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7c609f8142
Most D-Bus interfaces are domain-specific, but these interfaces from the D-Bus Specification are intended to be commonly used in any context for which they are found to be appropriate. Most of these use `gdbusprivate.h`. One exception is that `gio/tests/gdbus-example-*` redefine the constants locally: due to these files' dual role as part of the unit tests and as sample code, it seems desirable to ensure that they can still be compiled outside GLib. Signed-off-by: Simon McVittie <smcv@collabora.com>
394 lines
14 KiB
C
394 lines
14 KiB
C
#include <gio/gio.h>
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#include <stdlib.h>
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#ifdef G_OS_UNIX
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#include <gio/gunixfdlist.h>
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/* For STDOUT_FILENO */
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#include <unistd.h>
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#endif
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#define DBUS_INTERFACE_PROPERTIES "org.freedesktop.DBus.Properties"
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/* ---------------------------------------------------------------------------------------------------- */
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static GDBusNodeInfo *introspection_data = NULL;
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/* Introspection data for the service we are exporting */
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static const gchar introspection_xml[] =
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"<node>"
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" <interface name='org.gtk.GDBus.TestInterface'>"
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" <annotation name='org.gtk.GDBus.Annotation' value='OnInterface'/>"
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" <annotation name='org.gtk.GDBus.Annotation' value='AlsoOnInterface'/>"
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" <method name='HelloWorld'>"
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" <annotation name='org.gtk.GDBus.Annotation' value='OnMethod'/>"
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" <arg type='s' name='greeting' direction='in'/>"
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" <arg type='s' name='response' direction='out'/>"
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" </method>"
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" <method name='EmitSignal'>"
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" <arg type='d' name='speed_in_mph' direction='in'>"
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" <annotation name='org.gtk.GDBus.Annotation' value='OnArg'/>"
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" </arg>"
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" </method>"
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" <method name='GimmeStdout'/>"
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" <signal name='VelocityChanged'>"
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" <annotation name='org.gtk.GDBus.Annotation' value='Onsignal'/>"
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" <arg type='d' name='speed_in_mph'/>"
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" <arg type='s' name='speed_as_string'>"
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" <annotation name='org.gtk.GDBus.Annotation' value='OnArg_NonFirst'/>"
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" </arg>"
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" </signal>"
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" <property type='s' name='FluxCapicitorName' access='read'>"
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" <annotation name='org.gtk.GDBus.Annotation' value='OnProperty'>"
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" <annotation name='org.gtk.GDBus.Annotation' value='OnAnnotation_YesThisIsCrazy'/>"
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" </annotation>"
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" </property>"
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" <property type='s' name='Title' access='readwrite'/>"
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" <property type='s' name='ReadingAlwaysThrowsError' access='read'/>"
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" <property type='s' name='WritingAlwaysThrowsError' access='readwrite'/>"
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" <property type='s' name='OnlyWritable' access='write'/>"
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" <property type='s' name='Foo' access='read'/>"
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" <property type='s' name='Bar' access='read'/>"
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" </interface>"
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"</node>";
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/* ---------------------------------------------------------------------------------------------------- */
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static void
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handle_method_call (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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GDBusMethodInvocation *invocation,
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gpointer user_data)
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{
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if (g_strcmp0 (method_name, "HelloWorld") == 0)
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{
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const gchar *greeting;
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g_variant_get (parameters, "(&s)", &greeting);
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if (g_strcmp0 (greeting, "Return Unregistered") == 0)
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{
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g_dbus_method_invocation_return_error (invocation,
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G_IO_ERROR,
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G_IO_ERROR_FAILED_HANDLED,
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"As requested, here's a GError not registered (G_IO_ERROR_FAILED_HANDLED)");
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}
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else if (g_strcmp0 (greeting, "Return Registered") == 0)
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{
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g_dbus_method_invocation_return_error (invocation,
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G_DBUS_ERROR,
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G_DBUS_ERROR_MATCH_RULE_NOT_FOUND,
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"As requested, here's a GError that is registered (G_DBUS_ERROR_MATCH_RULE_NOT_FOUND)");
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}
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else if (g_strcmp0 (greeting, "Return Raw") == 0)
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{
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g_dbus_method_invocation_return_dbus_error (invocation,
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"org.gtk.GDBus.SomeErrorName",
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"As requested, here's a raw D-Bus error");
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}
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else
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{
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gchar *response;
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response = g_strdup_printf ("You greeted me with '%s'. Thanks!", greeting);
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g_dbus_method_invocation_return_value (invocation,
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g_variant_new ("(s)", response));
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g_free (response);
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}
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}
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else if (g_strcmp0 (method_name, "EmitSignal") == 0)
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{
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GError *local_error;
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gdouble speed_in_mph;
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gchar *speed_as_string;
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g_variant_get (parameters, "(d)", &speed_in_mph);
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speed_as_string = g_strdup_printf ("%g mph!", speed_in_mph);
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local_error = NULL;
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g_dbus_connection_emit_signal (connection,
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NULL,
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object_path,
