3 * Copyright (C) 2002 Simone Piccardi
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 /*****************************************************************************
22 * Function to manipulate lock files.
24 * Author: S. Piccardi, Dec 2002
26 *****************************************************************************/
27 #include <sys/types.h> /* primitive system data types */
28 #include <sys/stat.h> /* file characteristics constants and functions */
29 #include <unistd.h> /* unix standard library */
30 #include <fcntl.h> /* file control functions */
34 * Create a lockfile of the given pathname. Fail and exit in case of
35 * error or existence of the same lock file, using unlink do not need
38 * Author: Simone Piccardi, Dec. 2002
40 int LockFile(const char* path_name)
42 return open(path_name, O_EXCL|O_CREAT);
45 * Function UnlockFile:
46 * Remove a lockfile of the given pathname.
48 * Author: Simone Piccardi, Dec. 2002
50 int UnlockFile(const char* path_name)
52 return unlink(path_name);