add new module-console-kit which tracks ck sessions to avoid termination when there is still some session using the PA instance

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2508 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/Makefile.am

@@ -1138,6 +1138,12 @@ modlibexec_LTLIBRARIES += \
 		module-hal-detect.la
 endif
 
+if HAVE_DBUS
+modlibexec_LTLIBRARIES += \
+		libdbus-util.la \
+		module-console-kit.la
+endif
+
 if HAVE_BLUEZ
 modlibexec_LTLIBRARIES += \
 		module-bt-proximity.la
@@ -1199,7 +1205,8 @@ SYMDEF_FILES = \
 		modules/module-hal-detect-symdef.h \
 		modules/module-bt-proximity-symdef.h \
 		modules/gconf/module-gconf-symdef.h \
-		modules/module-position-event-sounds-symdef.h
+		modules/module-position-event-sounds-symdef.h \
+		modules/module-console-kit-symdef.h
 
 EXTRA_DIST += $(SYMDEF_FILES)
 BUILT_SOURCES += $(SYMDEF_FILES)
@@ -1487,7 +1494,7 @@ module_jack_source_la_LDFLAGS = -module -avoid-version
 module_jack_source_la_LIBADD = $(AM_LIBADD) libpulsecore.la $(JACK_LIBS)
 module_jack_source_la_CFLAGS = $(AM_CFLAGS) $(JACK_CFLAGS)
 
-# HAL
+# HAL/D-Bus
 libdbus_util_la_SOURCES = modules/dbus-util.c modules/dbus-util.h
 libdbus_util_la_LDFLAGS = -avoid-version
 libdbus_util_la_LIBADD = $(AM_LIBADD) $(DBUS_LIBS) libpulsecore.la
@@ -1498,6 +1505,11 @@ module_hal_detect_la_LDFLAGS = -module -avoid-version
 module_hal_detect_la_LIBADD = $(AM_LIBADD) $(HAL_LIBS) libpulsecore.la libdbus-util.la
 module_hal_detect_la_CFLAGS = $(AM_CFLAGS) $(HAL_CFLAGS)
 
+module_console_kit_la_SOURCES = modules/module-console-kit.c
+module_console_kit_la_LDFLAGS = -module -avoid-version
+module_console_kit_la_LIBADD = $(AM_LIBADD) $(HAL_LIBS) libpulsecore.la libdbus-util.la
+module_console_kit_la_CFLAGS = $(AM_CFLAGS) $(HAL_CFLAGS)
+
 # GConf support
 module_gconf_la_SOURCES = modules/gconf/module-gconf.c
 module_gconf_la_LDFLAGS = -module -avoid-version

