*
* at-spi-bus-launcher: Manage the a11y bus as a child process
*
- * Copyright 2011 Red Hat, Inc.
+ * Copyright 2011-2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
#include <unistd.h>
#include <string.h>
#include <signal.h>
+#ifdef __linux__
+#include <sys/prctl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#endif
#include <sys/wait.h>
#include <errno.h>
#include <stdio.h>
GDBusConnection *session_bus;
GSettings *a11y_schema;
GSettings *interface_schema;
+ int name_owner_id;
A11yBusClient screen_reader;
A11yBusClient universal_switch;
int a11y_bus_pid;
char *a11y_bus_address;
int pipefd[2];
+ int listenfd;
char *a11y_launch_error_message;
} A11yBusLauncher;
register_client (app);
}
-static void
-setup_bus_child (gpointer data)
-{
- A11yBusLauncher *app = data;
- (void) app;
-
- close (app->pipefd[0]);
- dup2 (app->pipefd[1], 3);
- close (app->pipefd[1]);
-
- /* On Linux, tell the bus process to exit if this process goes away */
-#ifdef __linux
-#include <sys/prctl.h>
- prctl (PR_SET_PDEATHSIG, 15);
-#endif
-}
-
/**
* unix_read_all_fd_to_string:
*
{
ssize_t bytes_read;
- while (max_bytes > 1 && (bytes_read = read (fd, buf, MAX (4096, max_bytes - 1))))
+ while (max_bytes > 1 && (bytes_read = read (fd, buf, MIN (4096, max_bytes - 1))))
{
if (bytes_read < 0)
return FALSE;
g_main_loop_quit (app->loop);
}
+#ifdef DBUS_DAEMON
+static void
+setup_bus_child_daemon (gpointer data)
+{
+ A11yBusLauncher *app = data;
+ (void) app;
+
+ close (app->pipefd[0]);
+ dup2 (app->pipefd[1], 3);
+ close (app->pipefd[1]);
+
+ /* On Linux, tell the bus process to exit if this process goes away */
+#ifdef __linux__
+ prctl (PR_SET_PDEATHSIG, 15);
+#endif
+}
+
static gboolean
-ensure_a11y_bus (A11yBusLauncher *app)
+ensure_a11y_bus_daemon (A11yBusLauncher *app, char *config_path)
{
+ char *argv[] = { DBUS_DAEMON, config_path, "--nofork", "--print-address", "3", NULL };
GPid pid;
- char *argv[] = { DBUS_DAEMON, NULL, "--nofork", "--print-address", "3", NULL };
char addr_buf[2048];
GError *error = NULL;
- const char *config_path = NULL;
if (app->a11y_bus_pid != 0)
return FALSE;
- if (g_file_test (SYSCONFDIR"/at-spi2/accessibility.conf", G_FILE_TEST_EXISTS))
- config_path = "--config-file="SYSCONFDIR"/at-spi2/accessibility.conf";
- else
- config_path = "--config-file="DATADIR"/defaults/at-spi2/accessibility.conf";
-
argv[1] = (char*)config_path;
if (pipe (app->pipefd) < 0)
g_error ("Failed to create pipe: %s", strerror (errno));
+ g_clear_pointer (&app->a11y_launch_error_message, g_free);
+
if (!g_spawn_async (NULL,
argv,
NULL,
G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD,
- setup_bus_child,
+ setup_bus_child_daemon,
app,
&pid,
&error))
app->a11y_bus_address = g_strchomp (g_strdup (addr_buf));
LOGD("a11y bus address: %s", app->a11y_bus_address);
+ return TRUE;
+
+error:
+ close (app->pipefd[0]);
+ close (app->pipefd[1]);
+ app->state = A11Y_BUS_STATE_ERROR;
+
+ return FALSE;
+}
+#else
+static gboolean
+ensure_a11y_bus_daemon (A11yBusLauncher *app, char *config_path)
+{
+ return FALSE;
+}
+#endif
+
+#ifdef DBUS_BROKER
+static void
+setup_bus_child_broker (gpointer data)
+{
+ A11yBusLauncher *app = data;
+ gchar *pid_str;
+ (void) app;
+
+ dup2 (app->listenfd, 3);
+ close (app->listenfd);
+ g_setenv("LISTEN_FDS", "1", TRUE);
+
+ pid_str = g_strdup_printf("%u", getpid());
+ g_setenv("LISTEN_PID", pid_str, TRUE);
+ g_free(pid_str);
+
+ /* Tell the bus process to exit if this process goes away */
