Vendor in containers/buildah 1.16.1

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

vendor/github.com/containers/buildah/copier/syscall_unix.go

@@ -0,0 +1,79 @@
+// +build !windows
+
+package copier
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+var canChroot = true
+
+func chroot(root string) (bool, error) {
+	if canChroot {
+		if err := os.Chdir(root); err != nil {
+			return false, fmt.Errorf("error changing to intended-new-root directory %q: %v", root, err)
+		}
+		if err := unix.Chroot(root); err != nil {
+			return false, fmt.Errorf("error chrooting to directory %q: %v", root, err)
+		}
+		if err := os.Chdir(string(os.PathSeparator)); err != nil {
+			return false, fmt.Errorf("error changing to just-became-root directory %q: %v", root, err)
+		}
+		return true, nil
+	}
+	return false, nil
+}
+
+func chrMode(mode os.FileMode) uint32 {
+	return uint32(unix.S_IFCHR | mode)
+}
+
+func blkMode(mode os.FileMode) uint32 {
+	return uint32(unix.S_IFBLK | mode)
+}
+
+func mkdev(major, minor uint32) uint64 {
+	return unix.Mkdev(major, minor)
+}
+
+func mkfifo(path string, mode uint32) error {
+	return unix.Mkfifo(path, mode)
+}
+
+func mknod(path string, mode uint32, dev int) error {
+	return unix.Mknod(path, mode, dev)
+}
+
+func chmod(path string, mode os.FileMode) error {
+	return os.Chmod(path, mode)
+}
+
+func chown(path string, uid, gid int) error {
+	return os.Chown(path, uid, gid)
+}
+
+func lchown(path string, uid, gid int) error {
+	return os.Lchown(path, uid, gid)
+}
+
+func lutimes(isSymlink bool, path string, atime, mtime time.Time) error {
+	if atime.IsZero() || mtime.IsZero() {
+		now := time.Now()
+		if atime.IsZero() {
+			atime = now
+		}
+		if mtime.IsZero() {
+			mtime = now
+		}
+	}
+	return unix.Lutimes(path, []unix.Timeval{unix.NsecToTimeval(atime.UnixNano()), unix.NsecToTimeval(mtime.UnixNano())})
+}
+
+const (
+	testModeMask           = int64(os.ModePerm)
+	testIgnoreSymlinkDates = false
+)