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In PR #17431 we have introduced retry loop in link_update() in order to
maximize the chance that we end up with correct target when there are
multiple contenders for given symlink.
Number of iterations in retry loop is either 1 or
LINK_UPDATE_MAX_RETRIES, depending on the value of 'initialized' db
flag. When device appears for the first time we need to set the
flag before calling link_update() via update_devnode() for the second
time to make sure we run the second invocation with higher retry loop
counter.
When running integration tests under sanitizers D-Bus fails to
shutdown cleanly, causing unnecessary noise in the logs:
```
dbus-daemon[272]: ==272==LeakSanitizer has encountered a fatal error.
dbus-daemon[272]: ==272==HINT: For debugging, try setting environment variable LSAN_OPTIONS=verbosity=1:log_threads=1
dbus-daemon[272]: ==272==HINT: LeakSanitizer does not work under ptrace (strace, gdb, etc)
```
Since we're not "sanitizing" D-Bus anyway let's disable LSan's at_exit
check for the dbus.service to get rid of this error.
NULLSTR_FOREACH expects two terminating NULs, but the joined string
for extension-release.d only had the canonical one.
Use a placeholder when joining and fix it manually.
Given these files are part of procfs, let's use the correct API calls
for reading them.
This changes one occasion of read_one_line_file() to
read_full_virtual_file(), which superficially is a different thing, but
shouldn't actually be a difference, since sysctls can't be longer than
4K anyway, and the piecemeal logic behind read_one_line_file() cannot
work with the special semantics of procfs anyway.
It's so similar to copy_access(), hence let's move it over and rename it
in similar style to the rest of the functions.
No change in behaviour, just moving things over.
This reverts behaviour of systemd-run's unit name generation to the
status quo ante of #18871: we chop off the ":1." prefix if we can.
However, to address the issue that the unique name can overrun we then
do what #18871 did as fallback: only chop off the ":" prefix.
This way we should have pretty names that look like they always looked
in the common case, but in the case of a unique name overrun we still
will have names that work.
Follow-up for #18871
REMOVE_CHMOD is necessary to remove files/dirs that are owned by us but
have an access mode that would not allow us to remove them. In generic
destructor calls for use with `_cleanup_` that are "fire-and-forget"
style we should make use of that, to maximize the chance we can actually
remove the files/dirs.
(Also, add in REMOVE_MISSING_OK. Just because prettier, we ignore the
return codes anyway, but it' a bit nicer to ignore a bit fewer errors.)
In https://bugzilla.redhat.com/show_bug.cgi?id=1933873 a keymap was set without
the package that provides it being installed (it2 is in kbd-legacy, which is
not installed by default). Setting a non-installed keymap is problematic,
because it results in nasty failures afterward (*). So let's to the same as
e.g. for locale data, and refuse a setting if the definition doesn't exists in
the filesystem.
The implementation using nftw() is not the most efficient, but I think it's OK
in this case. This is definitely not in any kind of hot path, and I prefer not
to duplicate the filename manipulation logic in a second function.
(*) If the keymap is not found, vconsole-setup.service will fail.
dracut-cmdline-ask.service has Requires=vconsole-setup.service, so it will also
fail, and this breaks boot. dracut-cmdline-ask.service having a hard dependency
is appropriate though: we sadly don't display what the keymap is, and with a wrong
keymap, any attempts to enter a password are likely to fail.
