1 files changed, 85 insertions, 0 deletions
diff --git a/src/fsade.h b/src/fsade.h
new file mode 100644
index 0000000..fbe02d8
--- /dev/null
+++ b/src/fsade.h
@@ -0,0 +1,85 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+/**
+ * A facade over (file)system features that are (un)implemented differently
+ * between platforms.
+ */
+
+#ifndef BFS_FSADE_H
+#define BFS_FSADE_H
+
+#include "bfs.h"
+
+#define BFS_CAN_CHECK_ACL (BFS_HAS_ACL_GET_FILE || BFS_HAS_ACL_TRIVIAL)
+
+#define BFS_CAN_CHECK_CAPABILITIES BFS_WITH_LIBCAP
+
+#define BFS_CAN_CHECK_CONTEXT BFS_WITH_LIBSELINUX
+
+#if __has_include(<sys/extattr.h>) || __has_include(<sys/xattr.h>)
+#  define BFS_CAN_CHECK_XATTRS true
+#else
+#  define BFS_CAN_CHECK_XATTRS false
+#endif
+
+struct BFTW;
+
+/**
+ * Check if a file has a non-trivial Access Control List.
+ *
+ * @ftwbuf
+ *         The file to check.
+ * @return
+ *         1 if it does, 0 if it doesn't, or -1 if an error occurred.
+ */
+int bfs_check_acl(const struct BFTW *ftwbuf);
+
+/**
+ * Check if a file has a non-trivial capability set.
+ *
+ * @ftwbuf
+ *         The file to check.
+ * @return
+ *         1 if it does, 0 if it doesn't, or -1 if an error occurred.
+ */
+int bfs_check_capabilities(const struct BFTW *ftwbuf);
+
+/**
+ * Check if a file has any extended attributes set.
+ *
+ * @ftwbuf
+ *         The file to check.
+ * @return
+ *         1 if it does, 0 if it doesn't, or -1 if an error occurred.
+ */
+int bfs_check_xattrs(const struct BFTW *ftwbuf);
+
+/**
+ * Check if a file has an extended attribute with the given name.
+ *
+ * @ftwbuf
+ *         The file to check.
+ * @name
+ *         The name of the xattr to check.
+ * @return
+ *         1 if it does, 0 if it doesn't, or -1 if an error occurred.
+ */
+int bfs_check_xattr_named(const struct BFTW *ftwbuf, const char *name);
+
+/**
+ * Get a file's SELinux context
+ *
+ * @ftwbuf
+ *         The file to check.
+ * @return
+ *         The file's SELinux context, or NULL on failure.
+ */
+char *bfs_getfilecon(const struct BFTW *ftwbuf);
+
+/**
+ * Free a bfs_getfilecon() result.
+ */
+void bfs_freecon(char *con);
+
+#endif // BFS_FSADE_H