On Wed, 4 Dec 2024 21:05:45 +0100 Paul Sopka <pso...@sopka.ch> wrote: > > You could use `s6-rc -a list`, perhaps? It lists all services that are in > > the active state. > >[...] > > Does that give you what you want? > Unfortunately not, since I specifically need to *wait* > and waiting based on "state-info" would require polling, > which I would rather avoid.
Ah, I see: from your external script, you do not want to know *whether* a oneshot service has completed; you want to block *unless or until* it has completed? In that case, I would use `s6-ftrig-notify` in the oneshot service, and both `s6-rc -a list` and `s6-ftrig-wait` in the external script: in the oneshot, as the last action taken before quitting, use `s6-ftrig-notify` to send an event to a fifodir; in the external script, `s6-rc -a list | grep -q $(oneshot_service_name)` to proceed if the oneshot is already up, and then if it is not up, `s6-ftrig-wait` to block until it is. Or, as you say, you can use fifodirs directly without the convenience programs that interact with them already. There might be a race condition there, but that's something you can surely work around if it's a concern. -- Brett Neumeier <ran...@freesa.org>
