1 files changed, 47 insertions, 0 deletions
diff --git a/lib/root-dev-ino.h b/lib/root-dev-ino.h
new file mode 100644
index 0000000..e416577
--- /dev/null
+++ b/lib/root-dev-ino.h
@@ -0,0 +1,47 @@
+/* Root device and inode number checking.
+
+   Copyright (C) 2003-2022 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/>.  */
+
+#ifndef ROOT_DEV_INO_H
+# define ROOT_DEV_INO_H 1
+
+# include "dev-ino.h"
+# include "same-inode.h"
+
+struct dev_ino *
+get_root_dev_ino (struct dev_ino *root_d_i) _GL_ATTRIBUTE_NONNULL ();
+
+/* These macros are common to the programs that support the
+   --preserve-root and --no-preserve-root options.  */
+
+# define ROOT_DEV_INO_CHECK(Root_dev_ino, Dir_statbuf) \
+    (Root_dev_ino && SAME_INODE (*Dir_statbuf, *Root_dev_ino))
+
+# define ROOT_DEV_INO_WARN(Dirname)					\
+  do									\
+    {									\
+      if (STREQ (Dirname, "/"))						\
+        error (0, 0, _("it is dangerous to operate recursively on %s"),	\
+               quoteaf (Dirname));					\
+      else								\
+        error (0, 0,							\
+               _("it is dangerous to operate recursively on %s (same as %s)"), \
+               quoteaf_n (0, Dirname), quoteaf_n (1, "/"));		\
+      error (0, 0, _("use --no-preserve-root to override this failsafe")); \
+    }									\
+  while (0)
+
+#endif