vtnr_from_tty     516 src/login/logind-dbus.c                 v = vtnr_from_tty(tty);
vtnr_from_tty    3764 src/shared/util.c         return vtnr_from_tty(tty) >= 0;
vtnr_from_tty     524 src/shared/util.h int vtnr_from_tty(const char *tty);