1 files changed, 37 insertions, 0 deletions
diff --git a/lib/root-dev-ino.c b/lib/root-dev-ino.c
new file mode 100644
index 0000000..b158c27
--- /dev/null
+++ b/lib/root-dev-ino.c
@@ -0,0 +1,37 @@
+/* root-dev-ino.c -- get the device and inode numbers for '/'.
+   Copyright (C) 2003-2023 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/>.  */
+
+/* Written by Jim Meyering. */
+
+#include <config.h>
+
+#include "root-dev-ino.h"
+
+#include <stdlib.h>
+
+/* Call lstat to get the device and inode numbers for '/'.
+   Upon failure, return nullptr.  Otherwise, set the members of
+   *ROOT_D_I accordingly and return ROOT_D_I.  */
+struct dev_ino *
+get_root_dev_ino (struct dev_ino *root_d_i)
+{
+  struct stat statbuf;
+  if (lstat ("/", &statbuf))
+    return nullptr;
+  root_d_i->st_ino = statbuf.st_ino;
+  root_d_i->st_dev = statbuf.st_dev;
+  return root_d_i;
+}