From: Yuri Edward <yuri6037@yuristudio.net>
To: Florian Weimer <fw@deneb.enyo.de>
Cc: linux-c-programming@vger.kernel.org
Subject: Re: Issue with fcntl FD_CLOEXEC and execve
Date: Mon, 22 Jun 2020 19:09:22 +0200 [thread overview]
Message-ID: <77fb62c9-1b7f-363a-b574-477bf980e209@yuristudio.net> (raw)
In-Reply-To: <87y2og5h0h.fsf@mid.deneb.enyo.de>
Hello,
Thanks a lot for the tip; I changed my fcntl call to the following:
"fcntl(myfd, F_SETFD, FD_CLOEXEC)" and that fixed the problem.
I can now run and control external processes using the same API across
most platforms!
I wish the man pages of fcntl could have been clearer about how you were
supposed to apply the FD_CLOEXEC flag...
Yuri Edward
On 6/21/20 9:57 PM, Florian Weimer wrote:
> * 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.
next prev parent reply other threads:[~2020-06-22 17:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-19 20:40 Issue with fcntl FD_CLOEXEC and execve postmaster
2020-06-20 6:53 ` Florian Weimer
2020-06-21 18:46 ` Yuri Edward
[not found] ` <fadc7cda-a84b-33ed-e15a-8203673f9d61@yuristudio.net>
2020-06-21 19:57 ` Florian Weimer
2020-06-22 17:09 ` Yuri Edward [this message]
-- strict thread matches above, loose matches on Subject: below --
2020-06-21 19:03 Yuri Edward
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