/* -*- mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
- *
- * at-spi-bus-launcher: Manage the a11y bus as a child process
+ *
+ * at-spi-bus-launcher: Manage the a11y bus as a child process
*
* Copyright 2011 Red Hat, Inc.
*
#include <X11/Xatom.h>
#endif
+//TODO: move to vconf/vconf-internal-setting-keys.h?
+#define VCONFKEY_SETAPPL_ACCESSIBILITY_UNIVERSAL_SWITCH "db/setting/accessibility/universal-switch"
+
+#define APP_CONTROL_OPERATION_SCREEN_READ "http://tizen.org/appcontrol/operation/read_screen"
+#define APP_CONTROL_OPERATION_UNIVERSAL_SWITCH "http://tizen.org/appcontrol/operation/universal_switch"
+#include <appsvc.h>
+#include <vconf.h>
+
+//uncomment if you want debug
+//#ifndef TIZEN_ENGINEER_MODE
+//#define TIZEN_ENGINEER_MODE
+//#endif
+#ifdef LOG_TAG
+#undef LOG_TAG
+#endif
+
+#define LOG_TAG "ATSPI_BUS_LAUNCHER"
+
+#include <dlog.h>
+#include <aul.h>
+
+//uncomment this if you want log suring startup
+//seems like dlog is not working at startup time
+#define ATSPI_BUS_LAUNCHER_LOG_TO_FILE
+
+#ifdef ATSPI_BUS_LAUNCHER_LOG_TO_FILE
+FILE *log_file;
+#ifdef LOGD
+#undef LOGD
+#endif
+#define LOGD(arg...) do {if (log_file) {fprintf(log_file, ##arg);fprintf(log_file, "\n"); fflush(log_file);}} while(0)
+#endif
+
+static gboolean _launch_process_repeat_until_success(gpointer user_data);
+
typedef enum {
A11Y_BUS_STATE_IDLE = 0,
A11Y_BUS_STATE_READING_ADDRESS,
} A11yBusState;
typedef struct {
+ const char * name;
+ const char * app_control_operation;
+ const char * vconf_key;
+ int launch_repeats;
+ int pid;
+} A11yBusClient;
+
+typedef struct {
GMainLoop *loop;
gboolean launch_immediately;
gboolean a11y_enabled;
gboolean screen_reader_enabled;
+ GHashTable *client_watcher_id;
GDBusConnection *session_bus;
GSettings *a11y_schema;
GSettings *interface_schema;
+ A11yBusClient screen_reader;
+ A11yBusClient universal_switch;
+
A11yBusState state;
+
/* -1 == error, 0 == pending, > 0 == running */
int a11y_bus_pid;
char *a11y_bus_address;
#ifdef __linux
#include <sys/prctl.h>
prctl (PR_SET_PDEATHSIG, 15);
-#endif
+#endif
}
/**
gpointer data)
{
A11yBusLauncher *app = data;
-
+
app->a11y_bus_pid = -1;
app->state = A11Y_BUS_STATE_ERROR;
if (app->a11y_launch_error_message == NULL)
app->a11y_launch_error_message = g_strdup_printf ("Bus stopped by signal %d", WSTOPSIG (status));
}
g_main_loop_quit (app->loop);
-}
+}
static gboolean
ensure_a11y_bus (A11yBusLauncher *app)
if (app->a11y_bus_pid != 0)
return FALSE;
-
+
argv[1] = g_strdup_printf ("--config-file=%s/at-spi2/accessibility.conf", SYSCONFDIR);
if (pipe (app->pipefd) < 0)
g_error ("Failed to create pipe: %s", strerror (errno));
-
+
if (!g_spawn_async (NULL,
argv,
NULL,
app->state = A11Y_BUS_STATE_READING_ADDRESS;
app->a11y_bus_pid = pid;
- g_debug ("Launched a11y bus, child is %ld", (long) pid);
+ LOGD("Launched a11y bus, child is %ld", (long) pid);
if (!unix_read_all_fd_to_string (app->pipefd[0], addr_buf, sizeof (addr_buf)))
{
app->a11y_launch_error_message = g_strdup_printf ("Failed to read address: %s", strerror (errno));
/* Trim the trailing newline */
app->a11y_bus_address = g_strchomp (g_strdup (addr_buf));
- g_debug ("a11y bus address: %s", app->a11y_bus_address);
+ LOGD("a11y bus address: %s", app->a11y_bus_address);
#ifdef HAVE_X11
{
}
#endif
+ if (argv[1]) g_free(argv[1]);
+
return TRUE;
-
+
error:
+ if (argv[1]) g_free(argv[1]);
close (app->pipefd[0]);
close (app->pipefd[1]);
app->state = A11Y_BUS_STATE_ERROR;
