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DefaultDependencies=no
Fixes #2189.
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* add info about sd_event_set_watchdog
* add missing Restart values
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This completes the set of man pages for sd-event and contains some minor
other fixes for other man pages too.
The sd_event_set_name(3) man page is renamed to
sd_event_source_set_description(3), which is the correct name of the
concept today.
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For all units ensure there's an "Automatic Dependencies" section in the
man page, and explain which dependencies are automatically added in all
cases, and which ones are added on top if DefaultDependencies=yes is
set.
This is also done for systemd.exec(5), systemd.resource-control(5) and
systemd.unit(5) as these pages describe common behaviour of various unit
types.
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This convention is almost universal in systemd man pages, and makes
it easier to visually parse the docs.
Also fix some markup along the way.
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Also reword some ungainly grammar constructs.
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Previously it was just descibed that ExecStartPost= commands were
started "after" the ExecStart= command(s).
This hasn't specified after which event, which varies from after it has
been started, after it has exited, after it has sent READY=1 or after it
has taken the bus name, depending on Type=.
This now describes that it happens after the *service* has "started",
as defined by the Type=, and provides some clarification about precisely
when this is.
This may be unnecessary duplication, but it removes the ambiguity as to
whether RemainAfterExit=no means that ExecStartPost= shouldn't be
started because it means the service has stopped when the ExecStart=
command terminates, not "started".
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https://bugzilla.redhat.com/show_bug.cgi?id=1251334
is about a unit file which has
Environment=TERM=linux PS1=system-upgrade:\w\$\x20
We used to allow that, but after recent tightening of parsing
rules, we barf. Make it clear that this is intentional.
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This did not really work out as we had hoped. Trying to do this upstream
introduced several problems that probably makes it better suited as a
downstream patch after all. At any rate, it is not releaseable in the
current state, so we at least need to revert this before the release.
* by adjusting the path to binaries, but not do the same thing to the
search path we end up with inconsistent man-pages. Adjusting the search
path too would be quite messy, and it is not at all obvious that this is
worth the effort, but at any rate it would have to be done before we
could ship this.
* this means that distributed man-pages does not make sense as they depend
on config options, and for better or worse we are still distributing
man pages, so that is something that definitely needs sorting out before
we could ship with this patch.
* we have long held that split-usr is only minimally supported in order
to boot, and something we hope will eventually go away. So before we start
adding even more magic/effort in order to make this work nicely, we should
probably question if it makes sense at all.
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As requested in #199.
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In particular, use /lib/systemd instead of /usr/lib/systemd in distributions
like Debian which still have not adopted a /usr merge setup.
Use XML entities from man/custom-entities.ent to replace configured paths while
doing XSLT processing of the original XML files. There was precedent of some
files (such as systemd.generator.xml) which were already using this approach.
This addresses most of the (manual) fixes from this patch:
http://anonscm.debian.org/cgit/pkg-systemd/systemd.git/tree/debian/patches/Fix-paths-in-man-pages.patch?h=experimental-220
The idea of using generic XML entities was presented here:
http://lists.freedesktop.org/archives/systemd-devel/2015-May/032240.html
This patch solves almost all the issues, with the exception of:
- Path to /bin/mount and /bin/umount.
- Generic statements about preference of /lib over /etc.
These will be handled separately by follow up patches.
Tested:
- With default configure settings, ran "make install" to two separate
directories and compared the output to confirm they matched exactly.
- Used a set of configure flags including $CONFFLAGS from Debian:
http://anonscm.debian.org/cgit/pkg-systemd/systemd.git/tree/debian/rules
Installed the tree and confirmed the paths use /lib/systemd instead of
/usr/lib/systemd and that no other unexpected differences exist.
- Confirmed that `make distcheck` still passes.
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processes
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Add a couple of exampels, at least one for each service type that
include some explanations and pointers to various relevant options.
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With this change it is possible to send file descriptors to PID 1, via
sd_pid_notify_with_fds() which PID 1 will store individually for each
service, and pass via the usual fd passing logic on next invocation.
This is useful for enable daemon reload schemes where daemons serialize
their state to /run, push their fds into PID 1 and terminate, restoring
their state on next start from the data in /run and passed in from PID
1.
The fds are kept by PID 1 as long as no POLLHUP or POLLERR is seen on
them, and the service they belong to are either not dead or failed, or
have a job queued.
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The handling of the command name and other arguments is unified. This
simplifies things and should make them more predictable for users.
Incidentally, this makes ExecStart handling match the .desktop file
specification, apart for the requirment for an absolute path.
https://bugs.freedesktop.org/show_bug.cgi?id=86171
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http://lists.freedesktop.org/archives/systemd-devel/2014-November/025492.html
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Option was being parsed but not used for anything.
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if sigabrt doesn't do the job, follow regular shutdown
routine, sigterm > sigkill.
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It is very long already, and obscures the description of
ExecStart, and it is about to get longer.
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Add a new directive called BusPolicy to define custom endpoint policies. If
one such directive is given, an endpoint object in the service's ExecContext is
created and the given policy is added to it.
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https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=760613
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Also, change the default action on a system start-up timeout to powering off.
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When this system-wide start-up timeout is hit we execute one of the
failure actions already implemented for services that fail.
This should not only be useful on embedded devices, but also on laptops
which have the power-button reachable when the lid is closed. This
devices, when in a backpack might get powered on by accident due to the
easily reachable power button. We want to make sure that the system
turns itself off if it starts up due this after a while.
When the system manages to fully start-up logind will suspend the
machine by default if the lid is closed. However, in some cases we don't
even get as far as logind, and the boot hangs much earlier, for example
because we ask for a LUKS password that nobody ever enters.
Yeah, this is a real-life problem on my Yoga 13, which has one of those
easily accessible power buttons, even if the device is closed.
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This is useful for services that simply want to run something on
shutdown, but not at bootup. They should only set ExecStop= but leave
ExecStart= unset.
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Noticed by thp on #systemd.
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This does the inverse of RestartPreventExitStatus=: it forces a restart
of a service when a certain exit status is returned by a service
process.
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Restart=on-abnormal is similar to Restart=on-failure, but avoids
restarts on unclean exit codes (but still doing restarts on all
obviously unclean exits, such as timeouts, signals, coredumps, watchdog
timeouts).
Also see:
https://fedorahosted.org/fpc/ticket/191
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http://lists.freedesktop.org/archives/systemd-devel/2014-May/019054.html
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It has the same possible values as StartLimitAction= and is executed
immediately if a service fails.
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When rebooting with systemctl, an optional argument can be passed to the
reboot system call. This makes it possible the specify the argument in a
service file and use it when the service triggers a restart.
This is useful to distinguish between manual reboots and reboots caused by
failing services.
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https://bugs.freedesktop.org/show_bug.cgi?id=73177
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