int sys_getdents(unsigned int fd, struct linux_dirent* dirp, unsigned int count)
{
	struct buffer_head* bh;
	struct m_inode* inode = current->filp[fd]->f_inode;
	struct linux_dirent m;
	struct dir_entry* dir;
	char* buf;
	int k, n = 0, i;
	if (count <= 0)return -1;
	bh = bread(inode->i_dev, inode->i_zone[0]);
	for (k = 0; k < inode->i_size; k += sizeof(struct linux_dirent))
	{
		if (n + sizeof(struct linux_dirent) > count)return 0;
		dir = (struct dir_entry*)(bh->b_data + k);
		if (dir->inode)
		{
			m.d_ino = dir->inode;
			for (i = 0; i < NAME_LEN; i++)m.d_name[i] = dir->name[i];
			m.d_off = 0;
			m.d_reclen = sizeof(struct linux_dirent);
			buf = &m;
			for (i = 0; i < m.d_reclen; i++)
				put_fs_byte(*(buf + i), (char*)(dirp)+n + i);
			n += sizeof(struct linux_dirent);
		}
		else continue;
	}
	brelse(bh);
	return n;
}