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 };
  71
  72 static void add_session(struct userdata *u, const char *id) {
  73     DBusError error;
  74     DBusMessage *m = NULL, *reply = NULL;
  75     uint32_t uid;
  76     struct session *session;
  77     pa_client_new_data data;
  78
  79     dbus_error_init (&error);
  80
  81     if (pa_hashmap_get(u->sessions, id)) {
  82         pa_log_warn("Duplicate session %s, ignoring.", id);
  83         return;
  84     }
  85
  86     if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", id, "org.freedesktop.ConsoleKit.Session", "GetUnixUser"))) {
  87         pa_log("Failed to allocate GetUnixUser() method call.");
  88         goto fail;
  89     }
  90
  91     if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
  92         pa_log("GetUnixUser() call failed: %s: %s", error.name, error.message);
  93         goto fail;
  94     }
  95
  96     /* CK 0.3 this changed from int32 to uint32 */
  97     if (!dbus_message_get_args(reply, &error, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID)) {
  98         dbus_error_free(&error);
  99
 100         if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INT32, &uid, DBUS_TYPE_INVALID)) {
 101             pa_log("Failed to parse GetUnixUser() result: %s: %s", error.name, error.message);
 102             goto fail;
 103         }
 104     }
 105
 106     /* We only care about our own sessions */
 107     if ((uid_t) uid != getuid())
 108         goto fail;
 109
 110     session = pa_xnew(struct session, 1);
 111     session->id = pa_xstrdup(id);
 112
 113     pa_client_new_data_init(&data);
 114     data.module = u->module;
 115     data.driver = __FILE__;
 116     pa_proplist_setf(data.proplist, PA_PROP_APPLICATION_NAME, "ConsoleKit Session %s", id);
 117     pa_proplist_sets(data.proplist, "console-kit.session", id);
 118     session->client = pa_client_new(u->core, &data);
 119     pa_client_new_data_done(&data);
 120
 121     if (!session->client) {
 122         pa_xfree(session->id);
 123         pa_xfree(session);
 124         goto fail;
 125     }
 126
 127     pa_hashmap_put(u->sessions, session->id, session);
 128
 129     pa_log_debug("Added new session %s", id);
 130
 131 fail:
 132
 133     if (m)
 134         dbus_message_unref(m);
 135
 136     if (reply)
 137         dbus_message_unref(reply);
 138
 139     dbus_error_free(&error);
 140 }
 141
 142 static void free_session(struct session *session) {
 143     pa_assert(session);
 144
 145     pa_log_debug("Removing session %s", session->id);
 146
 147     pa_client_free(session->client);
 148     pa_xfree(session->id);
 149     pa_xfree(session);
 150 }
 151
 152 static void remove_session(struct userdata *u, const char *id) {
 153     struct session *session;
 154
 155     if (!(session = pa_hashmap_remove(u->sessions, id)))
 156         return;
 157
 158     free_session(session);
 159 }
 160
 161 static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *message, void *userdata) {
 162     struct userdata *u = userdata;
 163     DBusError error;
 164     const char *path;
 165
 166     pa_assert(bus);
 167     pa_assert(message);
 168     pa_assert(u);
 169
 170     dbus_error_init(&error);
 171
 172     pa_log_debug("dbus: interface=%s, path=%s, member=%s\n",
 173                  dbus_message_get_interface(message),
 174                  dbus_message_get_path(message),
 175                  dbus_message_get_member(message));
 176
 177     if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionAdded")) {
 178
 179         /* CK API changed to match spec in 0.3 */
 180         if (!dbus_message_get_args(message, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) {
 181             dbus_error_free(&error);
 182
 183             if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID)) {
 184                 pa_log_error("Failed to parse SessionAdded message: %s: %s", error.name, error.message);
 185                 goto finish;
 186             }
 187         }
 188
 189         add_session(u, path);
 190
 191     } else if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionRemoved")) {
 192
 193         /* CK API changed to match spec in 0.3 */
 194         if (!dbus_message_get_args(message, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) {
 195             dbus_error_free(&error);
 196
 197             if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID)) {
 198                 pa_log_error("Failed to parse SessionRemoved message: %s: %s", error.name, error.message);
 199                 goto finish;
 200             }
 201         }
 202
 203         remove_session(u, path);
 204     }
 205
 206 finish:
 207     dbus_error_free(&error);
 208
 209     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 210 }
 211
 212 static int get_session_list(struct userdata *u) {
 213     DBusError error;
 214     DBusMessage *m = NULL, *reply = NULL;
