* ext/tcltklib/tcltklib.c (ip_init): cannot create a IP at level 4

* ext/tk/lib/multi-tk.rb: improve 'exit' operation, security check, and error treatment
* ext/tk/lib/multi-tk.rb: allow a trusted slave IP to create slave IPs.
* ext/tk/lib/tk/listbox.rb: add TkListbox#value, value=, clear, and erase
* ext/tk/lib/tk/text.rb: add TkText#clear and erase


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6871 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/ext/tcltklib/tcltklib.c b/ext/tcltklib/tcltklib.c
index b750e55d6f..657c5765b3 100644
--- a/ext/tcltklib/tcltklib.c
+++ b/ext/tcltklib/tcltklib.c
@@ -2848,6 +2848,11 @@ ip_init(argc, argv, self)
     int with_tk = 1;
     Tk_Window mainWin;
 
+    /* security check */
+    if (ruby_safe_level >= 4) {
+	rb_raise(rb_eSecurityError, "Cannot create a TclTkIp object at level %d", ruby_safe_level);
+    }
+
     /* create object */
     Data_Get_Struct(self, struct tcltkip, ptr);
     ptr = ALLOC(struct tcltkip);