Didier Kryn <kryn@???> writes:

[...]

>     Reporting readyness is admin-friendly, but this can be done
> trivially, in the s6 fashion; it does not take a library to do.

https://en.wikipedia.org/wiki/Time_of_check_to_time_of_use
https://cwe.mitre.org/data/definitions/367.html
https://isecpartners.github.io/news/research/2015/03/03/recognizing_preventing_toctou.html

[and no end of other links]

The problem can't be solved other than by processes which need to talk
to other processes implementing a strategy for coping with transient
outages.