update buildah and c/common to latest

also includes bumps for c/storage and c/image

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

vendor/github.com/containers/buildah/chroot/pty_ptmx.go

@@ -0,0 +1,47 @@
+//go:build linux
+// +build linux
+
+package chroot
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+// Open a PTY using the /dev/ptmx device. The main advantage of using
+// this instead of posix_openpt is that it avoids cgo.
+func getPtyDescriptors() (int, int, error) {
+	// Create a pseudo-terminal -- open a copy of the master side.
+	controlFd, err := unix.Open("/dev/ptmx", os.O_RDWR, 0600)
+	if err != nil {
+		return -1, -1, fmt.Errorf("error opening PTY master using /dev/ptmx: %v", err)
+	}
+	// Set the kernel's lock to "unlocked".
+	locked := 0
+	if result, _, err := unix.Syscall(unix.SYS_IOCTL, uintptr(controlFd), unix.TIOCSPTLCK, uintptr(unsafe.Pointer(&locked))); int(result) == -1 {
+		return -1, -1, fmt.Errorf("error unlocking PTY descriptor: %v", err)
+	}
+	// Get a handle for the other end.
+	ptyFd, _, err := unix.Syscall(unix.SYS_IOCTL, uintptr(controlFd), unix.TIOCGPTPEER, unix.O_RDWR|unix.O_NOCTTY)
+	if int(ptyFd) == -1 {
+		if errno, isErrno := err.(syscall.Errno); !isErrno || (errno != syscall.EINVAL && errno != syscall.ENOTTY) {
+			return -1, -1, fmt.Errorf("error getting PTY descriptor: %v", err)
+		}
+		// EINVAL means the kernel's too old to understand TIOCGPTPEER.  Try TIOCGPTN.
+		ptyN, err := unix.IoctlGetInt(controlFd, unix.TIOCGPTN)
+		if err != nil {
+			return -1, -1, fmt.Errorf("error getting PTY number: %v", err)
+		}
+		ptyName := fmt.Sprintf("/dev/pts/%d", ptyN)
+		fd, err := unix.Open(ptyName, unix.O_RDWR|unix.O_NOCTTY, 0620)
+		if err != nil {
+			return -1, -1, fmt.Errorf("error opening PTY %q: %v", ptyName, err)
+		}
+		ptyFd = uintptr(fd)
+	}
+	return controlFd, int(ptyFd), nil
+}