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/* livepatch-tray.c
* Copyright (C) 2019 Canonical Ltd
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor
* Boston, MA 02110-1301 USA.
*/
#include <gio/gdesktopappinfo.h>
#include <glib.h>
#include "update-notifier.h"
#include "livepatch-tray.h"
#include "livepatch-utils.h"
#include "trayappletui.h"
#define LIVEPATCH_COMMON_DIRECTORY "/var/snap/canonical-livepatch/common"
#define LIVEPATCH_SNAP_DIRECTORY "/snap/canonical-livepatch"
#define TIMEOUT_SECONDS_DELAY 2
typedef struct _LivepatchTrayAppletPriv LivepatchTrayAppletPriv;
struct _LivepatchTrayAppletPriv
{
GtkWidget *menuitem_enabled;
GtkWidget *menuitem_desc;
GFileMonitor *common_dir_monitor;
GFileMonitor *snap_dir_monitor;
guint timeout_id;
};
static void
on_settings_menuitem_activated(GObject *self, gpointer user_data)
{
g_autoptr(GDesktopAppInfo) info = NULL;
g_autoptr(GdkAppLaunchContext) context = NULL;
g_autoptr(GError) error = NULL;
info = g_desktop_app_info_new(LIVEPATCH_DESKTOP_FILE);
if (info == NULL)
{
g_warning("Could not find application '%s'", LIVEPATCH_DESKTOP_FILE);
return;
}
context = gdk_display_get_app_launch_context(gdk_display_get_default());
if (!g_app_info_launch(G_APP_INFO(info), NULL,
G_APP_LAUNCH_CONTEXT(context), &error))
{
g_warning("Could not launch application '%s'", LIVEPATCH_DESKTOP_FILE);
}
}
static void
livepatch_trayicon_create_menu(TrayApplet *ta)
{
LivepatchTrayAppletPriv *priv = (LivepatchTrayAppletPriv *) ta->user_data;
GtkWidget *menuitem;
ta->menu = gtk_menu_new();
priv->menuitem_enabled = gtk_menu_item_new();
gtk_widget_set_sensitive(priv->menuitem_enabled, FALSE);
gtk_menu_shell_append(GTK_MENU_SHELL(ta->menu), priv->menuitem_enabled);
priv->menuitem_desc = gtk_menu_item_new();
gtk_widget_set_sensitive(priv->menuitem_desc, FALSE);
gtk_menu_shell_append(GTK_MENU_SHELL(ta->menu), priv->menuitem_desc);
menuitem = gtk_separator_menu_item_new();
gtk_menu_shell_append(GTK_MENU_SHELL(ta->menu), menuitem);
menuitem = gtk_menu_item_new_with_label(_("Livepatch Settings…"));
gtk_menu_shell_append(GTK_MENU_SHELL(ta->menu), menuitem);
g_signal_connect(G_OBJECT(menuitem), "activate",
G_CALLBACK(on_settings_menuitem_activated), ta);
gtk_widget_show_all(ta->menu);
}
static gboolean
check_livepatch(TrayApplet *ta)
{
LivepatchTrayAppletPriv *priv = (LivepatchTrayAppletPriv *) ta->user_data;
gboolean show_status_icon;
g_autofree gchar *check_state = NULL;
g_autofree gchar *state = NULL;
g_autoptr(GError) error = NULL;
show_status_icon = g_settings_get_boolean(ta->un->settings,
SETTINGS_KEY_SHOW_LIVEPATCH_ICON);
if (!show_status_icon ||
!livepatch_is_supported() ||
!livepatch_is_running ())
{
tray_applet_ui_set_visible(ta, FALSE);
priv->timeout_id = 0;
return G_SOURCE_REMOVE;
}
tray_applet_ui_set_visible(ta, TRUE);
gtk_menu_item_set_label(GTK_MENU_ITEM(priv->menuitem_enabled),
_("Livepatch is on"));
check_state = livepatch_get_check_state(&error);
if (check_state == NULL)
g_warning("Cannot get Livepatch check-state: %s", error->message);
state = livepatch_get_state(&error);
if (state == NULL)
g_warning("Cannot get Livepatch state: %s", error->message);
if (!g_strcmp0(check_state, "checked") &&
(!g_strcmp0(state, "applied") || !g_strcmp0(state, "nothing-to-apply")))
{
gssize num_fixes;
g_autofree gchar *label = NULL;
tray_applet_ui_set_icon(ta, "livepatch-on");
num_fixes = livepatch_get_num_fixes(&error);
if (num_fixes == -1)
{
g_warning("Cannot get applied Livepatch fixes: %s", error->message);
num_fixes = 0;
}
gtk_widget_set_visible(priv->menuitem_desc, TRUE);
if (num_fixes == 0)
label = g_strdup(_("No current updates"));
else
label = g_strdup_printf(ngettext("%" G_GSSIZE_FORMAT " current update",
"%" G_GSSIZE_FORMAT " current updates",
num_fixes), num_fixes);
gtk_menu_item_set_label(GTK_MENU_ITEM(priv->menuitem_desc), label);
