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diff --git a/lib/libefivar/efivar.h b/lib/libefivar/efivar.h
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+/*-
+ * Copyright (c) 2016 Netflix, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _EFIVAR_H_
+#define _EFIVAR_H_
+
+#include <uuid.h>
+#include <sys/efi.h>
+#include <sys/endian.h>
+#include <stdint.h>
+
+/* Shoud these be elsewhere ? */
+#define EFI_VARIABLE_NON_VOLATILE 0x00000001
+#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x00000002
+#define EFI_VARIABLE_RUNTIME_ACCESS 0x00000004
+#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x00000008
+#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x00000010
+#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS \
+ 0x00000020
+#define EFI_VARIABLE_APPEND_WRITE 0x00000040
+#if 0 /* todo */
+#define EFI_VARIABLE_HAS_AUTH_HEADER
+#define EFI_VARIABLE_HAS_SIGNATURE
+#endif
+
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+#define EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5) \
+ ((efi_guid_t) {(a), (b), (c), { (d) >> 8, (d) & 0xff, \
+ (e0), (e1), (e2), (e3), (e4), (e5) }})
+#else
+#define EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5) \
+ ((efi_guid_t) {(a), (b), (c), { (d) & 0xff, (d) >> 8, \
+ (e0), (e1), (e2), (e3), (e4), (e5) }})
+#endif
+
+#define EFI_GLOBAL_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa0d, \
+ 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
+
+int efi_append_variable(efi_guid_t guid, const char *name,
+ uint8_t *data, size_t data_size, uint32_t attributes);
+int efi_del_variable(efi_guid_t guid, const char *name);
+int efi_get_variable(efi_guid_t guid, const char *name,
+ uint8_t **data, size_t *data_size, uint32_t *attributes);
+int efi_get_variable_attributes(efi_guid_t guid, const char *name,
+ uint32_t *attributes);
+int efi_get_variable_size(efi_guid_t guid, const char *name, size_t *size);
+int efi_get_next_variable_name(efi_guid_t **guid, char **name);
+int efi_guid_cmp(const efi_guid_t *guid1, const efi_guid_t *guid2);
+int efi_guid_is_zero(const efi_guid_t *guid1);
+int efi_guid_to_name(efi_guid_t *guid, char **name);
+int efi_guid_to_symbol(efi_guid_t *guid, char **symbol);
+int efi_guid_to_str(const efi_guid_t *guid, char **sp);
+int efi_name_to_guid(const char *name, efi_guid_t *guid);
+int efi_set_variable(efi_guid_t guid, const char *name,
+ uint8_t *data, size_t data_size, uint32_t attributes);
+int efi_str_to_guid(const char *s, efi_guid_t *guid);
+int efi_variables_supported(void);
+
+/* FreeBSD extensions */
+struct guid_table
+{
+ const char *uuid_str;
+ const char *name;
+ efi_guid_t guid;
+};
+
+int efi_known_guid(struct guid_table **);
+
+extern const efi_guid_t efi_guid_empty;
+
+#endif /* _EFIVAR_H_ */