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

   1 /* $Id$ */
   2
   3 /***
   4     This file is part of PulseAudio.
   5
   6     Copyright 2008 Lennart Poettering
   7
   8     PulseAudio is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU Lesser General Public License as published
  10     by the Free Software Foundation; either version 2 of the License,
  11     or (at your option) any later version.
  12
  13     PulseAudio is distributed in the hope that it will be useful, but
  14     WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16     General Public License for more details.
  17
  18     You should have received a copy of the GNU Lesser General Public License
  19     along with PulseAudio; if not, write to the Free Software
  20     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21     USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <errno.h>
  33 #include <stdlib.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36
  37 #include <pulse/xmalloc.h>
  38 #include <pulse/timeval.h>
  39
  40 #include <pulsecore/core-error.h>
  41 #include <pulsecore/module.h>
  42 #include <pulsecore/log.h>
  43 #include <pulsecore/hashmap.h>
  44 #include <pulsecore/idxset.h>
  45 #include <pulsecore/core-util.h>
  46 #include <pulsecore/namereg.h>
  47 #include <pulsecore/core-scache.h>
  48 #include <pulsecore/modargs.h>
  49
  50 #include <hal/libhal.h>
  51
  52 #include "dbus-util.h"
  53 #include "module-console-kit-symdef.h"
  54
  55 PA_MODULE_AUTHOR("Lennart Poettering");
  56 PA_MODULE_DESCRIPTION("Create a client for each ConsoleKit session of this user");
  57 PA_MODULE_VERSION(PACKAGE_VERSION);
  58 PA_MODULE_LOAD_ONCE(TRUE);
  59
  60 static const char* const valid_modargs[] = {
  61     NULL
  62 };
  63
  64 struct session {
  65     char *id;
  66     pa_client *client;
  67 };
  68
  69 struct userdata {
  70     pa_core *core;
  71     pa_dbus_connection *connection;
  72     pa_hashmap *sessions;
  73 };
  74
  75 static void add_session(struct userdata *u, const char *id) {
  76     DBusError error;
  77     DBusMessage *m = NULL, *reply = NULL;
  78     int32_t uid;
  79     struct session *session;
  80     char *t;
  81
  82     dbus_error_init (&error);
  83
  84     if (pa_hashmap_get(u->sessions, id)) {
  85         pa_log_warn("Duplicate session %s, ignoring.", id);
  86         return;
  87     }
  88
  89     if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", id, "org.freedesktop.ConsoleKit.Session", "GetUnixUser"))) {
  90         pa_log("Failed to allocate GetUnixUser() method call.");
  91         goto fail;
  92     }
  93
  94     if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
  95         pa_log("GetUnixUser() call failed: %s: %s", error.name, error.message);
  96         goto fail;
  97     }
  98
  99     /* FIXME: Why is this in int32? and not an uint32? */
 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     /* 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         if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID) || dbus_error_is_set(&error)) {
 171             pa_log_error("Failed to parse SessionAdded message: %s: %s", error.name, error.message);
 172             goto finish;
 173         }
 174
 175         add_session(u, path);
 176
 177     } else if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionRemoved")) {
 178
 179         if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID) || dbus_error_is_set(&error)) {
 180             pa_log_error("Failed to parse SessionRemoved message: %s: %s", error.name, error.message);
 181             goto finish;
 182         }
 183
 184         remove_session(u, path);
 185     }
 186
 187 finish:
 188     dbus_error_free(&error);
 189
 190     return DBUS_HANDLER_RESULT_HANDLED;
 191 }
 192
 193 static int get_session_list(struct userdata *u) {
 194     DBusError error;
 195     DBusMessage *m = NULL, *reply = NULL;
 196     uint32_t uid;
 197     DBusMessageIter iter, sub;
 198     int ret = -1;
