From: hanskrentel at yahoo dot de
Operating system: windows
PHP version: 5.4.13
Package: Filesystem function related
Bug Type: Bug
Bug description:proc_open hangs with stdin/out with 4097+ bytes
Description:
------------
The stream used to read data from stdin/out/err hangs if the data passed is
getting larger than 4096 (taht is 4097 and above), always.
Test script:
---------------
error_reporting(E_ALL);
$cmd = 'php -r "fwrite(STDOUT, $in = file_get_contents(\'php://stdin\'));
fwrite(STDERR, $in);"';
$descriptors = array(array('pipe', 'r'), array('pipe', 'w'), array('pipe',
'w'));
$stdin = str_repeat('*', 4097);
$options = array_merge(array('suppress_errors' => true, 'binary_pipes' =>
true, 'bypass_shell' => false));
$process = proc_open($cmd, $descriptors, $pipes, getcwd(), array(),
$options);
foreach ($pipes as $pipe) {
stream_set_blocking($pipe, false);
}
$writePipes = array($pipes[0]);
$stdinLen = strlen($stdin);
$stdinOffset = 0;
unset($pipes[0]);
while ($pipes || $writePipes) {
$r = $pipes;
$w = $writePipes;
$e = null;
$n = stream_select($r, $w, $e, 60);
if (false === $n) {
break;
} elseif ($n === 0) {
proc_terminate($process);
}
if ($w) {
$written = fwrite($writePipes[0], (binary)substr($stdin,
$stdinOffset), 8192);
if (false !== $written) {
$stdinOffset += $written;
}
if ($stdinOffset >= $stdinLen) {
fclose($writePipes[0]);
$writePipes = null;
}
}
foreach ($r as $pipe) {
$type = array_search($pipe, $pipes);
$data = fread($pipe, 8192);
if (false === $data || feof($pipe)) {
fclose($pipe);
unset($pipes[$type]);
}
}
}
Expected result:
----------------
Process executes in a fraction of a second and finishes with exit code 0
Actual result:
--------------
Process executes and hangs.
--
Edit bug report at https://bugs.php.net/bug.php?id=64438&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=64438&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=64438&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=64438&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=64438&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=64438&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=64438&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=64438&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=64438&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=64438&r=support
Expected behavior: https://bugs.php.net/fix.php?id=64438&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=64438&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=64438&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=64438&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=64438&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=64438&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=64438&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=64438&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=64438&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=64438&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=64438&r=mysqlcfg
