_PWF_UID
if (src->pw_fields & _PWF_UID)
COPY(pw_uid, _PWF_UID);
pw->pw_fields |= _PWF_UID;
fields &= ~_PWF_UID;
#define PW_UID _PWF_UID
pwd.pw_name, pwd.pw_fields & _PWF_UID ? uidstr : "",
yp_password.pw_fields |= _PWF_UID;