1 files changed, 19 insertions, 0 deletions
diff --git a/src/libutil/immutable.hh b/src/libutil/immutable.hh
new file mode 100644
index 000000000000..5a42a4610736
--- /dev/null
+++ b/src/libutil/immutable.hh
@@ -0,0 +1,19 @@
+#ifndef __IMMUTABLE_H
+#define __IMMUTABLE_H
+
+#include <types.hh>
+
+namespace nix {
+
+/* Make the given path immutable, i.e., prevent it from being modified
+   in any way, even by root.  This is a no-op on platforms that do not
+   support this, or if the calling user is not privileged.  On Linux,
+   this is implemented by doing the equivalent of ‘chattr +i path’. */
+void makeImmutable(const Path & path);
+
+/* Make the given path mutable. */
+void makeMutable(const Path & path);
+
+}
+
+#endif /* !__IMMUTABLE_H */