code.delx.au - pulseaudio/blob - src/modules/module-console-kit.c

   1 /***
   2     This file is part of PulseAudio.
   3
   4     Copyright 2008 Lennart Poettering
   5
   6     PulseAudio is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU Lesser General Public License as published
   8     by the Free Software Foundation; either version 2.1 of the License,
   9     or (at your option) any later version.
  10
  11     PulseAudio is distributed in the hope that it will be useful, but
  12     WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14     General Public License for more details.
  15
  16     You should have received a copy of the GNU Lesser General Public License
  17     along with PulseAudio; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19     USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <unistd.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <errno.h>
  31 #include <stdlib.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34
  35 #include <pulse/xmalloc.h>
  36 #include <pulse/timeval.h>
  37
  38 #include <pulsecore/core-error.h>
  39 #include <pulsecore/module.h>
  40 #include <pulsecore/log.h>
  41 #include <pulsecore/hashmap.h>
  42 #include <pulsecore/idxset.h>
  43 #include <pulsecore/core-util.h>
  44 #include <pulsecore/namereg.h>
  45 #include <pulsecore/core-scache.h>
  46 #include <pulsecore/modargs.h>
  47 #include <pulsecore/dbus-shared.h>
  48
  49 #include "module-console-kit-symdef.h"
  50
  51 PA_MODULE_AUTHOR("Lennart Poettering");
  52 PA_MODULE_DESCRIPTION("Create a client for each ConsoleKit session of this user");
  53 PA_MODULE_VERSION(PACKAGE_VERSION);
  54 PA_MODULE_LOAD_ONCE(TRUE);
  55
  56 static const char* const valid_modargs[] = {
  57     NULL
  58 };
  59
  60 struct session {
  61     char *id;
  62     pa_client *client;
  63 };
  64
  65 struct userdata {
  66     pa_module *module;
  67     pa_core *core;
  68     pa_dbus_connection *connection;
  69     pa_hashmap *sessions;
  70     pa_bool_t filter_added;
  71 };
  72
  73 static void add_session(struct userdata *u, const char *id) {
  74     DBusError error;
  75     DBusMessage *m = NULL, *reply = NULL;
  76     uint32_t uid;
  77     struct session *session;
  78     pa_client_new_data data;
  79
  80     dbus_error_init(&error);
  81
  82     if (pa_hashmap_get(u->sessions, id)) {
  83         pa_log_warn("Duplicate session %s, ignoring.", id);
  84         return;
  85     }
  86
  87     if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", id, "org.freedesktop.ConsoleKit.Session", "GetUnixUser"))) {
  88         pa_log("Failed to allocate GetUnixUser() method call.");
  89         goto fail;
  90     }
  91
  92     if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
  93         pa_log("GetUnixUser() call failed: %s: %s", error.name, error.message);
  94         goto fail;
  95     }
  96
  97     /* CK 0.3 this changed from int32 to uint32 */
  98     if (!dbus_message_get_args(reply, &error, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID)) {
  99         dbus_error_free(&error);
 100
 101         if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INT32, &uid, DBUS_TYPE_INVALID)) {
 102             pa_log("Failed to parse GetUnixUser() result: %s: %s", error.name, error.message);
 103             goto fail;
 104         }
 105     }
 106
 107     /* We only care about our own sessions */
 108     if ((uid_t) uid != getuid())
 109         goto fail;
 110
 111     session = pa_xnew(struct session, 1);
 112     session->id = pa_xstrdup(id);
 113
 114     pa_client_new_data_init(&data);
 115     data.module = u->module;
 116     data.driver = __FILE__;
 117     pa_proplist_setf(data.proplist, PA_PROP_APPLICATION_NAME, "ConsoleKit Session %s", id);
 118     pa_proplist_sets(data.proplist, "console-kit.session", id);
 119     session->client = pa_client_new(u->core, &data);
 120     pa_client_new_data_done(&data);
 121
 122     if (!session->client) {
