Re: Have an external script wait for a oneshot service

Paul Sopka <[email protected]> Wed, 4 Dec 2024 18:12:07 +0100
Newsgroups gmane.comp.sysutils.supervision.general
Message-ID <[email protected]>
Thank you for your answer!
> I could be mistaken, but I thought one-shots were specifically designed for
> fire-and-forget use,

I would argue that the following speaks against this:

- s6-rc tracks the state of oneshots already in that you can not run
    "s6-rc start <oneshot>" multiple times without "s6-rc stop 
<oneshot>" in between.

- Longrun service A can depend on a oneshot B in that it is only ran 
once B is finished.

- It is useful to know whether and when a oneshot task is finished.

By the above I would argue that oneshots are on equal footing with
and of equal importance as longruns, not just "fire-and-forget" and
therefore would profit from an equally powerful readiness api.

> and that if you want to monitor it that way, you should
> use a regular service.
This is not possible, since what I depend on is a script that does its 
thing and exits.
I would need to add a "sleep infinity" or better, a posix compatible 
alternative at its end,
which would cause a useless dangling longrun being supervised and logged 
- a waste of resources.

Regards

Paul Sopka
OpenPGP_0x71C7C85A2EA30F62.asc (application/pgp-keys, 3.1 KB)
-----BEGIN PGP PUBLIC KEY BLOCK-----
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=hu4K
-----END PGP PUBLIC KEY BLOCK-----
OpenPGP_signature.asc (application/pgp-signature, 840 B)
-----BEGIN PGP SIGNATURE-----
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=d2Zx
-----END PGP SIGNATURE-----