GDM update: directory permissions differ on /var/log/gdm/

Question

Hello,
Running Arch 64Bits kernel 3.9.9-1 with systemd and i got the following warning during a gdm update today:
(1/6) upgrading libgdm [######################] 100%
(2/6) upgrading gdm [######################] 100%
warning: directory permissions differ on /var/log/gdm/
filesystem: 711 package: 1770
Why would gdm need some 1770 permissions for log files? Looks pretty suspicious to me, especially the sticky bit thing. What did i miss?
PS: BTW the update is successful (it's a warning afterall, not an error)
Thanks
EDIT:
Looks like the opposite situation than 3 years ago:
https://bbs.archlinux.org/viewtopic.php?id=94681
https://bugs.archlinux.org/task/19294
EDIT2: here's what i have in /var/log:
msytux666 var # ls -la
total 64
drwxr-xr-x 14 root root 4096 Jul 6 15:34 .
drwxr-xr-x 20 root root 4096 Jul 16 20:24 ..
-rwxrwxrwx 1 root root 4192 Jun 19 11:27 .com.zerog.registry.xml
drwxr-xr-x 7 root root 4096 Jul 7 00:07 abs
drwxr-xr-x 8 root root 4096 Jun 16 17:28 cache
drwxr-xr-x 3 root root 4096 Jun 17 19:07 db
drwxr-xr-x 2 root root 4096 May 31 20:40 empty
drwxrwxr-x 2 root games 4096 May 31 20:40 games
drwx--x--x 2 gdm gdm 4096 Jun 15 14:23 gdm
drwxr-xr-x 26 root root 4096 Jul 16 01:13 lib
drwxr-xr-x 2 root root 4096 May 31 20:40 local
lrwxrwxrwx 1 root root 11 May 31 20:40 lock -> ../run/lock
drwxr-xr-x 6 root root 4096 Jul 18 00:33 log
lrwxrwxrwx 1 root root 10 May 31 20:40 mail -> spool/mail
drwxr-xr-x 2 root root 4096 May 31 20:40 opt
lrwxrwxrwx 1 root root 6 May 31 20:40 run -> ../run
drwxr-xr-x 6 root root 4096 Jun 16 17:28 spool
drwxrwxrwt 8 root root 4096 Jul 18 00:33 tmp
gdm is owned by gdm, so why would it needs 1770 permissions?
EDIT3:
After further research i appear the way gdm is installed may matter.
Well i installed gdm through pacman and always update it with pacman as well. Never manually compiled/make_install'd it nor used abs for it.
Last edited by BGK (2013-07-19 21:37:13)

Answer 1

Okay I'm confused ...
Commit:https://projects.archlinux.org/svntogit … 92c38d536d
@@ -68,8 +68,7 @@ package_gdm() {
cd $pkgbase-$pkgver
make DESTDIR="$pkgdir" install
- chmod 1770 "$pkgdir/var/log/gdm"
- chmod 700 "$pkgdir/var/lib/gdm/.config/dconf"
+ chmod 711 "$pkgdir/var/log/gdm"
rm -r "$pkgdir/var/run" "$pkgdir/var/gdm"
### Split libgdm
so that takes away the 1770 permissions, and replaces them with 711. 
@@ -5,6 +5,7 @@ post_install() {
getent passwd gdm > /dev/null 2>&1 || usr/sbin/useradd -c 'Gnome Display Manager' -u 120 -g gdm -d /var/lib/gdm -s /sbin/nologin gdm
passwd -l gdm > /dev/null
chown -R gdm:gdm /var/lib/gdm > /dev/null
+ chown root:gdm /var/log/gdm > /dev/null
glib-compile-schemas /usr/share/glib-2.0/schemas
gtk-update-icon-cache -q -t -f /usr/share/icons/hicolor
however:
chown root:gdm /var/log/gdm > /dev/null
.. is where I get confused.  This command makes root and the group gdm the new owners of /var/log/gdm, or did I go wrong somewhere?