Edit report at https://bugs.php.net/bug.php?id=51800&edit=1
ID: 51800 Updated by: paj...@php.net Reported by: ph dot wolfer at googlemail dot com Summary: proc_open on Windows hangs forever Status: Assigned Type: Bug Package: Streams related Operating System: Windows PHP Version: * Assigned To: ab Block user comment: N Private report: N New Comment: A good summary of the problem we are experiencing here: http://blogs.msdn.com/b/oldnewthing/archive/2011/07/07/10183884.aspx The fix is not that easy. Either using overlapped/async IO or threads. Previous Comments: ------------------------------------------------------------------------ [2013-05-06 17:06:42] paj...@php.net It is a php bug, same kind of call using standalone C code works fine. ------------------------------------------------------------------------ [2013-05-06 16:55:39] a...@php.net Could you please try this slightly modified php snippet? ============ START process.php =============== <?php $how_much = 10000; $data0 = str_repeat("a", $how_much); $data1 = str_repeat("b", $how_much); fwrite(STDOUT, $data0); fwrite(STDERR, $data1); exit(0); ============ END process.php =============== ============ START 51800.php =============== <?php $cmd = "\"C:/php-sdk/php55/vc11/x86/php-src/Debug/php.exe\" process.php"; $status; $stdout = ""; $stderr = ""; $pipes = array(); $descriptors = array( 0 => array("pipe", "rb"), // stdin 1 => array("pipe", "wb"), // stdout 2 => array("pipe", "wb") // stderr ); $process = proc_open($cmd, $descriptors, $pipes); if (is_resource($process)) { fclose($pipes[0]); while (!feof($pipes[1]) || !feof($pipes[2])) { $stdout .= fread($pipes[1], 1024); $stderr .= fread($pipes[2], 1024); } fclose($pipes[1]); fclose($pipes[2]); $status = proc_close($process); } print_r(array( "status" => $status, "stdout" => $stdout, "stderr" => $stderr, )); ============ END 51800.php =============== This bug might be pretty much not a php bug, but the consequence of the pipe nature. ------------------------------------------------------------------------ [2013-05-06 07:47:53] a...@php.net It hangs at http://lxr.php.net/xref/PHP_5_5/main/streams/plain_wrapper.c#348 , the read call doesn't return at some point. Setting the pipe mode to wb tells no difference. But I guess the cause is somewhere in the upper levels, may be in the descriptor options. So continuing to debug. ------------------------------------------------------------------------ [2013-05-05 14:59:26] a...@php.net Related To: Bug #64438 ------------------------------------------------------------------------ [2013-03-16 03:15:06] hanskrentel at yahoo dot de The problem with exactly 4097 bytes has just been reported here: https://bugs.php.net/bug.php?id=64438 It's a follow up to https://bugs.php.net/bug.php?id=60120 which is wrongly closed as resolved. this and the many other issues show that the flaw is not fixed: https://bugs.php.net/bug.php?id=51800 https://bugs.php.net/bug.php?id=60120 https://bugs.php.net/bug.php?id=64438 ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=51800 -- Edit this bug report at https://bugs.php.net/bug.php?id=51800&edit=1
