master 5389b6a856b: Fix renaming symlinks on MS-Windows

[Eli Zaretskii]

branch: master
commit 5389b6a856b39427846e38b06fa398bafc04836a
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    Fix renaming symlinks on MS-Windows
    
    * src/w32.c (sys_rename_replace): Handle renames of a symlink.
    This makes 'wdired-tests' succeed on MS-Windows.
---
 src/w32.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/w32.c b/src/w32.c
index ab45ae8ec6b..6dcbbbcc61b 100644
--- a/src/w32.c
+++ b/src/w32.c
@@ -4761,6 +4761,15 @@ sys_rename_replace (const char *oldname, const char 
*newname, BOOL force)
 
   strcpy (temp, map_w32_filename (oldname, NULL));
 
+  /* 'rename' (which calls MoveFileW) renames the _target_ of the
+     symlink, which is different from Posix behavior and not what we
+     want here.  So in that case we pretend this is a cross-device move,
+     for which Frename_file already has a workaround.  */
+  if (is_symlink (temp))
+    {
+      errno = EXDEV;
+      return -1;
+    }
   /* volume_info is set indirectly by map_w32_filename.  */
   oldname_dev = volume_info.serialnum;