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[stable28] config: fix correctness issues in reading #44605

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Apr 3, 2024
Merged

[stable28] config: fix correctness issues in reading #44605

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39 changes: 26 additions & 13 deletions lib/private/Config.php
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Original file line number Diff line number Diff line change
Expand Up @@ -215,22 +215,39 @@ private function readData() {

// Include file and merge config
foreach ($configFiles as $file) {
$fileExistsAndIsReadable = file_exists($file) && is_readable($file);
$filePointer = $fileExistsAndIsReadable ? fopen($file, 'r') : false;
if ($file === $this->configFilePath &&
$filePointer === false) {
// Opening the main config might not be possible, e.g. if the wrong
// permissions are set (likely on a new installation)
continue;
unset($CONFIG);

// Invalidate opcache (only if the timestamp changed)
if (function_exists('opcache_invalidate')) {
opcache_invalidate($file, false);
}

$filePointer = @fopen($file, 'r');
if ($filePointer === false) {
// e.g. wrong permissions are set
if ($file === $this->configFilePath) {
// opening the main config file might not be possible
// (likely on a new installation)
continue;
}

http_response_code(500);
die(sprintf('FATAL: Could not open the config file %s', $file));
}

// Try to acquire a file lock
if (!flock($filePointer, LOCK_SH)) {
throw new \Exception(sprintf('Could not acquire a shared lock on the config file %s', $file));
}

unset($CONFIG);
include $file;
try {
include $file;
} finally {
// Close the file pointer and release the lock
flock($filePointer, LOCK_UN);
fclose($filePointer);
}

if (!defined('PHPUNIT_RUN') && headers_sent()) {
// syntax issues in the config file like leading spaces causing PHP to send output
$errorMessage = sprintf('Config file has leading content, please remove everything before "<?php" in %s', basename($file));
Expand All @@ -242,10 +259,6 @@ private function readData() {
if (isset($CONFIG) && is_array($CONFIG)) {
$this->cache = array_merge($this->cache, $CONFIG);
}

// Close the file pointer and release the lock
flock($filePointer, LOCK_UN);
fclose($filePointer);
}

$this->envCache = getenv();
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