If we can't process a specific line in /proc/self/mountinfo we should
log about it (which we do), but this should not affect other lines, nor
further processing of mount units. Let's keep these failures local.
Fixes: #10874
We need to make sure that the slice property is initialized whenever
mount_load() is invoked, even if we fail to load things properly off
disk. This is important since we generally don't allow changing the
slice after a unit has been started. But given that we must track the
state of external objects with mount units we must hence initialize the
property no matter what.
This deps are very similar to the -pre deps, hence establish them at the
same place, in particular as they should only be generated if default
deps are on.
This allows us to later on remove similar code that adds in these deps
whenever /proc/self/mountinfo changes.
This adds a helper call for detaching a DnsServer from a DnsStream if
the latter is the "default" stream of the server.
Also, let's unref the stream in dns_stream_stop() rather than
dns_stream_free(): as soon as our stream is disconnected by stopping
there's really no need to keep it as default stream for the server
around.
Since dns_stream_free() calls dns_stream_stop() we can remove it from
the former.
DnsStream and DnsServer have a symbiotic relationship: one DnsStream is
the current "default" stream of the server (and thus reffed by it), but
each stream also refs the server it is connected to. This cyclic
dependency can result in weird situations: when one is
destroyed/unlinked/stopped it needs to unregister itself from the other,
but doing this will trigger unregistration of the other. Hence, let's
make sure we unregister the stream from the server before destroying it,
to break this cycle.
Most likely fixes: #10725
We register an on_packet() handler anyway, which is called first.
There's hence no need to check in on_stream_complete() again, as it is
already taken by that time.
Let's not name a variable of type ssize_t "r". We usually use "r" for
return values of API calls that return some kind of error as in int.
This creates a lot of confusion if used differently here, which actually
resulted in connect()'s return value being assigned to this mistyped "r"
by accident.
Let's rename the variable "m" hence, and not use it for connect() return
values.
This provides us with an easy command line to test this script. Because
the test was so difficult to get running noone ever did, hence it broke
badly quickly. Let's fix that.
Previously, the test would use the existing static hostname. However,
this woud not work as expected in the static hostname was "localhost"
because the transient hostname will override the static one in that case
anyway, as the assumption hostnamed makes is that "localhost" is a
non-initialized hostname.
Hence when testing this, let's first set the static hostname to
something specific first (that is not "localhost").
Otherwise networkd isn't happy.
Let's also make addition of the "systemd-network" non-fatal. The user
exists on many machines anyway, hence it shouldn't fail if it already
exists.
https://bugzilla.redhat.com/show_bug.cgi?id=1656639
Using "--" is a trick that is hard to discover. Let's give users a hint:
$ build/systemctl status -.service
build/systemctl: invalid option -- '.'
Hint: to specify units starting with a dash, use "--":
build/systemctl [OPTIONS...] {COMMAND} -- -.service ...
I use program_invocation_name because that's what getopt seems to use.
"::" is used in the option string so that getopt doesn't complain about
a missing argument in case somebody passes "-." as the argument. After all
"." is not a real option.
Lennart Poettering
Evgeny Vereshchagin
Zbigniew Jędrzejewski-Szmek
Filipe Brandenburger
Yu Watanabe