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, 6 insertions, 2 deletions

diff --git a/findutils/find.c b/findutils/find.c
index 06ad1b39c..0381f0685 100644
--- a/findutils/find.c
+++ b/findutils/find.c
@@ -121,7 +121,7 @@
 //config:config FEATURE_FIND_INUM
 //config:       bool "Enable -inum: inode number matching"
 //config:       default y
-//config:       depends on FIND
+//config:       depends on FIND && (PLATFORM_POSIX || FEATURE_EXTRA_FILE_DATA)
 //config:
 //config:config FEATURE_FIND_EXEC
 //config:       bool "Enable -exec: execute commands"
@@ -227,7 +227,7 @@
 //config:config FEATURE_FIND_LINKS
 //config:       bool "Enable -links: link count matching"
 //config:       default y
-//config:       depends on FIND
+//config:       depends on FIND && (PLATFORM_POSIX || FEATURE_EXTRA_FILE_DATA)
 //config:       help
 //config:       Support the 'find -links' option for matching number of links.
 
@@ -1361,7 +1361,11 @@ static action*** parse_params(char **argv)
                         action_inum *ap;
                         dbg("%d", __LINE__);
                         ap = ALLOC_ACTION(inum);
+# if !ENABLE_FEATURE_EXTRA_FILE_DATA
                         ap->inode_num = xatoul(arg1);
+# else
+                        ap->inode_num = xatoull(arg1);
+# endif
                 }
 #endif
 #if ENABLE_FEATURE_FIND_USER