Add console pkg and update go-runc

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

vendor/github.com/crosbymichael/console/console_linux.go

@@ -0,0 +1,105 @@
+package console
+
+// #include <termios.h>
+import "C"
+
+import (
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+// 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", syscall.O_RDWR|syscall.O_NOCTTY|syscall.O_CLOEXEC, 0)
+	if err != nil {
+		return nil, "", err
+	}
+	if err := saneTerminal(f); err != nil {
+		return nil, "", err
+	}
+	slave, err := ptsname(f)
+	if err != nil {
+		return nil, "", err
+	}
+	if err := unlockpt(f); err != nil {
+		return nil, "", err
+	}
+	return &master{
+		f: f,
+	}, slave, nil
+}
+
+type master struct {
+	f       *os.File
+	termios *syscall.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 ioctl(
+		m.f.Fd(),
+		uintptr(syscall.TIOCSWINSZ),
+		uintptr(unsafe.Pointer(&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.termios == nil {
+		return nil
+	}
+	return tcset(m.f.Fd(), m.termios)
+}
+
+func (m *master) SetRaw() error {
+	m.termios = &syscall.Termios{}
+	if err := tcget(m.f.Fd(), m.termios); err != nil {
+		return err
+	}
+	rawState := *m.termios
+	C.cfmakeraw((*C.struct_termios)(unsafe.Pointer(&rawState)))
+	rawState.Oflag = rawState.Oflag | C.OPOST
+	return tcset(m.f.Fd(), &rawState)
+}
+
+func (m *master) Size() (WinSize, error) {
+	var ws WinSize
+	if err := ioctl(
+		m.f.Fd(),
+		uintptr(syscall.TIOCGWINSZ),
+		uintptr(unsafe.Pointer(&ws)),
+	); err != nil {
+		return ws, err
+	}
+	return ws, nil
+}
+
+// checkConsole checks if the provided file is a console
+func checkConsole(f *os.File) error {
+	var termios syscall.Termios
+	if tcget(f.Fd(), &termios) != nil {
+		return ErrNotAConsole
+	}
+	return nil
+}