ObjFW  Diff

		     length: (size_t)length
{
	if (_fd == -1 || _atEndOfStream || write(_fd, buffer, length) < length)
		@throw [OFWriteFailedException exceptionWithStream: self
						   requestedLength: length];
}

- (void)lowlevelSeekToOffset: (off_t)offset
		      whence: (int)whence
- (off_t)lowlevelSeekToOffset: (off_t)offset
		       whence: (int)whence
{
	if (lseek(_fd, offset, whence) == -1)
	off_t ret = lseek(_fd, offset, whence);

	if (ret == -1)
		@throw [OFSeekFailedException exceptionWithStream: self
							   offset: offset
							   whence: whence];

	return ret;
}

- (int)fileDescriptorForReading
{
	return _fd;
}