Fix FreeBSD suport

Ref https://github.com/containers/skopeo/issues/1163

drivers/driver_freebsd.go

@@ -2,8 +2,6 @@ package graphdriver
 
 import (
 	"syscall"
-
-	"golang.org/x/sys/unix"
 )
 
 var (
@@ -15,7 +13,7 @@ var (
 
 // Mounted checks if the given path is mounted as the fs type
 func Mounted(fsType FsMagic, mountPath string) (bool, error) {
-	var buf unix.Statfs_t
+	var buf syscall.Statfs_t
 	if err := syscall.Statfs(mountPath, &buf); err != nil {
 		return false, err
 	}

pkg/archive/archive_freebsd.go

@@ -0,0 +1,126 @@
+// +build freebsd
+
+package archive
+
+import (
+	"archive/tar"
+	"errors"
+	"os"
+	"path/filepath"
+	"syscall"
+
+	"github.com/containers/storage/pkg/idtools"
+	"github.com/containers/storage/pkg/system"
+	rsystem "github.com/opencontainers/runc/libcontainer/system"
+	"golang.org/x/sys/unix"
+)
+
+// fixVolumePathPrefix does platform specific processing to ensure that if
+// the path being passed in is not in a volume path format, convert it to one.
+func fixVolumePathPrefix(srcPath string) string {
+	return srcPath
+}
+
+// getWalkRoot calculates the root path when performing a TarWithOptions.
+// We use a separate function as this is platform specific. On Linux, we
+// can't use filepath.Join(srcPath,include) because this will clean away
+// a trailing "." or "/" which may be important.
+func getWalkRoot(srcPath string, include string) string {
+	return srcPath + string(filepath.Separator) + include
+}
+
+// CanonicalTarNameForPath returns platform-specific filepath
+// to canonical posix-style path for tar archival. p is relative
+// path.
+func CanonicalTarNameForPath(p string) (string, error) {
+	return p, nil // already unix-style
+}
+
+// chmodTarEntry is used to adjust the file permissions used in tar header based
+// on the platform the archival is done.
+
+func chmodTarEntry(perm os.FileMode) os.FileMode {
+	return perm // noop for unix as golang APIs provide perm bits correctly
+}
+
+func setHeaderForSpecialDevice(hdr *tar.Header, name string, stat interface{}) (err error) {
+	s, ok := stat.(*syscall.Stat_t)
+
+	if ok {
+		// Currently go does not fill in the major/minors
+		if s.Mode&unix.S_IFBLK != 0 ||
+			s.Mode&unix.S_IFCHR != 0 {
+			hdr.Devmajor = int64(major(uint64(s.Rdev))) // nolint: unconvert
+			hdr.Devminor = int64(minor(uint64(s.Rdev))) // nolint: unconvert
+		}
+	}
+
+	return
+}
+
+func getInodeFromStat(stat interface{}) (inode uint64, err error) {
+	s, ok := stat.(*syscall.Stat_t)
+
+	if ok {
+		inode = s.Ino
+	}
+
+	return
+}
+
+func getFileUIDGID(stat interface{}) (idtools.IDPair, error) {
+	s, ok := stat.(*syscall.Stat_t)
+
+	if !ok {
+		return idtools.IDPair{}, errors.New("cannot convert stat value to syscall.Stat_t")
+	}
+	return idtools.IDPair{UID: int(s.Uid), GID: int(s.Gid)}, nil
+}
+
+func major(device uint64) uint64 {
+	return (device >> 8) & 0xfff
+}
+
+func minor(device uint64) uint64 {
+	return (device & 0xff) | ((device >> 12) & 0xfff00)
+}
+
+// handleTarTypeBlockCharFifo is an OS-specific helper function used by
+// createTarFile to handle the following types of header: Block; Char; Fifo
+func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
+	if rsystem.RunningInUserNS() {
+		// cannot create a device if running in user namespace
+		return nil
+	}
+
+	mode := uint32(hdr.Mode & 07777)
+	switch hdr.Typeflag {
+	case tar.TypeBlock:
+		mode |= unix.S_IFBLK
+	case tar.TypeChar:
+		mode |= unix.S_IFCHR
+	case tar.TypeFifo:
+		mode |= unix.S_IFIFO
+	}
+
+	return system.Mknod(path, mode, uint64(system.Mkdev(hdr.Devmajor, hdr.Devminor)))
+}
+
+func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo, forceMask *os.FileMode) error {
+	permissionsMask := hdrInfo.Mode()
+	if forceMask != nil {
+		permissionsMask = *forceMask
+	}
+	if hdr.Typeflag == tar.TypeLink {
+		if fi, err := os.Lstat(hdr.Linkname); err == nil && (fi.Mode()&os.ModeSymlink == 0) {
+			if err := os.Chmod(path, permissionsMask); err != nil {
+				return err
+			}
+		}
+	} else if hdr.Typeflag != tar.TypeSymlink {
+		if err := os.Chmod(path, permissionsMask); err != nil {
+			return err
+		}
+	}
+	return nil
+}

pkg/archive/archive_unix.go

@@ -1,4 +1,4 @@
-// +build !windows
+// +build !windows,!freebsd
 
 package archive
 

pkg/homedir/homedir_others.go

@@ -1,4 +1,4 @@
-// +build !linux,!darwin
+// +build !linux,!darwin,!freebsd
 
 package homedir
 

pkg/mount/mounter_unsupported.go

@@ -1,4 +1,4 @@
-// +build !linux
+// +build !linux,!freebsd
 
 package mount
 

pkg/system/mknod.go

@@ -1,4 +1,4 @@
-// +build !windows
+// +build !windows,!freebsd
 
 package system
 

pkg/system/mknod_freebsd.go

@@ -0,0 +1,22 @@
+// +build freebsd
+
+package system
+
+import (
+	"golang.org/x/sys/unix"
+)
+
+// Mknod creates a filesystem node (file, device special file or named pipe) named path
+// with attributes specified by mode and dev.
+func Mknod(path string, mode uint32, dev uint64) error {
+	return unix.Mknod(path, mode, dev)
+}
+
+// Mkdev is used to build the value of linux devices (in /dev/) which specifies major
+// and minor number of the newly created device special file.
+// Linux device nodes are a bit weird due to backwards compat with 16 bit device nodes.
+// They are, from low to high: the lower 8 bits of the minor, then 12 bits of the major,
+// then the top 12 bits of the minor.
+func Mkdev(major int64, minor int64) uint32 {
+	return uint32(((minor & 0xfff00) << 12) | ((major & 0xfff) << 8) | (minor & 0xff))
+}