get_pretty_hostname() so far had semantics not in line with our usual
ones: the return parameter was actually freed before the return string
written into it, because that's what parse_env_file() does. Moreover,
when the value was not set it would return NULL but succeed.
Let's normalize this, and only fill in the return value if there's
something set, and never read from it, like we usually do with return
parameter, and in particular those named "ret_xyz".
The existing callers don't really care about the differences, but it's
nicer to normalize behaviour to minimize surprises.
so the CLI interface is now similar to `systemctl`, i.e. if no unit name
suffix is provided, assume `.service`.
Fixes: #20492
Before:
```
$ systemd-cgls --unit user@1000
Failed to query unit control group path: Invalid argument
Failed to list cgroup tree: Invalid argument
```
After:
```
$ build/systemd-cgls --unit user@1000
Unit user@1000.service (/user.slice/user-1000.slice/user@1000.service):
├─session.slice (#4939)
│ ├─pipewire-pulse.service (#5203)
│ │ └─7711 /usr/bin/pipewire-pulse
...
```
Unprivileged overlayfs is supported since Linux 5.11. The only
change needed to get ExtensionDirectories to work is to avoid
hard-coding the staging directory to the system manager runtime
directory, everything else just works (TM).
This mirrors a similar check in Linux kernel 5.16
(9dcc38e2813e0cd3b195940c98b181ce6ede8f20) that raised the
RLIMIT_MEMLOCK to 8M.
This change does two things: raise the default limit for nspawn
containers (where we try to mimic closely what the kernel does), and
bump it when running on old kernels which still have the lower setting.
Fixes: #16300
See: https://lwn.net/Articles/876288/
The first ExecStartPre or the first ExecStart commands would get the metadata,
but not the subsequent ones. Also check that we do not pass it in
ExecStartPost.
This fixes the following case:
OnFailure= would be spawned correctly, but OnSuccess= would be
spawned without the MONITOR_* metadata, because we'd "collect" the unit
that started successfully. So let's block cleanup while we have a job
running for the handler. The job cannot last infinitely, so at some point
we'll be able to collect both.
We already logged what we are spawning, but not so much why. Let's
add this, so it's easier to distinguish execstartpre/execstart/execstartpost
and such.
The test would fail when the the same handler was used for multiple
*failing* units. We need to call 'reset-failed' to let the manager forget
about the earlier ones.
systemd-analyze log-target console is removed, because it's easier to follow
the logs if logging it to the journal.
