** Add basic support for crash recovery

2007-12-05  Srinivasa Ragavan  <sragavan@novell.com>

	** Add basic support for crash recovery

	* apps_evolution_shell.schemas.in: Keys to recover and recovery dialog.
	* e-shell.c: (e_shell_quit): Delete the lock while quitting.
	* main.c: (show_recovery_warning), (idle_cb): Create lock and also show 
	the warning dialog.


svn path=/trunk/; revision=34652

3 files changed, 60 insertions, 0 deletions

diff --git a/e-util/ChangeLog b/e-util/ChangeLog
index 06a841a3d7..1cd661efc8 100644
--- a/e-util/ChangeLog
+++ b/e-util/ChangeLog
@@ -1,3 +1,10 @@
+2007-12-05  Srinivasa Ragavan  <sragavan@novell.com>
+
+	* e-util.c: (get_lock_filename), (e_file_lock_create),
+	(e_file_lock_destroy), (e_file_lock_exists): Add utility functions for 
+	startup-running lock create, check and delete.
+	* e-util.h:
+
 2007-12-04  Milan Crha  <mcrha@redhat.com>
 
 	** Part of fix for bug #500210
diff --git a/e-util/e-util.c b/e-util/e-util.c
index 625c617a8b..b1634bcfff 100644
--- a/e-util/e-util.c
+++ b/e-util/e-util.c
@@ -1017,3 +1017,52 @@ e_file_get_save_path (void)
 	return (uri);
 }
 
+/* Evolution Locks for crash recovery */
+
+#define LOCK_FILE ".running"
+
+static const gchar *
+get_lock_filename (void)
+{
+	static gchar *filename = NULL;
+
+	if (G_UNLIKELY (filename == NULL))
+		filename = g_build_filename (g_get_home_dir (), ".evolution", LOCK_FILE, NULL);
+
+	return filename;
+}
+
+gboolean
+e_file_lock_create ()
+{
+	const char *fname = get_lock_filename ();
+	gboolean status = FALSE;
+
+	int fd = g_creat (fname, S_IRUSR|S_IWUSR);
+	if (fd == -1){
+		g_warning ("Lock file '%s' creation failed, error %d\n", fname, errno);
+	} else {
+		status = TRUE;
+		close (fd);
+	}
+
+	return status;
+}
+
+void
+e_file_lock_destroy ()
+{
+	const char *fname = get_lock_filename ();
+
+	if (g_unlink (fname) == -1){
+		g_warning ("Lock destroy: failed to unlink file '%s'!",fname);
+	}
+}
+
+gboolean 
+e_file_lock_exists ()
+{
+	const char *fname = get_lock_filename ();
+
+	return g_file_test (fname, G_FILE_TEST_EXISTS);
+}
diff --git a/e-util/e-util.h b/e-util/e-util.h
index e3774c5852..b37f2abdb5 100644
--- a/e-util/e-util.h
+++ b/e-util/e-util.h
@@ -111,6 +111,10 @@ void		e_file_update_save_path		(gchar *uri,
 						 gboolean free);
 gchar *		e_file_get_save_path		(void);
 
+gboolean	e_file_lock_create ();
+void		e_file_lock_destroy ();
+gboolean 	e_file_lock_exists ();
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */