F_PIPE
(f->f_type != F_PIPE && f->f_type != F_FORWUDP &&
case F_PIPE:
case F_PIPE:
if (e == EAGAIN && f->f_type == F_PIPE) {
f->f_type != F_FILE && f->f_type != F_PIPE &&
f->f_type == F_PIPE && !retryonce) {
case F_PIPE:
case F_PIPE:
case F_PIPE:
f->f_type = F_PIPE;