* src/keyboard.c: Override inhibit-quit after the third C-g.

(force_quit_count): New var.
(handle_interrupt): Use it.

Fixes: debbugs:6585

2 files changed, 27 insertions, 8 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 76a8353b853..994b8d034ff 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2012-04-10  "Jason S. Cornez"  <jcornez@ravenpack.com>  (tiny change)
+
+        * keyboard.c: Override inhibit-quit after the third C-g (bug#6585).
+        (force_quit_count): New var.
+        (handle_interrupt): Use it.
+
 2012-04-10  Juanma Barranquero  <lekktu@gmail.com>
 
         * w32.c (w32_delayed_load): Record the full path of the library
@@ -17,8 +23,8 @@
         * process.h: Add integer `gnutls_handshakes_tried' member to
         process struct.
 
-        * gnutls.h: Add `GNUTLS_EMACS_HANDSHAKES_LIMIT' upper limit.  Add
-        convenience `GNUTLS_LOG2i' macro.
+        * gnutls.h: Add `GNUTLS_EMACS_HANDSHAKES_LIMIT' upper limit.
+        Add convenience `GNUTLS_LOG2i' macro.
 
         * gnutls.c (gnutls_log_function2i): Convenience log function.
         (emacs_gnutls_read): Use new log functions,
@@ -104,8 +110,8 @@
         (xml_cleanup_parser): New function, export for fn_xmlCleanupParser.
         Calls xmlCleanupParser only if libxml2 was loaded (or statically
         linked in).
-        (Flibxml_parse_html_region, Flibxml_parse_xml_region): Call
-        init_libxml2_functions before calling libxml2 functions.
+        (Flibxml_parse_html_region, Flibxml_parse_xml_region):
+        Call init_libxml2_functions before calling libxml2 functions.
         (syms_of_xml) <Qlibxml2_dll>: DEFSYM it.
 
         * emacs.c: Don't include libxml/parser.h.
diff --git a/src/keyboard.c b/src/keyboard.c
index 50b2ade8ee4..9ff19d61d41 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -10213,7 +10213,7 @@ DEFUN ("read-key-sequence-vector", Fread_key_sequence_vector,
 
   memset (keybuf, 0, sizeof keybuf);
   GCPRO1 (keybuf[0]);
-  gcpro1.nvars = (sizeof keybuf/sizeof (keybuf[0]));
+  gcpro1.nvars = (sizeof keybuf / sizeof (keybuf[0]));
 
   if (NILP (continue_echo))
     {
@@ -10227,7 +10227,7 @@ DEFUN ("read-key-sequence-vector", Fread_key_sequence_vector,
     cancel_hourglass ();
 #endif
 
-  i = read_key_sequence (keybuf, (sizeof keybuf/sizeof (keybuf[0])),
+  i = read_key_sequence (keybuf, (sizeof keybuf / sizeof (keybuf[0])),
                          prompt, ! NILP (dont_downcase_last),
                          ! NILP (can_return_switch_frame), 0);
 
@@ -10918,6 +10918,11 @@ interrupt_signal (int signalnum)	/* If we don't have an argument, some */
   errno = old_errno;
 }
 
+/* If Emacs is stuck because `inhibit-quit' is true, then keep track
+   of the number of times C-g has been requested.  If C-g is pressed
+   enough times, then quit anyway.  See bug#6585.  */
+static int force_quit_count;
+
 /* This routine is called at interrupt level in response to C-g.
 
    It is called from the SIGINT handler or kbd_buffer_store_event.
@@ -11036,8 +11041,16 @@ handle_interrupt (void)
           UNGCPRO;
         }
       else
-        /* Else request quit when it's safe */
-        Vquit_flag = Qt;
+        { /* Else request quit when it's safe.  */
+          if (NILP (Vquit_flag))
+            force_quit_count = 0;
+          if (++force_quit_count == 3)
+            {
+              immediate_quit = 1;
+              Vinhibit_quit = Qnil;
+            }
+          Vquit_flag = Qt;
+        }
     }
 
 /* TODO: The longjmp in this call throws the NS event loop integration off,