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[2013-09-10 15:04 UTC] imprec at gmail dot com
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 PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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Last updated: Thu Oct 30 03:00:01 2025 UTC |
Your example code doesn't work for me. In both PHP 5.4 and PHP 5.5, it spams " Warning: proc_get_status(): 7 is not a valid process resource in C:\wamp\www\surveyor\65650_e.php on line 27 Warning: proc_close(): 7 is not a valid process resource in C:\wamp\www\surveyor\65650_e.php on line 29" to the console indefinitely. I rewrote the example code to behave properly and I am unable to verify this bug. New test script: ---------------- <?php error_reporting(E_ALL); $cmd = sprintf('SET XDEBUG_CONFIG=&"C:\wamp\bin\php\php5.5.12\php.exe" -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('*!', 1024*1024*20); $options = array_merge(array('suppress_errors' => true, 'binary_pipes' => true, 'bypass_shell' => false)); $process = proc_open($cmd, $descriptors, $pipes, getcwd(), array(), $options); $status = proc_get_status($process); fwrite($pipes[0], $datastdin); fclose($pipes[0]); unset($pipes[0]); $read = array(); $start = microtime(true); $timeout = 10; while ($status['running']) { if((microtime(true) - $start) > $timeout) { echo "timed out."; break; } usleep(150000); $status = proc_get_status($process); } proc_close($process); rewind($stdout); rewind($stderr); $read['stdout'] = stream_get_contents($stdout); $read['stderr'] = stream_get_contents($stderr); fclose($stdout); fclose($stderr); $failed = false; foreach ($read as $r) { if(!assert($r === $datastdin)) { $failed = true; } } if($failed) { echo "It's a bug!"; } else { echo "It's not a bug!"; } Expected result: ----------------- It's not a bug! Actual result: -------------- It's not a bug! Tested on Windows 8.1 using php versions 5.5.12-nts and 5.4.31-nts.