src/modules/module-console-kit.c

@@ -0,0 +1,334 @@
+/* $Id$ */
+
+/***
+    This file is part of PulseAudio.
+
+    Copyright 2008 Lennart Poettering
+
+    PulseAudio is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published
+    by the Free Software Foundation; either version 2 of the License,
+    or (at your option) any later version.
+
+    PulseAudio is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+    General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with PulseAudio; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+    USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <pulse/xmalloc.h>
+#include <pulse/timeval.h>
+
+#include <pulsecore/core-error.h>
+#include <pulsecore/module.h>
+#include <pulsecore/log.h>
+#include <pulsecore/hashmap.h>
+#include <pulsecore/idxset.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/namereg.h>
+#include <pulsecore/core-scache.h>
+#include <pulsecore/modargs.h>
+
+#include <hal/libhal.h>
+
+#include "dbus-util.h"
+#include "module-console-kit-symdef.h"
+
+PA_MODULE_AUTHOR("Lennart Poettering");
+PA_MODULE_DESCRIPTION("Create a client for each ConsoleKit session of this user");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(TRUE);
+
+static const char* const valid_modargs[] = {
+    NULL
+};
+
+struct session {
+    char *id;
+    pa_client *client;
+};
+
+struct userdata {
+    pa_core *core;
+    pa_dbus_connection *connection;
+    pa_hashmap *sessions;
+};
+
+static void add_session(struct userdata *u, const char *id) {
+    DBusError error;
+    DBusMessage *m = NULL, *reply = NULL;
+    int32_t uid;
+    struct session *session;
+    char *t;
+
+    dbus_error_init (&error);
+
+    if (pa_hashmap_get(u->sessions, id)) {
+        pa_log_warn("Duplicate session %s, ignoring.", id);
+        return;
+    }
+
+    if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", id, "org.freedesktop.ConsoleKit.Session", "GetUnixUser"))) {
+        pa_log("Failed to allocate GetUnixUser() method call.");
+        goto fail;
+    }
+
+    if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
+        pa_log("GetUnixUser() call failed: %s: %s", error.name, error.message);
+        goto fail;
+    }
+
+    /* FIXME: Why is this in int32? and not an uint32? */
+    if (!dbus_message_get_args(reply, &error, DBUS_TYPE_INT32, &uid, DBUS_TYPE_INVALID)) {
+        pa_log("Failed to parse GetUnixUser() result: %s: %s", error.name, error.message);
+        goto fail;
+    }
+
+    /* We only care about our own sessions */
+    if ((uid_t) uid != getuid())
+        goto fail;
+
+    session = pa_xnew(struct session, 1);
+    session->id = pa_xstrdup(id);
+
+    t = pa_sprintf_malloc("ConsoleKit Session %s", id);
+    session->client = pa_client_new(u->core, __FILE__, t);
+    pa_xfree(t);
+
+    pa_proplist_sets(session->client->proplist, "console-kit.session", id);
+
+    pa_hashmap_put(u->sessions, session->id, session);
+
+    pa_log_debug("Added new session %s", id);
+
+fail:
+
+    if (m)
+        dbus_message_unref(m);
+
+    if (reply)
+        dbus_message_unref(reply);
+
+    dbus_error_free(&error);
+}
+
+static void free_session(struct session *session) {
+    pa_assert(session);
+
+    pa_log_debug("Removing session %s", session->id);
+
+    pa_client_free(session->client);
+    pa_xfree(session->id);
+    pa_xfree(session);
+}
+
+static void remove_session(struct userdata *u, const char *id) {
+    struct session *session;
+
+    if (!(session = pa_hashmap_remove(u->sessions, id)))
+        return;
+
+    free_session(session);
+}
+
+static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *message, void *userdata) {
+    struct userdata *u = userdata;
+    DBusError error;
+    const char *path;
+
+    pa_assert(bus);
+    pa_assert(message);
+    pa_assert(u);
+
+    dbus_error_init(&error);
+
+    pa_log_debug("dbus: interface=%s, path=%s, member=%s\n",
+                 dbus_message_get_interface(message),
+                 dbus_message_get_path(message),
+                 dbus_message_get_member(message));
+
+    if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionAdded")) {
+
+        if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID) || dbus_error_is_set(&error)) {
+            pa_log_error("Failed to parse SessionAdded message: %s: %s", error.name, error.message);
