66ff12e5f7
* vendor: bump libcontainer and docker to remove Sirupsen imports * vendor: fix bad vendoring of archive package * vendor: fix api changes to cgroups in executor * vendor: fix docker api changes * vendor: update github.com/Azure/go-ansiterm to use non capitalized logrus import
143 lines
2.9 KiB
Go
143 lines
2.9 KiB
Go
// +build darwin freebsd linux solaris
|
|
|
|
package console
|
|
|
|
import (
|
|
"os"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
// NewPty creates a new pty pair
|
|
// The master is returned as the first console and a string
|
|
// with the path to the pty slave is returned as the second
|
|
func NewPty() (Console, string, error) {
|
|
f, err := os.OpenFile("/dev/ptmx", unix.O_RDWR|unix.O_NOCTTY|unix.O_CLOEXEC, 0)
|
|
if err != nil {
|
|
return nil, "", err
|
|
}
|
|
slave, err := ptsname(f)
|
|
if err != nil {
|
|
return nil, "", err
|
|
}
|
|
if err := unlockpt(f); err != nil {
|
|
return nil, "", err
|
|
}
|
|
m, err := newMaster(f)
|
|
if err != nil {
|
|
return nil, "", err
|
|
}
|
|
return m, slave, nil
|
|
}
|
|
|
|
type master struct {
|
|
f *os.File
|
|
original *unix.Termios
|
|
}
|
|
|
|
func (m *master) Read(b []byte) (int, error) {
|
|
return m.f.Read(b)
|
|
}
|
|
|
|
func (m *master) Write(b []byte) (int, error) {
|
|
return m.f.Write(b)
|
|
}
|
|
|
|
func (m *master) Close() error {
|
|
return m.f.Close()
|
|
}
|
|
|
|
func (m *master) Resize(ws WinSize) error {
|
|
return tcswinsz(m.f.Fd(), ws)
|
|
}
|
|
|
|
func (m *master) ResizeFrom(c Console) error {
|
|
ws, err := c.Size()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return m.Resize(ws)
|
|
}
|
|
|
|
func (m *master) Reset() error {
|
|
if m.original == nil {
|
|
return nil
|
|
}
|
|
return tcset(m.f.Fd(), m.original)
|
|
}
|
|
|
|
func (m *master) getCurrent() (unix.Termios, error) {
|
|
var termios unix.Termios
|
|
if err := tcget(m.f.Fd(), &termios); err != nil {
|
|
return unix.Termios{}, err
|
|
}
|
|
return termios, nil
|
|
}
|
|
|
|
func (m *master) SetRaw() error {
|
|
rawState, err := m.getCurrent()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
rawState = cfmakeraw(rawState)
|
|
rawState.Oflag = rawState.Oflag | unix.OPOST
|
|
return tcset(m.f.Fd(), &rawState)
|
|
}
|
|
|
|
func (m *master) DisableEcho() error {
|
|
rawState, err := m.getCurrent()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
rawState.Lflag = rawState.Lflag &^ unix.ECHO
|
|
return tcset(m.f.Fd(), &rawState)
|
|
}
|
|
|
|
func (m *master) Size() (WinSize, error) {
|
|
return tcgwinsz(m.f.Fd())
|
|
}
|
|
|
|
func (m *master) Fd() uintptr {
|
|
return m.f.Fd()
|
|
}
|
|
|
|
func (m *master) Name() string {
|
|
return m.f.Name()
|
|
}
|
|
|
|
// checkConsole checks if the provided file is a console
|
|
func checkConsole(f *os.File) error {
|
|
var termios unix.Termios
|
|
if tcget(f.Fd(), &termios) != nil {
|
|
return ErrNotAConsole
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func newMaster(f *os.File) (Console, error) {
|
|
m := &master{
|
|
f: f,
|
|
}
|
|
t, err := m.getCurrent()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
m.original = &t
|
|
return m, nil
|
|
}
|
|
|
|
// ClearONLCR sets the necessary tty_ioctl(4)s to ensure that a pty pair
|
|
// created by us acts normally. In particular, a not-very-well-known default of
|
|
// Linux unix98 ptys is that they have +onlcr by default. While this isn't a
|
|
// problem for terminal emulators, because we relay data from the terminal we
|
|
// also relay that funky line discipline.
|
|
func ClearONLCR(fd uintptr) error {
|
|
return setONLCR(fd, false)
|
|
}
|
|
|
|
// SetONLCR sets the necessary tty_ioctl(4)s to ensure that a pty pair
|
|
// created by us acts as intended for a terminal emulator.
|
|
func SetONLCR(fd uintptr) error {
|
|
return setONLCR(fd, true)
|
|
}
|