(copy_internal): Make it so `mv -f FILE FILE' does not remove FILE.

Based on a patch from Chris Yeo.

diff --git a/src/copy.c b/src/copy.c
index fe68d49..9246aa0 100644 (file)
--- a/src/copy.c
+++ b/src/copy.c
@@ -568,6 +568,13 @@ copy_internal (const char *src_path, const char *dst_path,
                }
              else
                {
+                 if (SAME_INODE (src_sb, dst_sb))
+                   {
+                     error (0, 0, _("`%s' and `%s' are the same file"),
+                            src_path, dst_path);
+                     return 1;
+                   }
+
                  if (unlink (dst_path) && errno != ENOENT)
                    {
                      error (0, errno, _("cannot remove old link to `%s'"),