wp-admin/includes/class-ftp.php:472$pathname$mode function chmod($pathname, $mode) { if(!$this->site( sprintf('CHMOD %o %s', $mode, $pathname), "chmod")) return FALSE; return TRUE; }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-ftp.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.