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If we encounter an error in proc cmdline parsing, just treat that as permanent,
i.e. the same as if the option was not specified. Realistically, it is better
to use the same condition for all related mounts, then to have e.g.
/sys/fs/cgroup mounted and /sys/fs/cgroup/unified not. If we find something is
mounted and base our answer on that, cache that result too.
Fix the conditions so that if "unified" is used, make sure any "hybrid" mounts
are not mounted.
This updates the man page for the changes introduced in 1d84ad944520fc3e062ef518c4db4e1d3a1866af.
"=" is kep if the option is predominantly used with an argument, and dropped
otherwise.
v2:
- update also description of log_color
- drop '=' in all cases where it is optional
(previous rule of dropping it only in some cases was just too arbitrary.)
We need this to gracefully support older or strangely configured kernels.
v2:
- do not install a callback handler, just embed the right conditions into
cg_is_*_wanted()
v3:
- fix bug in cg_is_legacy_wanted()
It is expected that general-purpose distributions might want to override this.
This commit is made separate from grandparent to make it easy to revert if
needed.
v2:
- use hybrid as the default
(We tested that the default of unified seems boot correctly everywhere and behave
correctly in general, but it is incompatible with docker/lxc and probably some
other tools, so for now we default to hybrid. The new "hybrid" mode should work
be OK for those tools.)
Fixes#4669.
Apparently if people are adventurous enought to run Go programs in udev
rules they might run into problems with MemoryDenyWriteExecute=.
I am pretty sure the best way out is for the toolchain generating
programs incompatible with W^X to be fixed, but this still deserves
documentation.
This was forgotten for the 232 release, hence add it now, retroactively.
See: #5400
As per commit 25e773e "udev: switch to systemd logging functions"
Now log_set_max_level() in udev_new() overwites system wide log level.
Propagate the udev.conf setting to log_set_max_level()
only if udev_new() is called from within udevd or one of its helpers.
Introduce a UDEV_PROPAGATE_LOG macro that we set with -D on
the gcc command line for all udev binaries we build, but not
for any others. The log_set_max_level() call is guarded by an
ifdef check for that macro, so that it only effects the various
udev binaries.
closes: #4525
If the snippet aleady exists, don't do anything, as the file was already
installed then.
(This also reworks the code to create the file atomically)
Fixes: #5396
If our netlink input buffer overruns the kernel will send us ENOBUFS on
the next recvmsg(). Don't consider this a complete failure resulting in
closing of the netlink socket. Instead, simply continue (after debug
logging).
Of course, ideally we'd have a better strategy for this, and would have
a way to resync if this happens (as well as a scheme for cancelling all
ongoing asynchronous transactions), but for now let's at least not choke
fatally, and simply accept that we lost some messages and continue.
Note that if we lose messages when synchronously waiting for an
operation to complete, we'll still propagate the ENOBUFS up, to make the
individual transaction fail.
See: #5398
(This bug does not properly fix the issue, hence we should leave the bug
open.)
IN_SET(SIGCONT, SIGKILL) will always evaluate to false.
The signal needs to be included as the first argument.
Fixup for 26f417d3e8dd2522adfdc4c8fed4c36fa40f48fc.
