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Recover from stale temp file left by crashed writer #11

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Recover from stale temp file left by crashed writer #11

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8 changes: 8 additions & 0 deletions servers.php
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Original file line number Diff line number Diff line change
Expand Up @@ -103,6 +103,14 @@ function cleanup() {
if ($tmp = @fopen($tmpfile, 'x'))
break; // we have the temp file, so fetch new data

// If the temp file is stale (e.g. the writer crashed without cleanup),
// remove it and try again immediately
if (file_exists($tmpfile) && filemtime($tmpfile) < time() - 30) {
error_log("Stale lock file detected for $cachefile, removing");
unlink($tmpfile);
continue;
}

if (time() > $start + 20) { // don't wait forever
die("Can't obtain temporary file\n");
}
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