1 /* Determine whether two stat buffers are known to refer to the same file. 2 3 Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc. 4 5 This file is free software: you can redistribute it and/or modify 6 it under the terms of the GNU Lesser General Public License as 7 published by the Free Software Foundation; either version 2.1 of the 8 License, or (at your option) any later version. 9 10 This file 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 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public License 16 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 17 18 #ifndef SAME_INODE_H 19 # define SAME_INODE_H 1 20 21 # include <sys/types.h> 22 23 # if defined __VMS && __CRTL_VER < 80200000 24 # define SAME_INODE(a, b) \ 25 ((a).st_ino[0] == (b).st_ino[0] \ 26 && (a).st_ino[1] == (b).st_ino[1] \ 27 && (a).st_ino[2] == (b).st_ino[2] \ 28 && (a).st_dev == (b).st_dev) 29 # elif defined _WIN32 && ! defined __CYGWIN__ 30 /* Native Windows. */ 31 # if _GL_WINDOWS_STAT_INODES 32 /* stat() and fstat() set st_dev and st_ino to 0 if information about 33 the inode is not available. */ 34 # define SAME_INODE(a, b) \ 35 (!((a).st_ino == 0 && (a).st_dev == 0) \ 36 && (a).st_ino == (b).st_ino && (a).st_dev == (b).st_dev) 37 # else 38 /* stat() and fstat() set st_ino to 0 always. */ 39 # define SAME_INODE(a, b) 0 40 # endif 41 # else 42 # define SAME_INODE(a, b) \ 43 ((a).st_ino == (b).st_ino \ 44 && (a).st_dev == (b).st_dev) 45 # endif 46 47 #endif 48