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Diffstat (limited to 'src/dbusbind.c')
| -rw-r--r-- | src/dbusbind.c | 824 |
1 files changed, 824 insertions, 0 deletions
diff --git a/src/dbusbind.c b/src/dbusbind.c new file mode 100644 index 00000000000..311aee550f6 --- /dev/null +++ b/src/dbusbind.c @@ -0,0 +1,824 @@ +/* Elisp bindings for D-Bus. + Copyright (C) 2007 Free Software Foundation, Inc. + +This file is part of GNU Emacs. + +GNU Emacs is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GNU Emacs 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 General Public License +along with GNU Emacs; see the file COPYING. If not, write to +the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +#include "config.h" + +#ifdef HAVE_DBUS +#include <stdlib.h> +#include <dbus/dbus.h> +#include "lisp.h" +#include "frame.h" +#include "termhooks.h" +#include "keyboard.h" + + +/* Subroutines. */ +Lisp_Object Qdbus_get_unique_name; +Lisp_Object Qdbus_call_method; +Lisp_Object Qdbus_send_signal; +Lisp_Object Qdbus_register_signal; +Lisp_Object Qdbus_unregister_signal; + +/* D-Bus error symbol. */ +Lisp_Object Qdbus_error; + +/* Lisp symbols of the system and session buses. */ +Lisp_Object Qdbus_system_bus, Qdbus_session_bus; + +/* Obarray which keeps interned symbols. */ +Lisp_Object Vdbus_intern_symbols; + +/* Whether to debug D-Bus. */ +Lisp_Object Vdbus_debug; + + +/* We use "xd_" and "XD_" as prefix for all internal symbols, because + we don't want to poison other namespaces with "dbus_". */ + +/* Create a new interned symbol which represents a function handler. + bus is a Lisp symbol, either :system or :session. interface and + member are both Lisp strings. + + D-Bus sends messages, which are captured by Emacs in the main loop, + converted into an event then. Emacs must identify a message from + D-Bus, in order to call the right Lisp function when the event is + handled in the event handler function of dbus.el. + + A D-Bus message is determined at least by the D-Bus bus it is + raised from (system bus or session bus), the interface and the + method the message belongs to. There could be even more properties + for determination, but that isn't implemented yet. + + The approach is to create a new interned Lisp symbol once there is + a registration request for a given signal, which is a special D-Bus + message. The symbol's name is a concatenation of the bus name, + interface name and method name of the signal; the function cell is + the Lisp function to be called when such a signal arrives. Since + this code runs in the main loop, receiving input, it must be + performant. */ +#define XD_SYMBOL_INTERN_SYMBOL(symbol, bus, interface, member) \ + { \ + XD_DEBUG_VALID_LISP_OBJECT_P (bus); \ + XD_DEBUG_VALID_LISP_OBJECT_P (interface); \ + XD_DEBUG_VALID_LISP_OBJECT_P (member); \ + char s[1024]; \ + strcpy (s, SDATA (SYMBOL_NAME (bus))); \ + strcat (s, "."); \ + strcat (s, SDATA (interface)); \ + strcat (s, "."); \ + strcat (s, SDATA (member)); \ + symbol = Fintern (build_string (s), Vdbus_intern_symbols); \ + } + +/* Raise a Lisp error from a D-Bus error. */ +#define XD_ERROR(error) \ + { \ + char s[1024]; \ + strcpy (s, error.message); \ + dbus_error_free (&error); \ + /* Remove the trailing newline. */ \ + if (strchr (s, '\n') != NULL) \ + s[strlen (s) - 1] = '\0'; \ + xsignal1 (Qdbus_error, build_string (s)); \ + } + +/* Macros for debugging. In order to enable them, build with + "make MYCPPFLAGS='-DDBUS_DEBUG'". */ +#ifdef DBUS_DEBUG +#define XD_DEBUG_MESSAGE(...) \ + { \ + char s[1024]; \ + sprintf (s, __VA_ARGS__); \ + printf ("%s: %s\n", __func__, s); \ + message ("%s: %s", __func__, s); \ + } +#define XD_DEBUG_VALID_LISP_OBJECT_P(object) \ + if (!valid_lisp_object_p (object)) \ + { \ + XD_DEBUG_MESSAGE ("%s Assertion failure", __LINE__); \ + xsignal1 (Qdbus_error, build_string ("Assertion failure")); \ + } + +#else /* !DBUS_DEBUG */ +#define XD_DEBUG_MESSAGE(...) \ + if (!NILP (Vdbus_debug)) \ + { \ + char s[1024]; \ + sprintf (s, __VA_ARGS__); \ + message ("%s: %s", __func__, s); \ + } +#define XD_DEBUG_VALID_LISP_OBJECT_P(object) +#endif + +/* Determine the DBusType of a given Lisp object. It is used to + convert Lisp objects, being arguments of `dbus-call-method' or + `dbus-send-signal', into corresponding C values appended as + arguments to a D-Bus message. */ +#define XD_LISP_OBJECT_TO_DBUS_TYPE(object) \ + (EQ (object, Qt) || EQ (object, Qnil)) ? DBUS_TYPE_BOOLEAN : \ + (NATNUMP (object)) ? DBUS_TYPE_UINT32 : \ + (INTEGERP (object)) ? DBUS_TYPE_INT32 : \ + (FLOATP (object)) ? DBUS_TYPE_DOUBLE : \ + (STRINGP (object)) ? DBUS_TYPE_STRING : \ + DBUS_TYPE_INVALID + +/* Extract C value from Lisp OBJECT. DTYPE must be a valid DBusType, + as detected by XD_LISP_OBJECT_TO_DBUS_TYPE. Compound types are not + supported (yet). It is used to convert Lisp objects, being + arguments of `dbus-call-method' or `dbus-send-signal', into + corresponding C values appended as arguments to a D-Bus + message. */ +char * +xd_retrieve_value (dtype, object) + uint dtype; + Lisp_Object object; +{ + + XD_DEBUG_VALID_LISP_OBJECT_P (object); + switch (dtype) + { + case DBUS_TYPE_BOOLEAN: + XD_DEBUG_MESSAGE ("%d %s", dtype, (NILP (object)) ? "false" : "true"); + return (NILP (object)) ? (char *) FALSE : (char *) TRUE; + case DBUS_TYPE_UINT32: + XD_DEBUG_MESSAGE ("%d %d", dtype, XUINT (object)); + return (char *) XUINT (object); + case DBUS_TYPE_INT32: + XD_DEBUG_MESSAGE ("%d %d", dtype, XINT (object)); + return (char *) XINT (object); + case DBUS_TYPE_DOUBLE: + XD_DEBUG_MESSAGE ("%d %d", dtype, XFLOAT (object)); + return (char *) XFLOAT (object); + case DBUS_TYPE_STRING: + XD_DEBUG_MESSAGE ("%d %s", dtype, SDATA (object)); + return SDATA (object); + default: + XD_DEBUG_MESSAGE ("DBus-Type %d not supported", dtype); + return NULL; + } +} + +/* Retrieve C value from a DBusMessageIter structure ITER, and return + a converted Lisp object. The type DTYPE of the argument of the + D-Bus message must be a valid DBusType. Compound D-Bus types are + partly supported; they result always in a Lisp list. */ +Lisp_Object +xd_retrieve_arg (dtype, iter) + uint dtype; + DBusMessageIter *iter; +{ + + switch (dtype) + { + case DBUS_TYPE_BOOLEAN: + { + dbus_bool_t val; + dbus_message_iter_get_basic (iter, &val); + XD_DEBUG_MESSAGE ("%d %s", dtype, (val == FALSE) ? "false" : "true"); + return (val == FALSE) ? Qnil : Qt; + } + case DBUS_TYPE_INT32: + case DBUS_TYPE_UINT32: + { + dbus_uint32_t val; + dbus_message_iter_get_basic (iter, &val); + XD_DEBUG_MESSAGE ("%d %d", dtype, val); + return make_number (val); + } + case DBUS_TYPE_STRING: + case DBUS_TYPE_OBJECT_PATH: + { + char *val; + dbus_message_iter_get_basic (iter, &val); + XD_DEBUG_MESSAGE ("%d %s", dtype, val); + return build_string (val); + } + case DBUS_TYPE_ARRAY: + case DBUS_TYPE_VARIANT: + case DBUS_TYPE_STRUCT: + case DBUS_TYPE_DICT_ENTRY: + { + Lisp_Object result; + struct gcpro gcpro1; + result = Qnil; + GCPRO1 (result); + DBusMessageIter subiter; + int subtype; + dbus_message_iter_recurse (iter, &subiter); + while ((subtype = dbus_message_iter_get_arg_type (&subiter)) + != DBUS_TYPE_INVALID) + { + result = Fcons (xd_retrieve_arg (subtype, &subiter), result); + dbus_message_iter_next (&subiter); + } + RETURN_UNGCPRO (Fnreverse (result)); + } + default: + XD_DEBUG_MESSAGE ("DBusType %d not supported", dtype); + return Qnil; + } +} + + +/* Initialize D-Bus connection. BUS is a Lisp symbol, either :system + or :session. It tells which D-Bus to be initialized. */ +DBusConnection * +xd_initialize (bus) + Lisp_Object bus; +{ + DBusConnection *connection; + DBusError derror; + + /* Parameter check. */ + CHECK_SYMBOL (bus); + if (!((EQ (bus, Qdbus_system_bus)) || (EQ (bus, Qdbus_session_bus)))) + xsignal2 (Qdbus_error, build_string ("Wrong bus name"), bus); + + /* Open a connection to the bus. */ + dbus_error_init (&derror); + + if (EQ (bus, Qdbus_system_bus)) + connection = dbus_bus_get (DBUS_BUS_SYSTEM, &derror); + else + connection = dbus_bus_get (DBUS_BUS_SESSION, &derror); + + if (dbus_error_is_set (&derror)) + XD_ERROR (derror); + + if (connection == NULL) + xsignal2 (Qdbus_error, build_string ("No connection"), bus); + + /* Return the result. */ + return connection; +} + +DEFUN ("dbus-get-unique-name", Fdbus_get_unique_name, Sdbus_get_unique_name, + 1, 1, 0, + doc: /* Return the unique name of Emacs registered at D-Bus BUS as string. */) + (bus) + Lisp_Object bus; +{ + DBusConnection *connection; + char name[1024]; + + /* Check parameters. */ + CHECK_SYMBOL (bus); + + /* Open a connection to the bus. */ + connection = xd_initialize (bus); + + /* Request the name. */ + strcpy (name, dbus_bus_get_unique_name (connection)); + if (name == NULL) + xsignal1 (Qdbus_error, build_string ("No unique name available")); + + /* Return. */ + return build_string (name); +} + +DEFUN ("dbus-call-method", Fdbus_call_method, Sdbus_call_method, 5, MANY, 0, + doc: /* Call METHOD on the D-Bus BUS. + +BUS is either the symbol `:system' or the symbol `:session'. + +SERVICE is the D-Bus service name to be used. PATH is the D-Bus +object path SERVICE is registered at. INTERFACE is an interface +offered by SERVICE. It must provide METHOD. + +All other arguments ARGS are passed to METHOD as arguments. They are +converted into D-Bus types via the following rules: + + t and nil => DBUS_TYPE_BOOLEAN + number => DBUS_TYPE_UINT32 + integer => DBUS_TYPE_INT32 + float => DBUS_TYPE_DOUBLE + string => DBUS_TYPE_STRING + +Other Lisp objects are not supported as input arguments of METHOD. + +`dbus-call-method' returns the resulting values of METHOD as a list of +Lisp objects. The type conversion happens the other direction as for +input arguments. Additionally to the types supported for input +arguments, the D-Bus compound types DBUS_TYPE_ARRAY, DBUS_TYPE_VARIANT, +DBUS_TYPE_STRUCT and DBUS_TYPE_DICT_ENTRY are accepted. All of them +are converted into a list of Lisp objects which correspond to the +elements of the D-Bus container. Example: + +\(dbus-call-method + :session "GetKeyField" "org.gnome.seahorse" + "/org/gnome/seahorse/keys/openpgp" "org.gnome.seahorse.Keys" + "openpgp:657984B8C7A966DD" "simple-name") + + => (t ("Philip R. Zimmermann")) + +If the result of the METHOD call is just one value, the converted Lisp +object is returned instead of a list containing this single Lisp object. + +\(dbus-call-method + :system "GetPropertyString" "org.freedesktop.Hal" + "/org/freedesktop/Hal/devices/computer" "org.freedesktop.Hal.Device" + "system.kernel.machine") + + => "i686" + +usage: (dbus-call-method BUS METHOD SERVICE PATH INTERFACE &rest ARGS) */) + (nargs, args) + int nargs; + register Lisp_Object *args; +{ + Lisp_Object bus, method, service, path, interface; + Lisp_Object result; + struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; + DBusConnection *connection; + DBusMessage *dmessage; + DBusMessage *reply; + DBusMessageIter iter; + DBusError derror; + uint dtype; + int i; + char *value; + + /* Check parameters. */ + bus = args[0]; + method = args[1]; + service = args[2]; + path = args[3]; + interface = args[4]; + + CHECK_SYMBOL (bus); + CHECK_STRING (method); + CHECK_STRING (service); + CHECK_STRING (path); + CHECK_STRING (interface); + GCPRO5 (bus, method, service, path, interface); + + XD_DEBUG_MESSAGE ("%s %s %s %s", + SDATA (method), + SDATA (service), + SDATA (path), + SDATA (interface)); + + /* Open a connection to the bus. */ + connection = xd_initialize (bus); + + /* Create the message. */ + dmessage = dbus_message_new_method_call (SDATA (service), + SDATA (path), + SDATA (interface), + SDATA (method)); + if (dmessage == NULL) + { + UNGCPRO; + xsignal1 (Qdbus_error, build_string ("Unable to create a new message")); + } + + UNGCPRO; + + /* Append parameters to the message. */ + for (i = 5; i < nargs; ++i) + { + + XD_DEBUG_VALID_LISP_OBJECT_P (args[i]); + XD_DEBUG_MESSAGE ("Parameter%d %s", + i-4, + SDATA (format2 ("%s", args[i], Qnil))); + + dtype = XD_LISP_OBJECT_TO_DBUS_TYPE (args[i]); + if (dtype == DBUS_TYPE_INVALID) + xsignal2 (Qdbus_error, build_string ("Not a valid argument"), args[i]); + + value = (char *) xd_retrieve_value (dtype, args[i]); + + if (!dbus_message_append_args (dmessage, + dtype, + &value, + DBUS_TYPE_INVALID)) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), args[i]); + } + + /* Send the message. */ + dbus_error_init (&derror); + reply = dbus_connection_send_with_reply_and_block (connection, + dmessage, + -1, + &derror); + + if (dbus_error_is_set (&derror)) + XD_ERROR (derror); + + if (reply == NULL) + xsignal1 (Qdbus_error, build_string ("No reply")); + + XD_DEBUG_MESSAGE ("Message sent"); + + /* Collect the results. */ + result = Qnil; + GCPRO1 (result); + + if (!dbus_message_iter_init (reply, &iter)) + { + UNGCPRO; + xsignal1 (Qdbus_error, build_string ("Cannot read reply")); + } + + /* Loop over the parameters of the D-Bus reply message. Construct a + Lisp list, which is returned by `dbus-call-method'. */ + while ((dtype = dbus_message_iter_get_arg_type (&iter)) != DBUS_TYPE_INVALID) + { + result = Fcons (xd_retrieve_arg (dtype, &iter), result); + dbus_message_iter_next (&iter); + } + + /* Cleanup. */ + dbus_message_unref (dmessage); + dbus_message_unref (reply); + + /* Return the result. If there is only one single Lisp object, + return it as-it-is, otherwise return the reversed list. */ + if (XUINT (Flength (result)) == 1) + RETURN_UNGCPRO (XCAR (result)); + else + RETURN_UNGCPRO (Fnreverse (result)); +} + +DEFUN ("dbus-send-signal", Fdbus_send_signal, Sdbus_send_signal, 5, MANY, 0, + doc: /* Send signal SIGNAL on the D-Bus BUS. + +BUS is either the symbol `:system' or the symbol `:session'. + +SERVICE is the D-Bus service name SIGNAL is sent from. PATH is the +D-Bus object path SERVICE is registered at. INTERFACE is an interface +offered by SERVICE. It must provide signal SIGNAL. + +All other arguments ARGS are passed to SIGNAL as arguments. They are +converted into D-Bus types via the following rules: + + t and nil => DBUS_TYPE_BOOLEAN + number => DBUS_TYPE_UINT32 + integer => DBUS_TYPE_INT32 + float => DBUS_TYPE_DOUBLE + string => DBUS_TYPE_STRING + +Other Lisp objects are not supported as arguments of SIGNAL. + +Example: + +\(dbus-send-signal + :session "Started" "org.gnu.emacs" "/org/gnu/emacs" "org.gnu.emacs"))) + +usage: (dbus-send-signal BUS SIGNAL SERVICE PATH INTERFACE &rest ARGS) */) + (nargs, args) + int nargs; + register Lisp_Object *args; +{ + Lisp_Object bus, signal, service, path, interface; + struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; + DBusConnection *connection; + DBusMessage *dmessage; + uint dtype; + int i; + char *value; + + /* Check parameters. */ + bus = args[0]; + signal = args[1]; + service = args[2]; + path = args[3]; + interface = args[4]; + + CHECK_SYMBOL (bus); + CHECK_STRING (signal); + CHECK_STRING (service); + CHECK_STRING (path); + CHECK_STRING (interface); + GCPRO5 (bus, signal, service, path, interface); + + XD_DEBUG_MESSAGE ("%s %s %s %s", + SDATA (signal), + SDATA (service), + SDATA (path), + SDATA (interface)); + + /* Open a connection to the bus. */ + connection = xd_initialize (bus); + + /* Create the message. */ + dmessage = dbus_message_new_signal (SDATA (path), + SDATA (interface), + SDATA (signal)); + if (dmessage == NULL) + { + UNGCPRO; + xsignal1 (Qdbus_error, build_string ("Unable to create a new message")); + } + + UNGCPRO; + + /* Append parameters to the message. */ + for (i = 5; i < nargs; ++i) + { + XD_DEBUG_VALID_LISP_OBJECT_P (args[i]); + XD_DEBUG_MESSAGE ("Parameter%d %s", + i-4, + SDATA (format2 ("%s", args[i], Qnil))); + + dtype = XD_LISP_OBJECT_TO_DBUS_TYPE (args[i]); + if (dtype == DBUS_TYPE_INVALID) + xsignal2 (Qdbus_error, build_string ("Not a valid argument"), args[i]); + + value = (char *) xd_retrieve_value (dtype, args[i]); + + if (!dbus_message_append_args (dmessage, + dtype, + &value, + DBUS_TYPE_INVALID)) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), args[i]); + } + + /* Send the message. The message is just added to the outgoing + message queue. */ + if (!dbus_connection_send (connection, dmessage, NULL)) + xsignal1 (Qdbus_error, build_string ("Cannot send message")); + + /* Flush connection to ensure the message is handled. */ + dbus_connection_flush (connection); + + XD_DEBUG_MESSAGE ("Signal sent"); + + /* Cleanup. */ + dbus_message_unref (dmessage); + + /* Return. */ + return Qt; +} + +/* Read queued incoming message of the D-Bus BUS. BUS is a Lisp + symbol, either :system or :session. */ +void +xd_read_message (bus) + Lisp_Object bus; +{ + Lisp_Object symbol; + struct gcpro gcpro1; + static struct input_event event; + DBusConnection *connection; + DBusMessage *dmessage; + DBusMessageIter iter; + uint dtype; + char s1[1024], s2[1024]; + + /* Open a connection to the bus. */ + connection = xd_initialize (bus); + + /* Non blocking read of the next available message. */ + dbus_connection_read_write (connection, 0); + dmessage = dbus_connection_pop_message (connection); + + /* Return if there is no queued message. */ + if (dmessage == NULL) + return; + + /* There is a message in the queue. Construct the D-Bus event. */ + XD_DEBUG_MESSAGE ("Event received"); + EVENT_INIT (event); + + event.kind = DBUS_EVENT; + event.frame_or_window = Qnil; + + /* Collect the parameters. */ + event.arg = Qnil; + GCPRO1 (event.arg); + + if (!dbus_message_iter_init (dmessage, &iter)) + { + UNGCPRO; + XD_DEBUG_MESSAGE ("Cannot read event"); + return; + } + + /* Loop over the resulting parameters. Construct a list. */ + while ((dtype = dbus_message_iter_get_arg_type (&iter)) != DBUS_TYPE_INVALID) + { + event.arg = Fcons (xd_retrieve_arg (dtype, &iter), event.arg); + dbus_message_iter_next (&iter); + } + + /* The arguments are stored in reverse order. Reorder them. */ + event.arg = Fnreverse (event.arg); + + /* Add the object path of the sender of the message. */ + strcpy (s1, dbus_message_get_path (dmessage)); + event.arg = Fcons ((s1 == NULL ? Qnil : build_string (s1)), event.arg); + + /* Add the unique name of the sender of the message. */ + strcpy (s2, dbus_message_get_sender (dmessage)); + event.arg = Fcons ((s2 == NULL ? Qnil : build_string (s2)), event.arg); + + /* Add the interned symbol the message is raised from (signal) or + for (method). */ + strcpy (s1, dbus_message_get_interface (dmessage)); + strcpy (s2, dbus_message_get_member (dmessage)); + XD_SYMBOL_INTERN_SYMBOL + (symbol, bus, + (s1 == NULL ? Qnil : build_string (s1)), + (s2 == NULL ? Qnil : build_string (s2))); + event.arg = Fcons (symbol, event.arg); + + /* Store it into the input event queue. */ + kbd_buffer_store_event (&event); + + /* Cleanup. */ + dbus_message_unref (dmessage); + UNGCPRO; +} + +/* Read queued incoming messages from the system and session buses. */ +void +xd_read_queued_messages () +{ + xd_read_message (Qdbus_system_bus); + xd_read_message (Qdbus_session_bus); +} + +DEFUN ("dbus-register-signal", Fdbus_register_signal, Sdbus_register_signal, + 6, 6, 0, + doc: /* Register for signal SIGNAL on the D-Bus BUS. + +BUS is either the symbol `:system' or the symbol `:session'. + +SERVICE is the D-Bus service name to be used. PATH is the D-Bus +object path SERVICE is registered. INTERFACE is an interface offered +by SERVICE. It must provide SIGNAL. + +HANDLER is a Lisp function to be called when the signal is received. +It must accept as arguments the values SIGNAL is sending. + +Example: + +\(defun my-signal-handler (device) + (message "Device %s added" device)) + +\(dbus-register-signal + :system "DeviceAdded" "org.freedesktop.Hal" + "/org/freedesktop/Hal/Manager" "org.freedesktop.Hal.Manager" + 'my-signal-handler) + + => org.freedesktop.Hal.Manager.DeviceAdded + +`dbus-register-signal' returns an object, which can be used in +`dbus-unregister-signal' for removing the registration. */) + (bus, signal, service, path, interface, handler) + Lisp_Object bus, signal, service, path, interface, handler; +{ + Lisp_Object name_owner, result; + DBusConnection *connection; + DBusError derror; + char rule[1024]; + + /* Check parameters. */ + CHECK_SYMBOL (bus); + CHECK_STRING (signal); + CHECK_STRING (service); + CHECK_STRING (path); + CHECK_STRING (interface); + CHECK_SYMBOL (handler); + + /* Open a connection to the bus. */ + connection = xd_initialize (bus); + +#if 0 + /* TODO: Get name owner. This is the sending service name. */ + name_owner = call2 (intern ("dbus-get-name-owner"), bus, service); +#endif + + /* Add a rule to the bus in order to receive related signals. */ + dbus_error_init (&derror); + sprintf (rule, + "type='signal',interface='%s',member=%s%", + SDATA (interface), + SDATA (signal)); +#if 0 + /* TODO: We need better checks when we want use sender and path. */ + sprintf (rule, + "type='signal',sender='%s',path='%s',interface='%s',member=%s%", + SDATA (name_owner), + SDATA (path), + SDATA (interface), + SDATA (signal)); +#endif + dbus_bus_add_match (connection, rule, &derror); + + if (dbus_error_is_set (&derror)) + XD_ERROR (derror); + + XD_DEBUG_MESSAGE ("Matching rule \"%s\" created", rule); + + /* Create a new protected symbol, which has the complete name of the + signal. The function cell is taken from the handler. */ + result = Qnil; + + XD_SYMBOL_INTERN_SYMBOL (result, bus, interface, signal); + Ffset (result, Fsymbol_function (handler)); + XD_DEBUG_MESSAGE ("\"%s\" registered with handler \"%s\"", + SDATA (format2 ("%s", result, Qnil)), + SDATA (format2 ("%s", Fsymbol_function (result), Qnil))); + + /* Return. */ + return result; +} + +DEFUN ("dbus-unregister-signal", Fdbus_unregister_signal, Sdbus_unregister_signal, + 1, 1, 0, + doc: /* Unregister OBJECT from the D-Bus. +OBJECT must be the result of a preceding `dbus-register-signal' call. */) + (object) + Lisp_Object object; +{ + + /* Check parameters. */ + CHECK_SYMBOL (object); + + XD_DEBUG_MESSAGE ("\"%s\" unregistered with handler \"%s\"", + SDATA (format2 ("%s", object, Qnil)), + SDATA (format2 ("%s", Fsymbol_function (object), Qnil))); + + /* Unintern the signal symbol. */ + Funintern (object, Vdbus_intern_symbols); + + /* Return. */ + return Qnil; +} + + +void +syms_of_dbusbind () +{ + + Qdbus_get_unique_name = intern ("dbus-get-unique-name"); + staticpro (&Qdbus_get_unique_name); + defsubr (&Sdbus_get_unique_name); + + Qdbus_call_method = intern ("dbus-call-method"); + staticpro (&Qdbus_call_method); + defsubr (&Sdbus_call_method); + + Qdbus_send_signal = intern ("dbus-send-signal"); + staticpro (&Qdbus_send_signal); + defsubr (&Sdbus_send_signal); + + Qdbus_register_signal = intern ("dbus-register-signal"); + staticpro (&Qdbus_register_signal); + defsubr (&Sdbus_register_signal); + + Qdbus_unregister_signal = intern ("dbus-unregister-signal"); + staticpro (&Qdbus_unregister_signal); + defsubr (&Sdbus_unregister_signal); + + Qdbus_error = intern ("dbus-error"); + staticpro (&Qdbus_error); + Fput (Qdbus_error, Qerror_conditions, + list2 (Qdbus_error, Qerror)); + Fput (Qdbus_error, Qerror_message, + build_string ("D-Bus error")); + + Qdbus_system_bus = intern (":system"); + staticpro (&Qdbus_system_bus); + + Qdbus_session_bus = intern (":session"); + staticpro (&Qdbus_session_bus); + + Vdbus_intern_symbols = Fmake_vector (make_number (64), 0); + staticpro (&Vdbus_intern_symbols); + + DEFVAR_LISP ("dbus-debug", &Vdbus_debug, + doc: /* If non-nil, debug messages of D-Bus bindings are raised. */); +#ifdef DBUS_DEBUG + Vdbus_debug = Qt; +#else + Vdbus_debug = Qnil; +#endif + + Fprovide (intern ("dbusbind"), Qnil); + +} + +#endif /* HAVE_DBUS */ |