Merge with MySQL 5.1.53

Open issues:
- A better fix for #57688; Igor is working on this
- Test failure in index_merge_innodb.test ; Igor promised to look at this
- Some Innodb tests fails (need to merge with latest xtradb) ; Kristian promised to look at this.
 - Failing tests: innodb_plugin.innodb_bug56143 innodb_plugin.innodb_bug56632 innodb_plugin.innodb_bug56680 innodb_plugin.innodb_bug57255 
- Werror is disabled;  Should be enabled after merge with xtradb.

1 files changed, 14 insertions, 1 deletions

diff --git a/mysys/my_symlink.c b/mysys/my_symlink.c
index 33f45a882e1..164533ad765 100644
--- a/mysys/my_symlink.c
+++ b/mysys/my_symlink.c
@@ -113,7 +113,6 @@ int my_is_symlink(const char *filename __attribute__((unused)))
 #endif
 }
 
-
 /*
   Resolve all symbolic links in path
   'to' may be equal to 'filename'
@@ -150,7 +149,21 @@ int my_realpath(char *to, const char *filename,
   }
   DBUG_RETURN(result);
 #else
+#ifdef _WIN32
+  int ret= GetFullPathName(filename,FN_REFLEN, to, NULL);
+  if (ret == 0 || ret > FN_REFLEN)
+  {
+    if (ret > FN_REFLEN)
+      my_errno= ENAMETOOLONG;
+    else
+      my_errno= EACCES;
+    if (MyFlags & MY_WME)
+      my_error(EE_REALPATH, MYF(0), filename, my_errno);
+    return -1;
+  }
+#else
   my_load_path(to, filename, NullS);
+#endif
   return 0;
 #endif
 }