+
+#ifdef FREMANTLE
+/* Get a browserd PID from the corresponding Mozilla profile lockfile */
+static pid_t get_browserd_pid(const char *lockfile) {
+ char buf[256], *tmp;
+
+ /* The lockfile is a symlink pointing to "[ipaddr]:+[pid]", so read in
+ the target of the symlink and parse it that way */
+ memset(buf, '\0', 256);
+ if (readlink(lockfile, buf, 255) == -1)
+ return -errno;
+ if (!(tmp = strstr(buf, ":+")))
+ return 0;
+ tmp += 2; /* Skip over the ":+" */
+
+ return atoi(tmp);
+}
+
+/* Check to see whether MicroB is ready to handle D-Bus requests yet
+ See the comments in microb_start_dbus_watch_* to understand how this
+ works. */
+static DBusHandlerResult check_microb_started(DBusConnection *connection,
+ DBusMessage *message,
+ void *user_data) {
+ DBusError error;
+ char *name, *old, *new;
+
+ log_msg("Checking to see if MicroB is ready\n");
+ dbus_error_init(&error);
+ if (!dbus_message_get_args(message, &error,
+ DBUS_TYPE_STRING, &name,
+ DBUS_TYPE_STRING, &old,
+ DBUS_TYPE_STRING, &new,
+ DBUS_TYPE_INVALID)) {
+ log_msg("%s\n", error.message);
+ dbus_error_free(&error);
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+ }
+ /* If new is not an empty string, then the name has been acquired, and
+ MicroB should be ready to handle our request */
+ if (strlen(new) > 0) {
+ log_msg("MicroB ready\n");
+ microb_started = 1;
+ }
+
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+}
+
+/* Set up the D-Bus eavesdropping we'll use to watch for MicroB acquiring the
+ com.nokia.osso_browser D-Bus name.
+
+ Ideas for how to do this monitoring derived from the dbus-monitor code
+ (tools/dbus-monitor.c in the D-Bus codebase). */
+DBusConnection *microb_start_dbus_watch_init(void) {
+ DBusConnection *conn;
+ DBusError dbus_error;
+ DBusHandleMessageFunction filter_func = check_microb_started;
+
+ dbus_error_init(&dbus_error);
+
+ conn = dbus_bus_get_private(DBUS_BUS_SESSION, &dbus_error);
+ if (!conn) {
+ log_msg("Failed to open connection to session bus: %s\n",
+ dbus_error.message);
+ dbus_error_free(&dbus_error);
+ return NULL;
+ }
+
+ dbus_bus_add_match(conn,
+ "type='signal',interface='org.freedesktop.DBus',member='NameOwnerChanged',arg0='com.nokia.osso_browser'",
+ &dbus_error);
+ if (dbus_error_is_set(&dbus_error)) {
+ log_msg("Failed to set up watch for browser UI start: %s\n",
+ dbus_error.message);
+ dbus_error_free(&dbus_error);
+ return NULL;
+ }
+ if (!dbus_connection_add_filter(conn, filter_func, NULL, NULL)) {
+ log_msg("Failed to set up watch filter!\n");
+ return NULL;
+ }
+
+ return conn;
+}
+
+/* Wait for MicroB to acquire the com.nokia.osso_browser D-Bus name
+ Blocks until name is acquired, then returns */
+void microb_start_dbus_watch_wait(DBusConnection *conn) {
+ microb_started = 0;
+ log_msg("Waiting for MicroB to start\n");
+ while (!microb_started &&
+ dbus_connection_read_write_dispatch(conn, -1));
+}
+
+/* Tear down the D-Bus watch for acquiring com.nokia.osso-browser */
+void microb_start_dbus_watch_remove(DBusConnection *conn) {
+ DBusError dbus_error;
+ DBusHandleMessageFunction filter_func = check_microb_started;
+
+ dbus_connection_remove_filter(conn, filter_func, NULL);
+ dbus_bus_remove_match(conn,
+ "type='signal',interface='org.freedesktop.DBus',member='NameOwnerChanged',arg0='com.nokia.osso_browser'",
+ &dbus_error);
+ if (dbus_error_is_set(&dbus_error))
+ /* Don't really care -- about to disconnect from the
+ bus anyhow */
+ dbus_error_free(&dbus_error);
+ dbus_connection_close(conn);
+ dbus_connection_unref(conn);
