--- ./shell.c.org	2005-09-05 11:32:08.000000000 +0900
+++ ./shell.c	2014-10-18 02:46:37.000000000 +0900
@@ -197,6 +197,7 @@
 
 int debugging_mode = 0;		/* In debugging mode with --debugger */
 int no_line_editing = 0;	/* Don't do fancy line editing. */
+int import_functions = 0;	/* Import functions from environment */
 int dump_translatable_strings;	/* Dump strings in $"...", don't execute. */
 int dump_po_strings;		/* Dump strings in $"..." in po format */
 int wordexp_only = 0;		/* Do word expansion only */
@@ -227,6 +228,7 @@
   { "help", Int, &want_initial_help, (char **)0x0 },
   { "init-file", Charp, (int *)0x0, &bashrc_file },
   { "login", Int, &make_login_shell, (char **)0x0 },
+  { "import-functions", Int, &import_functions, (char **)0x0 },
   { "noediting", Int, &no_line_editing, (char **)0x0 },
   { "noprofile", Int, &no_profile, (char **)0x0 },
   { "norc", Int, &no_rc, (char **)0x0 },
--- ./variables.c.org	2014-10-18 02:38:40.000000000 +0900
+++ ./variables.c	2014-10-18 02:38:40.000000000 +0900
@@ -97,6 +97,7 @@
 extern char *this_command_name;
 extern char *command_execution_string;
 extern time_t shell_start_time;
+extern int import_functions;
 
 #if defined (READLINE)
 extern int no_line_editing;
@@ -306,7 +307,7 @@
 
       /* If exported function, define it now.  Don't import functions from
 	 the environment in privileged mode. */
-      if (privmode == 0 && read_but_dont_execute == 0 &&
+      if (import_functions && privmode == 0 && read_but_dont_execute == 0 &&
 	  STREQN (BASHFUNC_PREFIX, name, BASHFUNC_PREFLEN) &&
 	  STREQ (BASHFUNC_SUFFIX, name + char_index - BASHFUNC_SUFFLEN) &&
 	  STREQN ("() {", string, 4))