1 /* root-dev-ino.c -- get the device and inode numbers for '/'.
2    Copyright (C) 2003-2023 Free Software Foundation, Inc.
3 
4    This program is free software: you can redistribute it and/or modify
5    it under the terms of the GNU General Public License as published by
6    the Free Software Foundation, either version 3 of the License, or
7    (at your option) any later version.
8 
9    This program is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12    GNU General Public License for more details.
13 
14    You should have received a copy of the GNU General Public License
15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
16 
17 /* Written by Jim Meyering. */
18 
19 #include <config.h>
20 
21 #include "root-dev-ino.h"
22 
23 #include <stdlib.h>
24 
25 /* Call lstat to get the device and inode numbers for '/'.
26    Upon failure, return nullptr.  Otherwise, set the members of
27    *ROOT_D_I accordingly and return ROOT_D_I.  */
28 struct dev_ino *
get_root_dev_ino(struct dev_ino * root_d_i)29 get_root_dev_ino (struct dev_ino *root_d_i)
30 {
31   struct stat statbuf;
32   if (lstat ("/", &statbuf))
33     return nullptr;
34   root_d_i->st_ino = statbuf.st_ino;
35   root_d_i->st_dev = statbuf.st_dev;
36   return root_d_i;
37 }
38