Add an elemental-register checker

If the elemental-register service fails to register on a
reboot after install, reset or upgrade the checker will
cause a reboot to a fallback OS.

Signed-off-by: David Cassany <[email protected]>

framework/files/usr/libexec/elemental-checker/elemental-register.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+run_checks() {
+    # Check first if it is installed
+    rpm -q --quiet elemental-register
+    test $? -ne 0 && return
+
+    # ignore if elemental-register is not enabled
+    systemctl is-enabled -q elemental-register.timer
+    test $? -ne 0 && return
+
+    systemctl is-active -q elemental-register.service
+    test $? -ne 0 && exit 1
+}
+
+case "$1" in
+    check)
+        run_checks
+        ;;
+    *)
+        echo "Usage: $0 {check}"
+        exit 1
+        ;;
+esac
+
+exit 0