}
else if (!g_strcmp0(check_state, "needs-check") ||
!g_strcmp0(state, "unapplied") ||
!g_strcmp0(state, "applying"))
{
/* Check livepatch status again */
return G_SOURCE_CONTINUE;
}
else
{
tray_applet_ui_set_icon(ta, "livepatch-warning");
if (check_state == NULL || !g_strcmp0(check_state, "check-failed"))
{
gtk_menu_item_set_label(GTK_MENU_ITEM(priv->menuitem_desc),
_("An error occured when checking for Livepatch updates."));
}
else
{
gtk_menu_item_set_label(GTK_MENU_ITEM(priv->menuitem_desc),
_("An error occured when applying Livepatch updates."));
}
}
priv->timeout_id = 0;
return G_SOURCE_REMOVE;
}
static void
gsettings_visibility_changed_cb(GSettings *settings,
gchar *key,
gpointer user_data)
{
TrayApplet *ta = (TrayApplet *) user_data;
LivepatchTrayAppletPriv *priv = (LivepatchTrayAppletPriv *) ta->user_data;
if (priv->timeout_id <= 0)
priv->timeout_id = g_timeout_add_seconds(0, (GSourceFunc) check_livepatch, ta);
}
static void
livepatch_directory_changed_cb(GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
TrayApplet *ta = (TrayApplet *) user_data;
LivepatchTrayAppletPriv *priv = (LivepatchTrayAppletPriv *) ta->user_data;
if (priv->timeout_id <= 0)
priv->timeout_id = g_timeout_add_seconds(TIMEOUT_SECONDS_DELAY,
(GSourceFunc) check_livepatch, ta);
}
void
livepatch_tray_icon_init(TrayApplet *ta)
{
g_autoptr(GFile) livepatch_common_dir = NULL;
g_autoptr(GFile) livepatch_snap_dir = NULL;
g_autoptr(GFileMonitor) common_dir_monitor = NULL;
g_autoptr(GFileMonitor) snap_dir_monitor = NULL;
g_autoptr(GError) error = NULL;
LivepatchTrayAppletPriv *priv;
if (!livepatch_is_supported())
return;
if (!livepatch_has_settings_ui())
{
g_warning("There is no graphical application installed to manage "
"Livepatch. The livepatch status icon will not be displayed.");
return;
}
/* Monitor the directory LIVEPATCH_COMMON_DIRECTORY for changes to update
the status of the indicator. */
livepatch_common_dir = g_file_new_for_path(LIVEPATCH_COMMON_DIRECTORY);
common_dir_monitor = g_file_monitor_directory(livepatch_common_dir,
G_FILE_MONITOR_NONE,
NULL, &error);
if (common_dir_monitor == NULL)
{
g_warning("Couldn't create directory monitor on %s. Error: %s\n",
LIVEPATCH_COMMON_DIRECTORY, error->message);
return;
}
/* We also need to monitor the directory LIVEPATCH_SNAP_DIRECTORY in order to
detect if the snap was enabled/disabled. This consider the case
canonical-livepatch is enabled but the snap is disabled. */
livepatch_snap_dir = g_file_new_for_path(LIVEPATCH_SNAP_DIRECTORY);
snap_dir_monitor = g_file_monitor_directory(livepatch_snap_dir,
G_FILE_MONITOR_WATCH_MOUNTS,
NULL, &error);
if (snap_dir_monitor == NULL)
{
g_warning("Couldn't create directory monitor on %s. Error: %s\n",
LIVEPATCH_SNAP_DIRECTORY, error->message);
return;
}
priv = g_new0(LivepatchTrayAppletPriv, 1);
priv->common_dir_monitor = g_steal_pointer(&common_dir_monitor);
priv->snap_dir_monitor = g_steal_pointer(&snap_dir_monitor);
ta->user_data = priv;
tray_applet_ui_ensure(ta);
/* Menu initialization */
livepatch_trayicon_create_menu(ta);
tray_applet_ui_set_menu(ta, ta->menu);
g_signal_connect(ta->un->settings,
"changed::"SETTINGS_KEY_SHOW_LIVEPATCH_ICON,
G_CALLBACK(gsettings_visibility_changed_cb), ta);
g_signal_connect(priv->common_dir_monitor,
"changed",
G_CALLBACK(livepatch_directory_changed_cb), ta);
g_signal_connect(priv->snap_dir_monitor,
"changed",
G_CALLBACK(livepatch_directory_changed_cb), ta);
/* We always run check_livepatch in a timeout beacuse this allows us to easily
check again the status of livepatch if it is in a transistion state (e.g.
it is downloading the patches or applying them, etc.) */
priv->timeout_id = g_timeout_add_seconds(TIMEOUT_SECONDS_DELAY,
(GSourceFunc) check_livepatch, ta);
}
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