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#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
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