O Mark Fenbers έγραψε στις May 22, 2006 :
> I have working PostgreSQL databases on 3 of my ~30 Linux boxes. I want
> my software to be able to determine which of my 30 boxes have functional
> databases on them. Since Pg is part of the baseline distro, merely
> checking for the existence of an executable doesn't solve my problem.
>
> I tried looping through my list of hosts and running the command:
> psql -h $host --list
> but this fails on a box with a database with the same error code as on a
> box that doesn't have a database, if my PGUSER isn't set and my login ID
> is not the username of the database. The PGUSER setting might differ
> for each host, so specifying this in the software is not practical.
>
> Bottom line: What trick can I use to determine whether a box has a
> living, breathing Pg database if I don't know the DB owner?
Use a net mgmt tool (like opennms).
netcat, telnet to 5432, etc...
>
> Mark
>
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-Achilleus