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 /* Listen, the rest of this file is nice async glib code and all, but
66 for this operation, we just need a fire and forget rm -rf. Since
67 recursively deleting in GIO is a huge pain in the butt, we'll just drop
70 gchar *path = g_build_filename (USERS_DIR, user, NULL);
71 gchar *quoted_path = g_shell_quote (path);
72 gchar *cmd = g_strdup_printf ("/bin/rm -rf %s", quoted_path);
74 if (!g_spawn_command_line_async (cmd, &error))
76 g_warning ("Could not delete unused user data directory %s: %s", path, error->message);
86 chown_user_dir_cb (GObject *object, GAsyncResult *res, gpointer user_data)
88 GFile *file = G_FILE (object);
89 GFileInfo *info = NULL;
92 if (!g_file_set_attributes_finish (file, res, &info, &error))
94 gchar *path = g_file_get_path (file);
95 g_warning ("Could not chown user data directory %s: %s",
96 path, error->message);
102 g_object_unref (info);
106 make_user_dir_cb (GObject *object, GAsyncResult *res, gpointer user_data)
108 GFile *file = G_FILE (object);
109 struct OwnerInfo *owner = (struct OwnerInfo *)user_data;
110 GError *error = NULL;
112 if (!g_file_make_directory_finish (file, res, &error))
114 if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_EXISTS))
116 gchar *path = g_file_get_path (file);
117 g_warning ("Could not create user data directory %s: %s",
118 path, error->message);
120 g_error_free (error);
121 g_object_unref (owner->manager);
125 g_error_free (error);
128 /* Even if the directory already exists, we want to re-affirm the owners
129 because the greeter gid is configuration based and may change between
131 GFileInfo *info = g_file_info_new ();
132 g_file_info_set_attribute_uint32 (info, G_FILE_ATTRIBUTE_UNIX_UID,
134 g_file_info_set_attribute_uint32 (info, G_FILE_ATTRIBUTE_UNIX_GID,
135 owner->manager->priv->greeter_gid);
136 g_file_info_set_attribute_uint32 (info, G_FILE_ATTRIBUTE_UNIX_MODE, 0770);
137 g_file_set_attributes_async (file, info, G_FILE_QUERY_INFO_NONE,
138 G_PRIORITY_DEFAULT, NULL,
139 chown_user_dir_cb, NULL);
141 g_object_unref (owner->manager);
146 setup_user_dir (SharedDataManager *manager, guint32 uid)
148 struct OwnerInfo *owner = g_malloc (sizeof (struct OwnerInfo));
149 owner->manager = g_object_ref (manager);
152 gchar *uidstr = g_strdup_printf ("%u", uid);
153 gchar *path = g_build_filename (USERS_DIR, uidstr, NULL);
154 GFile *file = g_file_new_for_path (path);
158 g_file_make_directory_async (file, G_PRIORITY_DEFAULT, NULL,
159 make_user_dir_cb, owner);
161 g_object_unref (file);
165 shared_data_manager_ensure_user_dir (SharedDataManager *manager, const gchar *user)
167 struct passwd *entry;
168 entry = getpwnam (user);
170 setup_user_dir (manager, entry->pw_uid);
174 next_user_dirs_cb (GObject *object, GAsyncResult *res, gpointer user_data)
176 GFileEnumerator *enumerator = G_FILE_ENUMERATOR (object);
177 SharedDataManager *manager = SHARED_DATA_MANAGER (user_data);
179 GError *error = NULL;
181 GList *files = g_file_enumerator_next_files_finish (enumerator, res,
185 g_warning ("Could not enumerate user data directory %s: %s",
186 USERS_DIR, error->message);
187 g_error_free (error);
188 g_object_unref (manager);
192 for (link = files; link; link = link->next)
194 GFileInfo *info = link->data;
195 g_hash_table_insert (manager->priv->starting_dirs,
196 g_strdup (g_file_info_get_name (info)), NULL);
201 g_list_free_full (files, g_object_unref);
202 g_file_enumerator_next_files_async (enumerator, NUM_ENUMERATION_FILES,
203 G_PRIORITY_DEFAULT, NULL,
204 next_user_dirs_cb, manager);
208 // We've finally assembled all the initial directories. Now let's
209 // iterate the current users and as we go, remove the users from the
210 // starting_dirs hash and thus see which users are obsolete.
