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-rw-r--r--src/tree_based_check.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/tree_based_check.c b/src/tree_based_check.c
index 0a1589e..e999707 100644
--- a/src/tree_based_check.c
+++ b/src/tree_based_check.c
@@ -1,4 +1,7 @@
-/*
+/* SPDX-License-Identifier: Apache-2.0 */
+
+/* Copyright 2025 Thorsten Töpper
+ *
* Compare two files with a single SHA1 hash per line
* useful when comparing filesystem content:
* find fs_to_check -type f -exec sha1sum "{}" \; > output_1.txt