In the documentation we usually spell the concept "control group".
Internally in code we usually call it "cgroup" or "CGroup". In systemctl output we
called the field "CGroup" so far, i.e. a capitalized version of the
internal name. This is of course very unsystematic. Let's clean this up
a bit: let's now say:
* in docs, continue to spell it out "control groups"
* in brief output call it "CGroup"
* internally call it "cgroup" or "CGroup"
Fixes: #14429
Linux kernel will, as documented in drivers/video/backlight/backlight.c,
report changes to a backlights brightness as a uevent (ACTION=change).
systemd-udev will consume the uevent, match on this rule and try to
activate the systemd-backlight service for the backlight. BUT when
systemd is not compiled with backlight support, this will lead to
failure that is reported in the journal.
Since the failure to activate systemd-backlight and subsequent failure
log entry happens on every backlight brightness change, we found the
resulting logspam during regular operation excessive and came up with
this patch to mitigate it.
The conditional is also extended to "*kbd_backlight" match, since
even though we did not investigate to see if the logspam would be
similar, the unconditional match to activate systemd-backlight here
would also not make sense when the feature is not compiled in.
Signed-off-by: Simon Braunschmidt <simon.braunschmidt@iba-group.com>
Instead of using a privileged and unprivileged user to test the
offline and online logic of systemd-repart, let's always run repart
as root and use the --offline= argument to specify repart to use
either the offline or online logic.
This allows checking from shell scripts whether the system is in a low
battery state. It just exposed the code we anyway have in a directly
accessible way.
This is also very useful for testing things.
This moves a first batch of functions from sleep-config.[ch] over to
battery-util.[ch].
In the long run we should probably move even more stuff over, i.e.
anything that deals with the battery sysfs driver interface.
No code change.
