Leonid Isaev:
> Hello,
>
> One of arguments of pipe(8) is "user=" that instructs it to run an
> external programunder specified user. For example, the following snippet will
> run faxmail(1) under the user faxmail:
> -----8<-----
> fax unix - n n - 1 pipe
> flags= user=faxmail argv=/usr/bin/faxmail -d -n ${user}
> ----->8-----
>
> Is it possible to have postfix select user at random from some list of
> preallocated UIDs/usernames? (I'm looking for ways to isolate different
> instances of the same command)
The user attribute takes a fixed username, not a lookup table.
You can use
/etc/postfix/main.cf:
transport_maps = randmap:{fax1:, fax2:, ...}
to randomly invoke different fax transports, each with their own
fixed username.
Of course random selection is subject to collisions.
Wietse
