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This simplifies the use of tempfiles in tests and fixes "leaked"
temporary files in test-fileio, test-catalog, test-conf-parser.
Not the whole tree is converted.
tmpfiles.d relies on merging lines for the same file paths, as well as
detecting conflicts between lines for the same file paths. /var/run is a
prominent case that is an alias for /run, any many tmpfiles snippets
refer to paths in /var/run rather than /run currently, which breaks the
conflict detection and merging.
We can't really fix this comprehensively, as doing so would require us
to resolve symlinks early on, but that's precisely not what we want to
do, as tmpfiles is usually run very early on where the paths might not
be fully available yet (in particular as we might likely create them
ourselves).
Hence, let's at least detect and fix this case for the most prominent
case of this ambiguity, and also log explicitly about this, asking users
to fix the snippets in question so that the merging and conflict
detection works properly again.
This directory is used by the DynamicUer= stuff when used in combination
with StateDirectory=/LogDirectory=/CacheDirectory=. Let's make sure the
dir exists early on with the right perms. This is not strictly necessary
as we'll also create the dir on demand if it is missing, but in the
interest of grabbing the name early on, and making things more explicit
let's also list this in a tmpfiles.d/ snippet.
Let's separate the loading of the settings object and the merging into
our arg_xyz fields into two.
This will become particularly useful when we eventually are able to load
settings from OCI runtime files in addition to .nspawn files.
Similar as the other options added before, this is primarily useful to
provide comprehensive OCI runtime compatbility, but might be useful
otherwise, too.
And port config_parse_exec_oom_score_adjust() over to use it.
While we are at it, let's also fix config_parse_exec_oom_score_adjust()
to accept an empty string for turning off OOM score adjustments set
earlier.
This simply controls the PR_SET_NO_NEW_PRIVS flag for the container.
This too is primarily relevant to provide OCI runtime compaitiblity, but
might have other uses too, in particular as it nicely complements the
existing --capability= and --drop-capability= flags.
Previously, the container's hostname was exclusively initialized from
the machine name configured with --machine=, i.e. the internal name and
the external name used for and by the container was synchronized. This
adds a new option --hostname= that optionally allows the internal name
to deviate from the external name.
This new option is mainly useful to ultimately implement the OCI runtime
spec directly in nspawn, but it might be useful on its own for some
other usecases too.
This ensures we set the various resource limits of our container
explicitly on each invocation so that we inherit less from our callers
into the payload.
By default resource limits are now set to the same values Linux
generally passes to the host PID 1, thus minimizing needless differences
between host and container environments.
The limits are now also configurable using a new --rlimit= switch. This
is preparation for teaching nspawn native OCI runtime support as OCI
permits setting resource limits for container payloads, and it hence
probably makes sense if we do too.
POSIX doesn't declare too clearly how RLIM_INFINITY is set. Let's hence
filter it out explicitly early on, just as safety precaution should it
be defined weirdly on some arch, for example negative or below the
maximum value of the rlim_t type.
That way we can use it in nspawn.
Also, while we are at it, let's rename the call config_parse_rlimit(),
i.e. insert the "r", to clarify what kind of limit this is about.
Configuration through environment variable is inconvenient with meson, because
they cannot be convieniently changed and/or are not preserved during
reconfiguration (https://github.com/mesonbuild/meson/issues/1503).
This adds -Dvalgrind=true/false, which has the advantage that it can be set
at any time with meson configure -Dvalgrind=... and ninja will rebuild targets
as necessary. Additional minor advantages are better consistency with the
options for hashmap debugging, and typo avoidance with '#if' instead of '#ifdef'.
What the man page said was different than what the code did.
save_external_coredump() will store the core temporarily for backtrace
generation, and will delete if afterwards if it is too large. So to disable
processing, it's necessary to both set
Storage=none/Storage=journal+JournalSizeMax=0/Storage=external+ExternalSizeMax=0
and ProcessSizeMax=0. This updates the man page to reflect the code.
The man pages are extended to describe that Storage=none + ProcessSizeMax=0 is
the simplest way to disable coredump processing. All the storage and processing
options make this quite complicated, so let's add a copy-and-pasteable example
of how to disable coredump. Doing it through coredump.conf has the advantage
that we still log, and the effect is immediate, unlike masking the sysconf
file.
Fixes#8788.
If messages are wrapped, then only the last line is shown in the
dialog, at least polkit gui for Xfce. It may be a bug of polkit or
Xfce. But it is not necessary to wrap the message in the policy
file. So, let's fix them.
LUKS2 header supports to device label and blkid since 2.32 version
already supports this option.
Persistent udev storage rules should create symlink for this label.
For older devices this value is not set so changed rule should be compatible.
