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69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
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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)
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// Termios magic numbers, passthrough to the ones defined in syscall.
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const (
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IGNBRK = syscall.IGNBRK
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PARMRK = syscall.PARMRK
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INLCR = syscall.INLCR
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IGNCR = syscall.IGNCR
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ECHONL = syscall.ECHONL
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CSIZE = syscall.CSIZE
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ICRNL = syscall.ICRNL
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ISTRIP = syscall.ISTRIP
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PARENB = syscall.PARENB
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ECHO = syscall.ECHO
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ICANON = syscall.ICANON
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ISIG = syscall.ISIG
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IXON = syscall.IXON
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BRKINT = syscall.BRKINT
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INPCK = syscall.INPCK
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OPOST = syscall.OPOST
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CS8 = syscall.CS8
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IEXTEN = syscall.IEXTEN
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)
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// Termios is the Unix API for terminal I/O.
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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, 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 &^= (IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON)
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newState.Oflag &^= OPOST
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newState.Lflag &^= (ECHO | ECHONL | ICANON | ISIG | IEXTEN)
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newState.Cflag &^= (CSIZE | PARENB)
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newState.Cflag |= CS8
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newState.Cc[syscall.VMIN] = 1
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newState.Cc[syscall.VTIME] = 0
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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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