&builder,
&invalidated_builder),
NULL);
+ g_variant_builder_clear (&builder);
+ g_variant_builder_clear (&invalidated_builder);
}
static void
if (enabled == app->screen_reader_enabled)
return;
- /* If the screen reader is being enabled, we should enable accessibility
- * if it isn't enabled already */
- if (enabled)
- handle_a11y_enabled_change (app, enabled, notify_gsettings);
-
app->screen_reader_enabled = enabled;
if (notify_gsettings && app->a11y_schema)
&builder,
&invalidated_builder),
NULL);
+ g_variant_builder_clear (&builder);
+ g_variant_builder_clear (&invalidated_builder);
+}
+
+static gboolean
+is_client_connected(A11yBusLauncher *app)
+{
+ guint watchers = g_hash_table_size(app->client_watcher_id);
+ LOGD("clients connected: %d", watchers);
+ return watchers > 0;
+}
+
+static void
+remove_client_watch(A11yBusLauncher *app,
+ const gchar *sender)
+{
+ LOGD("Remove client watcher for %s", sender);
+ guint watcher_id = GPOINTER_TO_UINT(g_hash_table_lookup(app->client_watcher_id, sender));
+ if (watcher_id)
+ g_bus_unwatch_name(watcher_id);
+
+ g_hash_table_remove(app->client_watcher_id, sender);
+ if (!is_client_connected(app))
+ handle_a11y_enabled_change (app, FALSE, TRUE);
+}
+
+static void
+on_client_name_vanished (GDBusConnection *connection,
+ const gchar *name,
+ gpointer user_data)
+{
+ A11yBusLauncher *app = user_data;
+ remove_client_watch(app, name);
+}
+
+static void
+add_client_watch(A11yBusLauncher *app,
+ const gchar *sender)
+{
+ LOGD("Add client watcher for %s", sender);
+
+ if (g_hash_table_contains(app->client_watcher_id, sender))
+ {
+ LOGI("Watcher for %s already registered", sender);
+ return;
+ }
+
+ guint watcher_id = g_bus_watch_name(G_BUS_TYPE_SESSION,
+ sender,
+ G_BUS_NAME_WATCHER_FLAGS_NONE,
+ NULL,
+ on_client_name_vanished,
+ app,
+ NULL);
+
+ g_hash_table_insert(app->client_watcher_id, g_strdup(sender), GUINT_TO_POINTER(watcher_id));
+ handle_a11y_enabled_change (app, TRUE, TRUE);
}
static gboolean
A11yBusLauncher *app = user_data;
const gchar *type = g_variant_get_type_string (value);
gboolean enabled;
-
+
if (g_strcmp0 (type, "b") != 0)
{
g_set_error (error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS,
if (g_strcmp0 (property_name, "IsEnabled") == 0)
{
- handle_a11y_enabled_change (app, enabled, TRUE);
+ if (enabled)
+ add_client_watch(app, sender);
+ else
+ remove_client_watch(app, sender);
return TRUE;
}
else if (g_strcmp0 (property_name, "ScreenReaderEnabled") == 0)
A11yBusLauncher *app = user_data;
GError *error;
guint registration_id;
-
+
if (connection == NULL)
{
g_main_loop_quit (app->loop);
gpointer data)
{
A11yBusLauncher *app = data;
-
+
g_main_loop_quit (app->loop);
return FALSE;
bridge_display = XOpenDisplay (NULL);
if (!bridge_display)
return FALSE;
-
+
AT_SPI_BUS = XInternAtom (bridge_display, "AT_SPI_BUS", False);
XGetWindowProperty (bridge_display,
XDefaultRootWindow (bridge_display),
if (data)
{
GDBusConnection *bus;
- const gchar *old_session = g_getenv ("DBUS_SESSION_BUS_ADDRESS");
- /* TODO: Is there a better way to connect? This is really hacky */
- g_setenv ("DBUS_SESSION_BUS_ADDRESS", (const gchar *)data, TRUE);
- bus = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, NULL);
- g_setenv ("DBUS_SESSION_BUS_ADDRESS", old_session, TRUE);
+ bus = g_dbus_connection_new_for_address_sync ((const gchar *)data, 0,
+ NULL, NULL, NULL);
if (bus != NULL)
{
result = TRUE;
gsettings_key_changed (GSettings *gsettings, const gchar *key, void *user_data)