 199
 200     pa_assert(u);
 201
 202     dbus_error_init(&error);
 203
 204     if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", "/org/freedesktop/ConsoleKit/Manager", "org.freedesktop.ConsoleKit.Manager", "GetSessionsForUnixUser"))) {
 205         pa_log("Failed to allocate GetSessionsForUnixUser() method call.");
 206         goto fail;
 207     }
 208
 209     uid = (uint32_t) getuid();
 210     if (!(dbus_message_append_args(m, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID))) {
 211         pa_log("Failed to append arguments to GetSessionsForUnixUser() method call.");
 212         goto fail;
 213     }
 214
 215     if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
 216         pa_log("GetSessionsForUnixUser() call failed: %s: %s", error.name, error.message);
 217         goto fail;
 218     }
 219
 220     dbus_message_iter_init(reply, &iter);
 221
 222     if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 223         dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_OBJECT_PATH) {
 224         pa_log("Failed to parse GetSessionsForUnixUser() result.");
 225         goto fail;
 226     }
 227
 228     dbus_message_iter_recurse(&iter, &sub);
 229
 230     for (;;) {
 231         int at;
 232         const char *id;
 233
 234         if ((at = dbus_message_iter_get_arg_type(&sub)) == DBUS_TYPE_INVALID)
 235             break;
 236
 237         assert(at == DBUS_TYPE_OBJECT_PATH);
 238         dbus_message_iter_get_basic(&sub, &id);
 239
 240         add_session(u, id);
 241
 242         dbus_message_iter_next(&sub);
 243     }
 244
 245     ret = 0;
 246
 247 fail:
 248
 249     if (m)
 250         dbus_message_unref(m);
 251
 252     if (reply)
 253         dbus_message_unref(reply);
 254
 255     dbus_error_free(&error);
 256
 257     return ret;
 258 }
 259
 260 int pa__init(pa_module*m) {
 261     DBusError error;
 262     pa_dbus_connection *connection;
 263     struct userdata *u = NULL;
 264     pa_modargs *ma;
 265
 266     pa_assert(m);
 267
 268     dbus_error_init(&error);
 269
 270     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 271         pa_log("Failed to parse module arguments");
 272         goto fail;
 273     }
 274
 275     if (!(connection = pa_dbus_bus_get(m->core, DBUS_BUS_SYSTEM, &error)) || dbus_error_is_set(&error)) {
 276
 277         if (connection)
 278             pa_dbus_connection_unref(connection);
 279
 280         pa_log_error("Unable to contact D-Bus system bus: %s: %s", error.name, error.message);
 281         goto fail;
 282     }
 283
 284     m->userdata = u = pa_xnew(struct userdata, 1);
 285     u->core = m->core;
 286     u->connection = connection;
 287     u->sessions = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 288
 289     if (!dbus_connection_add_filter(pa_dbus_connection_get(connection), filter_cb, u, NULL)) {
 290         pa_log_error("Failed to add filter function");
 291         goto fail;
 292     }
 293
 294     dbus_bus_add_match(pa_dbus_connection_get(connection), "type='signal',sender='org.freedesktop.ConsoleKit', interface='org.freedesktop.ConsoleKit.Seat'", &error);
 295     if (dbus_error_is_set(&error)) {
 296         pa_log_error("Unable to subscribe to ConsoleKit signals: %s: %s", error.name, error.message);
 297         goto fail;
 298     }
 299
 300     if (get_session_list(u) < 0)
 301         goto fail;
 302
 303     pa_modargs_free(ma);
 304
 305     return 0;
 306
 307 fail:
 308     if (ma)
 309         pa_modargs_free(ma);
 310
 311     dbus_error_free(&error);
 312     pa__done(m);
 313
 314     return -1;
 315 }
 316
 317
 318 void pa__done(pa_module *m) {
 319     struct userdata *u;
 320     struct session *session;
 321
 322     pa_assert(m);
 323
 324     if (!(u = m->userdata))
 325         return;
 326
 327     while ((session = pa_hashmap_steal_first(u->sessions)))
 328         free_session(session);
 329
 330     if (u->connection)
 331         pa_dbus_connection_unref(u->connection);
 332
 333     pa_xfree(u);
 334 }