RD_PIPE
POOL_LEV_DPRINTF(4, ("PIPE r=[%d] w=[%d]", RD_PIPE, WR_PIPE));
pfd[nfd].fd = RD_PIPE;
if (WAIT_FD(i) == RD_PIPE)
r = read(RD_PIPE, &evt, sizeof(evt));
i, RD_PIPE, r, evt));