Is there a way to implement two pipes continuously in a c program using fork and exec?

Question

What I mean is, can I use fork() and exec() to implement calls like: ls -l | wc | wc , where I have used 2 pipes.

Call `pipe` twice to set up the two pipes, call `fork` three times, connect all the pipes to the appropriate `stdin` and `stdout` with `dup2`, and then `exec` the programs. — Barmar, Sep 17 '15 at 21:19

score 0 · Answer 1 · edited May 23 '17 at 11:58

0

You'll have to chain your forks and execs see here for an example of pipe chaining.

You'll have to use dup(2) to duplicate the stdout of one process to the stdin of the next process in the chain.

edited May 23 '17 at 11:58

Community

answered Sep 17 '15 at 21:21

asdf

If you're just going to refer him to another question, vote to close as a duplicatae. – Barmar Sep 17 '15 at 21:22
@Barmar was in the process of doing that as this comment popped up – asdf Sep 17 '15 at 21:22

1 Answers1