#define FNONBLOCK O_NONBLOCK
#define FNDELAY O_NDELAY
-#ifndef F_OK
#define F_OK 0
#define R_OK 4
#define W_OK 2
#define F_LOCK 1
#define F_TLOCK 2
#define F_TEST 3
+
int lockf(int, int, off_t);
#endif
-#endif
#ifdef _LARGEFILE64_SOURCE
#define open64 open