+}
+
+/* Start a new MicroB browser process if one isn't already running */
+pid_t launch_microb_start_browser_process(DBusConnection *conn, int fd) {
+ pid_t pid;
+ int status;
+
+ status = system("pidof browser > /dev/null");
+ if (WIFEXITED(status) && !WEXITSTATUS(status)) {
+ /* MicroB browser already running */
+ return 0;
+ }
+
+ if ((pid = fork()) == -1) {
+ log_perror(errno, "fork");
+ return -1;
+ }
+
+ if (!pid) {
+ /* Child process */
+ dbus_connection_close(conn);
+ dbus_connection_unref(conn);
+ if (fd != -1)
+ close(fd);
+ close_stdio();
+
+ /* exec maemo-invoker directly instead of relying on the
+ /usr/bin/browser symlink, since /usr/bin/browser may have
+ been replaced with a shell script calling us via D-Bus */
+ /* Launch the browser in the background -- our parent will
+ wait for it to claim the D-Bus name and then display the
+ window using D-Bus */
+ execl("/usr/bin/maemo-invoker", "browser", (char *)NULL);
+
+ /* If we get here, exec() failed */
+ exit(1);
+ }
+
+ return pid;
+}
+
+/* Open a MicroB window using the D-Bus interface
+ It's assumed that we have already released the D-Bus name and that it's been
+ ensured that MicroB has acquired com.nokia.osso_browser (otherwise this will
+ cause D-Bus to try forever to launch another browser-switchboard) */
+
+#define LAUNCH_MICROB_BOOKMARK_WIN_OK 0x1
+
+int launch_microb_open_window(struct swb_context *ctx, char *uri,
+ int flags) {
+ DBusGProxy *g_proxy;
+ GError *gerror = NULL;
+
+ g_proxy = dbus_g_proxy_new_for_name(ctx->session_bus,
+ "com.nokia.osso_browser",
+ "/com/nokia/osso_browser/request",
+ "com.nokia.osso_browser");
+ if (!g_proxy) {
+ log_msg("Couldn't get a com.nokia.osso_browser proxy\n");
+ return 0;
+ }
+
+ if (!strcmp(uri, "new_window")) {
+ if (flags & LAUNCH_MICROB_BOOKMARK_WIN_OK) {
+ if (!dbus_g_proxy_call(g_proxy, "top_application",
+ &gerror, G_TYPE_INVALID,
+ G_TYPE_INVALID)) {
+ log_msg("Opening window failed: %s\n",
+ gerror->message);
+ g_error_free(gerror);
+ return 0;
+ }
+
+ return 1;
+ } else {
+ /* Since we can't detect when the bookmark window
+ closes, we'd have a corner case where, if the user
+ just closes the bookmark window without opening any
+ browser windows, we don't kill off MicroB or resume
+ handling com.nokia.osso_browser */
+ uri = "about:blank";
+ }
+ }
+ if (!dbus_g_proxy_call(g_proxy, "load_url",
+ &gerror,
+ G_TYPE_STRING, uri,
+ G_TYPE_INVALID,
+ G_TYPE_INVALID)) {
+ log_msg("Opening window failed: %s\n", gerror->message);
+ g_error_free(gerror);
+ return 0;
+ }
+
+ g_object_unref(g_proxy);
+ return 1;
+}
+
+/* Launch Fremantle MicroB and kill it when the session is finished */
+void launch_microb_fremantle_with_kill(struct swb_context *ctx, char *uri) {
+ int status;
+ pid_t pid;
+ char *homedir, *microb_profile_dir, *microb_lockfile;
+ size_t len;
+ int fd, inot_wd;
+ DBusConnection *raw_connection;
+ int bytes_read;
+ char buf[256], *pos;
+ struct inotify_event *event;
+ pid_t browserd_pid, waited_pid;
+ struct sigaction act, oldact;
+ int ignore_sigstop;
+
+ /* Put together the path to the MicroB browserd lockfile */
+ if (!(homedir = getenv("HOME")))
+ homedir = DEFAULT_HOMEDIR;
+ len = strlen(homedir) + strlen(MICROB_PROFILE_DIR) + 1;
+ if (!(microb_profile_dir = calloc(len, sizeof(char)))) {
+ log_msg("calloc() failed\n");
+ exit(1);
+ }
+ snprintf(microb_profile_dir, len, "%s%s",
+ homedir, MICROB_PROFILE_DIR);
+ len = strlen(homedir) + strlen(MICROB_PROFILE_DIR) +
+ strlen("/") + strlen(MICROB_LOCKFILE) + 1;
