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 "dbus-util.h"
  51 #include "module-console-kit-symdef.h"
  52
  53 PA_MODULE_AUTHOR("Lennart Poettering");
  54 PA_MODULE_DESCRIPTION("Create a client for each ConsoleKit session of this user");
  55 PA_MODULE_VERSION(PACKAGE_VERSION);
  56 PA_MODULE_LOAD_ONCE(TRUE);
  57
  58 static const char* const valid_modargs[] = {
  59     NULL
  60 };
  61
  62 struct session {
  63     char *id;
  64     pa_client *client;
  65 };
  66
  67 struct userdata {
  68     pa_core *core;
  69     pa_dbus_connection *connection;
  70     pa_hashmap *sessions;
  71 };
  72
  73 static void add_session(struct userdata *u, const char *id) {
  74     DBusError error;
  75     DBusMessage *m = NULL, *reply = NULL;
  76     int32_t uid;
  77     struct session *session;
  78     char *t;
  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     /* FIXME: Why is this in int32? and not an uint32? */
  98     if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INT32, &uid, DBUS_TYPE_INVALID)) {
  99         pa_log("Failed to parse GetUnixUser() result: %s: %s", error.name, error.message);
 100         goto fail;
 101     }
 102
 103     /* We only care about our own sessions */
 104     if ((uid_t) uid != getuid())
 105         goto fail;
 106
 107     session = pa_xnew(struct session, 1);
 108     session->id = pa_xstrdup(id);
 109
 110     t = pa_sprintf_malloc("ConsoleKit Session %s", id);
 111     session->client = pa_client_new(u->core, __FILE__, t);
 112     pa_xfree(t);
 113
 114     pa_proplist_sets(session->client->proplist, "console-kit.session", id);
 115
 116     pa_hashmap_put(u->sessions, session->id, session);
 117
 118     pa_log_debug("Added new session %s", id);
 119
 120 fail:
 121
 122     if (m)
 123         dbus_message_unref(m);
 124
 125     if (reply)
 126         dbus_message_unref(reply);
 127
 128     dbus_error_free(&error);
 129 }
 130
 131 static void free_session(struct session *session) {
 132     pa_assert(session);
 133
 134     pa_log_debug("Removing session %s", session->id);
 135
 136     pa_client_free(session->client);
 137     pa_xfree(session->id);
 138     pa_xfree(session);
 139 }
 140
 141 static void remove_session(struct userdata *u, const char *id) {
 142     struct session *session;
 143
 144     if (!(session = pa_hashmap_remove(u->sessions, id)))
 145         return;
 146
 147     free_session(session);
 148 }
 149
 150 static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *message, void *userdata) {
 151     struct userdata *u = userdata;
 152     DBusError error;
 153     const char *path;
 154
 155     pa_assert(bus);
 156     pa_assert(message);
 157     pa_assert(u);
 158
 159     dbus_error_init(&error);
 160
 161     pa_log_debug("dbus: interface=%s, path=%s, member=%s\n",
 162                  dbus_message_get_interface(message),
 163                  dbus_message_get_path(message),
 164                  dbus_message_get_member(message));
 165
 166     if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionAdded")) {
 167
 168         if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID) || dbus_error_is_set(&error)) {
 169             pa_log_error("Failed to parse SessionAdded message: %s: %s", error.name, error.message);
 170             goto finish;
 171         }
 172
 173         add_session(u, path);
 174
 175     } else if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionRemoved")) {
 176
 177         if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID) || dbus_error_is_set(&error)) {
 178             pa_log_error("Failed to parse SessionRemoved message: %s: %s", error.name, error.message);
 179             goto finish;
 180         }
 181
 182         remove_session(u, path);
 183     }
 184
 185 finish:
 186     dbus_error_free(&error);
 187
 188     return DBUS_HANDLER_RESULT_HANDLED;
 189 }
 190
 191 static int get_session_list(struct userdata *u) {
 192     DBusError error;
 193     DBusMessage *m = NULL, *reply = NULL;
 194     uint32_t uid;
 195     DBusMessageIter iter, sub;
