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 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
  48 #include "dbus-util.h"
  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_core *core;
  67     pa_dbus_connection *connection;
  68     pa_hashmap *sessions;
  69 };
  70
  71 static void add_session(struct userdata *u, const char *id) {
  72     DBusError error;
  73     DBusMessage *m = NULL, *reply = NULL;
  74     uint32_t uid;
  75     struct session *session;
  76     char *t;
  77
  78     dbus_error_init (&error);
  79
  80     if (pa_hashmap_get(u->sessions, id)) {
  81         pa_log_warn("Duplicate session %s, ignoring.", id);
  82         return;
  83     }
  84
  85     if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", id, "org.freedesktop.ConsoleKit.Session", "GetUnixUser"))) {
  86         pa_log("Failed to allocate GetUnixUser() method call.");
  87         goto fail;
  88     }
  89
  90     if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
  91         pa_log("GetUnixUser() call failed: %s: %s", error.name, error.message);
  92         goto fail;
  93     }
  94
  95     /* CK 0.3 this changed from int32 to uint32 */
  96     if (!dbus_message_get_args(reply, &error, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID)) {
  97         dbus_error_free(&error);
  98
  99         if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INT32, &uid, DBUS_TYPE_INVALID)) {
 100             pa_log("Failed to parse GetUnixUser() result: %s: %s", error.name, error.message);
 101             goto fail;
 102         }
 103     }
 104
 105     /* We only care about our own sessions */
 106     if ((uid_t) uid != getuid())
 107         goto fail;
 108
 109     session = pa_xnew(struct session, 1);
 110     session->id = pa_xstrdup(id);
 111
 112     t = pa_sprintf_malloc("ConsoleKit Session %s", id);
 113     session->client = pa_client_new(u->core, __FILE__, t);
 114     pa_xfree(t);
 115
 116     pa_proplist_sets(session->client->proplist, "console-kit.session", id);
 117
 118     pa_hashmap_put(u->sessions, session->id, session);
 119
 120     pa_log_debug("Added new session %s", id);
 121
 122 fail:
 123
 124     if (m)
 125         dbus_message_unref(m);
 126
 127     if (reply)
 128         dbus_message_unref(reply);
 129
 130     dbus_error_free(&error);
 131 }
 132
 133 static void free_session(struct session *session) {
 134     pa_assert(session);
 135
 136     pa_log_debug("Removing session %s", session->id);
 137
 138     pa_client_free(session->client);
 139     pa_xfree(session->id);
 140     pa_xfree(session);
 141 }
 142
 143 static void remove_session(struct userdata *u, const char *id) {
 144     struct session *session;
 145
 146     if (!(session = pa_hashmap_remove(u->sessions, id)))
 147         return;
 148
 149     free_session(session);
 150 }
 151
 152 static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *message, void *userdata) {
 153     struct userdata *u = userdata;
 154     DBusError error;
 155     const char *path;
 156
 157     pa_assert(bus);
 158     pa_assert(message);
 159     pa_assert(u);
 160
 161     dbus_error_init(&error);
 162
 163     pa_log_debug("dbus: interface=%s, path=%s, member=%s\n",
 164                  dbus_message_get_interface(message),
 165                  dbus_message_get_path(message),
 166                  dbus_message_get_member(message));
 167
 168     if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionAdded")) {
 169
 170         /* CK API changed to match spec in 0.3 */
 171         if (!dbus_message_get_args(message, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) {
 172             dbus_error_free(&error);
 173
 174             if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID)) {
 175                 pa_log_error("Failed to parse SessionAdded message: %s: %s", error.name, error.message);
 176                 goto finish;
 177             }
 178         }
 179
 180         add_session(u, path);
 181         return DBUS_HANDLER_RESULT_HANDLED;
 182
 183     } else if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionRemoved")) {
 184
 185         /* CK API changed to match spec in 0.3 */
 186         if (!dbus_message_get_args(message, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) {
 187             dbus_error_free(&error);
 188
 189             if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID)) {
 190                 pa_log_error("Failed to parse SessionRemoved message: %s: %s", error.name, error.message);
 191                 goto finish;
 192             }
 193         }
 194
 195         remove_session(u, path);
 196         return DBUS_HANDLER_RESULT_HANDLED;
 197     }
 198
 199 finish:
 200     dbus_error_free(&error);
 201
