Bug #69963 [Fbk]: fgets reads EOF if there is nothing on the PIPE to read for a short period

From:	ab@php.net	Date:	Thu, 02 Jul 2015 20:19:47 +0000
Subject:	Bug #69963 [Fbk]: fgets reads EOF if there is nothing on the PIPE to read for a short period
References:	1	Groups:	php.bugs
Request:	Send a blank email to php-bugs+get-194087@lists.php.net to get a copy of this message

Edit report at https://bugs.php.net/bug.php?id=69963&edit=1

 ID:                 69963
 Updated by:         ab@php.net
 Reported by:        poonam dot chawla at mathworks dot com
 Summary:            fgets reads EOF if there is nothing on the PIPE to
                     read for a short period
 Status:             Feedback
 Type:               Bug
 Package:            Streams related
 Operating System:   Windows
 PHP Version:        5.6.10
 Assigned To:        ab
 Block user comment: N
 Private report:     N

 New Comment:

@poonam, this patch has landed in master, if you haven't tested yet, please take the latest
master snapshot http://windows.php.net/downloads/snaps/master/

Thanks.


Previous Comments:
------------------------------------------------------------------------
[2015-07-01 14:58:24] ab@php.net

Hi,

could you please check the build http://windows.php.net/downloads/snaps/ostc/69900/
which is linked in this mail http://news.php.net/php.internals/86976 ? Please
be aware that you'll need add a stream context. The patch is unlikely to appear in PHP5, but in
PHP7.

Though be aware that forcing blocking reads on pipes, you're putting yourself under the risk to
experience dead locks, see #64438. When used carefully, it still can work and be useful.

Thanks.

------------------------------------------------------------------------
[2015-06-30 13:27:18] poonam dot chawla at mathworks dot com

My apologies. That is correct.

------------------------------------------------------------------------
[2015-06-30 11:30:05] ab@php.net

@poonam, you obviously meant feof, not fgets?

Thanks.

------------------------------------------------------------------------
[2015-06-29 21:17:42] poonam dot chawla at mathworks dot com

Hi,

Thanks for an early response. It is a WINDOWS ONLY issue but unfortunately not the same one.

69900 : The issue/bug is that for every fgets call process hangs for 100ms.
However, in the issue I am experiencing there is no delay/hang on fgets.

Thanks,
Poonam

------------------------------------------------------------------------
[2015-06-29 20:57:34] cmb@php.net

If that is a Windows only issue, it might be somehow related to
bug #69900.

------------------------------------------------------------------------


The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at

    https://bugs.php.net/bug.php?id=69963


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Edit this bug report at https://bugs.php.net/bug.php?id=69963&edit=1


   

Thread (9 messages)

• poonam dot chawla at mathworks dot comMon, 29 Jun 2015 20:21:02 +0000
  • cmb@php.netMon, 29 Jun 2015 20:57:34 +0000Bug #69963 [Opn]: fgets reads EOF if there is nothing on the PIPE to read for a short period
  • poonam dot chawla at mathworks dot comMon, 29 Jun 2015 21:17:43 +0000Bug #69963 [Opn]: fgets reads EOF if there is nothing on the PIPE to read for a short period
  • ab@php.netTue, 30 Jun 2015 11:30:06 +0000Bug #69963 [Asn]: fgets reads EOF if there is nothing on the PIPE to read for a short period
  • poonam dot chawla at mathworks dot comTue, 30 Jun 2015 13:27:19 +0000Bug #69963 [Asn]: fgets reads EOF if there is nothing on the PIPE to read for a short period
  • ab@php.netWed, 01 Jul 2015 14:58:25 +0000Bug #69963 [Asn->Fbk]: fgets reads EOF if there is nothing on the PIPE to read for a short period
  • ab@php.netThu, 02 Jul 2015 20:19:47 +0000Bug #69963 [Fbk]: fgets reads EOF if there is nothing on the PIPE to read for a short period
  • poonam dot chawla at mathworks dot comThu, 02 Jul 2015 20:21:10 +0000Bug #69963 [Fbk->Asn]: fgets reads EOF if there is nothing on the PIPE to read for a short period
  • ab@php.netTue, 07 Jul 2015 13:40:15 +0000Bug #69963 [Asn->Csd]: fgets reads EOF if there is nothing on the PIPE to read for a short period