Next: LIDS-free sessions implementation Up: Most important data structures Previous: lids_caps_s Contents

`lids_lfs_s`

typedef struct lids_prog_struct {
        lids_lds_s *next;
	task_struct *task;
	int tag;
} lids_prog_s;

We can see how these structures are linked in memory on figure .

**Figure:** Link between data structures
$\includegraphics[width=\linewidth]{fig/ds_conf.eps}$

The figure shows only the lids_prog_s structure links, for the example of the figure . We imagine that /usr/bin, /etc/init.d and /sbin have the same image through the hash function. Idem for /usr/X11/bin/XF86 and /bin.

**Figure:** Program structures in memory for fig.
$\includegraphics[width=\linewidth]{fig/ds_ex1.eps}$

If we focus on the two permissions sets of the figure , and take in account the inheritance of /usr/bin permissions by /usr/bin/httpd, we can have the structures arrangement in memory as shown in figure . The inheritance is effective thanks to the bold arrow.

**Figure:** Program structures in memory
$\includegraphics[width=\linewidth]{fig/ds_ex2.eps}$

Biondi Philippe 2000-12-15