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If a root directory is specified, and e.g. /var under the root directory
is a symlink to the host's /var, then we wrongly read host's machine ID,
even if O_NOFOLLOW is set.
Let's chase the path with CHASE_NOFOLLOW to refuse such case.
Also, refuse null ID, otherwise we may setup machine ID with NULL.
Previously, when the NULL (all zero) machine ID is configured in the
container, nspawn refused to execute.
Now id128_get_machine() is used, so NULL machine ID is refused with
-ENOMEDIUM, and fallback to specified UUID or randomly generated one.
I was testing transient units and user@.service crashed. I restarted it, and
tried to create a transient unit. It failed because
/run/user/1000/systemd/transient/ remained after the previous aborted run:
Failed to start transient service unit: Unit run-u0.service was already loaded or has a fragment file.
Remove the directory during initial startup so we don't get confused by our own
files.
I was changing how some properties are appended to the StartTransientUnit call
and messed up the message contents. When something is wrong with how the
message is structed, we would return a very generic
"Failed to start transient service unit: No such device or address".
Mention that it was property setting that failed, and translate ENXIO to a
different message. bus_unit_set_properties() or any of the children it calls
may also return other errors, in particular EBADMSG or ENOMEM, but the error
message that is generated for those is understandable, so we don't need to
"translate" them explicitly.
bus_unit_set_properties() is called from two places, so it seems nicer to
generate the message internally, rather than ask the caller to do that. Also,
now bus_unit_set_properties() always sets <error>, which is nicer for the
callers.
The description was split — part was under ExecStart= and part in "Command lines".
Now the whole generic part is moved to the separate section, and under ExecStart=
only the stuff that is specific to that option is described.
This just moves the text and removes some repetitions.
After 'if (DEBUG_LOGGING)' is added, the two call sites are almost identical,
except that we forgot LOG_UNIT_INVOCATION_ID(unit).
I removed the handling of the log_oom(). It's a debug message only after all,
and it's unlikely to fail.
The function had a provision for NULL input, and would return NULL, but that
looks like an error and all callers pass in a non-NULL arg and report oom on
NULL. So assert that the input is non-NULL.
All callers specifed the output buffer, so we can simplify the logic to only
make an allocation if appropriate and change the return type to 'const *'.
No functional change.
Fixes RHBZ#2183546 (https://bugzilla.redhat.com/show_bug.cgi?id=2183546).
Previously, journal file is always compressed with the default algorithm
set at compile time. So, if a newer algorithm is used, journal files
cannot be read by older version of journalctl that does not support the
algorithm.
Co-authored-by: Colin Walters <walters@verbum.org>
