1 files changed, 16 insertions, 0 deletions
diff --git a/hooks/build-os-post/10-test-preseed-ips b/hooks/build-os-post/10-test-preseed-ips
new file mode 100755
index 0000000..8973f7d
--- /dev/null
+++ b/hooks/build-os-post/10-test-preseed-ips
@@ -0,0 +1,16 @@
+#!/bin/bash -xe
+set -o pipefail
+
+# test preseed uid / gids:
+DBS_CHANGED=0
+for f in group gshadow passwd shadow; do
+	echo "Checking $f"
+	 if ! diff -Naur files/"$f" "${root:?}"/etc/"$f"; then
+		DBS_CHANGED="$(( $DBS_CHANGED + 1 ))"
+	fi
+done
+
+if [ "$DBS_CHANGED" -gt 0 ]; then
+	echo "Error: user and/or group databases changed" 1>&2
+	exit 1
+fi