win32: make stat(2) fetch additional metadata

Modify the WIN32 implementation of stat(2) to fetch inode number,
device id and number of hardlinks.  This requires opening a handle
to the target file so it will be slower.

A number of features can be enabled or start to work:

- tar can detect if an archive is being stored in itself;
- find can support the -inum and -links options;
- ls can display inode numbers;
- diff can detect attempts to compare a file with itself;
- du has better support for hardlinked files;
- cp can detect attempts to copy a file over itself.

1 files changed, 4 insertions, 0 deletions

diff --git a/coreutils/ls.c b/coreutils/ls.c
index 48927c964..a1782ed45 100644
--- a/coreutils/ls.c
+++ b/coreutils/ls.c
@@ -499,7 +499,11 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
 #endif
 
         if (opt & OPT_i) /* show inode# */
+#if !ENABLE_FEATURE_EXTRA_FILE_DATA
                 column += printf("%7"LL_FMT"u ", (long long) dn->dn_ino);
+#else
+                column += printf("%19"LL_FMT"u ", (long long) dn->dn_ino);
+#endif
 //TODO: -h should affect -s too:
         if (opt & OPT_s) /* show allocated blocks */
                 column += printf("%6"OFF_FMT"u ", (off_t) (dn->dn_blocks >> 1));