POLLRDBAND
POLLRDNORM | POLLRDBAND;
if (pfd->events & (POLLPRI | POLLRDBAND))
if (pfd->events & (POLLPRI | POLLRDBAND)) {
if (pfd->events & POLLRDBAND)
pfd->revents |= POLLRDBAND;
#define POLLSTANDARD (POLLIN|POLLPRI|POLLOUT|POLLRDNORM|POLLRDBAND|\
#define MASKVAL (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)
#define POLLPIPE (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)