Imagine that you had to implement the UNIX system on an embedded system where main memory was in short supply. After a considerable amount of shoehorning, it still did not quite fit, so you picked a system call at random to sacrifice for the general good. You picked pipe, which creates the pipes used to send byte streams from one process to another. Is it still possible to implement I/O redirection somehow? What about pipelines? Discuss the problems and possible solutions.