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[stable25] add a disk_free_space check before writing config #36729

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merged 3 commits into from
Feb 24, 2023
Merged

[stable25] add a disk_free_space check before writing config #36729

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17c5591
add a disk_free_space check before writing config
szaimen Feb 13, 2023
3622911
address review by Joas
szaimen Feb 15, 2023
947dc85
fix it for 32-bit
szaimen Feb 20, 2023
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7 changes: 7 additions & 0 deletions lib/private/Config.php
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Original file line number Diff line number Diff line change
Expand Up @@ -285,6 +285,13 @@ private function writeData() {
'This can usually be fixed by giving the webserver write access to the config directory.');
}

// Never write file back if disk space should be too low
$df = disk_free_space($this->configDir);
$size = strlen($content) + 10240;
if ($df !== false && $df < (float)$size) {
throw new \Exception($this->configDir . " does not have enough space for writing the config file! Not writing it back!");
}

// Try to acquire a file lock
if (!flock($filePointer, LOCK_EX)) {
throw new \Exception(sprintf('Could not acquire an exclusive lock on the config file %s', $this->configFilePath));
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