github.com/sams1990/dockerrepo@v17.12.1-ce-rc2+incompatible/pkg/term/termios_bsd.go (about)

     1  // +build darwin freebsd openbsd
     2  
     3  package term
     4  
     5  import (
     6  	"unsafe"
     7  
     8  	"golang.org/x/sys/unix"
     9  )
    10  
    11  const (
    12  	getTermios = unix.TIOCGETA
    13  	setTermios = unix.TIOCSETA
    14  )
    15  
    16  // Termios is the Unix API for terminal I/O.
    17  type Termios unix.Termios
    18  
    19  // MakeRaw put the terminal connected to the given file descriptor into raw
    20  // mode and returns the previous state of the terminal so that it can be
    21  // restored.
    22  func MakeRaw(fd uintptr) (*State, error) {
    23  	var oldState State
    24  	if _, _, err := unix.Syscall(unix.SYS_IOCTL, fd, getTermios, uintptr(unsafe.Pointer(&oldState.termios))); err != 0 {
    25  		return nil, err
    26  	}
    27  
    28  	newState := oldState.termios
    29  	newState.Iflag &^= (unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON)
    30  	newState.Oflag &^= unix.OPOST
    31  	newState.Lflag &^= (unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN)
    32  	newState.Cflag &^= (unix.CSIZE | unix.PARENB)
    33  	newState.Cflag |= unix.CS8
    34  	newState.Cc[unix.VMIN] = 1
    35  	newState.Cc[unix.VTIME] = 0
    36  
    37  	if _, _, err := unix.Syscall(unix.SYS_IOCTL, fd, setTermios, uintptr(unsafe.Pointer(&newState))); err != 0 {
    38  		return nil, err
    39  	}
    40  
    41  	return &oldState, nil
    42  }