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Bug#149491: dpkg depends hard on working F_SETLK fcntl



On Mon, Jun 10, 2002 at 01:02:29AM +0200, Paul Stoeber wrote:
> dpkg refuses to operate ("unable to lock dpkg status database"),
> if the F_SETLK fcntl doesn't work on the filesystem where
> /var/lib/dpkg/lock is located.
> 
> That's bad because it's not easy to get F_SETLK to work on NFS.

Works for me. Did you forget to start rpc.lockd?

> I ran into this when trying to install Debian from
> woody_netinst-20020416-powerpc.iso.

I seem to recall having to manually bootstrap stuff from the
installer, because it didn't start rpc.lockd automatically 

> It would be nice if the user could at least work around this problem
> from within the shell provided on the installation CD.  I don't currently
> see such a workaround, but any one of the following changes to dpkg would
> make it possible:
<snip>

Just use NFS locking. The whole point of fcntl F_SETLK is that it
works over NFS, while flock() does not.

-- 
  .''`.  ** Debian GNU/Linux ** | Andrew Suffield
 : :' :  http://www.debian.org/ | Dept. of Computing,
 `. `'                          | Imperial College,
   `-             -><-          | London, UK

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