Bug #65879 [NEW]: stream_select on STDIN returns 1 even on blocking stream
From: marco at m-s-d dot eu
Operating system: Windows 7 x64
PHP version: 5.5.4
Package: Streams related
Bug Type: Bug
Bug description:stream_select on STDIN returns 1 even on blocking stream
Description:
------------
When doing a stream_select(STDIN,null,null,0), then the return value
will be 1 as soon as one switches the window focus or presses a meta
key, but a subsequent fread(STDIN) will block.
This is possible the same problem as #42044, which was closed as not a
bug - however, I deem this behaviour as a bug as the select() is
supposed to make sure a fread() will NOT block!
Test script:
---------------
public static function sleep($secs) {
echo "sleeping $secs s";
for($i=0;$i<$secs;$i++) {
$a=array(STDIN);
$b=NULL;
$num=stream_select($a,$b,$b,0);
if($num>0) { //read and discard
echo "fd '$num'\n";
echo "'".fread(STDIN,4096)."'";
break;
}
echo "\r".str_repeat(" ",60)."\r";
echo date("d.m.Y H:i:s") . " still sleeping for ".($secs-$i)."
seconds";
sleep(1);
}
echo "done sleeping\n";
}
Expected result:
----------------
The sleep counter is supposed to keep on counting in the background even
if the commandline window is not focused.
Actual result:
--------------
The display will be e.g. "sleeping 20 sfd '1'" after focusing away.
--
Edit bug report at https://bugs.php.net/bug.php?id=65879&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=65879&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=65879&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=65879&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=65879&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=65879&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=65879&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=65879&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=65879&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=65879&r=support
Expected behavior: https://bugs.php.net/fix.php?id=65879&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=65879&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=65879&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=65879&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=65879&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=65879&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=65879&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=65879&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=65879&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=65879&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=65879&r=mysqlcfg
Thread (1 message)
- marco at m-s-d dot eu