>>> I tried exporting
>>> the FIREBIRD_TMP environment variable (pointing to $HOME/appname/fbtmp)
>>> before starting the program, but that seems to be ignored (strace tells
>>> me so). I am using Firebird 2.5 beta 2.
>>
>> Lock table and few other files are placed in /tmp/firebird only, it not depends
>> on any environment variable.
>
> Hi Vlad,
>
> Is this new in Firebird 2.5? I don't recall having such problems with
> 2.0 for example. IIRC, I did have multiple users running "embedded" at
> the same time without problems.

Yes, in every release we try to add security to Firebird. And, in 2.5,
work with memory mapped filed was changed.

But, again, i can be wrong in details as i'm not a linux man ;) You can
ask in fb-devel for exact info.

Regards,
Vlad

PS I'm sure all such details will be present in release notes.