+ prctl (PR_SET_PDEATHSIG, SIGTERM);
+}
+
+static gboolean
+ensure_a11y_bus_broker (A11yBusLauncher *app, char *config_path)
+{
+ char *argv[] = { DBUS_BROKER, config_path, "--scope", "user", NULL };
+ struct sockaddr_un addr = { .sun_family = AF_UNIX };
+ socklen_t addr_len = sizeof(addr);
+ GPid pid;
+ GError *error = NULL;
+
+ if ((app->listenfd = socket (PF_UNIX, SOCK_STREAM | SOCK_NONBLOCK, 0)) < 0)
+ g_error ("Failed to create listening socket: %s", strerror (errno));
+
+ if (bind (app->listenfd, (struct sockaddr *)&addr, sizeof(sa_family_t)) < 0)
+ g_error ("Failed to bind listening socket: %s", strerror (errno));
+
+ if (getsockname (app->listenfd, (struct sockaddr *)&addr, &addr_len) < 0)
+ g_error ("Failed to get socket name for listening socket: %s", strerror(errno));
+
+ if (listen (app->listenfd, 1024) < 0)
+ g_error ("Failed to listen on socket: %s", strerror(errno));
+
+ g_clear_pointer (&app->a11y_launch_error_message, g_free);
+
+ if (!g_spawn_async (NULL,
+ argv,
+ NULL,
+ G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD,
+ setup_bus_child_broker,
+ app,
+ &pid,
+ &error))
+ {
+ app->a11y_bus_pid = -1;
+ app->a11y_launch_error_message = g_strdup (error->message);
+ g_clear_error (&error);
+ goto error;
+ }
+
+ close (app->listenfd);
+ app->listenfd = -1;
+
+ g_child_watch_add (pid, on_bus_exited, app);
+ app->a11y_bus_pid = pid;
+ g_debug ("Launched a11y bus, child is %ld", (long) pid);
+ app->state = A11Y_BUS_STATE_RUNNING;
+
+ app->a11y_bus_address = g_strconcat("unix:abstract=", addr.sun_path + 1, NULL);
+ g_debug ("a11y bus address: %s", app->a11y_bus_address);
+
+ return TRUE;
+
+error:
+ close (app->listenfd);
+ app->state = A11Y_BUS_STATE_ERROR;
+
+ return FALSE;
+}
+#else
+static gboolean
+ensure_a11y_bus_broker (A11yBusLauncher *app, char *config_path)
+{
+ return FALSE;
+}
+#endif
+
+static gboolean
+ensure_a11y_bus (A11yBusLauncher *app)
+{
+ char *config_path = NULL;
+ gboolean success = FALSE;
+
+ if (app->a11y_bus_pid != 0)
+ return FALSE;
+
+ if (g_file_test (SYSCONFDIR"/at-spi2/accessibility.conf", G_FILE_TEST_EXISTS))
+ config_path = "--config-file="SYSCONFDIR"/at-spi2/accessibility.conf";
+ else
+ config_path = "--config-file="DATADIR"/defaults/at-spi2/accessibility.conf";
+
+#ifdef WANT_DBUS_BROKER
+ success = ensure_a11y_bus_broker (app, config_path);
+ if (!success)
+ {
+ if (!ensure_a11y_bus_daemon (app, config_path))
+ return FALSE;
+ }
+#else
+ success = ensure_a11y_bus_daemon (app, config_path);
+ if (!success)
+ {
+ if (!ensure_a11y_bus_broker (app, config_path))
+ return FALSE;
+ }
+#endif
+
#ifdef HAVE_X11
{
Display *display = XOpenDisplay (NULL);
#endif
return TRUE;
-
- error:
- close (app->pipefd[0]);
- close (app->pipefd[1]);
- app->state = A11Y_BUS_STATE_ERROR;
-
- return FALSE;
}
static void
static GSettings *
get_schema (const gchar *name)
{
+#if GLIB_CHECK_VERSION (2, 32, 0)
+ GSettingsSchemaSource *source = g_settings_schema_source_get_default ();
+ GSettingsSchema *schema = g_settings_schema_source_lookup (source, name, FALSE);
+
+ if (schema == NULL)
+ return NULL;
+
+ return g_settings_new_full (schema, NULL, NULL);
+#else
const char * const *schemas = NULL;
gint i;
}
return NULL;
+#endif
}
static void
#endif
LOGD("Starting atspi bus launcher");
+
gboolean a11y_set = FALSE;
gboolean screen_reader_set = FALSE;
gint i;
projects / platform / upstream / at-spi2-core.git / blobdiff