#34972 [Opn]: STDIN won't allow nonblocking.

From: Date: Mon, 24 Oct 2005 23:27:00 +0000
Subject: #34972 [Opn]: STDIN won't allow nonblocking.
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-87004@lists.php.net to get a copy of this message 
 ID:               34972
 Updated by:       wez@php.net
 Reported By:      VJTD3 at VJTD3 dot com
 Status:           Open
 Bug Type:         CGI related
 Operating System: Windows/Linux
 PHP Version:      5.0.5
 New Comment:

FYI, using fgets() with a non-blocking resource makes no sense.

To implement what you're after, use stream_select() and fread(); these
work on stdin just fine.


Previous Comments:
------------------------------------------------------------------------

[2005-10-24 23:07:00] VJTD3 at VJTD3 dot com

Description:
------------
STDIN won't allow nonblocking.

Reproduce code:
---------------
<?php

 stream_set_blocking(STDIN, FALSE);
 while (1) {
  echo 'infinate loop showing nonblocking problem'."\n";
  echo 'said:'.fgets(STDIN, 1024);
 }

?>

Expected result:
----------------
The test code should be a infinate loop with "infinate loop showing
nonblocking problem" said trillions of times fast like a infinate loop
is suposto do when you make a boo boo. instead it will say it once then
wait for input then wait again etc as a blocked resource is expected.
but "stream_set_blocking(STDIN, FALSE);" should be allowing it to do
the loop unblocked resulting in major screen flooding yet unblocking
the resource is ignored.

This means you can't do something like a client program in your shell
that is "interactive" like a Telnet client or similar.

I can dig the whole not reading as typing because that would be too
"raw" for common usage... [ie phrasing the backspaces etc though maybe
a seperate abaility? this would allow arrow key kinda stuff and
similar...] But waiting for a "\n" or whatever file ending shouldn't
have any effect on that loop. It should act just like a TCP or any
other connection when unblocked there the resource just has a return of
no data.

"php -f test.php" I use to run it.

Actual result:
--------------
uses blocking when "stream_set_blocking(STDIN, FALSE);" was used.


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


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