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The header of the journal file contains a boot ID field that is
currently updated whenever we open the journal file. This is not ideal:
pretty often we want to archive a journal file, and need to open it for
that. Archiving a foreign journal file should not mark it as ours, it
should just change the status flag in the file header.
The boot ID in the header is aleady rewritten whenever we write a
journal entry to the file anyway, hence all this patch effectively does
is slightly "delay" when the boot ID in the header is updated: instead
of immediately on open it is updated on the first entry that is written.
Net effect: archived journal files don't all look like they were written
to on a boot newer then they actually were
And more importantly: the "tail_entry_monotonic" field suddenly becomes
useful, since we know which boot it belongs to. Generally, monotonic
timestamps without boot ID information are useless, and this fixes it.
A new (compatible) header flag marks file where the boot_id can be
understood this way. This can be used by code that wants to make use of
the "tail_entry_monotonic" field to ensure it actually can do so safely.
This also renames the structure definition in journal-def accordingly,
to indicate we now follow the stricter semantics for it.
In 6abe882bae the renderer was made to
unconditionally append a newline to output. This works, but is ugly. A nicer
solution is to tell jinja2 to not strip the newline in the first place, via
keep_trailing_newline=True. It seems that the result is unchanged because all
our source files have exactly one trailing newline.
Also, enable lstrip_blocks=True. This would cause whitespace on the line before
an {%if block to be automatically stripped. It seems reasonable to enable that
if trim_blocks=True.
Overall, no change is expected, though I didn't test combinations of
configurations, so there might be a change in some cases. But now the rules of
rendering are more logical, e.g. we should be able to indent nested conditional
statements without getting unexpected whitespace in the output.
We should be more careful with distinguishing the cases "all bits set in
caps mask" from "cap mask invalid". We so far mostly used UINT64_MAX for
both, which is not correct though (as it would mean
AmbientCapabilities=~0 followed by AmbientCapabilities=0) would result
in capability 63 to be set (which we don't really allow, since that
means unset).
The rest of our codebase stores caps masks in a uint64_t, and also
assumes UINT64_MAX was a suitable value for "unset mask". Hence refuse
any caps outside of 0…62.
(right now the kernel knows 40 caps, hence 22 more to go before we have
to reconsider our life's choices.)
We refuse it otherwise currently, simply because we cannot store it in a
uint64_t caps mask value anymore while retaining the ability to use
UINT64_MAX as "unset" marker.
The check actually was in place already, just one off.
r and R take globs, so let's name the argument appropriately in the tl;dr listing.
Also, use 'clean-up' in the file name where it represents the verb "clean up",
and other minor spelling adjustments.
In 6a34639e76 arg_hwdb_bin_dir was replaced by
default_hwdb_bin_dir, which is constant. Generally we'd use a #define instead,
but since there's just one use, let's just avoid the indirection altogether.
The priority of device node symlink can be negative. So the
initialization is confusing.
Fortunately, this changes no functionality, as we only compare the
priorities of symlinks only when we parsed at least one device node and
its priority.
gcov is incompatible with DynamicUser=true without additional tweaks, so
let's ignore its complaints in this test, as working around it is not
worth it (in this case).
Previously, we skip the entries before arg_lines
unconditionally, which doesn't behave correctly
when used with --grep. After this commit, when
a pattern is specified, we don't skip the entries
early, but rely on the count of the lines shown
to tell us when to stop. To achieve that we would
have to search backwards instead.
Fixes#25147
