POLLNVAL           27 maint/gnulib/tests/test-poll-h.c int b = POLLIN | POLLPRI | POLLOUT | POLLERR | POLLHUP | POLLNVAL
POLLNVAL          170 maint/gnulib/tests/test-poll.c   if (pfd.revents & ~(POLLHUP | POLLERR | POLLNVAL | ev))