1 files changed, 8 insertions, 0 deletions

diff --git a/lib/archroot.sh b/lib/archroot.sh
index 87c28a2..6b1b52e 100644
--- a/lib/archroot.sh
+++ b/lib/archroot.sh
@@ -34,6 +34,14 @@ is_subvolume() {
 }
 
 ##
+#  usage : is_same_fs( $path_a, $path_b )
+# return : whether $path_a and $path_b are on the same filesystem
+##
+is_same_fs() {
+	[[ "$(stat -c %d "$1")" == "$(stat -c %d "$1")" ]]
+}
+
+##
 #  usage : subvolume_delete_recursive( $path )
 #
 #    Find all btrfs subvolumes under and including $path and delete them.