SOCKETSIG_READ
ASSERT(event & (SOCKETSIG_WRITE | SOCKETSIG_READ | SOCKETSIG_URG));
if (event & SOCKETSIG_READ) {
socket_sendsig(so, SOCKETSIG_READ);
socket_sendsig(so, SOCKETSIG_WRITE|SOCKETSIG_READ);
socket_sendsig(so, SOCKETSIG_READ);
socket_sendsig(so, SOCKETSIG_READ);
*sigev |= SOCKETSIG_READ;
socket_sendsig(so, SOCKETSIG_READ);