The file descriptors may be being closed on exec. See fcntl(2) and Fcntl, specifically the FD_CLOEXEC flag.

The normal way to do this is as frodo72 describes: dup the pipe FDs to the child's STDIN and STDOUT. You may still have to turn off FD_CLOEXEC on them; at any rate it's probably safest and most portable.


--
sgifford's Web page

In reply to Re: How to hook up C's socketpair() with Perl's? by sgifford
in thread How to hook up C's socketpair() with Perl's? by mhutch7714

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