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-rw-r--r--lib/same-inode.h24
1 files changed, 17 insertions, 7 deletions
diff --git a/lib/same-inode.h b/lib/same-inode.h
index 88a43c7f7..45e322a84 100644
--- a/lib/same-inode.h
+++ b/lib/same-inode.h
@@ -1,6 +1,6 @@
/* Determine whether two stat buffers are known to refer to the same file.
- Copyright (C) 2006, 2009-2017 Free Software Foundation, Inc.
+ Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
@@ -13,21 +13,31 @@
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
#ifndef SAME_INODE_H
# define SAME_INODE_H 1
-# ifdef __VMS
+# include <sys/types.h>
+
+# if defined __VMS && __CRTL_VER < 80200000
# define SAME_INODE(a, b) \
((a).st_ino[0] == (b).st_ino[0] \
&& (a).st_ino[1] == (b).st_ino[1] \
&& (a).st_ino[2] == (b).st_ino[2] \
&& (a).st_dev == (b).st_dev)
-# elif (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
-/* On MinGW, struct stat lacks necessary info, so always return 0.
- Callers can use !a.st_ino to deduce that the information is unknown. */
-# define SAME_INODE(a, b) 0
+# elif defined _WIN32 && ! defined __CYGWIN__
+ /* Native Windows. */
+# if _GL_WINDOWS_STAT_INODES
+ /* stat() and fstat() set st_dev and st_ino to 0 if information about
+ the inode is not available. */
+# define SAME_INODE(a, b) \
+ (!((a).st_ino == 0 && (a).st_dev == 0) \
+ && (a).st_ino == (b).st_ino && (a).st_dev == (b).st_dev)
+# else
+ /* stat() and fstat() set st_ino to 0 always. */
+# define SAME_INODE(a, b) 0
+# endif
# else
# define SAME_INODE(a, b) \
((a).st_ino == (b).st_ino \