On 22/03/2021 11:07, Gordon Messmer wrote:
I'd like to inhibit suspend while backups run on my laptop. I'm scheduling those backups
with a systemd timer[1] and service[2]. I've read that the default polkit policy only
permits inhibiting suspend from within a login session, so I've also tried to add rules
to allow the root user to inhibit suspend[3]. However, with all of those in place, I
still get errors that I think indicate that the "systemd-inhibit" command is
failing[4].
I'm running this on Fedora 33. Has anyone successfully used systemd-inhibit from a systemd unit?
I have not used, or even tried to use, systemd-inhibit.
But, when testing things I like to use examples which use simple system
commands. To verify that things
work as I think they should in various ways before trying my commands/scripts.
FWIW, I ssh'ed into a system and ran....
sudo /usr/bin/systemd-inhibit sleep 30
In another terminal, systemd-inhibit --list showed
sleep 30 0 root 2634 systemd-inhibit shutdown:sleep:idle
I then created a crontab for root of
00,10,20,30,40,50 * * * * /usr/bin/systemd-inhibit sleep 60
and at the appropriate minute in time systemd-inhibit --list showed
sleep 60 0 root 2681 systemd-inhibit shutdown:sleep:idle
The crontab, in particular, isn't a login session. Note: --mode=block is the
default according to the man page.
So, does your backup process work when called from crontab entry?
--
People who believe they don't make mistakes have already made one.
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