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)
52 g_clear_object (&singleton);
56 delete_unused_user (gpointer key, gpointer value, gpointer user_data)
58 const gchar *user = (const gchar *)key;
61 /* For this operation, we just need a fire and forget rm -rf. Since
62 recursively deleting in GIO is a huge pain in the butt, we'll just drop
65 gchar *path = g_build_filename (USERS_DIR, user, NULL);
66 gchar *quoted_path = g_shell_quote (path);
67 gchar *cmd = g_strdup_printf ("/bin/rm -rf %s", quoted_path);
69 g_spawn_command_line_async (cmd, &error);
71 g_warning ("Could not delete unused user data directory %s: %s", path, error->message);
72 g_clear_error (&error);
80 shared_data_manager_ensure_user_dir (SharedDataManager *manager, const gchar *user)
89 entry = getpwnam (user);
93 path = g_build_filename (USERS_DIR, user, NULL);
94 file = g_file_new_for_path (path);
96 g_debug ("Creating shared data directory %s", path);
98 result = g_file_make_directory (file, NULL, &error);
101 if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_EXISTS))
104 g_warning ("Could not create user data directory %s: %s", path, error->message);
106 g_clear_error (&error);
109 g_object_unref (file);
114 /* Even if the directory already exists, we want to re-affirm the owners
115 because the greeter gid is configuration based and may change between
117 info = g_file_info_new ();
118 g_file_info_set_attribute_uint32 (info, G_FILE_ATTRIBUTE_UNIX_UID, entry->pw_uid);
119 g_file_info_set_attribute_uint32 (info, G_FILE_ATTRIBUTE_UNIX_GID, manager->priv->greeter_gid);
120 g_file_info_set_attribute_uint32 (info, G_FILE_ATTRIBUTE_UNIX_MODE, 0770);
121 result = g_file_set_attributes_from_info (file, info, G_FILE_QUERY_INFO_NONE, NULL, &error);
122 g_object_unref (info);
123 g_object_unref (file);
125 g_warning ("Could not chown user data directory %s: %s", path, error->message);
136 next_user_dirs_cb (GObject *object, GAsyncResult *res, gpointer user_data)
138 GFileEnumerator *enumerator = G_FILE_ENUMERATOR (object);
139 SharedDataManager *manager = SHARED_DATA_MANAGER (user_data);
141 GError *error = NULL;
143 GList *files = g_file_enumerator_next_files_finish (enumerator, res, &error);
146 g_warning ("Could not enumerate user data directory %s: %s", USERS_DIR, error->message);
147 g_clear_error (&error);
148 g_object_unref (manager);
152 for (link = files; link; link = link->next)
154 GFileInfo *info = link->data;
155 g_hash_table_insert (manager->priv->starting_dirs, g_strdup (g_file_info_get_name (info)), NULL);
160 g_list_free_full (files, g_object_unref);
161 g_file_enumerator_next_files_async (enumerator, NUM_ENUMERATION_FILES, G_PRIORITY_DEFAULT, NULL, next_user_dirs_cb, manager);
165 // We've finally assembled all the initial directories. Now let's
166 // iterate the current users and as we go, remove the users from the
167 // starting_dirs hash and thus see which users are obsolete.
168 GList *users = common_user_list_get_users (common_user_list_get_instance ());
169 for (link = users; link; link = link->next)
171 CommonUser *user = link->data;
172 g_hash_table_remove (manager->priv->starting_dirs, common_user_get_name (user));
174 g_hash_table_foreach (manager->priv->starting_dirs, delete_unused_user, manager);
175 g_hash_table_destroy (manager->priv->starting_dirs);
176 manager->priv->starting_dirs = NULL;
178 g_object_unref (manager);
183 list_user_dirs_cb (GObject *object, GAsyncResult *res, gpointer user_data)
185 GFile *file = G_FILE (object);
186 SharedDataManager *manager = SHARED_DATA_MANAGER (user_data);
187 GFileEnumerator *enumerator;
188 GError *error = NULL;
190 enumerator = g_file_enumerate_children_finish (file, res, &error);
192 g_warning ("Could not enumerate user data directory %s: %s", USERS_DIR, error->message);
193 g_clear_error (&error);
196 g_object_unref (manager);
200 manager->priv->starting_dirs = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
201 g_file_enumerator_next_files_async (enumerator, NUM_ENUMERATION_FILES,
202 G_PRIORITY_DEFAULT, NULL,
203 next_user_dirs_cb, manager);
207 user_removed_cb (CommonUserList *list, CommonUser *user, SharedDataManager *manager)
209 delete_unused_user ((gpointer) common_user_get_name (user), NULL, manager);
213 shared_data_manager_start (SharedDataManager *manager)
217 /* Grab list of all current directories, so we know if any exist that we no longer need. */
218 file = g_file_new_for_path (USERS_DIR);
219 g_file_enumerate_children_async (file, G_FILE_ATTRIBUTE_STANDARD_NAME,
220 G_FILE_QUERY_INFO_NONE,
221 G_PRIORITY_DEFAULT, NULL,
222 list_user_dirs_cb, g_object_ref (manager));
223 g_object_unref (file);
225 /* And listen for user removals. */
226 g_signal_connect (common_user_list_get_instance (), USER_LIST_SIGNAL_USER_REMOVED, G_CALLBACK (user_removed_cb), manager);
230 shared_data_manager_init (SharedDataManager *manager)
232 struct passwd *greeter_entry;
234 manager->priv = G_TYPE_INSTANCE_GET_PRIVATE (manager, SHARED_DATA_MANAGER_TYPE, SharedDataManagerPrivate);
236 /* Grab current greeter-user gid */
237 manager->priv->greeter_user = config_get_string (config_get_instance (), "LightDM", "greeter-user");
238 greeter_entry = getpwnam (manager->priv->greeter_user);
240 manager->priv->greeter_gid = greeter_entry->pw_gid;
244 shared_data_manager_finalize (GObject *object)
246 SharedDataManager *self = SHARED_DATA_MANAGER (object);
248 /* Should also cancel outstanding GIO operations, but whatever, let them do their thing. */
250 g_signal_handlers_disconnect_by_data (common_user_list_get_instance (), self);
252 if (self->priv->starting_dirs)
253 g_hash_table_destroy (self->priv->starting_dirs);
255 g_free (self->priv->greeter_user);
257 G_OBJECT_CLASS (shared_data_manager_parent_class)->finalize (object);
261 shared_data_manager_class_init (SharedDataManagerClass *klass)
263 GObjectClass *object_class = G_OBJECT_CLASS (klass);
265 object_class->finalize = shared_data_manager_finalize;
267 g_type_class_add_private (klass, sizeof (SharedDataManagerPrivate));