[HACKERS] Name type in postgres

[mohsen soodkhah mohammadi]

hello.
I want do understand that did can we have name without null-terminator?
in src/backend/util/adt/name.c in nameout() function is:
Name        s = PG_GETARG_NAME(0);
PG_RETURN_CSTRING(pstrdup(NameStr(*s)));
what do the pstrdup() function?
do this function create string from name with null-terminate?