<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, Mar 12, 2025 at 8:07 AM Theodore Ts'o <<a href="mailto:tytso@mit.edu">tytso@mit.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I have fond memories of looking at the Larn (or was it Hack/Nethack?)<br>
sources and seeing that it checked ctime to prevent people from<br>
cheating by saving and restoring the game save file, since ctime<br>
couldn't be set without either changing the system clock or directly<br>
accessing the file system (or kernel memory) and messing with the<br>
on-disk inode directly.</blockquote><div><br></div><div>Rogue did it first. :) They also store the inode number.</div></div></div>