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interface_name,
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"VelocityChanged",
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g_variant_new ("(ds)",
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speed_in_mph,
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speed_as_string),
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&local_error);
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g_assert_no_error (local_error);
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g_free (speed_as_string);
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g_dbus_method_invocation_return_value (invocation, NULL);
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}
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else if (g_strcmp0 (method_name, "GimmeStdout") == 0)
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{
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#ifdef G_OS_UNIX
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if (g_dbus_connection_get_capabilities (connection) & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING)
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{
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GDBusMessage *reply;
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GUnixFDList *fd_list;
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GError *error;
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fd_list = g_unix_fd_list_new ();
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error = NULL;
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g_unix_fd_list_append (fd_list, STDOUT_FILENO, &error);
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g_assert_no_error (error);
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reply = g_dbus_message_new_method_reply (g_dbus_method_invocation_get_message (invocation));
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g_dbus_message_set_unix_fd_list (reply, fd_list);
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error = NULL;
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g_dbus_connection_send_message (connection,
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reply,
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G_DBUS_SEND_MESSAGE_FLAGS_NONE,
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NULL, /* out_serial */
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&error);
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g_assert_no_error (error);
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g_object_unref (invocation);
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g_object_unref (fd_list);
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g_object_unref (reply);
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}
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else
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{
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g_dbus_method_invocation_return_dbus_error (invocation,
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"org.gtk.GDBus.Failed",
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"Your message bus daemon does not support file descriptor passing (need D-Bus >= 1.3.0)");
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}
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#else
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g_dbus_method_invocation_return_dbus_error (invocation,
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"org.gtk.GDBus.NotOnUnix",
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"Your OS does not support file descriptor passing");
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#endif
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}
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}
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static gchar *_global_title = NULL;
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static gboolean swap_a_and_b = FALSE;
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static GVariant *
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handle_get_property (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *property_name,
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GError **error,
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gpointer user_data)
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{
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GVariant *ret;
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ret = NULL;
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if (g_strcmp0 (property_name, "FluxCapicitorName") == 0)
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{
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ret = g_variant_new_string ("DeLorean");
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}
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else if (g_strcmp0 (property_name, "Title") == 0)
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{
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if (_global_title == NULL)
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_global_title = g_strdup ("Back To C!");
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ret = g_variant_new_string (_global_title);
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}
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else if (g_strcmp0 (property_name, "ReadingAlwaysThrowsError") == 0)
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{
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_FAILED,
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"Hello %s. I thought I said reading this property "
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"always results in an error. kthxbye",
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sender);
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}
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else if (g_strcmp0 (property_name, "WritingAlwaysThrowsError") == 0)
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{
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ret = g_variant_new_string ("There's no home like home");
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}
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else if (g_strcmp0 (property_name, "Foo") == 0)
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{
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ret = g_variant_new_string (swap_a_and_b ? "Tock" : "Tick");
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}
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else if (g_strcmp0 (property_name, "Bar") == 0)
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{
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ret = g_variant_new_string (swap_a_and_b ? "Tick" : "Tock");
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}
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return ret;
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}
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static gboolean
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handle_set_property (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *property_name,
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GVariant *value,
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GError **error,
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gpointer user_data)
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{
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if (g_strcmp0 (property_name, "Title") == 0)
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{
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if (g_strcmp0 (_global_title, g_variant_get_string (value, NULL)) != 0)
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{
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GVariantBuilder *builder;
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GError *local_error;
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g_free (_global_title);
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_global_title = g_variant_dup_string (value, NULL);
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local_error = NULL;
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builder = g_variant_builder_new (G_VARIANT_TYPE_ARRAY);
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g_variant_builder_add (builder,
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"{sv}",
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"Title",
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g_variant_new_string (_global_title));
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g_dbus_connection_emit_signal (connection,
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NULL,
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object_path,
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DBUS_INTERFACE_PROPERTIES,
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"PropertiesChanged",
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g_variant_new ("(sa{sv}as)",
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interface_name,