{
gboolean new_val = g_settings_get_boolean (gsettings, key);
- A11yBusLauncher *app = user_data;
if (!strcmp (key, "toolkit-accessibility"))
handle_a11y_enabled_change (_global_app, new_val, FALSE);
handle_screen_reader_enabled_change (_global_app, new_val, FALSE);
}
+static int
+_process_dead_tracker (int pid, void *data)
+{
+ A11yBusLauncher *app = data;
+
+ if (app->screen_reader.pid > 0 && pid == app->screen_reader.pid)
+ {
+ LOGE("screen reader is dead, pid: %d, restarting", pid);
+ app->screen_reader.pid = 0;
+ g_timeout_add_seconds (2, _launch_process_repeat_until_success, &app->screen_reader);
+ }
+
+ if (app->universal_switch.pid > 0 && pid == app->universal_switch.pid)
+ {
+ LOGE("universal switch is dead, pid: %d, restarting", pid);
+ app->universal_switch.pid = 0;
+ g_timeout_add_seconds (2, _launch_process_repeat_until_success, &app->universal_switch);
+ }
+ return 0;
+}
+
+static void
+_register_process_dead_tracker ()
+{
+ if(_global_app->screen_reader.pid > 0 || _global_app->universal_switch.pid > 0) {
+ LOGD("registering process dead tracker");
+ aul_listen_app_dead_signal(_process_dead_tracker, _global_app);
+ } else {
+ LOGD("unregistering process dead tracker");
+ aul_listen_app_dead_signal(NULL, NULL);
+ }
+}
+
+
+static gboolean
+_launch_client(A11yBusClient *client, gboolean by_vconf_change)
+{
+ LOGD("Launching %s", client->name);
+
+ bundle *kb = NULL;
+ gboolean ret = FALSE;
+
+ kb = bundle_create();
+
+ if (kb == NULL)
+ {
+ LOGD("Can't create bundle");
+ return FALSE;
+ }
+
+ if (by_vconf_change)
+ {
+ if (bundle_add_str(kb, "by_vconf_change", "yes") != BUNDLE_ERROR_NONE)
+ {
+ LOGD("Can't add information to bundle");
+ }
+ }
+
+ int operation_error = appsvc_set_operation(kb, client->app_control_operation);
+ LOGD("appsvc_set_operation: %i", operation_error);
+
+ client->pid = appsvc_run_service(kb, 0, NULL, NULL);
+
+ if (client->pid > 0)
+ {
+ LOGD("Process launched with pid: %i", client->pid);
+ _register_process_dead_tracker();
+ ret = TRUE;
+ }
+ else
+ {
+ LOGD("Can't start %s - error code: %i", client->name, client->pid);
+ }
+
+ bundle_free(kb);
+ return ret;
+}
+
+static gboolean
+_launch_process_repeat_until_success(gpointer user_data) {
+ A11yBusClient *client = user_data;
+
+ if (client->launch_repeats > 100 || client->pid > 0)
+ {
+ //do not try anymore
+ return FALSE;
+ }
+
+ gboolean ret = _launch_client(client, FALSE);
+
+ if (ret)
+ {
+ //we managed to
+ client->launch_repeats = 0;
+ return FALSE;
+ }
+ client->launch_repeats++;
+ //try again
+ return TRUE;
+}
+
+static gboolean
+_terminate_process(int pid)
+{
+ int ret;
+ int ret_aul;
+ if (pid <= 0)
+ return FALSE;
+
+ int status = aul_app_get_status_bypid(pid);
+
+ if (status < 0)
+ {
+ LOGD("App with pid %d already terminated", pid);
+ return TRUE;
+ }
+
+ LOGD("terminate process with pid %d", pid);
+ ret_aul = aul_terminate_pid(pid);
+ if (ret_aul >= 0)
+ {
+ LOGD("Terminating with aul_terminate_pid: return is %d", ret_aul);
+ return TRUE;
+ }
+ else
+ LOGD("aul_terminate_pid failed: return is %d", ret_aul);
+
+ LOGD("Unable to terminate process using aul api. Sending SIGTERM signal");
+ ret = kill(pid, SIGTERM);
+ if (!ret)
+ {
+ return TRUE;
+ }
+
+ LOGD("Unable to terminate process: %d with api or signal.", pid);
+ return FALSE;
+}
+
+static gboolean
+_terminate_client(A11yBusClient *client)
+{
+ LOGD("Terminating %s", client->name);
+ int pid = client->pid;