 123         pa_xfree(session->id);
 124         pa_xfree(session);
 125         goto fail;
 126     }
 127
 128     pa_hashmap_put(u->sessions, session->id, session);
 129
 130     pa_log_debug("Added new session %s", id);
 131
 132 fail:
 133
 134     if (m)
 135         dbus_message_unref(m);
 136
 137     if (reply)
 138         dbus_message_unref(reply);
 139
 140     dbus_error_free(&error);
 141 }
 142
 143 static void free_session(struct session *session) {
 144     pa_assert(session);
 145
 146     pa_log_debug("Removing session %s", session->id);
 147
 148     pa_client_free(session->client);
 149     pa_xfree(session->id);
 150     pa_xfree(session);
 151 }
 152
 153 static void remove_session(struct userdata *u, const char *id) {
 154     struct session *session;
 155
 156     if (!(session = pa_hashmap_remove(u->sessions, id)))
 157         return;
 158
 159     free_session(session);
 160 }
 161
 162 static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *message, void *userdata) {
 163     struct userdata *u = userdata;
 164     DBusError error;
 165     const char *path;
 166
 167     pa_assert(bus);
 168     pa_assert(message);
 169     pa_assert(u);
 170
 171     dbus_error_init(&error);
 172
 173     pa_log_debug("dbus: interface=%s, path=%s, member=%s\n",
 174                  dbus_message_get_interface(message),
 175                  dbus_message_get_path(message),
 176                  dbus_message_get_member(message));
 177
 178     if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionAdded")) {
 179
 180         /* CK API changed to match spec in 0.3 */
 181         if (!dbus_message_get_args(message, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) {
 182             dbus_error_free(&error);
 183
 184             if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID)) {
 185                 pa_log_error("Failed to parse SessionAdded message: %s: %s", error.name, error.message);
 186                 goto finish;
 187             }
 188         }
 189
 190         add_session(u, path);
 191
 192     } else if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionRemoved")) {
 193
 194         /* CK API changed to match spec in 0.3 */
 195         if (!dbus_message_get_args(message, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) {
 196             dbus_error_free(&error);
 197
 198             if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID)) {
 199                 pa_log_error("Failed to parse SessionRemoved message: %s: %s", error.name, error.message);
 200                 goto finish;
 201             }
 202         }
 203
 204         remove_session(u, path);
 205     }
 206
 207 finish:
 208     dbus_error_free(&error);
 209
 210     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 211 }
 212
 213 static int get_session_list(struct userdata *u) {
 214     DBusError error;
 215     DBusMessage *m = NULL, *reply = NULL;
 216     uint32_t uid;
 217     DBusMessageIter iter, sub;
 218     int ret = -1;
 219
 220     pa_assert(u);
 221
 222     dbus_error_init(&error);
 223
 224     if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", "/org/freedesktop/ConsoleKit/Manager", "org.freedesktop.ConsoleKit.Manager", "GetSessionsForUnixUser"))) {
 225         pa_log("Failed to allocate GetSessionsForUnixUser() method call.");
 226         goto fail;
 227     }
 228
 229     uid = (uint32_t) getuid();
 230     if (!(dbus_message_append_args(m, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID))) {
 231         pa_log("Failed to append arguments to GetSessionsForUnixUser() method call.");
 232         goto fail;
 233     }
 234
 235     if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
 236         pa_log("GetSessionsForUnixUser() call failed: %s: %s", error.name, error.message);
 237         goto fail;
 238     }
 239
 240     dbus_message_iter_init(reply, &iter);
 241
