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Previously we'd allow marking TTY sessions as idle, but when the user
tried to unmark it as idle again it we'd just revert to automatic TTY
atime idle detection, thus making it impossible to mark the session as
non-idle, unless its TTY is atime-touched all the time. But of course,
marking a session as idle is pretty much fatal if you never can mark it
as non-idle again.
This change is triggred by bug reports such as this:
https://github.com/systemd/systemd/issues/14053
With this patch we will now output a clean, clear error message if a
client tries to manipulate the idle state of a non-graphical session.
This means we now have clear rules: "manual" idle logic for graphical
sessions, and TTY based ones for all others that have a TTY of some
form.
I considered allowing the idle state to be overriden both ways for tty
sessions but that's problematic: for sessions that are temporarily
upgraded from tty to graphical and thus suddenly want to manage their
own idle state we'd need to a way to detect when the upgrade goes away
and thus we should revert to old behaviour. Without reverting to the
previous TTY idle auto-magic we'd otherwise be stuck in an eternally
idle or eternally non-idle state, with really bad effects in case
auto-suspend is used. Thus, let's instead generate a proper error
message, saying clearly we don't support it.
(Also includes some other fixes and clean-ups in related code)
Closes: #14053
We'd just print nothing and exit with 0. If the user gave an explicit
name, we should fail. If a pattern didn't match, we should at least warn.
$ networkctl status enx54ee75cb1dc0a* --no-pager && echo $?
No interfaces matched.
0
$ networkctl status enx54ee75cb1dc0a --no-pager
Interface "enx54ee75cb1dc0a" not found.
1
When starting a mount unit, systemd invokes mount command and moves the
unit's internal state to "mounting". Then it watches for updates of
/proc/self/mountinfo. When the expected mount entry newly appears in
mountinfo, the unit internal state is changed to "mounting-done".
Finally, when systemd finds the mount command has finished, it checks
whether the unit internal state is "mounting-done" and changes the state
to "mounted".
If the state was not "mounting-done" in the last step though mount command
was successfully finished, the unit is marked as "failed" with following
log messages:
Mount process finished, but there is no mount.
Failed with result 'protocol'.
If daemon-reload is done in parallel with starting mount unit, it is
possible that things happen in following order and result in above failure.
1. the mount unit state changes to "mounting"
2. daemon-reload saves the unit state
3. kernel completes the mount and /proc/self/mountinfo is updated
4. daemon-reload restores the saved unit state, that is "mounting"
5. systemd notices the mount command has finished but the unit state
is still "mounting" though it should be "mounting-done"
mount_setup_existing_unit() should take into account that MOUNT_MOUNTING
is transitional state and set MOUNT_PROC_JUST_MOUNTED flag if the unit
comes from /proc/self/mountinfo so that mount_process_proc_self_mountinfo()
later can make state transition from "mounting" to "mounting-done".
Fixes: #10872
I think it makes sense to keep the "The" in place for the actual page's
title, but let's drop it from the categorization header, to make it
easier to find stuff, as the "The" isn't helpful to that.
In particular as we sometimes do it this and sometimes the other way so
far, hence let's stick to one common rule.
