Oflag = uint32(int32(term.Oflag) & ^syscall.OPOST)
term.Cc[syscall.VMIN] = 0
term.Cc[syscall.VTIME] = 100
if err = sys.Ioctl(uintptr(fd), syscall.TCSETS, uintptr(unsafe.Pointer(&term))); err != nil {
return
}
status := 0
if err = sys.Ioctl(uintptr(fd), syscall.TIOCMGET, uintptr(unsafe.Pointer(&status))); err != nil {
return
}
status |= syscall.TIOCM_DTR | syscall.TIOCM_RTS
if err = sys.Ioctl(uintptr(fd), syscall.TIOCMSET, uintptr(unsafe.Pointer(&status))); err != nil {
return
}
s = &serial{uintptr(fd)}
runtime.SetFinalizer(s, func(this *serial) {
this.Close()
})
return
}
func setRawMode(settings *syscall.Termios) {
// Set local mode
settings.Cflag |= termiosMask(syscall.CREAD | syscall.CLOCAL)
// Set raw mode
settings.Lflag &= ^termiosMask(syscall.ICANON | syscall.ECHO | syscall.ECHOE | syscall.ECHOK |
syscall.ECHONL | syscall.ECHOCTL | syscall.ECHOPRT | syscall.ECHOKE | syscall.ISIG | syscall.IEXTEN)
settings.Iflag &= ^termiosMask(syscall.IXON | syscall.IXOFF | syscall.IXANY | syscall.INPCK |
syscall.IGNPAR | syscall.PARMRK | syscall.ISTRIP | syscall.IGNBRK | syscall.BRKINT | syscall.INLCR |
syscall.IGNCR | syscall.ICRNL | tcIUCLC)
settings.Oflag &= ^termiosMask(syscall.OPOST)
// Block reads until at least one char is available (no timeout)
settings.Cc[syscall.VMIN] = 1
settings.Cc[syscall.VTIME] = 0
}
// saneTerminal sets the necessary tty_ioctl(4)s to ensure that a pty pair
// created by us acts normally. In particular, a not-very-well-known default of
// Linux unix98 ptys is that they have +onlcr by default. While this isn't a
// problem for terminal emulators, because we relay data from the terminal we
// also relay that funky line discipline.
func saneTerminal(terminal *os.File) error {
// Go doesn't have a wrapper for any of the termios ioctls.
var termios syscall.Termios
if err := ioctl(terminal.Fd(), syscall.TCGETS, uintptr(unsafe.Pointer(&termios))); err != nil {
return fmt.Errorf("ioctl(tty, tcgets): %s", err.Error())
}
// Set -onlcr so we don't have to deal with \r.
termios.Oflag &^= syscall.ONLCR
if err := ioctl(terminal.Fd(), syscall.TCSETS, uintptr(unsafe.Pointer(&termios))); err != nil {
return fmt.Errorf("ioctl(tty, tcsets): %s", err.Error())
}
return nil
}
func setRawMode(settings *syscall.Termios, mode *Mode) {
// Set local mode
settings.Cflag |= termiosMask(syscall.CREAD | syscall.CLOCAL)
// Set raw mode
settings.Lflag &= ^termiosMask(syscall.ICANON | syscall.ECHO | syscall.ECHOE | syscall.ECHOK |
syscall.ECHONL | syscall.ECHOCTL | syscall.ECHOPRT | syscall.ECHOKE | syscall.ISIG | syscall.IEXTEN)
settings.Iflag &= ^termiosMask(syscall.IXON | syscall.IXOFF | syscall.IXANY | syscall.INPCK |
syscall.IGNPAR | syscall.PARMRK | syscall.ISTRIP | syscall.IGNBRK | syscall.BRKINT | syscall.INLCR |
syscall.IGNCR | syscall.ICRNL | tc_IUCLC)
settings.Oflag &= ^termiosMask(syscall.OPOST)
if mode.Vmin == 0 && mode.Vtimeout == 0 {
// Switch to default mode
// Block reads until at least one char is available (no timeout)
mode.Vmin = 1
}
settings.Cc[syscall.VMIN] = mode.Vmin
settings.Cc[syscall.VTIME] = mode.Vtimeout
}