pw_copyx
int pw_copyx(int, int, struct passwd *, struct passwd *,
if (pw_copyx(pfd, tfd, pwd, opwd, errbuf, sizeof(errbuf)) == 0) {
__warn_references(pw_copyx,
int pw_copyx(int, int, struct passwd50 *, struct passwd50 *,
rv = pw_copyx(ffd, tfd, pw, old_pw, errbuf, sizeof(errbuf));