summaryrefslogtreecommitdiffstats
path: root/tools/gnome-session-ctl.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/gnome-session-ctl.c')
-rw-r--r--tools/gnome-session-ctl.c304
1 files changed, 304 insertions, 0 deletions
diff --git a/tools/gnome-session-ctl.c b/tools/gnome-session-ctl.c
new file mode 100644
index 0000000..eb9d6b5
--- /dev/null
+++ b/tools/gnome-session-ctl.c
@@ -0,0 +1,304 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ * gnome-session-tl.c - Small utility program to manage gnome systemd session.
+
+ Copyright (C) 1998 Tom Tromey
+ Copyright (C) 2008,2019 Red Hat, Inc.
+
+ 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, 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#include <locale.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <systemd/sd-daemon.h>
+
+#include <glib.h>
+#include <glib-unix.h>
+#include <glib/gstdio.h>
+#include <glib/gi18n.h>
+#include <gio/gio.h>
+
+#define GSM_SERVICE_DBUS "org.gnome.SessionManager"
+#define GSM_PATH_DBUS "/org/gnome/SessionManager"
+#define GSM_INTERFACE_DBUS "org.gnome.SessionManager"
+
+#define SYSTEMD_DBUS "org.freedesktop.systemd1"
+#define SYSTEMD_PATH_DBUS "/org/freedesktop/systemd1"
+#define SYSTEMD_INTERFACE_DBUS "org.freedesktop.systemd1.Manager"
+
+static GDBusConnection *
+get_session_bus (void)
+{
+ g_autoptr(GError) error = NULL;
+ GDBusConnection *bus;
+
+ bus = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);
+
+ if (bus == NULL)
+ g_warning ("Couldn't connect to session bus: %s", error->message);
+
+ return bus;
+}
+
+static void
+do_signal_init (void)
+{
+ g_autoptr(GDBusConnection) connection = NULL;
+ g_autoptr(GVariant) reply = NULL;
+ g_autoptr(GError) error = NULL;
+
+ connection = get_session_bus ();
+ if (connection == NULL)
+ return;
+
+ reply = g_dbus_connection_call_sync (connection,
+ GSM_SERVICE_DBUS,
+ GSM_PATH_DBUS,
+ GSM_INTERFACE_DBUS,
+ "Initialized",
+ NULL,
+ NULL,
+ G_DBUS_CALL_FLAGS_NO_AUTO_START,
+ -1, NULL, &error);
+
+ if (error != NULL)
+ g_warning ("Failed to call signal initialization: %s",
+ error->message);
+}
+
+static void
+do_start_unit (const gchar *unit, const char *mode)
+{
+ g_autoptr(GDBusConnection) connection = NULL;
+ g_autoptr(GVariant) reply = NULL;
+ g_autoptr(GError) error = NULL;
+
+ connection = get_session_bus ();
+ if (connection == NULL)
+ return;
+
+ reply = g_dbus_connection_call_sync (connection,
+ SYSTEMD_DBUS,
+ SYSTEMD_PATH_DBUS,
+ SYSTEMD_INTERFACE_DBUS,
+ "StartUnit",
+ g_variant_new ("(ss)",
+ unit,
+ mode),
+ NULL,
+ G_DBUS_CALL_FLAGS_NO_AUTO_START,
+ -1, NULL, &error);
+
+ if (error != NULL)
+ g_warning ("Failed to start shutdown target: %s",
+ error->message);
+}
+
+static void
+do_restart_dbus (void)
+{
+ g_autoptr(GDBusConnection) connection = NULL;
+ g_autoptr(GVariant) reply = NULL;
+ g_autoptr(GError) error = NULL;
+
+ connection = get_session_bus ();
+ if (connection == NULL)
+ return;
+
+ reply = g_dbus_connection_call_sync (connection,
+ SYSTEMD_DBUS,
+ SYSTEMD_PATH_DBUS,
+ SYSTEMD_INTERFACE_DBUS,
+ "StopUnit",
+ g_variant_new ("(ss)",
+ "dbus.service",
+ "fail"),
+ NULL,
+ G_DBUS_CALL_FLAGS_NO_AUTO_START,
+ -1, NULL, &error);
+
+ if (error != NULL)
+ g_warning ("Failed to restart DBus service: %s",
+ error->message);
+}
+
+typedef struct {
+ GMainLoop *loop;
+ gint fifo_fd;
+} MonitorLeader;
+
+static gboolean
+leader_term_or_int_signal_cb (gpointer user_data)
+{
+ MonitorLeader *data = (MonitorLeader*) user_data;
+
+ g_main_quit (data->loop);
+
+ return G_SOURCE_REMOVE;
+}
+
+static gboolean
+leader_fifo_io_cb (gint fd,
+ GIOCondition condition,
+ gpointer user_data)
+{
+ MonitorLeader *data = (MonitorLeader*) user_data;
+
+ sd_notify (0, "STOPPING=1");
+
+ if (condition | G_IO_IN) {
+ char buf[1];
+ read (data->fifo_fd, buf, 1);
+ }
+ if (condition | G_IO_HUP) {
+ g_main_loop_quit (data->loop);
+ }
+
+ return G_SOURCE_CONTINUE;
+}
+
+/**
+ * do_monitor_leader:
+ *
+ * Function to monitor the leader to ensure clean session shutdown and
+ * propagation of this information to/from loginctl/GDM.
