1 files changed, 44 insertions, 0 deletions
diff --git a/lib/smack.h b/lib/smack.h
new file mode 100644
index 0000000..0c85849
--- /dev/null
+++ b/lib/smack.h
@@ -0,0 +1,44 @@
+/* Include and determine availability of smack routines
+   Copyright (C) 2013-2023 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Here we replace or wrap the most common smack functions used by coreutils.
+   Others will need to be protected by HAVE_SMACK.  */
+
+#ifdef HAVE_SMACK
+# include <sys/smack.h>
+#else
+static inline ssize_t
+smack_new_label_from_self (char **label)
+{
+  return -1;
+}
+
+static inline int
+smack_set_label_for_self (char const *label)
+{
+  return -1;
+}
+#endif
+
+static inline bool
+is_smack_enabled (void)
+{
+#ifdef HAVE_SMACK
+  return smack_smackfs_path () != nullptr;
+#else
+  return false;
+#endif
+}