2 * Copyright (C) 2014 Canonical, Ltd
3 * Author: Michael Terry <michael.terry@canonical.com>
5 * This program is free software: you can redistribute it and/or modify it under
6 * the terms of the GNU General Public License as published by the Free Software
7 * Foundation, either version 3 of the License, or (at your option) any later
8 * version. See http://www.gnu.org/copyleft/gpl.html the full text of the
15 #include <sys/types.h>
18 #include "configuration.h"
19 #include "shared-data-manager.h"
20 #include "user-list.h"
22 #define NUM_ENUMERATION_FILES 100
24 struct SharedDataManagerPrivate
28 GHashTable *starting_dirs;
33 SharedDataManager *manager;
37 G_DEFINE_TYPE (SharedDataManager, shared_data_manager, G_TYPE_OBJECT);
39 static SharedDataManager *singleton = NULL;
42 shared_data_manager_get_instance (void)
45 singleton = g_object_new (SHARED_DATA_MANAGER_TYPE, NULL);
50 shared_data_manager_cleanup (void)
54 g_object_unref (singleton);
60 delete_unused_user (gpointer key, gpointer value, gpointer user_data)
62 const gchar *user = (const gchar *)key;
65 /* For this operation, we just need a fire and forget rm -rf. Since
66 recursively deleting in GIO is a huge pain in the butt, we'll just drop
69 gchar *path = g_build_filename (USERS_DIR, user, NULL);
70 gchar *quoted_path = g_shell_quote (path);
71 gchar *cmd = g_strdup_printf ("/bin/rm -rf %s", quoted_path);
73 g_spawn_command_line_async (cmd, &error);
75 g_warning ("Could not delete unused user data directory %s: %s", path, error->message);
76 g_clear_error (&error);
84 shared_data_manager_ensure_user_dir (SharedDataManager *manager, const gchar *user)
93 entry = getpwnam (user);
97 path = g_build_filename (USERS_DIR, user, NULL);
98 file = g_file_new_for_path (path);
100 g_debug ("Creating shared data directory %s", path);
102 result = g_file_make_directory (file, NULL, &error);
105 if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_EXISTS))
108 g_warning ("Could not create user data directory %s: %s", path, error->message);
110 g_clear_error (&error);
113 g_object_unref (file);
118 /* Even if the directory already exists, we want to re-affirm the owners
119 because the greeter gid is configuration based and may change between
121 info = g_file_info_new ();
122 g_file_info_set_attribute_uint32 (info, G_FILE_ATTRIBUTE_UNIX_UID, entry->pw_uid);
123 g_file_info_set_attribute_uint32 (info, G_FILE_ATTRIBUTE_UNIX_GID, manager->priv->greeter_gid);
124 g_file_info_set_attribute_uint32 (info, G_FILE_ATTRIBUTE_UNIX_MODE, 0770);
125 result = g_file_set_attributes_from_info (file, info, G_FILE_QUERY_INFO_NONE, NULL, &error);
126 g_object_unref (info);
127 g_object_unref (file);
129 g_warning ("Could not chown user data directory %s: %s", path, error->message);
140 next_user_dirs_cb (GObject *object, GAsyncResult *res, gpointer user_data)
142 GFileEnumerator *enumerator = G_FILE_ENUMERATOR (object);
143 SharedDataManager *manager = SHARED_DATA_MANAGER (user_data);
145 GError *error = NULL;
147 GList *files = g_file_enumerator_next_files_finish (enumerator, res, &error);
150 g_warning ("Could not enumerate user data directory %s: %s", USERS_DIR, error->message);
151 g_clear_error (&error);
152 g_object_unref (manager);
156 for (link = files; link; link = link->next)
158 GFileInfo *info = link->data;
159 g_hash_table_insert (manager->priv->starting_dirs, g_strdup (g_file_info_get_name (info)), NULL);
164 g_list_free_full (files, g_object_unref);
165 g_file_enumerator_next_files_async (enumerator, NUM_ENUMERATION_FILES, G_PRIORITY_DEFAULT, NULL, next_user_dirs_cb, manager);
169 // We've finally assembled all the initial directories. Now let's
170 // iterate the current users and as we go, remove the users from the
171 // starting_dirs hash and thus see which users are obsolete.
