in reply to Comparing close-on-exec behaviour between Unix and Windows

tye's Win32API::File contains all the code that is needed to implement this particular piece of the panopoly of fcntl() functionality. Namely FdGetOsFHandle() to gain access to the native filehandle, and SetHandleInformation() to set/clear the inheritability flag on that handle.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In Section Seekers of Perl Wisdom