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It is already in nodist_systemunit_DATA and if it is
shipped, it contains the hardcoded path to systemctl
which will cause it to fail to start when
rootprefix != prefix and rootbindir != bindir.
This reverts commit 0c26bfc3d2.
src/core/org.freedesktop.systemd1.policy.in.in depends on values which
are specified at configure time, so we cannot ship the corresponding
policy file in the tarball.
Since we need to regenerate one policy file, we might as well generate
them all.
A call to sd_event_source_set_io_events() skipps calling into the kernel
if the new event-mask matches the old one. This is safe for
level-triggered sources as the kernel moves them onto the ready-list
automatically if events change. However, edge-triggered sources might not
be on the ready-list even though events are present.
A call to sd_event_source_set_io_events() with EPOLLET set might thus be
used to just move the io-source onto the ready-list so the next poll
will return it again. This is very useful to avoid starvation in
priority-based event queues.
Imagine a read() loop on an edge-triggered fd. If we cannot read data fast
enough to drain the receive queue, we might decide to skip reading for now
and schedule it for later. On edge-triggered io-sources we have to make
sure it's put on the ready-list so the next dispatch-round will return it
again if it's still the highest priority task. We could make sd-event
handle edge-triggered sources directly and allow marking them ready again.
However, it's much simpler to let the kernel do that for now via
EPOLL_CTL_MOD.
The check only cares about whether the module is installed, not enabled.
But installation we should know anyway, after all we ship the module
with systemd these days...
An administrator might want to block a certain sysusers config file from
being executed, e.g. to block the creation of a certain user.
Only a relatively short description is added in the man page, since
overrides should be relatively rare.
Currently after exiting rescue shell we isolate default target. User
might want to isolate to some other target than default one. However
issuing systemctl isolate command to desired target would bring system
to default target as a consequence of running ExecStopPost action.
Having common ancestor for rescue shell and possible followup systemctl
default command should fix this. If user exits rescue shell we will
proceed with isolating default target, otherwise, on manual isolate,
parent shell process is terminated and we don't isolate default target,
but target chosen by user.
Suggested-by: Michal Schmidt <mschmidt@redhat.com>
