On Tue, Dec 5, 2017 at 10:03 AM, Craig Ringer <cr...@2ndquadrant.com> wrote:
> pglogical sets up its own handler 'handle_sigterm'. However, it now does
> much the same as src/backend/tcop/postgres.c's 'die' function, just without
> the single-user mode checks.

Documentation shows a simple example of that:
https://www.postgresql.org/docs/devel/static/source-conventions.html

> IMO it's silly to customise them, and a bad example.

I don't agree. It is not silly to have background workers being able
to take clean up actions and have their own tracking with some
sig_atomic_t flags.
-- 
Michael

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