strlcpy, often touted as a replacement, does not elicit the padding behavior but has another flaw: It is supposed to return the length of the string it tried to create, for example, so the user can call realloc without calling strlen again.[3] However, this final "strlen-tail" in strlcpy isn't bounded by the size parameter which describes dest, not src.
While strscpy is a marked improvement, there is still something to be careful about: It can read past the end of the src-buffer, when sizeof src < sizeof dest and src is not nul-terminated.[4] (Set the count argument to something like min(sizeof dest, sizeof src) to avoid that).
--
[1] - https://softwareengineering.stackexchange.com/a/438090
[2] - https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3220.pdf, 7.26.2.5 p. 3
[3] - https://manpages.debian.org/jessie/libbsd-dev/strlcpy.3.en.h...
[4] - https://manpages.debian.org/testing/linux-manual-4.8/strscpy...