pw_copy
void pw_copy(int, int, struct passwd *, struct passwd *)
__warn_references(pw_copy,
void pw_copy(int, int, struct passwd50 *, struct passwd50 *);
pw_copy(pfd, tfd, pw, (op == LOADENTRY) ? NULL : &old_pw);
pw_copy(pfd, tfd, pw, &old_pw);
pw_copy(pfd, tfd, pw, &old_pw);
pw_copy(pfd, tfd, &pw, NULL);