| package term |
| |
| import ( |
| "syscall" |
| "unsafe" |
| ) |
| |
| const ( |
| getTermios = syscall.TIOCGETA |
| setTermios = syscall.TIOCSETA |
| ) |
| |
| // Termios magic numbers, passthrough to the ones defined in syscall. |
| const ( |
| IGNBRK = syscall.IGNBRK |
| PARMRK = syscall.PARMRK |
| INLCR = syscall.INLCR |
| IGNCR = syscall.IGNCR |
| ECHONL = syscall.ECHONL |
| CSIZE = syscall.CSIZE |
| ICRNL = syscall.ICRNL |
| ISTRIP = syscall.ISTRIP |
| PARENB = syscall.PARENB |
| ECHO = syscall.ECHO |
| ICANON = syscall.ICANON |
| ISIG = syscall.ISIG |
| IXON = syscall.IXON |
| BRKINT = syscall.BRKINT |
| INPCK = syscall.INPCK |
| OPOST = syscall.OPOST |
| CS8 = syscall.CS8 |
| IEXTEN = syscall.IEXTEN |
| ) |
| |
| // Termios is the Unix API for terminal I/O. |
| type Termios struct { |
| Iflag uint64 |
| Oflag uint64 |
| Cflag uint64 |
| Lflag uint64 |
| Cc [20]byte |
| Ispeed uint64 |
| Ospeed uint64 |
| } |
| |
| // MakeRaw put the terminal connected to the given file descriptor into raw |
| // mode and returns the previous state of the terminal so that it can be |
| // restored. |
| func MakeRaw(fd uintptr) (*State, error) { |
| var oldState State |
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, uintptr(getTermios), uintptr(unsafe.Pointer(&oldState.termios))); err != 0 { |
| return nil, err |
| } |
| |
| newState := oldState.termios |
| newState.Iflag &^= (IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON) |
| newState.Oflag &^= OPOST |
| newState.Lflag &^= (ECHO | ECHONL | ICANON | ISIG | IEXTEN) |
| newState.Cflag &^= (CSIZE | PARENB) |
| newState.Cflag |= CS8 |
| newState.Cc[syscall.VMIN] = 1 |
| newState.Cc[syscall.VTIME] = 0 |
| |
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, uintptr(setTermios), uintptr(unsafe.Pointer(&newState))); err != 0 { |
| return nil, err |
| } |
| |
| return &oldState, nil |
| } |