add a restart feature, for debugging

2001-10-15  Havoc Pennington  <hp@pobox.com>

	* src/main.c (meta_restart): add a restart feature, for debugging

	* src/tools/metacity-restart.c: little utility program to trigger
	the restart

7 files changed, 116 insertions, 5 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index dfa82de..08f5280 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,5 +1,5 @@
 
-SUBDIRS=wm-tester
+SUBDIRS=wm-tester tools
 
 INCLUDES=@METACITY_CFLAGS@ -DMETACITY_LIBEXECDIR=\"$(libexecdir)\" -DHOST_ALIAS=\"@HOST_ALIAS@\" 
 
diff --git a/src/display.c b/src/display.c
index 482754f..c28c4e2 100644
--- a/src/display.c
+++ b/src/display.c
@@ -136,7 +136,8 @@ meta_display_open (const char *name)
     "WM_ICON_SIZE",
     "_KWM_WIN_ICON",
     "_NET_WM_MOVERESIZE",
-    "_NET_ACTIVE_WINDOW"
+    "_NET_ACTIVE_WINDOW",
+    "_METACITY_RESTART_MESSAGE"
   };
   Atom atoms[G_N_ELEMENTS(atom_names)];
   
@@ -226,6 +227,7 @@ meta_display_open (const char *name)
   display->atom_kwm_win_icon = atoms[41];
   display->atom_net_wm_moveresize = atoms[42];
   display->atom_net_active_window = atoms[43];
+  display->atom_metacity_restart_message = atoms[44];
   
   /* Offscreen unmapped window used for _NET_SUPPORTING_WM_CHECK,
    * created in screen_new
@@ -444,7 +446,7 @@ meta_display_close (MetaDisplay *display)
   g_free (display->name);
 
   all_displays = g_slist_remove (all_displays, display);
-  
+
   g_free (display);
 
   if (all_displays == NULL)
@@ -921,6 +923,7 @@ event_callback (XEvent   *event,
           
           if (screen)
             {
+              meta_debug_spew ("client for screen\n");
               if (event->xclient.message_type ==
                   display->atom_net_current_desktop)
                 {
@@ -942,6 +945,12 @@ event_callback (XEvent   *event,
                   else
                     meta_verbose ("Don't know about workspace %d\n", space);
                 }
+              else if (event->xclient.message_type ==
+                       display->atom_metacity_restart_message)
+                {
+                  meta_verbose ("Received restart request\n");
+                  meta_restart ();
+                }
             }
         }
       break;
diff --git a/src/display.h b/src/display.h
index 80072c2..0074b9c 100644
--- a/src/display.h
+++ b/src/display.h
@@ -101,6 +101,7 @@ struct _MetaDisplay
   Atom atom_kwm_win_icon;
   Atom atom_net_wm_moveresize;
   Atom atom_net_active_window;
+  Atom atom_metacity_restart_message;
   
   /* This is the actual window from focus events,
    * not the one we last set
diff --git a/src/main.c b/src/main.c
index a5eddb1..9d0d402 100644
--- a/src/main.c
+++ b/src/main.c
@@ -34,9 +34,12 @@
 #include <string.h>
 #include <signal.h>
 #include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
 
 static MetaExitCode meta_exit_code = META_EXIT_SUCCESS;
 static GMainLoop *meta_main_loop = NULL;
+static gboolean meta_restart_after_quit = FALSE;
 
 static void
 log_handler (const gchar   *log_domain,
@@ -187,15 +190,40 @@ main (int argc, char **argv)
   {
     GSList *displays;
     GSList *tmp;
-    
-    displays = meta_displays_list ();
+
+    /* we need a copy since closing the display removes it
+     * from the list
+     */
+    displays = g_slist_copy (meta_displays_list ());
     tmp = displays;
     while (tmp != NULL)
       {
         meta_display_close (tmp->data);
         tmp = tmp->next;
       }
+    g_slist_free (displays);
   }
+
+  if (meta_restart_after_quit)
+    {
+      GError *err;
+
+      err = NULL;
+      if (!g_spawn_async (NULL,
+                          argv,
+                          NULL,
+                          G_SPAWN_SEARCH_PATH,
+                          NULL,
+                          NULL,
+                          NULL,
+                          &err))
+        {
+          meta_fatal (_("Failed to restart: %s\n"),
+                      err->message);
+          g_error_free (err); /* not reached anyhow */
+          meta_exit_code = META_EXIT_ERROR;
+        }
+    }
   
   return meta_exit_code;
 }
@@ -222,3 +250,9 @@ meta_exit (MetaExitCode code)
   exit (code);
 }
 
+void
+meta_restart (void)
+{
+  meta_restart_after_quit = TRUE;
+  meta_quit (META_EXIT_SUCCESS);
+}
diff --git a/src/main.h b/src/main.h
index a5db634..cda080f 100644
--- a/src/main.h
+++ b/src/main.h
@@ -36,6 +36,8 @@ void meta_exit (MetaExitCode code);
 /* g_main_quit() then fall out of main() */
 void meta_quit (MetaExitCode code);
 
+void meta_restart (void);
+
 GMainLoop* meta_get_main_loop (void);
 
 #endif
diff --git a/src/tools/Makefile.am b/src/tools/Makefile.am
new file mode 100644
index 0000000..0db4a69
--- /dev/null
+++ b/src/tools/Makefile.am
@@ -0,0 +1,9 @@
+
+INCLUDES=@METACITY_RESTART_CFLAGS@
+
+metacity_restart_SOURCES= 				\
+	metacity-restart.c
+
+bin_PROGRAMS=metacity-restart
+
+metacity_restart_LDADD= @METACITY_RESTART_LIBS@
diff --git a/src/tools/metacity-restart.c b/src/tools/metacity-restart.c
new file mode 100644
index 0000000..c1eacba
--- /dev/null
+++ b/src/tools/metacity-restart.c
@@ -0,0 +1,56 @@
+/* Metacity restart app */
+
+/* 
+ * Copyright (C) 2001 Havoc Pennington
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <gtk/gtk.h>
+#include <gdk/gdkx.h>
+
+int
+main (int argc, char **argv)
+{
+  XEvent xev;
+  
+  gtk_init (&argc, &argv);
+  
+  xev.xclient.type = ClientMessage;
+  xev.xclient.serial = 0;
+  xev.xclient.send_event = True;
+  xev.xclient.display = gdk_display;
+  xev.xclient.window = gdk_x11_get_default_root_xwindow ();
+  xev.xclient.message_type = XInternAtom (gdk_display,
+                                          "_METACITY_RESTART_MESSAGE",
+                                          False);
+  xev.xclient.format = 32;
+  xev.xclient.data.l[0] = 0;
+  xev.xclient.data.l[1] = 0;
+  xev.xclient.data.l[2] = 0;
+
+  XSendEvent (gdk_display,
+              gdk_x11_get_default_root_xwindow (),
+              False,
+	      SubstructureRedirectMask | SubstructureNotifyMask,
+	      &xev);
+
+  XFlush (gdk_display);
+  XSync (gdk_display, False);
+
+  return 0;
+}
+