From b4c44c4998a397b307179a3bf27dcf4c0f9729a5 Mon Sep 17 00:00:00 2001
From: Adrien <Bacto@users.noreply.github.com>
Date: Mon, 24 Feb 2025 14:32:24 +0100
Subject: [PATCH] Handle shared locks when reading the file to avoid race
 conditions

---
 src/IniReader.php | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/IniReader.php b/src/IniReader.php
index 56c3d7f..aad70b9 100644
--- a/src/IniReader.php
+++ b/src/IniReader.php
@@ -341,6 +341,20 @@ private function getFileContent($filename)
             if (!$handle) {
                 return false;
             }
+
+            // Ensuring we have a shared lock to avoid race conditions when another process is writing to the file.
+            $flockRetries = 0;
+            while (true) {
+                if (flock($handle, LOCK_SH)) {
+                    break;
+                }
+                if ($flockRetries >= 20) {
+                    throw new Exception("Timeout after trying to get a shared lock on file $filename.");
+                }
+                usleep(100 * 1000);
+                $flockRetries++;
+            }
+
             $ini = fread($handle, filesize($filename));
             fclose($handle);
             return $ini;