 242     if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 243         dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_OBJECT_PATH) {
 244         pa_log("Failed to parse GetSessionsForUnixUser() result.");
 245         goto fail;
 246     }
 247
 248     dbus_message_iter_recurse(&iter, &sub);
 249
 250     for (;;) {
 251         int at;
 252         const char *id;
 253
 254         if ((at = dbus_message_iter_get_arg_type(&sub)) == DBUS_TYPE_INVALID)
 255             break;
 256
 257         assert(at == DBUS_TYPE_OBJECT_PATH);
 258         dbus_message_iter_get_basic(&sub, &id);
 259
 260         add_session(u, id);
 261
 262         dbus_message_iter_next(&sub);
 263     }
 264
 265     ret = 0;
 266
 267 fail:
 268
 269     if (m)
 270         dbus_message_unref(m);
 271
 272     if (reply)
 273         dbus_message_unref(reply);
 274
 275     dbus_error_free(&error);
 276
 277     return ret;
 278 }
 279
 280 int pa__init(pa_module*m) {
 281     DBusError error;
 282     pa_dbus_connection *connection;
 283     struct userdata *u = NULL;
 284     pa_modargs *ma;
 285
 286     pa_assert(m);
 287
 288     dbus_error_init(&error);
 289
 290     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 291         pa_log("Failed to parse module arguments");
 292         goto fail;
 293     }
 294
 295     if (!(connection = pa_dbus_bus_get(m->core, DBUS_BUS_SYSTEM, &error)) || dbus_error_is_set(&error)) {
 296
 297         if (connection)
 298             pa_dbus_connection_unref(connection);
 299
 300         pa_log_error("Unable to contact D-Bus system bus: %s: %s", error.name, error.message);
 301         goto fail;
 302     }
 303
 304     m->userdata = u = pa_xnew0(struct userdata, 1);
 305     u->core = m->core;
 306     u->module = m;
 307     u->connection = connection;
 308     u->sessions = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 309
 310     if (!dbus_connection_add_filter(pa_dbus_connection_get(connection), filter_cb, u, NULL)) {
 311         pa_log_error("Failed to add filter function");
 312         goto fail;
 313     }
 314
 315     u->filter_added = TRUE;
 316
 317     if (pa_dbus_add_matches(
 318                 pa_dbus_connection_get(connection), &error,
 319                 "type='signal',sender='org.freedesktop.ConsoleKit',interface='org.freedesktop.ConsoleKit.Seat',member='SessionAdded'",
 320                 "type='signal',sender='org.freedesktop.ConsoleKit',interface='org.freedesktop.ConsoleKit.Seat',member='SessionRemoved'", NULL) < 0) {
 321         pa_log_error("Unable to subscribe to ConsoleKit signals: %s: %s", error.name, error.message);
 322         goto fail;
 323     }
 324
 325     if (get_session_list(u) < 0)
 326         goto fail;
 327
 328     pa_modargs_free(ma);
 329
 330     return 0;
 331
 332 fail:
 333     if (ma)
 334         pa_modargs_free(ma);
 335
 336     dbus_error_free(&error);
 337     pa__done(m);
 338
 339     return -1;
 340 }
 341
 342
 343 void pa__done(pa_module *m) {
 344     struct userdata *u;
 345     struct session *session;
 346
 347     pa_assert(m);
 348
 349     if (!(u = m->userdata))
 350         return;
 351
 352     if (u->sessions) {
 353         while ((session = pa_hashmap_steal_first(u->sessions)))
 354             free_session(session);
 355
 356         pa_hashmap_free(u->sessions, NULL, NULL);
 357     }
 358
 359     if (u->connection) {
 360         pa_dbus_remove_matches(
 361                 pa_dbus_connection_get(u->connection),
 362                 "type='signal',sender='org.freedesktop.ConsoleKit',interface='org.freedesktop.ConsoleKit.Seat',member='SessionAdded'",
 363                 "type='signal',sender='org.freedesktop.ConsoleKit',interface='org.freedesktop.ConsoleKit.Seat',member='SessionRemoved'", NULL);
 364
 365         if (u->filter_added)
 366             dbus_connection_remove_filter(pa_dbus_connection_get(u->connection), filter_cb, u);
 367
 368         pa_dbus_connection_unref(u->connection);
 369     }
 370
 371     pa_xfree(u);
 372 }