22 Nov
2012
22 Nov
'12
12:03 a.m.
Brian May <brian@microcomaustralia.com.au> wrote:
This is LDAP, the order the server gives the results is undefined.
Can you look up a user/group by ID? If so, one idea would be: 1. Perform an initial scan of the users/groups. 2. Cache (i.e., memoize) the greatest uid/gid. 3. To add a new user/group, retrieve the highest uid/gid from the database/file/whatever, then probe consecutive uids/gids until an unused one is found, then (locking if necessary) allocate a new user/group and update the stored value accordingly. This way you only perform the expensive scan once.