1#ifndef _SYS_FILE_H
 2#define _SYS_FILE_H
 3#ifdef __cplusplus
 4extern "C" {
 5#endif
 6
 7#define LOCK_SH	1
 8#define LOCK_EX	2
 9#define LOCK_NB	4
10#define LOCK_UN	8
11
12#define L_SET 0
13#define L_INCR 1
14#define L_XTND 2
15
16int flock(int, int);
17
18#ifdef __cplusplus
19}
20#endif
21#endif