Merge ~mitchburton/ubuntu/+source/landscape-client:2040924-sysinfo-cache-perms into ubuntu/+source/landscape-client:ubuntu/devel

[Mitch Burton]

create and set read-write permissions for /var/lib/landscape/landscape-sysinfo.cache to prevent permissions errors when executing update-motd.

Behaviour prior to this change, as ubuntu user on noble:

$ /etc/update-motd.d/50-landscape-sysinfo
/etc/update-motd.d/50-landscape-sysinfo: 17: cannot create /var/lib/landscape/landscape-sysinfo.cache: Permission denied

after upgrade from PPA to 23.08-0ubuntu2~ppa0, with change in this MR. https://launchpad.net/~mitchburton/+archive/ubuntu/2040924/+packages, and waiting 2 minutes until the cache file is old enough:

$ /etc/update-motd.d/50-landscape-sysinfo
  System information as of Thu Nov 23 23:38:03 UTC 2023

  System load: 0.56 Temperature: 81.0 C
  Usage of /: 10.3% of 7.84GB Processes: 21
  Memory usage: 0% Users logged in: 0
  Swap usage: 0% IPv4 address for eth0: 10.76.244.223

[Simon Quigley (tsimonq2)]

Uploaded, thanks!

review: Approve

[Andreas Hasenack (ahasenack)]

This was done already.

diff --git a/debian/changelog b/debian/changelog
index 2479e40..4eaf917 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+landscape-client (23.08-0ubuntu2) noble; urgency=medium
+
+  * d/landscape-common.postint: ensure sysinfo cache file exists and is globally
+    read-write (LP: #2040924)
+
+ -- Mitch Burton <[e-mail]>  Thu, 23 Nov 2023 14:28:14 -0800
+
 landscape-client (23.08-0ubuntu1) mantic; urgency=medium
 
   * New upstream release 23.08
diff --git a/debian/landscape-common.postinst b/debian/landscape-common.postinst
index e488296..9aeb7a5 100755
--- a/debian/landscape-common.postinst
+++ b/debian/landscape-common.postinst
@@ -90,6 +90,12 @@ case "$1" in
         WRAPPER=/usr/share/landscape/landscape-sysinfo.wrapper
         PROFILE_LOCATION=/etc/profile.d/50-landscape-sysinfo.sh
         UPDATE_MOTD_LOCATION=/etc/update-motd.d/50-landscape-sysinfo
+        STAMP_LOCATION=/var/lib/landscape/landscape-sysinfo.cache
+
+        touch $STAMP_LOCATION
+        chown landscape:root $STAMP_LOCATION
+        chmod 666 $STAMP_LOCATION
+
         if [ "$RET" = "Cache sysinfo in /etc/motd" ]; then
             rm -f $PROFILE_LOCATION 2>/dev/null || true
             ln -sf $WRAPPER $UPDATE_MOTD_LOCATION