1 /* Root device and inode number checking.
2 
3    Copyright (C) 2003-2023 Free Software Foundation, Inc.
4 
5    This program is free software: you can redistribute it and/or modify
6    it under the terms of the GNU General Public License as published by
7    the Free Software Foundation, either version 3 of the License, or
8    (at your option) any later version.
9 
10    This program is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13    GNU General Public License for more details.
14 
15    You should have received a copy of the GNU General Public License
16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
17 
18 #ifndef ROOT_DEV_INO_H
19 # define ROOT_DEV_INO_H 1
20 
21 # include "dev-ino.h"
22 # include "same-inode.h"
23 
24 struct dev_ino *
25 get_root_dev_ino (struct dev_ino *root_d_i) _GL_ATTRIBUTE_NONNULL ();
26 
27 /* These macros are common to the programs that support the
28    --preserve-root and --no-preserve-root options.  */
29 
30 # define ROOT_DEV_INO_CHECK(Root_dev_ino, Dir_statbuf) \
31     (Root_dev_ino && PSAME_INODE (Dir_statbuf, Root_dev_ino))
32 
33 # define ROOT_DEV_INO_WARN(Dirname)					\
34   do									\
35     {									\
36       if (STREQ (Dirname, "/"))						\
37         error (0, 0, _("it is dangerous to operate recursively on %s"),	\
38                quoteaf (Dirname));					\
39       else								\
40         error (0, 0,							\
41                _("it is dangerous to operate recursively on %s (same as %s)"), \
42                quoteaf_n (0, Dirname), quoteaf_n (1, "/"));		\
43       error (0, 0, _("use --no-preserve-root to override this failsafe")); \
44     }									\
45   while (0)
46 
47 #endif
48