1 files changed, 142 insertions, 0 deletions
diff --git a/vendor/github.com/containerd/console/console_unix.go b/vendor/github.com/containerd/console/console_unix.go
new file mode 100644
index 000000000..118c8c3ab
--- /dev/null
+++ b/vendor/github.com/containerd/console/console_unix.go
@@ -0,0 +1,142 @@
+// +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)
+}