1 #ifndef LOCK_DEV 2 #define LOCK_DEV 3 4 /* Copyright 2005,2009,2018 Alain Knaff. 5 * This file is part of mtools. 6 * 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. 11 * 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. 16 * 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/>. 19 * 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. 23 */ 24 25 extern int lock_dev(int fd, int mode, struct device *dev); 26 27 #endif 28