45 lines
1.2 KiB
Go
45 lines
1.2 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.TCGETS
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setTermios = syscall.TCSETS
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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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// 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, 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 &^= (syscall.IGNBRK | syscall.BRKINT | syscall.PARMRK | syscall.ISTRIP | syscall.INLCR | syscall.IGNCR | syscall.ICRNL | syscall.IXON)
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newState.Oflag &^= syscall.OPOST
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newState.Lflag &^= (syscall.ECHO | syscall.ECHONL | syscall.ICANON | syscall.ISIG | syscall.IEXTEN)
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newState.Cflag &^= (syscall.CSIZE | syscall.PARENB)
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newState.Cflag |= syscall.CS8
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if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, 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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