vendor: vendor fscrypt integration dependencies

Signed-off-by: Marcel Lauhoff <marcel.lauhoff@suse.com>

vendor/github.com/pkg/xattr/xattr_darwin.go

@@ -0,0 +1,90 @@
+//go:build darwin
+// +build darwin
+
+package xattr
+
+import (
+	"os"
+	"syscall"
+
+	"golang.org/x/sys/unix"
+)
+
+// See https://opensource.apple.com/source/xnu/xnu-1504.15.3/bsd/sys/xattr.h.auto.html
+const (
+	// XATTR_SUPPORTED will be true if the current platform is supported
+	XATTR_SUPPORTED = true
+
+	XATTR_NOFOLLOW        = 0x0001
+	XATTR_CREATE          = 0x0002
+	XATTR_REPLACE         = 0x0004
+	XATTR_NOSECURITY      = 0x0008
+	XATTR_NODEFAULT       = 0x0010
+	XATTR_SHOWCOMPRESSION = 0x0020
+
+	// ENOATTR is not exported by the syscall package on Linux, because it is
+	// an alias for ENODATA. We export it here so it is available on all
+	// our supported platforms.
+	ENOATTR = syscall.ENOATTR
+)
+
+func getxattr(path string, name string, data []byte) (int, error) {
+	return unix.Getxattr(path, name, data)
+}
+
+func lgetxattr(path string, name string, data []byte) (int, error) {
+	return unix.Lgetxattr(path, name, data)
+}
+
+func fgetxattr(f *os.File, name string, data []byte) (int, error) {
+	return getxattr(f.Name(), name, data)
+}
+
+func setxattr(path string, name string, data []byte, flags int) error {
+	return unix.Setxattr(path, name, data, flags)
+}
+
+func lsetxattr(path string, name string, data []byte, flags int) error {
+	return unix.Lsetxattr(path, name, data, flags)
+}
+
+func fsetxattr(f *os.File, name string, data []byte, flags int) error {
+	return setxattr(f.Name(), name, data, flags)
+}
+
+func removexattr(path string, name string) error {
+	return unix.Removexattr(path, name)
+}
+
+func lremovexattr(path string, name string) error {
+	return unix.Lremovexattr(path, name)
+}
+
+func fremovexattr(f *os.File, name string) error {
+	return removexattr(f.Name(), name)
+}
+
+func listxattr(path string, data []byte) (int, error) {
+	return unix.Listxattr(path, data)
+}
+
+func llistxattr(path string, data []byte) (int, error) {
+	return unix.Llistxattr(path, data)
+}
+
+func flistxattr(f *os.File, data []byte) (int, error) {
+	return listxattr(f.Name(), data)
+}
+
+// stringsFromByteSlice converts a sequence of attributes to a []string.
+// On Darwin and Linux, each entry is a NULL-terminated string.
+func stringsFromByteSlice(buf []byte) (result []string) {
+	offset := 0
+	for index, b := range buf {
+		if b == 0 {
+			result = append(result, string(buf[offset:index]))
+			offset = index + 1
+		}
+	}
+	return
+}