211 GList *users = common_user_list_get_users (common_user_list_get_instance ());
212 for (link = users; link; link = link->next)
214 CommonUser *user = link->data;
215 gchar *uidstr = g_strdup_printf ("%u", common_user_get_uid (user));
216 g_hash_table_remove (manager->priv->starting_dirs, uidstr);
219 g_hash_table_foreach (manager->priv->starting_dirs,
220 delete_unused_user, manager);
221 g_hash_table_destroy (manager->priv->starting_dirs);
222 manager->priv->starting_dirs = NULL;
224 // Also set up our own greeter dir, so it has a place to dump its own files
225 // (imagine it holding some large files temporarily before shunting them
226 // to the next user to log in's specific directory).
227 setup_user_dir (manager, manager->priv->greeter_uid);
228 g_object_unref (manager);
233 list_user_dirs_cb (GObject *object, GAsyncResult *res, gpointer user_data)
235 GFile *file = G_FILE (object);
236 SharedDataManager *manager = SHARED_DATA_MANAGER (user_data);
237 GFileEnumerator *enumerator;
238 GError *error = NULL;
240 enumerator = g_file_enumerate_children_finish (file, res, &error);
241 if (enumerator == NULL)
243 g_warning ("Could not enumerate user data directory %s: %s",
244 USERS_DIR, error->message);
245 g_error_free (error);
246 g_object_unref (manager);
250 manager->priv->starting_dirs = g_hash_table_new_full (g_str_hash,
253 g_file_enumerator_next_files_async (enumerator, NUM_ENUMERATION_FILES,
254 G_PRIORITY_DEFAULT, NULL,
255 next_user_dirs_cb, manager);
259 user_removed_cb (CommonUserList *list, CommonUser *user,
260 SharedDataManager *manager)
262 gchar *uid = g_strdup_printf ("%u", common_user_get_uid (user));
263 delete_unused_user (uid, NULL, manager);
268 shared_data_manager_start (SharedDataManager *manager)
270 /* Grab list of all current directories, so we know if any exist that we
272 GFile *file = g_file_new_for_path (USERS_DIR);
273 g_file_enumerate_children_async (file, G_FILE_ATTRIBUTE_STANDARD_NAME,
274 G_FILE_QUERY_INFO_NONE,
275 G_PRIORITY_DEFAULT, NULL,
276 list_user_dirs_cb, g_object_ref (manager));
277 g_object_unref (file);
279 /* And listen for user removals. */
280 g_signal_connect (common_user_list_get_instance (), "user-removed",
281 G_CALLBACK (user_removed_cb), manager);
285 shared_data_manager_init (SharedDataManager *manager)
287 manager->priv = G_TYPE_INSTANCE_GET_PRIVATE (manager, SHARED_DATA_MANAGER_TYPE, SharedDataManagerPrivate);
289 // Grab current greeter-user gid
291 struct passwd *greeter_entry;
292 greeter_user = config_get_string (config_get_instance (), "LightDM", "greeter-user");
293 greeter_entry = getpwnam (greeter_user);
296 manager->priv->greeter_uid = greeter_entry->pw_uid;
297 manager->priv->greeter_gid = greeter_entry->pw_gid;
299 g_free (greeter_user);
303 shared_data_manager_dispose (GObject *object)
305 SharedDataManager *self = SHARED_DATA_MANAGER (object);
307 /* Should also cancel outstanding GIO operations, but whatever, let them
310 g_signal_handlers_disconnect_by_data (common_user_list_get_instance (),
313 G_OBJECT_CLASS (shared_data_manager_parent_class)->dispose (object);
317 shared_data_manager_finalize (GObject *object)
319 SharedDataManager *self = SHARED_DATA_MANAGER (object);
321 if (self->priv->starting_dirs)
322 g_hash_table_destroy (self->priv->starting_dirs);
324 G_OBJECT_CLASS (shared_data_manager_parent_class)->finalize (object);
328 shared_data_manager_class_init (SharedDataManagerClass *klass)
330 GObjectClass *object_class = G_OBJECT_CLASS (klass);
332 object_class->dispose = shared_data_manager_dispose;
333 object_class->finalize = shared_data_manager_finalize;
335 g_type_class_add_private (klass, sizeof (SharedDataManagerPrivate));