Merge pull request #60 from LibreSign/bugfix/prevent-pass-non-string-…

…to-trim Prevent pass null or false to trim function
LibreSign · Jun 18, 2023 · 50354da · 50354da
2 parents 5b768e8 + aedd266
commit 50354da
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/RunServerListener.php b/src/RunServerListener.php
@@ -163,7 +163,11 @@ public function killZombies(): void
             'grep "php -S ' . self::$host . '"|' .
             'grep -v grep|' .
             'sed -e "s/^[[:space:]]*//"|cut -d" " -f1';
-        $pids = trim(shell_exec($cmd));
+        $output = shell_exec($cmd);
+        if (!is_string($output)) {
+            return;
+        }
+        $pids = trim($output);
         $pids = explode("\n", $pids);
         foreach ($pids as $pid) {
             if ($pid && (!$this->pid || $pid !== $this->pid)) {