When showing logs from a container, we would fail to show various lines:
Oct 29 09:50:51 krowka systemd-nspawn[61376]: Detected architecture x86-64.
Oct 29 09:50:51 krowka systemd-nspawn[61376]: [1B blob data]
Oct 29 09:50:51 krowka systemd-nspawn[61376]: Welcome to Fedora 32 (Rawhide)!
Oct 29 09:50:51 krowka systemd-nspawn[61376]: [1B blob data]
Those are only harmless \r characters that trail the line. We already replace
tabs and strip various ansi characters that we deem inconsequential, so let's
also strip trailing carriage returns. Non-trailing ones are different, because
they change what would be displayed.
These lines are generally out-of-date, incomplete and unnecessary. With
SPDX and git repository much more accurate and fine grained information
about licensing and authorship is available, hence let's drop the
per-file copyright notice. Of course, removing copyright lines of others
is problematic, hence this commit only removes my own lines and leaves
all others untouched. It might be nicer if sooner or later those could
go away too, making git the only and accurate source of authorship
information.
This part of the copyright blurb stems from the GPL use recommendations:
https://www.gnu.org/licenses/gpl-howto.en.html
The concept appears to originate in times where version control was per
file, instead of per tree, and was a way to glue the files together.
Ultimately, we nowadays don't live in that world anymore, and this
information is entirely useless anyway, as people are very welcome to
copy these files into any projects they like, and they shouldn't have to
change bits that are part of our copyright header for that.
hence, let's just get rid of this old cruft, and shorten our codebase a
bit.
With the recent terminal_urlify() APIs we'll now sometimes generate
clickable link CSO sequences. Hence we should also be able to remove
them again from strings. This beefs up the logic to do so.
Follow-up for: 23b27b39d2
Files which are installed as-is (any .service and other unit files, .conf
files, .policy files, etc), are left as is. My assumption is that SPDX
identifiers are not yet that well known, so it's better to retain the
extended header to avoid any doubt.
I also kept any copyright lines. We can probably remove them, but it'd nice to
obtain explicit acks from all involved authors before doing that.
Red is used for highligting, the same as grep does. Except when the line is
highlighted red already, because it has high priority, in which case plain ansi
highlight is used for the matched substring.
Coloring is implemented for short and cat outputs, and not for other types.
I guess we could also add it for verbose output in the future.
There are more than enough calls doing string manipulations to deserve
its own files, hence do something about it.
This patch also sorts the #include blocks of all files that needed to be
updated, according to the sorting suggestions from CODING_STYLE. Since
pretty much every file needs our string manipulation functions this
effectively means that most files have sorted #include blocks now.
Also touches a few unrelated include files.
Let's underline the header line of the table shown by cgtop, how it is
customary for tables. In order to do this, let's introduce new ANSI
underline macros, and clean up the existing ones as side effect.
