Fix canonicalize_path so "../.." isn't stripped off and ignored.

diff --git a/src/port/path.c b/src/port/path.c
index 4736973ed1fd9eb5dca941957b890799781ff066..225ebdf43d08bdb492385910dd597f211abbd24f 100644 (file)
--- a/src/port/path.c
+++ b/src/port/path.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *       $PostgreSQL: pgsql/src/port/path.c,v 1.51 2005/01/26 19:24:03 tgl Exp $
+ *       $PostgreSQL: pgsql/src/port/path.c,v 1.52 2005/08/11 03:53:25 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -284,7 +284,10 @@ canonicalize_path(char *path)
 
                if (len > 2 && strcmp(path + len - 2, "/.") == 0)
                        trim_directory(path);
-               else if (len > 3 && strcmp(path + len - 3, "/..") == 0)
+               /* We can only deal with "/usr/local/..", not "/usr/local/../.." */
+               else if (len > 3 && strcmp(path + len - 3, "/..") == 0 &&
+                                (len != 5 || strcmp(path, "../..") != 0) &&
+                                (len < 6 || strcmp(path + len - 6, "/../..") != 0))
                {
                        trim_directory(path);
                        trim_directory(path);   /* remove directory above */