Andrew Dunstan wrote:

> Perl provides a moderately portable flock(), which we use in fact in
> buildfarm to stop it from running more than one at a time on a given repo
> copy.

> Maybe we can borrow some code.

Probably not, because it's GPL/Artistic; but we could borrow some ideas

The relevant code is here

Alvaro Herrera                      
The PostgreSQL Company - Command Prompt, Inc.

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