Re: List of hostaddrs not supported

On Thu, Jun 8, 2017 at 1:36 AM, Heikki Linnakangas <hlinnaka(at)iki(dot)fi> wrote:

> While testing libpq and GSS the other day, I was surprised by the behavior
> of the host and hostaddr libpq options, if you specify a list of hostnames.
>
> I did this this, and it took me quite a while to figure out what was going
> on:
>
> $ psql "dbname=postgres hostaddr=::1 host=localhost,localhost
>> user=krbtestuser" -c "SELECT 'hello'"
>> psql: GSSAPI continuation error: Unspecified GSS failure. Minor code may
>> provide more information
>> GSSAPI continuation error: Server postgres/localhost,localhost(at)PG(dot)EXAMPLE
>> not found in Kerberos database
>>
>
> That was a pilot error; I specified a list of hostnames, but only one
> hostaddr. But I would've expected to get a more helpful error, pointing
> that out.
>
> Some thoughts on this:
>
> 1. You cannot actually specify a list of hostaddrs. Trying to do so gives
> error:
>
> psql: could not translate host name "::1,::1" to address: Name or service
>> not known
>>
>
> That error message is a bit inaccurate, in that it wasn't really a "host
> name" that it tried to translate, but a raw address in string format.
> That's even more confusing if you make the mistake that you specify
> "hostaddr=localhost":
>

Your commit to fix this part, 76b11e8a43eca4612d, is giving me compiler
warnings:

fe-connect.c: In function 'connectDBStart':
fe-connect.c:1625: warning: 'ret' may be used uninitialized in this function

gcc version 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC)

Cheers,

Jeff