_PATH_UTMP
#ifndef _PATH_UTMP
utmpname(_PATH_UTMP);
if (ttyno > 0 && (fd = open(_PATH_UTMP, O_WRONLY, 0)) >= 0) {
#ifdef _PATH_UTMP
#define UTMP_FILE _PATH_UTMP
# ifdef _PATH_UTMP
# define UTMP_FILE _PATH_UTMP