#ifndef _SYS_FILE_H
#define _SYS_FILE_H
#ifdef __cplusplus
extern "C" {
#endif

#define LOCK_SH 1
#define LOCK_EX 2
#define LOCK_NB 4
#define LOCK_UN 8

#define L_SET 0
#define L_INCR 1
#define L_XTND 2

int flock(int, int);

#ifdef __cplusplus
}
#endif
#endif