 202     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 203 }
 204
 205 static int get_session_list(struct userdata *u) {
 206     DBusError error;
 207     DBusMessage *m = NULL, *reply = NULL;
 208     uint32_t uid;
 209     DBusMessageIter iter, sub;
 210     int ret = -1;
 211
 212     pa_assert(u);
 213
 214     dbus_error_init(&error);
 215
 216     if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", "/org/freedesktop/ConsoleKit/Manager", "org.freedesktop.ConsoleKit.Manager", "GetSessionsForUnixUser"))) {
 217         pa_log("Failed to allocate GetSessionsForUnixUser() method call.");
 218         goto fail;
 219     }
 220
 221     uid = (uint32_t) getuid();
 222     if (!(dbus_message_append_args(m, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID))) {
 223         pa_log("Failed to append arguments to GetSessionsForUnixUser() method call.");
 224         goto fail;
 225     }
 226
 227     if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
 228         pa_log("GetSessionsForUnixUser() call failed: %s: %s", error.name, error.message);
 229         goto fail;
 230     }
 231
 232     dbus_message_iter_init(reply, &iter);
 233
 234     if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 235         dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_OBJECT_PATH) {
 236         pa_log("Failed to parse GetSessionsForUnixUser() result.");
 237         goto fail;
 238     }
 239
 240     dbus_message_iter_recurse(&iter, &sub);
 241
 242     for (;;) {
 243         int at;
 244         const char *id;
 245
 246         if ((at = dbus_message_iter_get_arg_type(&sub)) == DBUS_TYPE_INVALID)
 247             break;
 248
 249         assert(at == DBUS_TYPE_OBJECT_PATH);
 250         dbus_message_iter_get_basic(&sub, &id);
 251
 252         add_session(u, id);
 253
 254         dbus_message_iter_next(&sub);
 255     }
 256
 257     ret = 0;
 258
 259 fail:
 260
 261     if (m)
 262         dbus_message_unref(m);
 263
 264     if (reply)
 265         dbus_message_unref(reply);
 266
 267     dbus_error_free(&error);
 268
 269     return ret;
 270 }
 271
 272 int pa__init(pa_module*m) {
 273     DBusError error;
 274     pa_dbus_connection *connection;
 275     struct userdata *u = NULL;
 276     pa_modargs *ma;
 277
 278     pa_assert(m);
 279
 280     dbus_error_init(&error);
 281
 282     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 283         pa_log("Failed to parse module arguments");
 284         goto fail;
 285     }
 286
 287     if (!(connection = pa_dbus_bus_get(m->core, DBUS_BUS_SYSTEM, &error)) || dbus_error_is_set(&error)) {
 288
 289         if (connection)
 290             pa_dbus_connection_unref(connection);
 291
 292         pa_log_error("Unable to contact D-Bus system bus: %s: %s", error.name, error.message);
 293         goto fail;
 294     }
 295
 296     m->userdata = u = pa_xnew(struct userdata, 1);
 297     u->core = m->core;
 298     u->connection = connection;
 299     u->sessions = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 300
 301     if (!dbus_connection_add_filter(pa_dbus_connection_get(connection), filter_cb, u, NULL)) {
 302         pa_log_error("Failed to add filter function");
 303         goto fail;
 304     }
 305
 306     dbus_bus_add_match(pa_dbus_connection_get(connection), "type='signal',sender='org.freedesktop.ConsoleKit', interface='org.freedesktop.ConsoleKit.Seat'", &error);
 307     if (dbus_error_is_set(&error)) {
 308         pa_log_error("Unable to subscribe to ConsoleKit signals: %s: %s", error.name, error.message);
 309         goto fail;
 310     }
 311
 312     if (get_session_list(u) < 0)
 313         goto fail;
 314
 315     pa_modargs_free(ma);
 316
 317     return 0;
 318
 319 fail:
 320     if (ma)
 321         pa_modargs_free(ma);
 322
 323     dbus_error_free(&error);
 324     pa__done(m);
 325
 326     return -1;
 327 }
 328
 329
 330 void pa__done(pa_module *m) {
 331     struct userdata *u;
 332     struct session *session;
 333
 334     pa_assert(m);
 335
 336     if (!(u = m->userdata))
 337         return;
 338
 339     if (u->sessions) {
 340         while ((session = pa_hashmap_steal_first(u->sessions)))
 341             free_session(session);
 342
 343         pa_hashmap_free(u->sessions, NULL, NULL);
 344     }
 345
 346     if (u->connection) {
 347         DBusError error;
 348         dbus_error_init(&error);
 349
 350         dbus_bus_remove_match(pa_dbus_connection_get(u->connection), "type='signal',sender='org.freedesktop.ConsoleKit', interface='org.freedesktop.ConsoleKit.Seat'", &error);
 351         dbus_error_free(&error);
 352
 353         dbus_connection_remove_filter(pa_dbus_connection_get(u->connection), filter_cb, u);
 354
 355         pa_dbus_connection_unref(u->connection);
 356     }
 357
 358     pa_xfree(u);
 359 }