rmdir now may be used to remove empty nodes from the pseudo-filesystem

ChangeLog.txt

@@ -825,4 +825,6 @@
 	  (2014-2-10).
 	* apps/examples/nximage/Kconfig and apps/examples/uip/Kconfig: Incomplete
 	  Kconfig files fleshed out by Alan Carvalho de Assis (2014-2-18).
-
+	* apps/nshilib: rmdir can now be used in the pseudo-filesystem.  Hence,
+	  the command needs to be available even if there are no write-able
+	  filesystem enabled (2014-2-19).

nshlib/nsh.h

@@ -717,6 +717,9 @@ void nsh_usbtrace(void);
 #  ifndef CONFIG_NSH_DISABLE_LS
       int cmd_ls(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
 #  endif
+#  ifndef CONFIG_NSH_DISABLE_RMDIR
+      int cmd_rmdir(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
+#  endif
 #  if defined(CONFIG_SYSLOG) && defined(CONFIG_RAMLOG_SYSLOG) && !defined(CONFIG_NSH_DISABLE_DMESG)
       int cmd_dmesg(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
 #  endif
@@ -755,9 +758,6 @@ void nsh_usbtrace(void);
 #       ifndef CONFIG_NSH_DISABLE_RM
            int cmd_rm(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
 #       endif
-#       ifndef CONFIG_NSH_DISABLE_RMDIR
-           int cmd_rmdir(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
-#       endif
 #     endif /* CONFIG_FS_WRITABLE */
 #   endif /* CONFIG_FS_READABLE */
 #   ifdef CONFIG_FS_FAT

nshlib/nsh_command.c

@@ -344,6 +344,9 @@ static const struct cmdmap_s g_cmdmap[] =
 # ifndef CONFIG_NSH_DISABLE_RM
   { "rm",       cmd_rm,       2, 2, "<file-path>" },
 # endif
+# endif
+
+#if CONFIG_NFILE_DESCRIPTORS > 0
 # ifndef CONFIG_NSH_DISABLE_RMDIR
   { "rmdir",    cmd_rmdir,    2, 2, "<dir-path>" },
 # endif

nshlib/nsh_fscmds.c

@@ -1369,7 +1369,7 @@ int cmd_rm(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
  * Name: cmd_rmdir
  ****************************************************************************/
 
-#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_WRITABLE)
+#if CONFIG_NFILE_DESCRIPTORS > 0
 #ifndef CONFIG_NSH_DISABLE_RMDIR
 int cmd_rmdir(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
 {