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builder,
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NULL),
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&local_error);
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g_assert_no_error (local_error);
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}
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}
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else if (g_strcmp0 (property_name, "ReadingAlwaysThrowsError") == 0)
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{
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/* do nothing - they can't read it after all! */
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}
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else if (g_strcmp0 (property_name, "WritingAlwaysThrowsError") == 0)
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{
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_FAILED,
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"Hello AGAIN %s. I thought I said writing this property "
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"always results in an error. kthxbye",
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sender);
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}
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return *error == NULL;
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}
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/* for now */
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static const GDBusInterfaceVTable interface_vtable =
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{
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handle_method_call,
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handle_get_property,
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handle_set_property,
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{ 0 }
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};
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/* ---------------------------------------------------------------------------------------------------- */
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static gboolean
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on_timeout_cb (gpointer user_data)
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{
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GDBusConnection *connection = G_DBUS_CONNECTION (user_data);
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GVariantBuilder *builder;
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GVariantBuilder *invalidated_builder;
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GError *error;
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swap_a_and_b = !swap_a_and_b;
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error = NULL;
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builder = g_variant_builder_new (G_VARIANT_TYPE_ARRAY);
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invalidated_builder = g_variant_builder_new (G_VARIANT_TYPE ("as"));
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g_variant_builder_add (builder,
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"{sv}",
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"Foo",
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g_variant_new_string (swap_a_and_b ? "Tock" : "Tick"));
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g_variant_builder_add (builder,
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"{sv}",
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"Bar",
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g_variant_new_string (swap_a_and_b ? "Tick" : "Tock"));
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g_dbus_connection_emit_signal (connection,
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NULL,
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"/org/gtk/GDBus/TestObject",
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DBUS_INTERFACE_PROPERTIES,
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"PropertiesChanged",
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g_variant_new ("(sa{sv}as)",
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"org.gtk.GDBus.TestInterface",
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builder,
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invalidated_builder),
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&error);
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g_assert_no_error (error);
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return G_SOURCE_CONTINUE;
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}
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/* ---------------------------------------------------------------------------------------------------- */
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static void
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on_bus_acquired (GDBusConnection *connection,
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const gchar *name,
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gpointer user_data)
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{
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guint registration_id;
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registration_id = g_dbus_connection_register_object (connection,
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"/org/gtk/GDBus/TestObject",
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introspection_data->interfaces[0],
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&interface_vtable,
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NULL, /* user_data */
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NULL, /* user_data_free_func */
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NULL); /* GError** */
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g_assert (registration_id > 0);
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/* swap value of properties Foo and Bar every two seconds */
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g_timeout_add_seconds (2,
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on_timeout_cb,
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connection);
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}
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static void
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on_name_acquired (GDBusConnection *connection,
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const gchar *name,
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gpointer user_data)
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{
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}
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static void
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on_name_lost (GDBusConnection *connection,
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const gchar *name,
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gpointer user_data)
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{
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exit (1);
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}
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int
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main (int argc, char *argv[])
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{
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guint owner_id;
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GMainLoop *loop;
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/* We are lazy here - we don't want to manually provide
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* the introspection data structures - so we just build
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* them from XML.
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*/
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introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
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g_assert (introspection_data != NULL);
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owner_id = g_bus_own_name (G_BUS_TYPE_SESSION,
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"org.gtk.GDBus.TestServer",
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G_BUS_NAME_OWNER_FLAGS_NONE,
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on_bus_acquired,
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on_name_acquired,
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on_name_lost,
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NULL,
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NULL);
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loop = g_main_loop_new (NULL, FALSE);
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g_main_loop_run (loop);
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g_bus_unown_name (owner_id);
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g_dbus_node_info_unref (introspection_data);
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return 0;
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}
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