Having systemctl disable/unmask remove all symlinks in /etc and /run is
unintuitive and breaks existing use cases.
systemctl should behave symmetrically.
A "systemctl --runtime unmask" should undo a "systemctl --runtime mask"
action.
Say you have a service, which was masked by the admin in /etc.
If you temporarily want to mask the execution of the service (say in a
script), you'd create a runtime mask via "systemctl --runtime mask".
It is is now no longer possible to undo this temporary mask without
nuking the admin changes, unless you start rm'ing files manually.
While it is useful to be able to remove all enablement/mask symlinks in
one go, this should be done via a separate command line switch, like
"systemctl --all unmask".
This reverts commit 4910b35078.
Fixes: #9393
Since sd_dhcp_lease_get_routes() returns the list of all routes,
the caller may need to differenciate whether the route was option
33 (static-routes) or 121 (classless-static-route).
Add an accessor for the internal field.
This is really useful for running commands like this:
# systemd-run -i someimage.raw -b systemd.run='"some command line"'
This will now run the command line inside a small Type=oneshot service
and even propagate the exit code of the command back to the parent. And
all that with the full system booted up.
By default this causes the system to shutdown right after the command
completed, but this can be tweaked with systemd.run_success_action= and
systemd.run_failure_action=.
Note that when used in VMs the exit status can of course not be
propagate, as VMs don't really know a concept for that.
This adds SuccessActionExitStatus= and FailureActionExitStatus= that may
be used to configure the exit status to propagate in when
SuccessAction=exit or FailureAction=exit is used.
When not specified let's also propagate the exit status of the main
process we fork off for the unit.
Otherwise we might conflict with the "no-processes-in-inner-cgroup" rule
of cgroupsv2. Consider nspawn starting up and initializing its cgroup
hierarchy with "supervisor/" and "payload/" as subcgroup, with itself
moved into the former and the payload into the latter. Now, if an
ExecStartPre= is run right after it cannot be placed in the main cgroup,
because that is now in inner cgroup with populated children.
Hence, let's run these helpers in another sub-cgroup .control/ below it.
This is somewhat ugly since it weakens the clear separation of
ownership, but given that this is an explicit contract, and double opt-in should be acceptable.
Fixes: #10482
Let's highlight the unit description string in the status updates, to
separate them a bit more the english sentence they are part of, and thus
make the different casing less surprising.
It tests importing and exporting, and a few other machinectl commands.
It currently does not test pulling (i.e. http downloads), but we might
want to add that later on.
Michael Biebl
Lennart Poettering
Zbigniew Jędrzejewski-Szmek
Evgeny Vereshchagin
Thomas Haller
Yu Watanabe
Susant Sahani
Claudius Ellsel