gl/lib/root-dev-ino.h

   1 /* Root device and inode number checking.
   2
   3    Copyright (C) 2003-2024 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