Absolutely,

That's not the only discrepancy.

https://pubs.opengroup.org/onlinepubs/9699919799/functions/m...

Note the following: "The memccpy() function does not check for the overflow of the receiving memory area." "If copying takes place between objects that overlap, the behavior is undefined."

The strxcpy he provides at the bottom doesn't look better at all. I'm not sure where the author got that function. I found some better variants of the proposed strxcpy function with bounds checks and that provides overflow detection.