172 GList *users = common_user_list_get_users (common_user_list_get_instance ());
173 for (link = users; link; link = link->next)
175 CommonUser *user = link->data;
176 g_hash_table_remove (manager->priv->starting_dirs, common_user_get_name (user));
178 g_hash_table_foreach (manager->priv->starting_dirs, delete_unused_user, manager);
179 g_hash_table_destroy (manager->priv->starting_dirs);
180 manager->priv->starting_dirs = NULL;
182 g_object_unref (manager);
187 list_user_dirs_cb (GObject *object, GAsyncResult *res, gpointer user_data)
189 GFile *file = G_FILE (object);
190 SharedDataManager *manager = SHARED_DATA_MANAGER (user_data);
191 GFileEnumerator *enumerator;
192 GError *error = NULL;
194 enumerator = g_file_enumerate_children_finish (file, res, &error);
196 g_warning ("Could not enumerate user data directory %s: %s", USERS_DIR, error->message);
197 g_clear_error (&error);
200 g_object_unref (manager);
204 manager->priv->starting_dirs = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
205 g_file_enumerator_next_files_async (enumerator, NUM_ENUMERATION_FILES,
206 G_PRIORITY_DEFAULT, NULL,
207 next_user_dirs_cb, manager);
211 user_removed_cb (CommonUserList *list, CommonUser *user, SharedDataManager *manager)
213 delete_unused_user ((gpointer) common_user_get_name (user), NULL, manager);
217 shared_data_manager_start (SharedDataManager *manager)
221 /* Grab list of all current directories, so we know if any exist that we no longer need. */
222 file = g_file_new_for_path (USERS_DIR);
223 g_file_enumerate_children_async (file, G_FILE_ATTRIBUTE_STANDARD_NAME,
224 G_FILE_QUERY_INFO_NONE,
225 G_PRIORITY_DEFAULT, NULL,
226 list_user_dirs_cb, g_object_ref (manager));
227 g_object_unref (file);
229 /* And listen for user removals. */
230 g_signal_connect (common_user_list_get_instance (), "user-removed", G_CALLBACK (user_removed_cb), manager);
234 shared_data_manager_init (SharedDataManager *manager)
236 struct passwd *greeter_entry;
238 manager->priv = G_TYPE_INSTANCE_GET_PRIVATE (manager, SHARED_DATA_MANAGER_TYPE, SharedDataManagerPrivate);
240 /* Grab current greeter-user gid */
241 manager->priv->greeter_user = config_get_string (config_get_instance (), "LightDM", "greeter-user");
242 greeter_entry = getpwnam (manager->priv->greeter_user);
244 manager->priv->greeter_gid = greeter_entry->pw_gid;
248 shared_data_manager_dispose (GObject *object)
250 SharedDataManager *self = SHARED_DATA_MANAGER (object);
252 /* Should also cancel outstanding GIO operations, but whatever, let them do their thing. */
254 g_signal_handlers_disconnect_by_data (common_user_list_get_instance (), self);
256 G_OBJECT_CLASS (shared_data_manager_parent_class)->dispose (object);
260 shared_data_manager_finalize (GObject *object)
262 SharedDataManager *self = SHARED_DATA_MANAGER (object);
264 if (self->priv->starting_dirs)
265 g_hash_table_destroy (self->priv->starting_dirs);
267 g_free (self->priv->greeter_user);
269 G_OBJECT_CLASS (shared_data_manager_parent_class)->finalize (object);
273 shared_data_manager_class_init (SharedDataManagerClass *klass)
275 GObjectClass *object_class = G_OBJECT_CLASS (klass);
277 object_class->dispose = shared_data_manager_dispose;
278 object_class->finalize = shared_data_manager_finalize;
280 g_type_class_add_private (klass, sizeof (SharedDataManagerPrivate));