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Instead of comparing strings everywhere, let's use the new enum. This
allows us to drop sleep_settings(), since the operation enum can be
directly used as index into the config settings.
Some minor other refactoring is done, but mostly just shifting thing
around a bit, no actual change in behaviour.
Since d8f9686c0f we use the chattr +i flag
for marking containers in directories as reead-only. But to do so we
need the cap for it, hence grant it.
Fixes: #19115
I'm working on building initramfs images directly from normal packages, and it
doesn't make sense for those units to be started. Pristine system rpms need to
behave correctly as much as possible also in the initrd, and those units are
enabled by the rpms. There usually isn't enough time for the timer to actually
fire, but starting it gives a line on the console and generally looks confusing
and sloppy. Flushing the journal means that its actually lost, since the real
/var is not available yet.
Another approach would be not enable those units, but right now they are
statically enabled, and changing that would be more work, and doesn't really
seem necessary, since the condition checks are very quick.
Checking for /etc/initrd-release is the standard condition that the initrd
units use, so let's do the same here.
Previously we'd pass all return values of read_virtual_file() to
log_info_errno() as error, but that makes no sense, given that we
sometimes return positive one with means "not truncated" but we'd show
as "Permission denied. Let's fix this, and log differently for sucess
and error.
This reverts a major part of: e17c95af8e
Using format strings for concatenating strings is pretty unefficient,
and using PATH_MAX buffers unpretty as well. Let's revert to using
strjoina() as before.
However, to fix the fuzz issue at hand, let's explicitly verify the two
input strings ensuring they are valid path names. This includes a length
check (to 2K each), thus making things prettier, faster and using less
memory again.
This is also not entirely obvious. I think the code I came
up with is pretty elegant ;] The final part of of the code that makes
use of the parsed data is kept very similar to the shell code on purpose,
even though it could be written a bit more idiomatically.
Let's order the fields from the most general to least: os name, os variant, os
version, machine-parseable version details, metadata, special settings. I added
section headers to roughly group the settings. The division is not strict,
because for example CPE_NAME also includes the version, and PRETTY_NAME may
too, but it still makes it easier to find the right name.
Also split out Examples to separate paragraphs:
almost all descriptions had "Example:" at the end, where multiple
examples were listed. Splitting this out to separate paragraphs
makes the whole thing much easier to read.
Add missing markup and punctuation while at it.
About
- If not set, defaults to <literal>NAME=Linux</literal>.
+ If not set, a default of <literal>NAME=Linux</literal> may be used.
and similar changes: in many circumstances, if this is not set, no value should
be used. The fallback mostly make sense when we need to present something to the
user. So let's reword this to not imply that the default is necessary.
The kernel can be compiled without support for any memory.swap.* files, or
it can be disabled at boot time with the 'swapaccount=0' boot parameter,
so if the file doesn't exist log warning indicating the kernel doesn't
support the file and the user may need to try using the 'swapaccount=1'
boot param.
Note that the actual error from the call to fopen() is ENOENT, but
that is translated into ENODATA in cg_get_attribute_as_uint64()
The kernel still provides the /proc and cgroup pressure files even
if its psi support is disabled, so we need to actually read the files
to verify they don't return -EOPNOTSUPP
These macros will log a message at the specified level only the first time
they are called. On all later calls, if the specified level is debug, the
logs will be suppressed; otherwise the message will be logged at debug.
Every location that this macro is used, it will be true the first
time it's checked, then false each time after that.
This can be useful for things such as one-time logging.
