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
 182     } else if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionRemoved")) {
 183
 184         /* CK API changed to match spec in 0.3 */
 185         if (!dbus_message_get_args(message, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) {
 186             dbus_error_free(&error);
 187
 188             if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID)) {
 189                 pa_log_error("Failed to parse SessionRemoved message: %s: %s", error.name, error.message);
 190                 goto finish;
 191             }
 192         }
 193
 194         remove_session(u, path);
 195     }
 196
 197 finish:
 198     dbus_error_free(&error);
 199
 200     return DBUS_HANDLER_RESULT_HANDLED;
 201 }
 202
 203 static int get_session_list(struct userdata *u) {
 204     DBusError error;
 205     DBusMessage *m = NULL, *reply = NULL;
 206     uint32_t uid;
 207     DBusMessageIter iter, sub;
 208     int ret = -1;
 209
 210     pa_assert(u);
 211
 212     dbus_error_init(&error);
 213
 214     if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", "/org/freedesktop/ConsoleKit/Manager", "org.freedesktop.ConsoleKit.Manager", "GetSessionsForUnixUser"))) {
 215         pa_log("Failed to allocate GetSessionsForUnixUser() method call.");
 216         goto fail;
 217     }
 218
 219     uid = (uint32_t) getuid();
 220     if (!(dbus_message_append_args(m, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID))) {
 221         pa_log("Failed to append arguments to GetSessionsForUnixUser() method call.");
 222         goto fail;
 223     }
 224
 225     if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
 226         pa_log("GetSessionsForUnixUser() call failed: %s: %s", error.name, error.message);
 227         goto fail;
 228     }
 229
 230     dbus_message_iter_init(reply, &iter);
 231
 232     if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 233         dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_OBJECT_PATH) {
 234         pa_log("Failed to parse GetSessionsForUnixUser() result.");
 235         goto fail;
 236     }
 237
 238     dbus_message_iter_recurse(&iter, &sub);
 239
 240     for (;;) {
 241         int at;
 242         const char *id;
 243
 244         if ((at = dbus_message_iter_get_arg_type(&sub)) == DBUS_TYPE_INVALID)
 245             break;
 246
 247         assert(at == DBUS_TYPE_OBJECT_PATH);
 248         dbus_message_iter_get_basic(&sub, &id);
 249
 250         add_session(u, id);
 251
 252         dbus_message_iter_next(&sub);
 253     }
 254
 255     ret = 0;
 256
 257 fail:
 258
 259     if (m)
 260         dbus_message_unref(m);
 261
 262     if (reply)
 263         dbus_message_unref(reply);
 264
 265     dbus_error_free(&error);
 266
 267     return ret;
 268 }
 269
 270 int pa__init(pa_module*m) {
 271     DBusError error;
 272     pa_dbus_connection *connection;
 273     struct userdata *u = NULL;
 274     pa_modargs *ma;
 275
 276     pa_assert(m);
 277
 278     dbus_error_init(&error);
 279
 280     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 281         pa_log("Failed to parse module arguments");
 282         goto fail;
 283     }
 284
 285     if (!(connection = pa_dbus_bus_get(m->core, DBUS_BUS_SYSTEM, &error)) || dbus_error_is_set(&error)) {
 286
 287         if (connection)
 288             pa_dbus_connection_unref(connection);
 289
 290         pa_log_error("Unable to contact D-Bus system bus: %s: %s", error.name, error.message);
 291         goto fail;
 292     }
 293
 294     m->userdata = u = pa_xnew(struct userdata, 1);
 295     u->core = m->core;
 296     u->connection = connection;
 297     u->sessions = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 298
 299     if (!dbus_connection_add_filter(pa_dbus_connection_get(connection), filter_cb, u, NULL)) {
 300         pa_log_error("Failed to add filter function");
 301         goto fail;
 302     }
 303
 304     dbus_bus_add_match(pa_dbus_connection_get(connection), "type='signal',sender='org.freedesktop.ConsoleKit', interface='org.freedesktop.ConsoleKit.Seat'", &error);
 305     if (dbus_error_is_set(&error)) {
 306         pa_log_error("Unable to subscribe to ConsoleKit signals: %s: %s", error.name, error.message);
 307         goto fail;
 308     }
 309
 310     if (get_session_list(u) < 0)
 311         goto fail;
 312
 313     pa_modargs_free(ma);
 314
 315     return 0;
 316
 317 fail:
 318     if (ma)
 319         pa_modargs_free(ma);
 320
 321     dbus_error_free(&error);
 322     pa__done(m);
 323
 324     return -1;
 325 }
 326
 327
 328 void pa__done(pa_module *m) {
 329     struct userdata *u;
 330     struct session *session;
 331
 332     pa_assert(m);
 333
 334     if (!(u = m->userdata))
 335         return;
 336
 337     if (u->sessions) {
 338         while ((session = pa_hashmap_steal_first(u->sessions)))
 339             free_session(session);
 340
 341         pa_hashmap_free(u->sessions, NULL, NULL);
 342     }
 343
 344     if (u->connection) {
 345         DBusError error;
 346         dbus_error_init(&error);
 347
 348         dbus_bus_remove_match(pa_dbus_connection_get(u->connection), "type='signal',sender='org.freedesktop.ConsoleKit', interface='org.freedesktop.ConsoleKit.Seat'", &error);
 349         dbus_error_free(&error);
 350
 351         dbus_connection_remove_filter(pa_dbus_connection_get(u->connection), filter_cb, u);
 352
 353         pa_dbus_connection_unref(u->connection);
 354     }
 355
 356     pa_xfree(u);
 357 }