int and_sysutil_lock_file_read(int fd) { return lock_internal(fd, F_RDLCK); }
int lock_file_write(int fd) { return lock_internal(fd, F_WRLCK); }
int and_sysutil_lock_file_write(int fd) { return lock_internal(fd, F_WRLCK); }
int lock_file_read(int fd) { return lock_internal(fd, F_RDLCK); }