ssize_t sys_recv(int fd, void *buf, size_t count, int flags);
ssize_t sys_recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen);
int sys_fcntl_ptr(int fd, int cmd, void *arg);
-int sys_fcntl_long(int fd, int cmd, long arg);
void update_stat_ex_mtime(struct stat_ex *dst, struct timespec write_ts);
void update_stat_ex_create_time(struct stat_ex *dst, struct timespec create_time);
int sys_stat(const char *fname, SMB_STRUCT_STAT *sbuf,