 215     uint32_t uid;
 216     DBusMessageIter iter, sub;
 217     int ret = -1;
 218
 219     pa_assert(u);
 220
 221     dbus_error_init(&error);
 222
 223     if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", "/org/freedesktop/ConsoleKit/Manager", "org.freedesktop.ConsoleKit.Manager", "GetSessionsForUnixUser"))) {
 224         pa_log("Failed to allocate GetSessionsForUnixUser() method call.");
 225         goto fail;
 226     }
 227
 228     uid = (uint32_t) getuid();
 229     if (!(dbus_message_append_args(m, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID))) {
 230         pa_log("Failed to append arguments to GetSessionsForUnixUser() method call.");
 231         goto fail;
 232     }
 233
 234     if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
 235         pa_log("GetSessionsForUnixUser() call failed: %s: %s", error.name, error.message);
 236         goto fail;
 237     }
 238
 239     dbus_message_iter_init(reply, &iter);
 240
 241     if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 242         dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_OBJECT_PATH) {
 243         pa_log("Failed to parse GetSessionsForUnixUser() result.");
 244         goto fail;
 245     }
 246
 247     dbus_message_iter_recurse(&iter, &sub);
 248
 249     for (;;) {
 250         int at;
 251         const char *id;
 252
 253         if ((at = dbus_message_iter_get_arg_type(&sub)) == DBUS_TYPE_INVALID)
 254             break;
 255
 256         assert(at == DBUS_TYPE_OBJECT_PATH);
 257         dbus_message_iter_get_basic(&sub, &id);
 258
 259         add_session(u, id);
 260
 261         dbus_message_iter_next(&sub);
 262     }
 263
 264     ret = 0;
 265
 266 fail:
 267
 268     if (m)
 269         dbus_message_unref(m);
 270
 271     if (reply)
 272         dbus_message_unref(reply);
 273
 274     dbus_error_free(&error);
 275
 276     return ret;
 277 }
 278
 279 int pa__init(pa_module*m) {
 280     DBusError error;
 281     pa_dbus_connection *connection;
 282     struct userdata *u = NULL;
 283     pa_modargs *ma;
 284
 285     pa_assert(m);
 286
 287     dbus_error_init(&error);
 288
 289     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 290         pa_log("Failed to parse module arguments");
 291         goto fail;
 292     }
 293
 294     if (!(connection = pa_dbus_bus_get(m->core, DBUS_BUS_SYSTEM, &error)) || dbus_error_is_set(&error)) {
 295
 296         if (connection)
 297             pa_dbus_connection_unref(connection);
 298
 299         pa_log_error("Unable to contact D-Bus system bus: %s: %s", error.name, error.message);
 300         goto fail;
 301     }
 302
 303     m->userdata = u = pa_xnew(struct userdata, 1);
 304     u->core = m->core;
 305     u->module = m;
 306     u->connection = connection;
 307     u->sessions = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 308
 309     if (!dbus_connection_add_filter(pa_dbus_connection_get(connection), filter_cb, u, NULL)) {
 310         pa_log_error("Failed to add filter function");
 311         goto fail;
 312     }
 313
 314     if (pa_dbus_add_matches(
 315                 pa_dbus_connection_get(connection), &error,
 316                 "type='signal',sender='org.freedesktop.ConsoleKit',interface='org.freedesktop.ConsoleKit.Seat',member='SessionAdded'",
 317                 "type='signal',sender='org.freedesktop.ConsoleKit',interface='org.freedesktop.ConsoleKit.Seat',member='SessionRemoved'", NULL) < 0) {
 318         pa_log_error("Unable to subscribe to ConsoleKit signals: %s: %s", error.name, error.message);
 319         goto fail;
 320     }
 321
 322     if (get_session_list(u) < 0)
 323         goto fail;
 324
 325     pa_modargs_free(ma);
 326
 327     return 0;
 328
 329 fail:
 330     if (ma)
 331         pa_modargs_free(ma);
 332
 333     dbus_error_free(&error);
 334     pa__done(m);
 335
 336     return -1;
 337 }
 338
 339
 340 void pa__done(pa_module *m) {
 341     struct userdata *u;
 342     struct session *session;
 343
 344     pa_assert(m);
 345
 346     if (!(u = m->userdata))
 347         return;
 348
 349     if (u->sessions) {
 350         while ((session = pa_hashmap_steal_first(u->sessions)))
 351             free_session(session);
 352
 353         pa_hashmap_free(u->sessions, NULL, NULL);
 354     }
 355
 356     if (u->connection) {
 357         pa_dbus_remove_matches(
 358                 pa_dbus_connection_get(u->connection),
 359                 "type='signal',sender='org.freedesktop.ConsoleKit',interface='org.freedesktop.ConsoleKit.Seat',member='SessionAdded'",
 360                 "type='signal',sender='org.freedesktop.ConsoleKit',interface='org.freedesktop.ConsoleKit.Seat',member='SessionRemoved'", NULL);
 361
 362         dbus_connection_remove_filter(pa_dbus_connection_get(u->connection), filter_cb, u);
 363         pa_dbus_connection_unref(u->connection);
 364     }
 365
 366     pa_xfree(u);
 367 }