 196     int ret = -1;
 197
 198     pa_assert(u);
 199
 200     dbus_error_init(&error);
 201
 202     if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", "/org/freedesktop/ConsoleKit/Manager", "org.freedesktop.ConsoleKit.Manager", "GetSessionsForUnixUser"))) {
 203         pa_log("Failed to allocate GetSessionsForUnixUser() method call.");
 204         goto fail;
 205     }
 206
 207     uid = (uint32_t) getuid();
 208     if (!(dbus_message_append_args(m, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID))) {
 209         pa_log("Failed to append arguments to GetSessionsForUnixUser() method call.");
 210         goto fail;
 211     }
 212
 213     if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
 214         pa_log("GetSessionsForUnixUser() call failed: %s: %s", error.name, error.message);
 215         goto fail;
 216     }
 217
 218     dbus_message_iter_init(reply, &iter);
 219
 220     if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 221         dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_OBJECT_PATH) {
 222         pa_log("Failed to parse GetSessionsForUnixUser() result.");
 223         goto fail;
 224     }
 225
 226     dbus_message_iter_recurse(&iter, &sub);
 227
 228     for (;;) {
 229         int at;
 230         const char *id;
 231
 232         if ((at = dbus_message_iter_get_arg_type(&sub)) == DBUS_TYPE_INVALID)
 233             break;
 234
 235         assert(at == DBUS_TYPE_OBJECT_PATH);
 236         dbus_message_iter_get_basic(&sub, &id);
 237
 238         add_session(u, id);
 239
 240         dbus_message_iter_next(&sub);
 241     }
 242
 243     ret = 0;
 244
 245 fail:
 246
 247     if (m)
 248         dbus_message_unref(m);
 249
 250     if (reply)
 251         dbus_message_unref(reply);
 252
 253     dbus_error_free(&error);
 254
 255     return ret;
 256 }
 257
 258 int pa__init(pa_module*m) {
 259     DBusError error;
 260     pa_dbus_connection *connection;
 261     struct userdata *u = NULL;
 262     pa_modargs *ma;
 263
 264     pa_assert(m);
 265
 266     dbus_error_init(&error);
 267
 268     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 269         pa_log("Failed to parse module arguments");
 270         goto fail;
 271     }
 272
 273     if (!(connection = pa_dbus_bus_get(m->core, DBUS_BUS_SYSTEM, &error)) || dbus_error_is_set(&error)) {
 274
 275         if (connection)
 276             pa_dbus_connection_unref(connection);
 277
 278         pa_log_error("Unable to contact D-Bus system bus: %s: %s", error.name, error.message);
 279         goto fail;
 280     }
 281
 282     m->userdata = u = pa_xnew(struct userdata, 1);
 283     u->core = m->core;
 284     u->connection = connection;
 285     u->sessions = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 286
 287     if (!dbus_connection_add_filter(pa_dbus_connection_get(connection), filter_cb, u, NULL)) {
 288         pa_log_error("Failed to add filter function");
 289         goto fail;
 290     }
 291
 292     dbus_bus_add_match(pa_dbus_connection_get(connection), "type='signal',sender='org.freedesktop.ConsoleKit', interface='org.freedesktop.ConsoleKit.Seat'", &error);
 293     if (dbus_error_is_set(&error)) {
 294         pa_log_error("Unable to subscribe to ConsoleKit signals: %s: %s", error.name, error.message);
 295         goto fail;
 296     }
 297
 298     if (get_session_list(u) < 0)
 299         goto fail;
 300
 301     pa_modargs_free(ma);
 302
 303     return 0;
 304
 305 fail:
 306     if (ma)
 307         pa_modargs_free(ma);
 308
 309     dbus_error_free(&error);
 310     pa__done(m);
 311
 312     return -1;
 313 }
 314
 315
 316 void pa__done(pa_module *m) {
 317     struct userdata *u;
 318     struct session *session;
 319
 320     pa_assert(m);
 321
 322     if (!(u = m->userdata))
 323         return;
 324
 325     while ((session = pa_hashmap_steal_first(u->sessions)))
 326         free_session(session);
 327
 328     if (u->connection)
 329         pa_dbus_connection_unref(u->connection);
 330
 331     pa_xfree(u);
 332 }