mirror of https://github.com/docker/cli.git
146 lines
5.0 KiB
Go
146 lines
5.0 KiB
Go
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package client
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import (
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"syscall"
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"unsafe"
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)
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type Termios struct {
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Iflag uintptr
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Oflag uintptr
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Cflag uintptr
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Lflag uintptr
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Cc [20]byte
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Ispeed uintptr
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Ospeed uintptr
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}
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const (
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// Input flags
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inpck = 0x010
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istrip = 0x020
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icrnl = 0x100
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ixon = 0x200
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// Output flags
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opost = 0x1
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// Control flags
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cs8 = 0x300
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// Local flags
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icanon = 0x100
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iexten = 0x400
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)
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const (
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HUPCL = 0x4000
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ICANON = 0x100
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ICRNL = 0x100
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IEXTEN = 0x400
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BRKINT = 0x2
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CFLUSH = 0xf
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CLOCAL = 0x8000
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CREAD = 0x800
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CS5 = 0x0
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CS6 = 0x100
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CS7 = 0x200
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CS8 = 0x300
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CSIZE = 0x300
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CSTART = 0x11
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CSTATUS = 0x14
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CSTOP = 0x13
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CSTOPB = 0x400
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CSUSP = 0x1a
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IGNBRK = 0x1
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IGNCR = 0x80
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IGNPAR = 0x4
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IMAXBEL = 0x2000
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INLCR = 0x40
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INPCK = 0x10
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ISIG = 0x80
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ISTRIP = 0x20
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IUTF8 = 0x4000
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IXANY = 0x800
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IXOFF = 0x400
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IXON = 0x200
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NOFLSH = 0x80000000
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OCRNL = 0x10
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OFDEL = 0x20000
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OFILL = 0x80
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ONLCR = 0x2
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ONLRET = 0x40
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ONOCR = 0x20
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ONOEOT = 0x8
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OPOST = 0x1
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RENB = 0x1000
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PARMRK = 0x8
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PARODD = 0x2000
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TOSTOP = 0x400000
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VDISCARD = 0xf
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VDSUSP = 0xb
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VEOF = 0x0
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VEOL = 0x1
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VEOL2 = 0x2
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VERASE = 0x3
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VINTR = 0x8
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VKILL = 0x5
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VLNEXT = 0xe
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VMIN = 0x10
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VQUIT = 0x9
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VREPRINT = 0x6
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VSTART = 0xc
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VSTATUS = 0x12
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VSTOP = 0xd
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VSUSP = 0xa
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VT0 = 0x0
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VT1 = 0x10000
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VTDLY = 0x10000
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VTIME = 0x11
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ECHO = 0x00000008
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PENDIN = 0x20000000
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)
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type State struct {
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termios Termios
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}
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// IsTerminal returns true if the given file descriptor is a terminal.
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func IsTerminal(fd int) bool {
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var termios Termios
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_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), uintptr(getTermios), uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
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return err == 0
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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 int) (*State, error) {
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var oldState State
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if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), uintptr(getTermios), uintptr(unsafe.Pointer(&oldState.termios)), 0, 0, 0); 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 | ICRNL | IGNCR | IXON | IXOFF
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newState.Lflag &^= ECHO | ICANON | ISIG
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if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), uintptr(setTermios), uintptr(unsafe.Pointer(&newState)), 0, 0, 0); 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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// Restore restores the terminal connected to the given file descriptor to a
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// previous state.
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func Restore(fd int, state *State) error {
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_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), uintptr(setTermios), uintptr(unsafe.Pointer(&state.termios)), 0, 0, 0)
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return err
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}
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