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.
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.
When vsnprintf() truncated output, dest was advanced by the entire
size of dest leaving it just past the end. Then the fall-through \0
termination scribbled one past the end. The explicit null termination
is not necessary since vsnprintf() always includes the terminator even
when truncated.
Additionally these functions encourage calling with zero-length sizes,
while assuming non-zero sizes with potential buffer overflows.
Simply short-circuit the relevant functions when size == 0.
Fixes https://github.com/systemd/systemd/issues/6252
Lennart Poettering