Pipe external process's output into running C++ script

Question

I am making a simple bash terminal with the SFML framework for C++. I understand how to begin an external process with the system() fn, but I need a way to stream a child process's output into the current script. Is there a simple way to do this? Perhaps using an fstream hack? I am using Unix.

Which OS? There's popen on linux that might do what you want — vmpstr
– vmpstr, Commented Mar 1, 2012 at 21:01
@DejanLekic I'd rather be safe than sorry :) All I can claim is that it's on my linux OS, but thanks for the correction! — vmpstr
– vmpstr, Commented Mar 1, 2012 at 21:08

foxx1337 · Accepted Answer · 2012-03-01 22:27:53Z

2

You need to use pipe()s - . The basic idea is to fork() then to dup2() the file descriptors 0 (stdin), 1 (stdout) and, respectively, 2 (stderr) into the specific pipes and then to waitpid() in your "main" branch of the fork until you get an WIFEXITED on the "child" branch.

answered Mar 1, 2012 at 22:27

foxx1337

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