util-lib: add cleanup function for crypt_free

src/basic/crypt-util.h

@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+/***
+  This file is part of systemd.
+
+  Copyright 2017 Zbigniew Jędrzejewski-Szmek
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#if HAVE_LIBCRYPTSETUP
+#include <libcryptsetup.h>
+
+#include "macro.h"
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(struct crypt_device *, crypt_free);
+#endif

src/basic/meson.build

@@ -61,6 +61,7 @@ basic_sources_plain = files('''
         copy.h
         cpu-set-util.c
         cpu-set-util.h
+        crypt-util.h
         def.h
         device-nodes.c
         device-nodes.h