--- execute_cmd.c.orig	2014-03-02 13:15:12.000000000 -0500
+++ execute_cmd.c	2014-03-02 13:17:14.000000000 -0500
@@ -199,6 +199,9 @@
 
 static int execute_intern_function __P((WORD_DESC *, FUNCTION_DEF *));
 
+/* add an implicit `cd' if the command is the name of a directory */
+int implicitcd = 0;
+
 /* Set to 1 if fd 0 was the subject of redirection to a subshell.  Global
    so that reader_loop can set it to zero before executing a command. */
 int stdin_redir;
@@ -4111,6 +4114,20 @@
 
   QUIT;
 
+  if (implicitcd && interactive_shell && words->next == NULL && func == 0 && builtin == 0)
+    {
+      struct stat finfo;
+
+      if ((stat (words->word->word, &finfo) == 0) && (S_ISDIR (finfo.st_mode)))
+       {
+         this_command_name = "cd";
+         last_shell_builtin = this_shell_builtin;
+         this_shell_builtin = builtin_address (this_command_name);
+         result = (*this_shell_builtin) (words);
+         goto return_result;
+       }
+    }
+
   /* This command could be a shell builtin or a user-defined function.
      We have already found special builtins by this time, so we do not
      set builtin_is_special.  If this is a function or builtin, and we
--- builtins/shopt.def.orig	2014-03-02 13:18:07.000000000 -0500
+++ builtins/shopt.def	2014-03-02 13:19:22.000000000 -0500
@@ -83,6 +83,7 @@
 extern int check_window_size;
 extern int glob_ignore_case, match_ignore_case;
 extern int hup_on_exit;
+extern int implicitcd;
 extern int xpg_echo;
 extern int gnu_error_format;
 extern int check_jobs_at_exit;
@@ -192,6 +193,7 @@
   { "hostcomplete", &perform_hostname_completion, shopt_enable_hostname_completion },
 #endif
   { "huponexit", &hup_on_exit, (shopt_set_func_t *)NULL },
+  { "implicitcd", &implicitcd, (shopt_set_func_t *)NULL },
   { "interactive_comments", &interactive_comments, set_shellopts_after_change },
   { "lastpipe", &lastpipe_opt, (shopt_set_func_t *)NULL },
 #if defined (HISTORY)
@@ -305,6 +307,7 @@
   cdable_vars = mail_warning = 0;
   no_exit_on_failed_exec = print_shift_error = 0;
   check_hashed_filenames = cdspelling = expand_aliases = 0;
+  implicitcd = 0;
 
   source_uses_path = promptvars = 1;
 
--- doc/bash.1.orig	2014-03-02 13:19:59.000000000 -0500
+++ doc/bash.1	2014-03-02 13:21:10.000000000 -0500
@@ -9480,6 +9480,15 @@
 .B SIGHUP
 to all jobs when an interactive login shell exits.
 .TP 8
+.B implicitcd
+If this is set, a directory name typed as a command is treated as a
+request to change to that directory.
+This behavior is inhibited in non-interactive mode or for command
+strings with more than one word.
+Changing directory takes precedence over executing a like-named
+command, but it is done after alias substitutions.
+Tilde and variable expansions work as expected.
+.TP 8
 .B interactive_comments
 If set, allow a word beginning with
 .B #
--- doc/bashref.texi.orig	2014-03-02 13:21:54.000000000 -0500
+++ doc/bashref.texi	2014-03-02 13:22:31.000000000 -0500
@@ -5118,6 +5118,15 @@
 If set, Bash will send @code{SIGHUP} to all jobs when an interactive
 login shell exits (@pxref{Signals}).
 
+@item implicitcd
+If this is set, a directory name typed as a command is treated as a
+request to change to that directory.
+This behavior is inhibited in non-interactive mode or for command
+strings with more than one word.
+Changing directory takes precedence over executing a like-named
+command, but it is done after alias substitutions.
+Tilde and variable expansions work as expected.
+
 @item interactive_comments
 Allow a word beginning with @samp{#}
 to cause that word and all remaining characters on that