1 files changed, 27 insertions, 0 deletions
diff --git a/lockdev.h b/lockdev.h
new file mode 100644
index 0000000..61801d6
--- /dev/null
+++ b/lockdev.h
@@ -0,0 +1,27 @@
+#ifndef LOCK_DEV
+#define LOCK_DEV
+
+/*  Copyright 2005,2009,2018 Alain Knaff.
+ *  This file is part of mtools.
+ *
+ *  Mtools is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Mtools 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Mtools.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Create an advisory lock on the device to prevent concurrent writes.
+ * Uses either lockf, flock, or fcntl locking methods.  See the Makefile
+ * and the Configure files for how to specify the proper method.
+ */
+
+extern int lock_dev(int fd, int mode, struct device *dev);
+
+#endif