+ if (!(microb_lockfile = calloc(len, sizeof(char)))) {
+ log_msg("calloc() failed\n");
+ exit(1);
+ }
+ snprintf(microb_lockfile, len, "%s%s/%s",
+ homedir, MICROB_PROFILE_DIR, MICROB_LOCKFILE);
+
+ /* Watch for the creation of a MicroB browserd lockfile
+ NB: The watch has to be set up here, before the browser
+ is launched, to make sure there's no race between browserd
+ starting and us creating the watch */
+ if ((fd = inotify_init()) == -1) {
+ log_perror(errno, "inotify_init");
+ exit(1);
+ }
+ if ((inot_wd = inotify_add_watch(fd, microb_profile_dir,
+ IN_CREATE)) == -1) {
+ log_perror(errno, "inotify_add_watch");
+ exit(1);
+ }
+ free(microb_profile_dir);
+
+ /* Set up the D-Bus eavesdropping we'll use to watch for MicroB
+ acquiring the com.nokia.osso_browser D-Bus name. Again, this needs
+ to happen before the browser is launched, so that there's no race
+ between establishing the watch and browser startup. */
+ if (!(raw_connection = microb_start_dbus_watch_init())) {
+ exit(1);
+ }
+
+ /* Launch a MicroB browser process if it's not already running */
+ if ((pid = launch_microb_start_browser_process(raw_connection, fd)) < 0)
+ exit(1);
+
+ /* Release the osso_browser D-Bus name so that MicroB can take it */
+ dbus_release_osso_browser_name(ctx);
+
+ /* Wait for our child to start the browser UI process and
+ for it to acquire the com.nokia.osso_browser D-Bus name,
+ then make the appropriate method call to open the browser
+ window. */
+ microb_start_dbus_watch_wait(raw_connection);
+ microb_start_dbus_watch_remove(raw_connection);
+ if (!launch_microb_open_window(ctx, uri, 0)) {
+ exit(1);
+ }
+
+ /* Workaround: the browser process we started is going to want
+ to hang around forever, hogging the com.nokia.osso_browser
+ D-Bus interface while at it. To fix this, we notice that
+ when the last browser window closes, the browser UI restarts
+ its attached browserd process. Get the browserd process's
+ PID and use ptrace() to watch for process termination.
+
+ This has the problem of not being able to detect whether
+ the bookmark window is open and/or in use, but it's the best
+ that I can think of. Better suggestions would be greatly
+ appreciated. */
+
+ if (!pid)
+ /* If we didn't start the MicroB browser process ourselves, try
+ to get the PID of the browserd from the lockfile */
+ browserd_pid = get_browserd_pid(microb_lockfile);
+ else
+ browserd_pid = 0;
+
+ /* If getting the lockfile PID failed, or the lockfile PID doesn't
+ exist, assume that we have a stale lockfile and wait for the new
+ browserd lockfile to be created */
+ if (browserd_pid <= 0 || kill(browserd_pid, 0) == ESRCH) {
+ log_msg("Waiting for browserd lockfile to be created\n");
+ memset(buf, '\0', 256);
+ /* read() blocks until there are events to be read */
+ while ((bytes_read = read(fd, buf, 255)) > 0) {
+ pos = buf;
+ /* Loop until we see the event we're looking for
+ or until all the events are processed */
+ while (pos && (pos-buf) < bytes_read) {
+ event = (struct inotify_event *)pos;
+ len = sizeof(struct inotify_event) + event->len;
+ if (!strcmp(MICROB_LOCKFILE, event->name)) {
+ /* Lockfile created */
+ pos = NULL;
+ break;
+ } else if ((pos-buf) + len < bytes_read)
+ /* More events to process */
+ pos += len;
+ else
+ /* All events processed */
+ break;
+ }
+ if (!pos)
+ /* Event found, stop looking */
+ break;
+ memset(buf, '\0', 256);
+ }
+
+ if ((browserd_pid = get_browserd_pid(microb_lockfile)) <= 0) {
+ if (browserd_pid == 0)
+ log_msg("Profile lockfile link lacks PID\n");
