note 62783 deleted from function.proc-open by nlopess
| From: | nlopess@php.net | Date: | Fri, 07 Apr 2006 19:24:18 +0000 |
| Subject: | note 62783 deleted from function.proc-open by nlopess | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-107539@lists.php.net to get a copy of this message | ||
Note Submitter: Frederick Leitner
----
In reference to richard's comment below:
http://il2.php.net/manual/en/function.proc-open.php#62484
there is the possible problem that the process may die before you have finished writing to it. This
seems to fix the problem:
$descriptorSpec = array(0 => array("pipe", "r"),
1 => array('pipe', 'w'),
2 => array('pipe', 'w'));
$process = proc_open($command, $descriptorSpec, $pipes);
$txOff = 0; $txLen = strlen($stdin);
$stdout = ''; $stdoutDone = FALSE;
$stderr = ''; $stderrDone = FALSE;
stream_set_blocking($pipes[0], 0); // Make stdin/stdout/stderr non-blocking
stream_set_blocking($pipes[1], 0);
stream_set_blocking($pipes[2], 0);
$all_is_good = true;
while ($all_is_good) {
$rx = array(); // The program's stdout/stderr
if (!$stdoutDone) $rx[] = $pipes[1];
if (!$stderrDone) $rx[] = $pipes[2];
$tx = array(); // The program's stdin
if ($txOff < $txLen) $tx[] = $pipes[0];
stream_select($rx, $tx, $ex = NULL, NULL, NULL); // Block til r/w possible
if ($txOff < $txLen) {
$txRet = fwrite($pipes[0], substr($stdin, $txOff, 8192));
if ($txRet > 0 ) $txOff += $txRet;
if ($txOff >= $txLen) fclose($pipes[0]);
}
foreach ($rx as $r) {
if ($r == $pipes[1]) {
$stdout .= fread($pipes[1], 8192);
if (feof($pipes[1])) { fclose($pipes[1]); $stdoutDone = TRUE; }
} else if ($r == $pipes[2]) {
$stderr .= fread($pipes[2], 8192);
if (feof($pipes[2])) { fclose($pipes[2]); $stderrDone = TRUE; }
}
}
$all_is_good = is_resource($process) && ($txOff < $txLen) &&
(!$stdoutDone) && (!$stderrDone);
}
$returnValue = proc_close($process);