test: Bump up runc to 9f9c96235cc97674e935002fc3d78361b696a69e

This brings in a fix for a cgroups setup race condition
that we hit sometimes in the tests.

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

vendor/github.com/opencontainers/runc/libcontainer/console_linux.go

@@ -1,71 +1,14 @@
 package libcontainer
 
 import (
-	"fmt"
 	"os"
-	"unsafe"
 
 	"golang.org/x/sys/unix"
 )
 
-func ConsoleFromFile(f *os.File) Console {
-	return &linuxConsole{
-		master: f,
-	}
-}
-
-// newConsole returns an initialized console that can be used within a container by copying bytes
-// from the master side to the slave that is attached as the tty for the container's init process.
-func newConsole() (Console, error) {
-	master, err := os.OpenFile("/dev/ptmx", unix.O_RDWR|unix.O_NOCTTY|unix.O_CLOEXEC, 0)
-	if err != nil {
-		return nil, err
-	}
-	console, err := ptsname(master)
-	if err != nil {
-		return nil, err
-	}
-	if err := unlockpt(master); err != nil {
-		return nil, err
-	}
-	return &linuxConsole{
-		slavePath: console,
-		master:    master,
-	}, nil
-}
-
-// linuxConsole is a linux pseudo TTY for use within a container.
-type linuxConsole struct {
-	master    *os.File
-	slavePath string
-}
-
-func (c *linuxConsole) File() *os.File {
-	return c.master
-}
-
-func (c *linuxConsole) Path() string {
-	return c.slavePath
-}
-
-func (c *linuxConsole) Read(b []byte) (int, error) {
-	return c.master.Read(b)
-}
-
-func (c *linuxConsole) Write(b []byte) (int, error) {
-	return c.master.Write(b)
-}
-
-func (c *linuxConsole) Close() error {
-	if m := c.master; m != nil {
-		return m.Close()
-	}
-	return nil
-}
-
 // mount initializes the console inside the rootfs mounting with the specified mount label
 // and applying the correct ownership of the console.
-func (c *linuxConsole) mount() error {
+func mountConsole(slavePath string) error {
 	oldMask := unix.Umask(0000)
 	defer unix.Umask(oldMask)
 	f, err := os.Create("/dev/console")
@@ -75,17 +18,20 @@ func (c *linuxConsole) mount() error {
 	if f != nil {
 		f.Close()
 	}
-	return unix.Mount(c.slavePath, "/dev/console", "bind", unix.MS_BIND, "")
+	return unix.Mount(slavePath, "/dev/console", "bind", unix.MS_BIND, "")
 }
 
 // dupStdio opens the slavePath for the console and dups the fds to the current
 // processes stdio, fd 0,1,2.
-func (c *linuxConsole) dupStdio() error {
-	slave, err := c.open(unix.O_RDWR)
+func dupStdio(slavePath string) error {
+	fd, err := unix.Open(slavePath, unix.O_RDWR, 0)
 	if err != nil {
-		return err
+		return &os.PathError{
+			Op:   "open",
+			Path: slavePath,
+			Err:  err,
+		}
 	}
-	fd := int(slave.Fd())
 	for _, i := range []int{0, 1, 2} {
 		if err := unix.Dup3(fd, i, 0); err != nil {
 			return err
@@ -93,60 +39,3 @@ func (c *linuxConsole) dupStdio() error {
 	}
 	return nil
 }
-
-// open is a clone of os.OpenFile without the O_CLOEXEC used to open the pty slave.
-func (c *linuxConsole) open(flag int) (*os.File, error) {
-	r, e := unix.Open(c.slavePath, flag, 0)
-	if e != nil {
-		return nil, &os.PathError{
-			Op:   "open",
-			Path: c.slavePath,
-			Err:  e,
-		}
-	}
-	return os.NewFile(uintptr(r), c.slavePath), nil
-}
-
-func ioctl(fd uintptr, flag, data uintptr) error {
-	if _, _, err := unix.Syscall(unix.SYS_IOCTL, fd, flag, data); err != 0 {
-		return err
-	}
-	return nil
-}
-
-// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
-// unlockpt should be called before opening the slave side of a pty.
-func unlockpt(f *os.File) error {
-	var u int32
-	return ioctl(f.Fd(), unix.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
-}
-
-// ptsname retrieves the name of the first available pts for the given master.
-func ptsname(f *os.File) (string, error) {
-	n, err := unix.IoctlGetInt(int(f.Fd()), unix.TIOCGPTN)
-	if err != nil {
-		return "", err
-	}
-	return fmt.Sprintf("/dev/pts/%d", n), nil
-}
-
-// SaneTerminal 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 SaneTerminal(terminal *os.File) error {
-	termios, err := unix.IoctlGetTermios(int(terminal.Fd()), unix.TCGETS)
-	if err != nil {
-		return fmt.Errorf("ioctl(tty, tcgets): %s", err.Error())
-	}
-
-	// Set -onlcr so we don't have to deal with \r.
-	termios.Oflag &^= unix.ONLCR
-
-	if err := unix.IoctlSetTermios(int(terminal.Fd()), unix.TCSETS, termios); err != nil {
-		return fmt.Errorf("ioctl(tty, tcsets): %s", err.Error())
-	}
-
-	return nil
-}