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This addresses the comment by Lennart
https://github.com/systemd/systemd/pull/22662#discussion_r829799863:
> /sys/subsystem is preparation for a future that never came.
> And given that the main proponent of this left Linux kernel
> development (Kay), I doubt this will ever come. So maybe we
> should start dropping references to /sys/subsystem/ given it's
> unlikely to materialize anytime soon.
and devices are sorted when the iteration started.
Previously, devices added by udev_enumerate_add_syspath() ->
device_enumerator_add_device() are not sorted. This fixes the issue.
This new file is supposed to address conflicts with Fedora/Grub's
frankenbootloaderspec implementation, that squatted the /loader/entries/
dir, but place incompatible files in them (that do variable expansion?).
A simple text file /loader/entries.srel shall indicate which spec is
implemented. If it contains the string "type1\n" then the
/loader/entries/ directory implements our standard spec, otherwise
something else.
So, typically systemd-boot is referenced as sd-boot, due to te usual
shorter naming in ESP resources. systemd-stub didnt do that so far,
since it never appears as separate files in the ESP. However it's super
annoying that you can find "man sd-boot", but not the very closely
related "man sd-stub". Let's fix that, and also add an "sd-stub" alias
to the "systemd-stub" man page.
So (maybe weirdly) loader.conf(5) documents both loader.conf and type #1
entries (because they share a similar syntax). But it then only lists
the options of loader.conf. Let's add an explicit hint where to find
the documentation of the type #1 entries.
The old text was simply wrong, we used to read $layout from
/etc/kernel/install.conf and the machine ID from
$KERNEL_INSTALL_MACHINE_ID from /etc/machine-info. Correct that.
Apparently KERNEL_INSTALL_MACHINE_ID was already known back in v235
times, hence don't mention it anymore.
it's kinda weird retro-fixing these NEWS entries, given we deprecate
them again, but I couldn't let this really incorrect stuff be.
bootctl so far tried to determine the layout from /etc/machine-info, but
that's obsolete, and the kernel-install script never looked there. Let's
read the setting from /etc/kernel/install.conf instead, where
kernel-install actually looks.
Support for reading the field from /etc/machine-info is retained for
compat.
This means we'll now read /etc/machine-id, /etc/machine-info and
/etc/kernel/install.conf, and read the machine ID from the former too
and the layout setting from the latter two.
We shouldn't auto-disable event sources we create in "floating" mode.
Hence don#t use the disabling destructor for event sources.
Given that noone else has access to this event source we just allocated
anyway there's no point in explicitly disabling it before freeing it.
Follow-up for ec75e8e07a
Check if process(es) of a cgroup were killed by Kernel OOM killer
or systemd-oomd before we send the cgroup empty notification.
This allows us to show the right exit state(ServiceResult)
We so far had some magic logic in place that files we open for write
with size zero are freshly created. That of course is a bogus
assumption, in particular as this code deals with corrupted file systems
which oftentimes contain zero size inodes from left-over runs.
Let's fix this properly, and actually let the kernel tell us whether it
create the file or not.
This is a wrapper around openat(). It works mostly the same, except for
one thing: it race-freely reports whether we just created the indicated
file in case O_CREAT is passed without O_EXCL.
"""
Given an array a[N] of N elements of type T:
- Forming a pointer &a[i] (or a + i) with 0 ≤ i ≤ N is safe.
- Forming a pointer &a[i] with i < 0 or i > N causes undefined behavior.
- Dereferencing a pointer &a[i] with 0 ≤ i < N is safe.
- Dereferencing a pointer &a[i] with i < 0 or i ≥ N causes undefined behavior.
"""
As pointed by by @medhefgo, here we were forming a pointer to a[-1]. a itself
wasn't NULL, so a > 0, and a-1 was also >= 0, and this didn't seem to cause any
problems. But it's better to be formally correct, especially if we move the
code to src/fundamental/ later on and compile it differently.
Compilation shows no size change (with -O0 -g) on build/systemd, so this should
have no effect whatsoever.
With my crappy home network the test takes 29.5s usually. But with any
tiny slowdown, it goes above the 30s limit and fails. Let's bump the
timeout to avoid spurious failures.
"meson test" uses a test name generated from the file name and those long names
cause the test log output to exceed terminal width which looks bad. Let's replace
some long names with more-meaningful names that actually say something about
the tests.
These unit (if enabled) will try to update the OS in regular intervals.
Moreover, every day in the early morning this will attempt to reboot the
system if there's a newer version installed than running.
