55 lines
1.1 KiB
Go
55 lines
1.1 KiB
Go
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package term
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import (
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"syscall"
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"unsafe"
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)
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const (
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getTermios = syscall.TIOCGETA
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setTermios = syscall.TIOCSETA
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ECHO = 0x00000008
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ONLCR = 0x2
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ISTRIP = 0x20
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INLCR = 0x40
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ISIG = 0x80
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IGNCR = 0x80
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ICANON = 0x100
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ICRNL = 0x100
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IXOFF = 0x400
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IXON = 0x200
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)
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type Termios struct {
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Iflag uint64
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Oflag uint64
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Cflag uint64
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Lflag uint64
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Cc [20]byte
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Ispeed uint64
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Ospeed uint64
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}
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// MakeRaw put the terminal connected to the given file descriptor into raw
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// mode and returns the previous state of the terminal so that it can be
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// restored.
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func MakeRaw(fd uintptr) (*State, error) {
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var oldState State
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if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, uintptr(getTermios), uintptr(unsafe.Pointer(&oldState.termios))); err != 0 {
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return nil, err
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}
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newState := oldState.termios
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newState.Iflag &^= (ISTRIP | INLCR | IGNCR | IXON | IXOFF)
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newState.Iflag |= ICRNL
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newState.Oflag |= ONLCR
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newState.Lflag &^= (ECHO | ICANON | ISIG)
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if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, uintptr(setTermios), uintptr(unsafe.Pointer(&newState))); err != 0 {
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return nil, err
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}
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return &oldState, nil
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}
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