B_UNREAD
write_read_attr(file, B_UNREAD);
previousRead != B_UNREAD)
write_read_attr(node, B_UNREAD);
currentFlag = B_UNREAD;
currentFlag = B_UNREAD;
if (currentFlag == B_UNREAD)
if (flag == B_UNREAD) {
read_flags flag = B_UNREAD;
flag = B_UNREAD;