From mboxrd@z Thu Jan  1 00:00:00 1970
From: Florian Weimer <fw@deneb.enyo.de>
Subject: Re: Issue with fcntl FD_CLOEXEC and execve
Date: Sun, 21 Jun 2020 21:57:18 +0200
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        Edward's message of "Sat, 20 Jun 2020 21:18:27 +0200")
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To: Yuri Edward <yuri6037@yuristudio.net>
Cc: linux-c-programming@vger.kernel.org

* Yuri Edward:

> https://github.com/BlockProject3D/Framework/blob/ProcessManagement/Base/src/Framework/System/Process.cpp 
>  > This is the main class that performs fork, pipe, read, write and 

    if (fcntl(commonfd[PIPE_WRITE], FD_CLOEXEC, 1) != 0)

That's not how fcntl works.  You need to use F_GETFD and F_SETFD to
set the FD_CLOEXEC flag.