[quietbritishjim]

Goodness me, that is a terrible name. Lower case o and c are very hard to distinguish in the middle of a word, so that looks like memcopy (yes I know the actual existing function is memcpy but memmove is more common in application-ish code, and it includes the middle "o", so I still read memccpy wrong).

What next? merncopy?

[jabl]

Admittedly the name is poor, but memccpy has been in POSIX since forever (the opengroup.org manual mentions it's from "Issue 1" which I believe refers to the X/Open Issue 1 from 1985), so I guess the C committee thought that an existing poor name was better than coming up with a new one.