Public bug reported:
The systemd-sleep manpage mentions the following:
Finally, systemd-hybrid-sleep.service is pulled in by hybrid-
sleep.target to execute hybrid hibernation with system suspend.
Immediately before entering system suspend and/or hibernation
systemd-suspend.service (and the other mentioned units, respectively) will run
all executables in /lib/systemd/system-sleep/ and pass two arguments to them.
The first argument
will be "pre", the second either "suspend", "hibernate", or
"hybrid-sleep" depending on the chosen action. Immediately after leaving system
suspend and/or hibernation the same executables are run, but the first argument
is now "post". All
executables in this directory are executed in parallel, and execution of
the action is not continued until all executables have finished.
Note that scripts or binaries dropped in /lib/systemd/system-sleep/ are
intended for local use only and should be considered hacks. If applications
want to be notified of system suspend/hibernation and resume, there are much
nicer interfaces
available.
It is unfortunate that such "hacks" are generally still required to get a
laptop to suspend/hibernate and resume correctly.
However, I don't think /lib is the proper place for such scripts,
especially for those that are added by local administrators. As far as I
know, /lib is handled by dpkg and it should never be required to add
stuff there manually. Note that the FHS is also quite specific in this
regard: "The /lib directory contains those shared library images needed
to boot the system and run the commands in the root filesystem, ie. by
binaries in /bin and /sbin.". This doesn't seem to include custom
scripts as used here.
A better place would probably be /etc/systemd (similar to the obsolete
/etc/pm/sleep.d). At the very least, /lib/systemd/systemd-sleep should
contain a script that calls user-provided scripts from a more
appropriate location.
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1538681
Title:
custom pre/post suspend scripts shoud not live in /lib
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