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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
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* Copyright (C) 2006, 2010 Novell, Inc.
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* Copyright (C) 2008 Red Hat, Inc.
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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#include "gsm-session-fill.h"
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#include "gsm-system.h"
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#include "gsm-manager.h"
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#include "gsm-process-helper.h"
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#define GSM_KEYFILE_SESSION_GROUP "GNOME Session"
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#define GSM_KEYFILE_RUNNABLE_KEY "IsRunnableHelper"
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#define GSM_KEYFILE_FALLBACK_KEY "FallbackSession"
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#define GSM_KEYFILE_REQUIRED_COMPONENTS_KEY "RequiredComponents"
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/* See https://bugzilla.gnome.org/show_bug.cgi?id=641992 for discussion */
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#define GSM_RUNNABLE_HELPER_TIMEOUT 3000 /* ms */
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typedef void (*GsmFillHandleComponent) (const char *component,
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handle_required_components (GKeyFile *keyfile,
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gboolean look_in_saved_session,
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GsmFillHandleComponent callback,
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char **required_components;
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g_assert (keyfile != NULL);
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g_assert (callback != NULL);
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required_components = g_key_file_get_string_list (keyfile,
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GSM_KEYFILE_SESSION_GROUP,
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GSM_KEYFILE_REQUIRED_COMPONENTS_KEY,
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if (!required_components)
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for (i = 0; required_components[i] != NULL; i++) {
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app_path = gsm_util_find_desktop_file_for_app_name (required_components[i],
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look_in_saved_session, TRUE);
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callback (required_components[i], app_path, user_data);
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g_strfreev (required_components);
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check_required_components_helper (const char *component,
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gboolean *error = user_data;
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if (app_path == NULL) {
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g_warning ("Unable to find required component '%s'", component);
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check_required (GKeyFile *keyfile)
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gboolean error = FALSE;
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g_debug ("fill: *** Checking required components");
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handle_required_components (keyfile, FALSE,
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check_required_components_helper, &error);
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g_debug ("fill: *** Done checking required components");
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maybe_load_saved_session_apps (GsmManager *manager)
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system = gsm_get_system ();
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is_login = gsm_system_is_login_session (system);
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g_object_unref (system);
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gsm_manager_add_autostart_apps_from_dir (manager, gsm_util_get_saved_session_dir ());
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append_required_components_helper (const char *component,
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const char *app_path,
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GsmManager *manager = user_data;
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if (app_path == NULL)
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g_warning ("Unable to find required component '%s'", component);
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gsm_manager_add_required_app (manager, app_path, NULL);
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load_standard_apps (GsmManager *manager,
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g_debug ("fill: *** Adding required components");
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handle_required_components (keyfile, !gsm_manager_get_failsafe (manager),
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append_required_components_helper, manager);
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g_debug ("fill: *** Done adding required components");
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if (!gsm_manager_get_failsafe (manager)) {
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char **autostart_dirs;
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autostart_dirs = gsm_util_get_autostart_dirs ();
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if (g_getenv ("GNOME_SESSION_SAVE") != NULL)
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maybe_load_saved_session_apps (manager);
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for (i = 0; autostart_dirs[i]; i++) {
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gsm_manager_add_autostart_apps_from_dir (manager,
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g_strfreev (autostart_dirs);
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get_session_keyfile_if_valid (const char *path)
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g_debug ("fill: *** Looking if %s is a valid session file", path);
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keyfile = g_key_file_new ();
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if (!g_key_file_load_from_file (keyfile, path, G_KEY_FILE_NONE, NULL)) {
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g_debug ("Cannot use session '%s': non-existing or invalid file.", path);
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if (!g_key_file_has_group (keyfile, GSM_KEYFILE_SESSION_GROUP)) {
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g_warning ("Cannot use session '%s': no '%s' group.", path, GSM_KEYFILE_SESSION_GROUP);
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/* check that we do have some required components */
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list = g_key_file_get_string_list (keyfile,
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GSM_KEYFILE_SESSION_GROUP,
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GSM_KEYFILE_REQUIRED_COMPONENTS_KEY,
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g_warning ("Session '%s': no component in the session.", path);
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g_key_file_free (keyfile);
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* find_valid_session_keyfile:
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* @session: name of session
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* We look for the session file in XDG_CONFIG_HOME, XDG_CONFIG_DIRS and
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* XDG_DATA_DIRS. This enables users and sysadmins to override a specific
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* session that is shipped in XDG_DATA_DIRS.
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find_valid_session_keyfile (const char *session)
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const char * const *system_config_dirs;
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const char * const *system_data_dirs;
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dirs = g_ptr_array_new ();
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g_ptr_array_add (dirs, (gpointer) g_get_user_config_dir ());
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system_config_dirs = g_get_system_config_dirs ();
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for (i = 0; system_config_dirs[i]; i++)
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g_ptr_array_add (dirs, (gpointer) system_config_dirs[i]);
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system_data_dirs = g_get_system_data_dirs ();
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for (i = 0; system_data_dirs[i]; i++)
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g_ptr_array_add (dirs, (gpointer) system_data_dirs[i]);
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basename = g_strdup_printf ("%s.session", session);
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for (i = 0; i < dirs->len; i++) {
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path = g_build_filename (dirs->pdata[i], "gnome-session", "sessions", basename, NULL);
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keyfile = get_session_keyfile_if_valid (path);
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g_ptr_array_free (dirs, TRUE);
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get_session_keyfile (const char *session,
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char **actual_session,
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gboolean *is_fallback)
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gboolean session_runnable;
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GError *error = NULL;
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*actual_session = NULL;
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g_debug ("fill: *** Getting session '%s'", session);
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keyfile = find_valid_session_keyfile (session);
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session_runnable = TRUE;
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value = g_key_file_get_string (keyfile,
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GSM_KEYFILE_SESSION_GROUP, GSM_KEYFILE_RUNNABLE_KEY,
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if (!IS_STRING_EMPTY (value)) {
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g_debug ("fill: *** Launching helper '%s' to know if session is runnable", value);
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session_runnable = gsm_process_helper (value, GSM_RUNNABLE_HELPER_TIMEOUT, &error);
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if (!session_runnable) {
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g_warning ("Session '%s' runnable check failed: %s", session,
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g_clear_error (&error);
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if (session_runnable) {
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session_runnable = check_required (keyfile);
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if (session_runnable) {
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*actual_session = g_strdup (session);
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*is_fallback = FALSE;
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g_debug ("fill: *** Session is not runnable");
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/* We can't run this session, so try to use the fallback */
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value = g_key_file_get_string (keyfile,
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GSM_KEYFILE_SESSION_GROUP, GSM_KEYFILE_FALLBACK_KEY,
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g_key_file_free (keyfile);
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if (!IS_STRING_EMPTY (value)) {
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keyfile = get_session_keyfile (value, actual_session, NULL);
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gsm_session_fill (GsmManager *manager,
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gboolean is_fallback;
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char *actual_session;
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keyfile = get_session_keyfile (session, &actual_session, &is_fallback);
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_gsm_manager_set_active_session (manager, actual_session, is_fallback);
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g_free (actual_session);
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load_standard_apps (manager, keyfile);
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g_key_file_free (keyfile);