+            goto finish;
+        }
+
+        add_session(u, path);
+
+    } else if (dbus_message_is_signal(message, "org.freedesktop.ConsoleKit.Seat", "SessionRemoved")) {
+
+        if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &path, DBUS_TYPE_INVALID) || dbus_error_is_set(&error)) {
+            pa_log_error("Failed to parse SessionRemoved message: %s: %s", error.name, error.message);
+            goto finish;
+        }
+
+        remove_session(u, path);
+    }
+
+finish:
+    dbus_error_free(&error);
+
+    return DBUS_HANDLER_RESULT_HANDLED;
+}
+
+static int get_session_list(struct userdata *u) {
+    DBusError error;
+    DBusMessage *m = NULL, *reply = NULL;
+    uint32_t uid;
+    DBusMessageIter iter, sub;
+    int ret = -1;
+
+    pa_assert(u);
+
+    dbus_error_init(&error);
+
+    if (!(m = dbus_message_new_method_call("org.freedesktop.ConsoleKit", "/org/freedesktop/ConsoleKit/Manager", "org.freedesktop.ConsoleKit.Manager", "GetSessionsForUnixUser"))) {
+        pa_log("Failed to allocate GetSessionsForUnixUser() method call.");
+        goto fail;
+    }
+
+    uid = (uint32_t) getuid();
+    if (!(dbus_message_append_args(m, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID))) {
+        pa_log("Failed to append arguments to GetSessionsForUnixUser() method call.");
+        goto fail;
+    }
+
+    if (!(reply = dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(u->connection), m, -1, &error))) {
+        pa_log("GetSessionsForUnixUser() call failed: %s: %s", error.name, error.message);
+        goto fail;
+    }
+
+    dbus_message_iter_init(reply, &iter);
+
+    if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
+        dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_OBJECT_PATH) {
+        pa_log("Failed to parse GetSessionsForUnixUser() result.");
+        goto fail;
+    }
+
+    dbus_message_iter_recurse(&iter, &sub);
+
+    for (;;) {
+        int at;
+        const char *id;
+
+        if ((at = dbus_message_iter_get_arg_type(&sub)) == DBUS_TYPE_INVALID)
+            break;
+
+        assert(at == DBUS_TYPE_OBJECT_PATH);
+        dbus_message_iter_get_basic(&sub, &id);
+
+        add_session(u, id);
+
+        dbus_message_iter_next(&sub);
+    }
+
+    ret = 0;
+
+fail:
+
+    if (m)
+        dbus_message_unref(m);
+
+    if (reply)
+        dbus_message_unref(reply);
+
+    dbus_error_free(&error);
+
+    return ret;
+}
+
+int pa__init(pa_module*m) {
+    DBusError error;
+    pa_dbus_connection *connection;
+    struct userdata *u = NULL;
+    pa_modargs *ma;
+
+    pa_assert(m);
+
+    dbus_error_init(&error);
+
+    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+        pa_log("Failed to parse module arguments");
+        goto fail;
+    }
+
+    if (!(connection = pa_dbus_bus_get(m->core, DBUS_BUS_SYSTEM, &error)) || dbus_error_is_set(&error)) {
+
+        if (connection)
+            pa_dbus_connection_unref(connection);
+
+        pa_log_error("Unable to contact D-Bus system bus: %s: %s", error.name, error.message);
+        goto fail;
+    }
+
+    m->userdata = u = pa_xnew(struct userdata, 1);
+    u->core = m->core;
+    u->connection = connection;
+    u->sessions = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
+
+    if (!dbus_connection_add_filter(pa_dbus_connection_get(connection), filter_cb, u, NULL)) {
+        pa_log_error("Failed to add filter function");
+        goto fail;
+    }
+
+    dbus_bus_add_match(pa_dbus_connection_get(connection), "type='signal',sender='org.freedesktop.ConsoleKit', interface='org.freedesktop.ConsoleKit.Seat'", &error);
+    if (dbus_error_is_set(&error)) {
+        pa_log_error("Unable to subscribe to ConsoleKit signals: %s: %s", error.name, error.message);
+        goto fail;
+    }
+
+    if (get_session_list(u) < 0)
+        goto fail;
+
+    pa_modargs_free(ma);
+
+    return 0;
+
+fail:
+    if (ma)
+        pa_modargs_free(ma);
+
+    dbus_error_free(&error);
+    pa__done(m);
+
+    return -1;
+}
+
+
+void pa__done(pa_module *m) {
+    struct userdata *u;
+    struct session *session;
+
+    pa_assert(m);
+
+    if (!(u = m->userdata))
+        return;
+
+    while ((session = pa_hashmap_steal_first(u->sessions)))
+        free_session(session);
+
+    if (u->connection)
+        pa_dbus_connection_unref(u->connection);
+
+    pa_xfree(u);
+}