+ client->pid = 0;
+ _register_process_dead_tracker();
+ gboolean ret = _terminate_process(pid);
+ return ret;
+}
+
+void vconf_client_cb(keynode_t *node, void *user_data)
+{
+ A11yBusClient *client = user_data;
+ int client_needed = vconf_keynode_get_bool(node);
+ LOGD("vconf_keynode_get_bool(node): %i", client_needed);
+ if (client_needed < 0)
+ return;
+
+ //check if process really exists (e.g didn't crash)
+ if (client->pid > 0)
+ {
+ int err = kill(client->pid,0);
+ //process doesn't exist
+ if (err == ESRCH)
+ client->pid = 0;
+ }
+
+ LOGD("client_needed: %i, client->pid: %i", client_needed, client->pid);
+ if (!client_needed && (client->pid > 0))
+ _terminate_client(client);
+ else if (client_needed && (client->pid <= 0))
+ _launch_client(client, TRUE);
+}
+
+
+static gboolean register_client(A11yBusClient *client)
+{
+ gboolean client_needed = FALSE;
+
+ if(!client->vconf_key) {
+ LOGE("Vconf_key missing for client: %s \n", client->vconf_key);
+ return FALSE;
+ }
+
+ int ret = vconf_get_bool(client->vconf_key, &client_needed);
+ if (ret != 0)
+ {
+ LOGD("Could not read %s key value.\n", client->vconf_key);
+ return FALSE;
+ }
+ ret = vconf_notify_key_changed(client->vconf_key, vconf_client_cb, client);
+ if(ret != 0)
+ {
+ LOGD("Could not add information level callback\n");
+ return FALSE;
+ }
+
+ if (client_needed)
+ g_timeout_add_seconds(2,_launch_process_repeat_until_success, client);
+ return TRUE;
+}
+
int
main (int argc,
char **argv)
{
- GError *error = NULL;
- GMainLoop *loop;
- GDBusConnection *session_bus;
- int name_owner_id;
+#ifdef ATSPI_BUS_LAUNCHER_LOG_TO_FILE
+ log_file = fopen("/tmp/at-spi-bus-launcher.log", "a");
+#endif
+
+ LOGD("Starting atspi bus launcher");
gboolean a11y_set = FALSE;
gboolean screen_reader_set = FALSE;
gint i;
if (already_running ())
- return 0;
+ {
+ LOGD("atspi bus launcher is already running");
+ return 0;
+ }
_global_app = g_slice_new0 (A11yBusLauncher);
_global_app->loop = g_main_loop_new (NULL, FALSE);
+ _global_app->client_watcher_id = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
+
+ _global_app->screen_reader.name = "screen-reader";
+ _global_app->screen_reader.app_control_operation = APP_CONTROL_OPERATION_SCREEN_READ;
+ _global_app->screen_reader.vconf_key = VCONFKEY_SETAPPL_ACCESSIBILITY_TTS;
+
+ _global_app->universal_switch.name = "universal-switch";
+ _global_app->universal_switch.app_control_operation = APP_CONTROL_OPERATION_UNIVERSAL_SWITCH;
+ _global_app->universal_switch.vconf_key = VCONFKEY_SETAPPL_ACCESSIBILITY_UNIVERSAL_SWITCH;
for (i = 1; i < argc; i++)
{
introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
g_assert (introspection_data != NULL);
- name_owner_id = g_bus_own_name (G_BUS_TYPE_SESSION,
+ g_bus_own_name (G_BUS_TYPE_SESSION,
"org.a11y.Bus",
G_BUS_NAME_OWNER_FLAGS_ALLOW_REPLACEMENT,
on_bus_acquired,
_global_app,
NULL);
+ if(!register_client(&_global_app->screen_reader))
+ return FALSE;
+ if(!register_client(&_global_app->universal_switch))
+ return FALSE;
+
g_main_loop_run (_global_app->loop);
if (_global_app->a11y_bus_pid > 0)
kill (_global_app->a11y_bus_pid, SIGTERM);
- /* Clear the X property if our bus is gone; in the case where e.g.
+ /* Clear the X property if our bus is gone; in the case where e.g.
* GDM is launching a login on an X server it was using before,
* we don't want early login processes to pick up the stale address.
*/
projects / platform / upstream / at-spi2-core.git / blobdiff