4 /* Copyright 2005,2009,2018 Alain Knaff.
5 * This file is part of mtools.
7 * Mtools is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * Mtools is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Mtools. If not, see <http://www.gnu.org/licenses/>.
20 * Create an advisory lock on the device to prevent concurrent writes.
21 * Uses either lockf, flock, or fcntl locking methods. See the Makefile
22 * and the Configure files for how to specify the proper method.
25 extern int lock_dev(int fd, int mode, struct device *dev);