Write DMI UUID to machine_uuid.sys for user-accessible machine ID

install.sh writes the last 12 chars of the DMI system UUID to
config.d/machine_uuid.sys (0444) after git clone, so non-root scripts
can derive the hardware-bound hostname without needing dmidecode.

conf.dist reads machine_uuid.sys first; falls back to dmidecode (root)
or hostname -s (user) if the file is absent.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config/setup_system.conf.dist

@@ -16,7 +16,9 @@ export UPGRADEBRANCH="main"
 export CLIENTADMINGROUP="clientadmins"
 
 # Method to determine Unique Hostname / FQDN of the Client. May be replaced by your needs
-if [ "$EUID" -eq 0 ]; then
+if [ -r /opt/sys_config/config.d/machine_uuid.sys ]; then
+    export HOSTNM="pc-$( cat /opt/sys_config/config.d/machine_uuid.sys )"
+elif [ "$EUID" -eq 0 ]; then
     export HOSTNM="pc-$( dmidecode -t system | grep -i 'UUID' | sed 's/UUID: //' | tr '[:upper:]' '[:lower:]' | sed 's/[^0-9a-z]*//g' | xargs|tail -c 13)"
 else
     export HOSTNM=$( hostname -s )

system_setup/install.sh

@@ -497,6 +497,15 @@ mount -o "$MOUNT_OPTS" "$OEMDRV_DEV" "$MOUNT_POINT" || die "mount failed."
 info "Cloning $REPO_URL into $MOUNT_POINT..."
 cd "$MOUNT_POINT" || die "Cannot cd to $MOUNT_POINT."
 git clone --progress --depth 1 "$REPO_URL" . || die "git clone failed."
+
+# Write hardware UUID to a user-readable per-machine file
+mkdir -p "${MOUNT_POINT}/config.d"
+dmidecode -t system | grep -i 'UUID' \
+    | sed 's/UUID: //' | tr '[:upper:]' '[:lower:]' \
+    | sed 's/[^0-9a-z]*//g' | xargs | tail -c 13 \
+    > "${MOUNT_POINT}/config.d/machine_uuid.sys"
+chmod 0444 "${MOUNT_POINT}/config.d/machine_uuid.sys"
+
 chmod o=rwX . -R # to make changes to the configuration possible after install
 
 # ── Done ──────────────────────────────────────────────────────────────────────