From: romain at neutron dot io Operating system: Irrelevant PHP version: 5.4.19 Package: Program Execution Bug Type: Bug Bug description:Using proc_open with file handles fails on large buffers
Description: ------------ When using proc_open with file handles instead of pipes (required on Windows, because of bug https://bugs.php.net/bug.php?id=51800), when reading large outputs, the result might not retrieve what's expected. The problem has been mentioned when compiling large sass files to stdout on windows. The output may sometimes be different than the actual output you can get running the command in console. The provided script fails 3 times on 5 on windows environment. Nearly everytime on OSX. Test script: --------------- <?php error_reporting(E_ALL); $cmd = sprintf('php -r %s', escapeshellarg('fwrite(STDOUT, $in = file_get_contents(\'php://stdin\')); fwrite(STDERR, $in);')); $stdout = tmpfile(); $stderr = tmpfile(); $descriptors = array( array('pipe', 'r'), $stdout, $stderr, ); $handles = array( $stdout, $stderr ); $datastdin = str_repeat('*!', 8192*128); $options = array_merge(array('suppress_errors' => true, 'binary_pipes' => true, 'bypass_shell' => false)); $process = proc_open($cmd, $descriptors, $pipes, getcwd(), array(), $options); fwrite($pipes[0], $datastdin); fclose($pipes[0]); unset($pipes[0]); $read = array(); while ($handles) { $status = proc_get_status($process); if (!$status['running']) { proc_close($process); } $h = $handles; foreach ($h as $offset => $handle) { fseek($handle, isset($read[$offset]) ? strlen($read[$offset]) : 0); if (!isset($read[$offset])) { $read[$offset] = ''; } $read[$offset] .= fread($handle, 8192); if (false === $status['running'] && feof($handle)) { fclose($handle); unset($handles[$offset]); } } } foreach ($read as $r) { assert($r === $datastdin); } Expected result: ---------------- No errors, assertion is good. Actual result: -------------- PHP Warning: assert(): Assertion failed in C:\symfony\src\Symfony\Component\Pro cess\bug.php on line 47 PHP Warning: assert(): Assertion failed in C:\symfony\src\Symfony\Component\Pro cess\bug.php on line 47 -- Edit bug report at https://bugs.php.net/bug.php?id=65650&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=65650&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=65650&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=65650&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=65650&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=65650&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=65650&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=65650&r=needscript Try newer version: https://bugs.php.net/fix.php?id=65650&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=65650&r=support Expected behavior: https://bugs.php.net/fix.php?id=65650&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=65650&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=65650&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=65650&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=65650&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=65650&r=dst IIS Stability: https://bugs.php.net/fix.php?id=65650&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=65650&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=65650&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=65650&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=65650&r=mysqlcfg
