How do you capture stderr, stdout, and the exit code all at once, in Perl?

Question

Is it possible to run an external process from Perl, capture its stderr, stdout AND the process exit code?

I seem to be able to do combinations of these, e.g. use backticks to get stdout, IPC::Open3 to capture outputs, and system() to get exit codes.

How do you capture stderr, stdout, and the exit code all at once?

Answer 1

If you reread the documentation for IPC::Open3, you'll see a note that you should call waitpid to reap the child process. Once you do this, the status should be available in $?. The exit value is $? >> 8. See $? in perldoc perlvar.