Re: s6/s6-rc policy for Gentoo: user session tracking

[Paul Sopka]

These two last points, if you really decide to implement them like that in
the final version, may require some synchronization, e.g. via file locking.
It is not impossible (I mean, it is quite unlikely, but especially with
automated CI systems not impossible *at all*) for two SSH sessions to
come in practically at once, and I have indeed seen shell startup scripts
run the same program at the same time.

Good point. If I understood everything correctly, this can be easily solved by the "flock" command, right?

It would be... interesting to have one login session write the first line,
then another session immediately write the second one, and then neither of
them will find exactly one line in the file 🙂 And same for logout.

Indeed.


Have a nice weekend!

Paul

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