bzr commit into mysql-5.5 branch (Dmitry.Shulga:3432) Bug#60987 Bug#12403662

[Dmitry Shulga]

#At file:///Users/shulga/projects/mysql/mysql-5.5-bug12403662/ based on revid:ramil@stripped

 3432 Dmitry Shulga	2011-06-14
      Fixed bug#12403662 (formerly known as bug#60987): LOAD DATA LOCAL INFILE
      can't parse relative paths "higher" than 3 levels up
      
      When trying to LOAD DATA LOCAL INFILE using a relative path with 3 or
      more levels up in the directory hierarchy, mysqld wrongly parses 
      the path and as a consequence, can't find the file.
      
      This bug was introduced by patch for bug#58205.
      The reason for bug is that implementaiton of function cleanup_dirname()
      doesn't take into account the begin of buffer being processed during
      handling of path to file.
     @ mysys/mf_pack.c
        function cleanup_dirname() was modified: fixed wrong comparison
        condition when handling substring "../" at begin of buffer.

    modified:
      mysys/mf_pack.c
=== modified file 'mysys/mf_pack.c'
--- a/mysys/mf_pack.c	2010-12-29 00:26:31 +0000
+++ b/mysys/mf_pack.c	2011-06-14 04:58:18 +0000
@@ -193,7 +193,7 @@ size_t cleanup_dirname(register char *to
 	  while (pos >= start && *pos != FN_LIBCHAR)	/* remove prev dir */
 	    pos--;
           if (pos[1] == FN_HOMELIB ||
-              (pos > start && memcmp(pos, parent, length) == 0))
+              (pos >= start && memcmp(pos, parent, length) == 0))
 	  {					/* Don't remove ~user/ */
 	    pos=strmov(end_parentdir+1,parent);
 	    *pos=FN_LIBCHAR;


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