+ else
+ log_perror(-browserd_pid,
+ "readlink() on lockfile failed");
+ exit(1);
+ }
+ }
+ inotify_rm_watch(fd, inot_wd);
+ close(fd);
+ free(microb_lockfile);
+
+ /* Wait for the browserd to close */
+ log_msg("Waiting for MicroB (browserd pid %d) to finish\n",
+ browserd_pid);
+ /* Clear any existing SIGCHLD handler to prevent interference
+ with our wait() */
+ act.sa_handler = SIG_DFL;
+ act.sa_flags = 0;
+ sigemptyset(&(act.sa_mask));
+ if (sigaction(SIGCHLD, &act, &oldact) == -1) {
+ log_perror(errno, "clearing SIGCHLD handler failed");
+ exit(1);
+ }
+
+ /* Trace the browserd to get a close notification */
+ ignore_sigstop = 1;
+ if (ptrace(PTRACE_ATTACH, browserd_pid, NULL, NULL) == -1) {
+ log_perror(errno, "PTRACE_ATTACH");
+ exit(1);
+ }
+ ptrace(PTRACE_CONT, browserd_pid, NULL, NULL);
+ while ((waited_pid = wait(&status)) > 0) {
+ if (waited_pid != browserd_pid)
+ /* Not interested in other processes */
+ continue;
+ if (WIFEXITED(status) || WIFSIGNALED(status))
+ /* browserd exited */
+ break;
+ else if (WIFSTOPPED(status)) {
+ /* browserd was sent a signal
+ We're responsible for making sure this signal gets
+ delivered */
+ if (ignore_sigstop && WSTOPSIG(status) == SIGSTOP) {
+ /* Ignore the first SIGSTOP received
+ This is raised for some reason immediately
+ after we start tracing the process, and
+ won't be followed by a SIGCONT at any point
+ */
+ log_msg("Ignoring first SIGSTOP\n");
+ ptrace(PTRACE_CONT, browserd_pid, NULL, NULL);
+ ignore_sigstop = 0;
+ continue;
+ }
+ log_msg("Forwarding signal %d to browserd\n",
+ WSTOPSIG(status));
+ ptrace(PTRACE_CONT, browserd_pid, NULL,
+ WSTOPSIG(status));
+ }
+ }
+
+ /* Kill off browser UI
+ XXX: There is a race here with the restarting of the closed
+ browserd; if that happens before we kill the browser UI, the newly
+ started browserd may not close with the UI
+ XXX: Hope we don't cause data loss here! */
+ log_msg("Killing MicroB\n");
+ if (pid > 0) {
+ kill(pid, SIGTERM);
+ waitpid(pid, &status, 0);
+ } else {
+ system("kill `pidof browser` > /dev/null 2>&1");
+ }
+
+ /* Restore old SIGCHLD handler */
+ if (sigaction(SIGCHLD, &oldact, NULL) == -1) {
+ log_perror(errno, "restoring old SIGCHLD handler failed");
+ exit(1);
+ }
+
+ dbus_request_osso_browser_name(ctx);
+}
+
+/* Launch a new window in Fremantle MicroB; don't kill the MicroB process
+ when the session is finished
+ This is designed to work with a prestarted MicroB process that runs
+ continuously in the background */
+void launch_microb_fremantle(struct swb_context *ctx, char *uri) {
+ DBusConnection *raw_connection;
+
+ /* Set up the D-Bus eavesdropping we'll use to watch for MicroB
+ acquiring the com.nokia.osso_browser D-Bus name */
+ if (!(raw_connection = microb_start_dbus_watch_init())) {
+ exit(1);
+ }
+
+ /* Launch a MicroB browser process if it's not already running */
+ if (launch_microb_start_browser_process(raw_connection, -1) < 0)
+ exit(1);
+
+ /* Release the osso_browser D-Bus name so that MicroB can take it */
+ dbus_release_osso_browser_name(ctx);
+
+ /* Wait for MicroB to acquire com.nokia.osso_browser, then make the
+ appropriate method call to open the browser window. */
+ microb_start_dbus_watch_wait(raw_connection);
+ microb_start_dbus_watch_remove(raw_connection);
+ if (!launch_microb_open_window(ctx, uri,
+ LAUNCH_MICROB_BOOKMARK_WIN_OK)) {
+ exit(1);
+ }
+
+ /* Take back the osso_browser D-Bus name from MicroB */
+ dbus_request_osso_browser_name(ctx);
+}
+#endif /* FREMANTLE */
+