FailureAction=/SuccessAction= were added later then StartLimitAction=, so it
was easiest to refer to the existing description. But those two settings are
somewhat simpler (they just execute the action unconditionally) while
StartLimitAction= has additional timing and burst parameters, and they are
about to take on a more prominent role, so let's move the description of
allowed values.
The service would always be in state == SERVICE_INACTIVE, but it needs to go
through state == SERVICE_START so that SuccessAction/FailureAction are executed.
Let's be safe than sorry, in particular as logind doesn't set it up
anymore, but user-runtime-dir@.service does, and logind doesn't really
track success of that.
So far we always used "yes" instead of "true" in all our unit files,
except for one outlier. Let's do this here too. No change in behaviour
whatsoever, except that it looks prettier ;-)
This heavily borrows from @intelfx' PR #5546, but watches all three
units that are associated with a user now: the slice, the user@.service
and user-runtime-dir@.service.
The logic and reasoning behind it is the same though: there's no value
in keeping lingering users around if all their three services are gone.
Replaces: #5546Fixes: #4162
Let's make this a bit prettier, and propagate unexpected access() errors
correctly.
(The callers of this function will suppress them, but it's nicer of they
do that, rather than us doing that twice in both the callers and the
callees)
This is useful so that during shutdown scope units are always terminated
before the mounts necessary for the home directory.
(Ideally we'd also add a similar dependency from the user@.service
instance to the home directory, but this isn't as easy as that service
is defined statically and not dynamically, and hence not easy to modify
dynamically, in particular when it comes to deps)
I think this is a slightly cleaner approach than parsing the
configuration file at multiple places, as this way there's only a single
reload cycle for logind.conf, and that's systemd-logind.service's
runtime.
This means that logind and dbus become a requirement of
user-runtime-dir, but given that XDG_RUNTIME_DIR is not set anyway
without logind and dbus around this isn't really any limitation.
This also simplifies linking a bit as this means user-runtime-dir
doesn't have to link against any code of logind itself.
Instead of managing it explicitly, let's simplify things and rely on
regular Wants=/Requires= dependencies to pull in these units from
user@.service and the session scope, and StopWhenUneeded= to stop these
auxiliary units again. This way, they can be pulled in easily by
unrelated units too.
This simplifies things quite a bit: for each session we now only need to
manage the session scope, and for each user the user@.service, the other
units are not something we need to manage anymore.
This patch also makes sure that if user@.service of a user is masked we
will continue to work, and user-runtime-dir@.service will still be
correctly pulled in, as it is now a dependency of the scope unit.
Fixes: #9461
Replaces: #5546
Let's propagate errors from stopping sessions via seat_stop(). This is
similar to how we propagate such errors in user_stop() for all sessions
associated with a user.
Note that we propagate these errors, but we don't abort the function.
let's make sure we log about every failure
Also, complain about systems where /dev/tty0 exists but
/sys/class/tty/tty0/active does not. Such systems (usually container
environments) are pretty broken as they mount something that is not a VC
to /dev/tty0 and they really shouldn't.
Systems should either have a VC or not, but not badly fake one by
mounting things wildly.
This just adds a warning message, as before we'll simply turn off VC
handling in this case.
Let's not use the word "wrapper", as it's not clear what that is, and in
some way any unit file is a "wrapper"... let's simply say that it's
about the runtime directory.
Previously this was serialized as part of the user object. This didn't
work however, as we load users first, and sessions seconds and hence
referencing a session from the user load logic cannot work.
Fix this by storing an IS_DISPLAY property along with each session, and
make the session with this set display session when it is loaded.
Let's update things a bit to follow current practices:
- User structure initialization rather than zero-initialized allocation
- Always propagate proper errors from allocation functions
- Use _cleanup_ for freeing objects when allocation fails half-way
- Make destructors return NULL
The term “positive” is often read to exclude 0 (though “strictly
positive” is sometimes used to clarify this), so let’s explicitly state
that --lines=0 is legal and completely disables journal output.
Motivated by an answer on StackExchange [1].
[1]: https://unix.stackexchange.com/a/475068/44049
This is actually a u16, not a u32, so the kernel complains:
kernel: netlink: 'systemd-network': attribute type 5 has an invalid length
This is due to:
if (nla_attr_len[pt->type] && attrlen != nla_attr_len[pt->type]) {
pr_warn_ratelimited("netlink: '%s': attribute type %d has an invalid length.\n",
current->comm, type);
}
Presumably this has been working fine in functionality on little-endian
systems, but nobody bothered to try on big-endian systems.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
