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The idea is that we have strvs like list of server names or addresses, where
the majority of strings is rather short, but some are long and there can
potentially be many strings. So formattting them either all on one line or all
in separate lines leads to output that is either hard to read or uses way too
many rows. We want to wrap them, but relying on the pager to do the wrapping is
not nice. Normal text has a lot of redundancy, so when the pager wraps a line
in the middle of a word the read can understand what is going on without any
trouble. But for a high-density zero-redundancy text like an IP address it is
much nicer to wrap between words. This also makes c&p easier.
This adds a variant of TABLE_STRV which is wrapped on output (with line breaks
inserted between different strv entries).
The change table_print() is quite ugly. A second pass is added to re-calculate
column widths. Since column size is now "soft", i.e. it can adjust based on
available columns, we need to two passes:
- first we figure out how much space we want
- in the second pass we figure out what the actual wrapped columns
widths will be.
To avoid unnessary work, the second pass is only done when we actually have
wrappable fields.
A test is added in test-format-table.
The status string is modeled after our --version output: +enabled -disabled equals=more-info
For example:
Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=allow-downgrade/supported
We would print the whole string as a single super-long line. Let's nicely
break the text into lines that fit on the screen.
$ COLUMNS=70 build/resolvectl --no-pager nta
Global: home local intranet 23.172.in-addr.arpa lan
18.172.in-addr.arpa 16.172.in-addr.arpa 19.172.in-addr.arpa
25.172.in-addr.arpa 21.172.in-addr.arpa d.f.ip6.arpa
20.172.in-addr.arpa 30.172.in-addr.arpa 17.172.in-addr.arpa
internal 168.192.in-addr.arpa 28.172.in-addr.arpa
22.172.in-addr.arpa 24.172.in-addr.arpa 26.172.in-addr.arpa
corp 10.in-addr.arpa private 29.172.in-addr.arpa test
27.172.in-addr.arpa 31.172.in-addr.arpa
Link 2 (hub0):
Link 4 (enp0s31f6):
Link 5 (wlp4s0):
Link 7 (virbr0): adsfasdfasdfasd.com 21.172.in-addr.arpa lan j b
a.com home d.f.ip6.arpa b.com local 16.172.in-addr.arpa
19.172.in-addr.arpa 18.172.in-addr.arpa 25.172.in-addr.arpa
20.172.in-addr.arpa k i h 23.172.in-addr.arpa
168.192.in-addr.arpa d g intranet 17.172.in-addr.arpa c e.com
30.172.in-addr.arpa a f d.com e internal
Link 8 (virbr0-nic):
Link 9 (vnet0):
Link 10 (vb-rawhide):
Link 15 (wwp0s20f0u2i12):
It makes sense to ignore all the common fields that are expected and
that we can safely ignore. Note that it is fine to ignore URL as we will
already warn about the type= being wrong in that case.
Closes: #17276
This helper alone doesn't make too much sense, but it's preparatory work
for #17274, and I guess it can't hurt to land it early, it does make the
ratelimit code a tiny bit prettier after all.
This is just some refactoring: shifting around of code, not change in
codeflow.
This splits up the way too huge systemctl.c in multiple more easily
digestable files. It roughly follows the rule that each family of verbs
gets its own .c/.h file pair, and so do all the compat executable names
we support. Plus three extra files for sysv compat (which existed before
already, but I renamed slightly, to get the systemctl- prefix lik
everything else), a -util file with generic stuff everything uses, and a
-logind file with everything that talks directly to logind instead of
PID1.
systemctl is still a bit too complex for my taste, but I think this way
itc omes in a more digestable bits at least.
No change of behaviour, just reshuffling of some code.
It's an auxiliary function to the UnitInfo structures, and very generic.
Let's hence move it over to the other code operating with UnitInfo, even
if it's not used by code outside of systemctl (yet).
We have an option to set the fallback list, so we don't know what the contents
are. It may in fact be empty. Let's add some examples to make it easy for a user
stranded without any DNS to fill in something that would work. As a bonus, this
also gives names to the entries we provide by default.
(I added google and cloudflare because that's what we have currently, and quad9
because it seems to be a good privacy-concious and fast choice and was requested
in #12499. As a minimum, things we should include should be well-known global
services with a documented privacy policy and both IPv4 and IPv6 support and
decent response times.)
