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Date: Mon, 28 Mar 2016 16:19:45 +0000
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To: Grzegorz Zdanowski <grzegorz129@gmail.com>
Cc: PHP internals list <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Handling "Bad file descriptor" during stream_select()
From: danack@basereality.com (Dan Ackroyd)

On 28 March 2016 at 02:57, Grzegorz Zdanowski <grzegorz129@gmail.com> wrote=
:
> Hello!
>
>  by =E2=80=9Egone away=E2=80=9C
> I mean some underlying error like forceful close of FD and not a
> standard disconnection
> of the client.

What problem exactly are you trying to solve, and do you have a way of
showing the problem that isn't just what looks like a programming
mistake?

e.g. The following code works fine. The file being closed doesn't
affect the filehandle

$fileHandle =3D fopen('foo.txt', 'r+');
unlink('foo.txt');
$data =3D fread($fileHandle, 20);

The following code doesn't work fine. The filehandle being closed,
surprisingly enough, makes it not usable any more:

$fileHandle =3D fopen('foo.txt', 'r+');
fclose($fileHandle);
$data =3D fread($fileHandle, 20);

or, as the link you sent puts it:

> If a connection is closed at client side, and you call select() on the se=
rver side socket, FD_READ will be triggered and recv() will return zero, th=
en you can close the socket at server side.
>
> The "bad file descriptor" error only happens when you call API on an alre=
ady closed socket.

So I don't understand what problem you're trying to analyze, other
than closed file descriptors are closed.

cheers
Dan