+ * See main.c systemd_leader_run() for more information.
+ */
+static void
+do_monitor_leader (void)
+{
+ MonitorLeader data;
+ g_autofree char *fifo_name = NULL;
+ int res;
+
+ data.loop = g_main_loop_new (NULL, TRUE);
+
+ fifo_name = g_strdup_printf ("%s/gnome-session-leader-fifo",
+ g_get_user_runtime_dir ());
+ res = mkfifo (fifo_name, 0666);
+ if (res < 0 && errno != EEXIST)
+ g_warning ("Error creating FIFO: %m");
+
+ data.fifo_fd = g_open (fifo_name, O_RDONLY | O_CLOEXEC, 0666);
+ if (data.fifo_fd >= 0) {
+ struct stat buf;
+
+ res = fstat (data.fifo_fd, &buf);
+ if (res < 0) {
+ g_warning ("Unable to monitor session leader: stat failed with error %m");
+ sd_notifyf (0, "STATUS=Unable to monitor session leader: FD is not a FIFO %m");
+ close (data.fifo_fd);
+ data.fifo_fd = -1;
+ } else if (!(buf.st_mode & S_IFIFO)) {
+ g_warning ("Unable to monitor session leader: FD is not a FIFO");
+ sd_notify (0, "STATUS=Unable to monitor session leader: FD is not a FIFO");
+ close (data.fifo_fd);
+ data.fifo_fd = -1;
+ } else {
+ sd_notify (0, "STATUS=Watching session leader");
+ g_unix_fd_add (data.fifo_fd, G_IO_HUP | G_IO_IN, leader_fifo_io_cb, &data);
+ }
+ } else {
+ g_warning ("Unable to monitor session leader: Opening FIFO failed with %m");
+ sd_notifyf (0, "STATUS=Unable to monitor session leader: Opening FIFO failed with %m");
+ }
+
+ g_unix_signal_add (SIGTERM, leader_term_or_int_signal_cb, &data);
+ g_unix_signal_add (SIGINT, leader_term_or_int_signal_cb, &data);
+
+ g_main_loop_run (data.loop);
+
+ g_main_loop_unref (data.loop);
+ /* FD is closed with the application. */
+}
+
+int
+main (int argc, char *argv[])
+{
+ g_autoptr(GError) error = NULL;
+ static gboolean opt_shutdown;
+ static gboolean opt_monitor;
+ static gboolean opt_signal_init;
+ static gboolean opt_restart_dbus;
+ static gboolean opt_exec_stop_check;
+ int conflicting_options;
+ GOptionContext *ctx;
+ static const GOptionEntry options[] = {
+ { "shutdown", '\0', 0, G_OPTION_ARG_NONE, &opt_shutdown, N_("Start gnome-session-shutdown.target"), NULL },
+ { "monitor", '\0', 0, G_OPTION_ARG_NONE, &opt_monitor, N_("Start gnome-session-shutdown.target when receiving EOF or a single byte on stdin"), NULL },
+ { "signal-init", '\0', 0, G_OPTION_ARG_NONE, &opt_signal_init, N_("Signal initialization done to gnome-session"), NULL },
+ { "restart-dbus", '\0', 0, G_OPTION_ARG_NONE, &opt_restart_dbus, N_("Restart dbus.service if it is running"), NULL },
+ { "exec-stop-check", '\0', 0, G_OPTION_ARG_NONE, &opt_exec_stop_check, N_("Run from ExecStopPost to start gnome-session-failed.target on service failure"), NULL },
+ { NULL },
+ };
+
+ /* Initialize the i18n stuff */
+ setlocale (LC_ALL, "");
+ bindtextdomain (GETTEXT_PACKAGE, LOCALE_DIR);
+ bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+ textdomain (GETTEXT_PACKAGE);
+
+ ctx = g_option_context_new ("");
+ g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
+ if (! g_option_context_parse (ctx, &argc, &argv, &error)) {
+ g_warning ("Unable to start: %s", error->message);
+ exit (1);
+ }
+ g_option_context_free (ctx);
+
+ conflicting_options = 0;
+ if (opt_shutdown)
+ conflicting_options++;
+ if (opt_monitor)
+ conflicting_options++;
+ if (opt_signal_init)
+ conflicting_options++;
+ if (opt_restart_dbus)
+ conflicting_options++;
+ if (opt_exec_stop_check)
+ conflicting_options++;
+ if (conflicting_options != 1) {
+ g_printerr (_("Program needs exactly one parameter"));
+ exit (1);
+ }
+
+ sd_notify (0, "READY=1");
+
+ if (opt_signal_init) {
+ do_signal_init ();
+ } else if (opt_restart_dbus) {
+ do_restart_dbus ();
+ } else if (opt_shutdown) {
+ do_start_unit ("gnome-session-shutdown.target", "replace-irreversibly");
+ } else if (opt_monitor) {
+ do_monitor_leader ();
+ do_start_unit ("gnome-session-shutdown.target", "replace-irreversibly");
+ } else if (opt_exec_stop_check) {
+ /* Start failed target if the restart limit was hit */
+ if (g_strcmp0 ("start-limit-hit", g_getenv ("SERVICE_RESULT")) == 0) {
+ do_start_unit ("gnome-session-failed.target", "fail");
+ }
+ } else {
+ g_assert_not_reached ();
+ }
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-19 22:36:36 +0000