1 files changed, 33 insertions, 0 deletions
diff --git a/vendor/github.com/opencontainers/selinux/go-selinux/xattrs_linux.go b/vendor/github.com/opencontainers/selinux/go-selinux/xattrs_linux.go
index c6b0a7f26..9e473ca16 100644
--- a/vendor/github.com/opencontainers/selinux/go-selinux/xattrs_linux.go
+++ b/vendor/github.com/opencontainers/selinux/go-selinux/xattrs_linux.go
@@ -36,3 +36,36 @@ func doLgetxattr(path, attr string, dest []byte) (int, error) {
 		}
 	}
 }
+
+// getxattr returns a []byte slice containing the value of
+// an extended attribute attr set for path.
+func getxattr(path, attr string) ([]byte, error) {
+	// Start with a 128 length byte array
+	dest := make([]byte, 128)
+	sz, errno := dogetxattr(path, attr, dest)
+	for errno == unix.ERANGE { //nolint:errorlint // unix errors are bare
+		// Buffer too small, use zero-sized buffer to get the actual size
+		sz, errno = dogetxattr(path, attr, []byte{})
+		if errno != nil {
+			return nil, errno
+		}
+
+		dest = make([]byte, sz)
+		sz, errno = dogetxattr(path, attr, dest)
+	}
+	if errno != nil {
+		return nil, errno
+	}
+
+	return dest[:sz], nil
+}
+
+// dogetxattr is a wrapper that retries on EINTR
+func dogetxattr(path, attr string, dest []byte) (int, error) {
+	for {
+		sz, err := unix.Getxattr(path, attr, dest)
+		if err != unix.EINTR { //nolint:errorlint // unix errors are bare
+			return sz, err
+		}
+	}
+}