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#1 (**permalink**) 04-10-2008, 05:47 AM

Hi,

I want to run some sql scripts through psql from a process that runs as
root. Since I have no reason to trust the sql scripts, I want to run
them in psql as a specific database user that doesn't have a
corresponding login account, i.e. I want to do something like

[start as root]
su - postgres
psql DBNAME DBUSER < script.sql

or
[start as root]
su - postgres
psql
\connect DBNAME DBUSER
\i script.sql

The problem is that I haven't been able to do this without being
prompted for a password. Is this possible, i.e. is there a way to go
from a superuser (postgres) to a less privileged user without having to
supply the password ?

thanks,
David

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#2 (**permalink**) 04-10-2008, 05:47 AM

On Fri, Feb 03, 2006 at 15:48:35 -0800,
David Lutterkort <dlutter@redhat.com> wrote:
> Hi,
>
> I want to run some sql scripts through psql from a process that runs as
> root. Since I have no reason to trust the sql scripts, I want to run
> them in psql as a specific database user that doesn't have a
> corresponding login account, i.e. I want to do something like
>
> [start as root]
> su - postgres
> psql DBNAME DBUSER < script.sql
>
> or
> [start as root]
> su - postgres
> psql
> \connect DBNAME DBUSER
> \i script.sql
>
> The problem is that I haven't been able to do this without being
> prompted for a password. Is this possible, i.e. is there a way to go
> from a superuser (postgres) to a less privileged user without having to
> supply the password ?

You could use ident authentication and let the OS 'postgres' user connect
as any postgres user.

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#3 (**permalink**) 04-10-2008, 05:47 AM

Bruno Wolff III wrote:
> On Fri, Feb 03, 2006 at 15:48:35 -0800,
> David Lutterkort <dlutter@redhat.com> wrote:

> > [start as root]
> > su - postgres
> > psql
> > \connect DBNAME DBUSER
> > \i script.sql

Instead of using \connect, use SET SESSION AUTHORIZATION (and connect to
the right database in the first place).

--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

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