Changeset 6e11fe2

Timestamp:

09/30/2023 08:12:56 AM (8 months ago)

Author:

Xi Ruoyao <xry111@…>

Branches:

12.1, 12.1-rc1, multilib, trunk, xry111/arm64, xry111/clfs-ng, xry111/loongarch, xry111/loongarch-12.1, xry111/mips64el, xry111/update-glibc

Children:

c7cd2c7

Parents:

3cd2eae

git-author:

Xi Ruoyao <xry111@…> (09/30/2023 08:11:57 AM)

git-committer:

Xi Ruoyao <xry111@…> (09/30/2023 08:12:56 AM)

Message:

createfiles: Add Y2038 info about the traditional {b,u,w}tmp and lastlog files

And utmp does not exist on systemd-based LFS.

File:

• chapter07/createfiles.xml (modified) (1 diff)

chapter07/createfiles.xml

@@ -216 +216 @@
   the bad login attempts.</para>
 
-  <note><para>The <filename>/run/utmp</filename> file records the users that
-  are currently logged in.  This file is created dynamically in the boot
-  scripts.</para></note>
+  <!-- systemd no longer creates this -->
+  <note revision='sysv'><para>The <filename>/run/utmp</filename> file
+  records the users that are currently logged in.  This file is created
+  dynamically in the boot scripts.</para></note>
+
+  <!-- AFAIK they are not vital for system function, users requiring such
+       info should rely on systemd-logind or elogind or some custom PAM
+       module.  Maybe we can stop to create them at all.  -->
+  <note>
+    <para>
+      The <phrase revision='sysv'><filename>utmp</filename>,
+      </phrase><filename>wtmp</filename>, <filename>btmp</filename>, and
+      <filename>lastlog</filename> files use 32-bit integers for timestamp
+      and they'll be fundamentally broken after year 2038.  Many packages
+      have stopped using them and other packages are going to stop using
+      them.  Do not rely on the contents of them for anything.
+    </para>
+  </note>
 
 </sect1>