readv
pfd.events = f == readv ? POLLIN : POLLOUT;
varpush(inf, readv);
if (func == readv) {
bytes = readv(fd, str->iovCur, str->iovCurCount);
len = readv(ss->s, iov, sizeof(iov)/sizeof(iov[0]));
int readv(int, struct iovec *, int);
__strong_reference(__readv, readv);
struct readv_args readv;
ssize_t readv(int, const struct iovec *, int);
if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) {