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fix potential deadlock when writing a lot of data to a psql pipe and not reading what comes back;

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stdout/stderr weren't used anyway so just connect them through
This commit is contained in:
Frederik Ramm
2011-02-21 00:02:17 +00:00
parent a4c63c094f
commit b83af9c248
1 changed files with 6 additions and 10 deletions
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16
utils/setup.php
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@@ -372,22 +372,18 @@
$sCMD = 'psql -p '.$aDSNInfo['port'].' '.$aDSNInfo['database'];
$aDescriptors = array(
0 => array('pipe', 'r'),
1 => array('pipe', 'w'),
2 => array('file', '/dev/null', 'a')
1 => STDOUT,
2 => STDERR
);
$ahPipes = null;
$hProcess = proc_open($sCMD, $aDescriptors, $ahPipes);
if (!is_resource($hProcess)) fail('unable to start pgsql');
fwrite($ahPipes[0], $sScript);
fclose($ahPipes[0]);
// TODO: error checking
while(!feof($ahPipes[1]))
while(strlen($sScript))
{
echo fread($ahPipes[1], 4096);
$written = fwrite($ahPipes[0], $sScript);
$sScript = substr($sScript, $written);
}
fclose($ahPipes[1]);
fclose($ahPipes[0]);
proc_close($hProcess);
}