Just looking at your embperl script, and assuming you copy&pasted it properly, it should fail because you have use strict enabled, but have a few variables without scope. 
Global symbol "$escmode" requires explicit package name at ./1086395.p
+l line 7.
Global symbol "%http_headers_out" requires explicit package name at ./
+1086395.pl line 8.

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It's conceivable that the cgi is trying to print this error, but it gives your bad filedescriptor error instead. Sometimes error reporting can be deceiving.

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In reply to Re: perl / embperl -- IPC::Open3; by zentara
in thread perl / embperl -- IPC::Open3; by djlerman

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