[uml-user] PostgreSQL 7.4.6 cannot create unix socket under 2.6.11-um

[Martin L. (CatalystIT) <ma...@ca...>]

Running on a host Debian 'sarge' system, with linux kernel 
2.6.11-1-686-smp (vanilla Debian kernel-image package, no UML/SKAS 
patches), I find that PostgreSQL (from Debian Sarge packages) cannot start.

This is driving me crazy ;)

The guest kernels I tried are built from both official kernels and 
Debian kernels, versions 2.6.10, 2.6.11 and 2.6.11.7. All compiled with 
roughly the same .config file. The UML instances run on Debian Sarge 
images. Apache, SSH and other daemons run fine. OpenLDAP's slapd needed 
to have /lib/tls removed before it'd start. Network is running ok, with 
the UML accepting connections (SSH/Apache) and connecting to the world 
without problems.

Postgres, however, is a different story. It refuses to startup, with an 
error of:

  could not create Unix socket: Address family not supported by protocol

I've straced it, bumped debug logging to the max and done several silly 
things without much success or further clues. Nothing odd is being 
logged in the guest or in the host machines, except for

  line_ioctl: tty0: unknown ioctl: 0x5603

Has anyone seen this? It's quite clear people are using Postgres under 
UML far and wide, so it must be a freak accident that it doesn't work 
for me.

thanks


martin
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