get command output in pipe, C for Linux

Question

I need to run a Linux CLI command and get its stdout output from C.

I can use pipe() to create a pipe, then fork/exec, redirecting child\'s stdout descriptor into th

Answer 1

Use popen() and pclose().

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popen() does not actually wait, of course, but reads on the pipe will block until there is data available.

pclose() waits, but calling it prematurely could cut off some output from the forked process. You'll want to determine from the stream when the child is done...

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Possibly already discussed at How can I run an external program from C and parse its output?