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Diffstat (limited to 'src/dbusbind.c')
| -rw-r--r-- | src/dbusbind.c | 1574 |
1 files changed, 1574 insertions, 0 deletions
diff --git a/src/dbusbind.c b/src/dbusbind.c new file mode 100644 index 00000000000..136cea9adb4 --- /dev/null +++ b/src/dbusbind.c @@ -0,0 +1,1574 @@ +/* Elisp bindings for D-Bus. + Copyright (C) 2007, 2008 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 <stdio.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_method_return; +Lisp_Object Qdbus_send_signal; +Lisp_Object Qdbus_register_signal; +Lisp_Object Qdbus_register_method; +Lisp_Object Qdbus_unregister_object; + +/* D-Bus error symbol. */ +Lisp_Object Qdbus_error; + +/* Lisp symbols of the system and session buses. */ +Lisp_Object QCdbus_system_bus, QCdbus_session_bus; + +/* Lisp symbols of D-Bus types. */ +Lisp_Object QCdbus_type_byte, QCdbus_type_boolean; +Lisp_Object QCdbus_type_int16, QCdbus_type_uint16; +Lisp_Object QCdbus_type_int32, QCdbus_type_uint32; +Lisp_Object QCdbus_type_int64, QCdbus_type_uint64; +Lisp_Object QCdbus_type_double, QCdbus_type_string; +Lisp_Object QCdbus_type_object_path, QCdbus_type_signature; +Lisp_Object QCdbus_type_array, QCdbus_type_variant; +Lisp_Object QCdbus_type_struct, QCdbus_type_dict_entry; + +/* Hash table which keeps function definitions. */ +Lisp_Object Vdbus_registered_functions_table; + +/* 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_". */ + +/* Raise a Lisp error from a D-Bus ERROR. */ +#define XD_ERROR(error) \ + do { \ + 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)); \ + } while (0) + +/* Macros for debugging. In order to enable them, build with + "make MYCPPFLAGS='-DDBUS_DEBUG -Wall'". */ +#ifdef DBUS_DEBUG +#define XD_DEBUG_MESSAGE(...) \ + do { \ + char s[1024]; \ + sprintf (s, __VA_ARGS__); \ + printf ("%s: %s\n", __func__, s); \ + message ("%s: %s", __func__, s); \ + } while (0) +#define XD_DEBUG_VALID_LISP_OBJECT_P(object) \ + do { \ + if (!valid_lisp_object_p (object)) \ + { \ + XD_DEBUG_MESSAGE ("%d Assertion failure", __LINE__); \ + xsignal1 (Qdbus_error, build_string ("Assertion failure")); \ + } \ + } while (0) + +#else /* !DBUS_DEBUG */ +#define XD_DEBUG_MESSAGE(...) \ + do { \ + if (!NILP (Vdbus_debug)) \ + { \ + char s[1024]; \ + sprintf (s, __VA_ARGS__); \ + message ("%s: %s", __func__, s); \ + } \ + } while (0) +#define XD_DEBUG_VALID_LISP_OBJECT_P(object) +#endif + +/* Check whether TYPE is a basic DBusType. */ +#define XD_BASIC_DBUS_TYPE(type) \ + ((type == DBUS_TYPE_BYTE) \ + || (type == DBUS_TYPE_BOOLEAN) \ + || (type == DBUS_TYPE_INT16) \ + || (type == DBUS_TYPE_UINT16) \ + || (type == DBUS_TYPE_INT32) \ + || (type == DBUS_TYPE_UINT32) \ + || (type == DBUS_TYPE_INT64) \ + || (type == DBUS_TYPE_UINT64) \ + || (type == DBUS_TYPE_DOUBLE) \ + || (type == DBUS_TYPE_STRING) \ + || (type == DBUS_TYPE_OBJECT_PATH) \ + || (type == DBUS_TYPE_SIGNATURE)) + +/* Determine the DBusType of a given Lisp symbol. OBJECT must be one + of the predefined D-Bus type symbols. */ +#define XD_SYMBOL_TO_DBUS_TYPE(object) \ + ((EQ (object, QCdbus_type_byte)) ? DBUS_TYPE_BYTE \ + : (EQ (object, QCdbus_type_boolean)) ? DBUS_TYPE_BOOLEAN \ + : (EQ (object, QCdbus_type_int16)) ? DBUS_TYPE_INT16 \ + : (EQ (object, QCdbus_type_uint16)) ? DBUS_TYPE_UINT16 \ + : (EQ (object, QCdbus_type_int32)) ? DBUS_TYPE_INT32 \ + : (EQ (object, QCdbus_type_uint32)) ? DBUS_TYPE_UINT32 \ + : (EQ (object, QCdbus_type_int64)) ? DBUS_TYPE_INT64 \ + : (EQ (object, QCdbus_type_uint64)) ? DBUS_TYPE_UINT64 \ + : (EQ (object, QCdbus_type_double)) ? DBUS_TYPE_DOUBLE \ + : (EQ (object, QCdbus_type_string)) ? DBUS_TYPE_STRING \ + : (EQ (object, QCdbus_type_object_path)) ? DBUS_TYPE_OBJECT_PATH \ + : (EQ (object, QCdbus_type_signature)) ? DBUS_TYPE_SIGNATURE \ + : (EQ (object, QCdbus_type_array)) ? DBUS_TYPE_ARRAY \ + : (EQ (object, QCdbus_type_variant)) ? DBUS_TYPE_VARIANT \ + : (EQ (object, QCdbus_type_struct)) ? DBUS_TYPE_STRUCT \ + : (EQ (object, QCdbus_type_dict_entry)) ? DBUS_TYPE_DICT_ENTRY \ + : DBUS_TYPE_INVALID) + +/* Check whether a Lisp symbol is a predefined D-Bus type symbol. */ +#define XD_DBUS_TYPE_P(object) \ + (SYMBOLP (object) && ((XD_SYMBOL_TO_DBUS_TYPE (object) != DBUS_TYPE_INVALID))) + +/* 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_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 \ + : (XD_DBUS_TYPE_P (object)) ? XD_SYMBOL_TO_DBUS_TYPE (object) \ + : (CONSP (object)) ? ((XD_DBUS_TYPE_P (CAR_SAFE (object))) \ + ? XD_SYMBOL_TO_DBUS_TYPE (CAR_SAFE (object)) \ + : DBUS_TYPE_ARRAY) \ + : DBUS_TYPE_INVALID) + +/* Return a list pointer which does not have a Lisp symbol as car. */ +#define XD_NEXT_VALUE(object) \ + ((XD_DBUS_TYPE_P (CAR_SAFE (object))) ? CDR_SAFE (object) : object) + +/* Compute SIGNATURE of OBJECT. It must have a form that it can be + used in dbus_message_iter_open_container. DTYPE is the DBusType + the object is related to. It is passed as argument, because it + cannot be detected in basic type objects, when they are preceded by + a type symbol. PARENT_TYPE is the DBusType of a container this + signature is embedded, or DBUS_TYPE_INVALID. It is needed for the + check that DBUS_TYPE_DICT_ENTRY occurs only as array element. */ +void +xd_signature(signature, dtype, parent_type, object) + char *signature; + unsigned int dtype, parent_type; + Lisp_Object object; +{ + unsigned int subtype; + Lisp_Object elt; + char x[DBUS_MAXIMUM_SIGNATURE_LENGTH]; + + elt = object; + + switch (dtype) + { + case DBUS_TYPE_BYTE: + case DBUS_TYPE_UINT16: + case DBUS_TYPE_UINT32: + case DBUS_TYPE_UINT64: + CHECK_NATNUM (object); + sprintf (signature, "%c", dtype); + break; + + case DBUS_TYPE_BOOLEAN: + if (!EQ (object, Qt) && !EQ (object, Qnil)) + wrong_type_argument (intern ("booleanp"), object); + sprintf (signature, "%c", dtype); + break; + + case DBUS_TYPE_INT16: + case DBUS_TYPE_INT32: + case DBUS_TYPE_INT64: + CHECK_NUMBER (object); + sprintf (signature, "%c", dtype); + break; + + case DBUS_TYPE_DOUBLE: + CHECK_FLOAT (object); + sprintf (signature, "%c", dtype); + break; + + case DBUS_TYPE_STRING: + case DBUS_TYPE_OBJECT_PATH: + case DBUS_TYPE_SIGNATURE: + CHECK_STRING (object); + sprintf (signature, "%c", dtype); + break; + + case DBUS_TYPE_ARRAY: + /* Check that all list elements have the same D-Bus type. For + complex element types, we just check the container type, not + the whole element's signature. */ + CHECK_CONS (object); + + /* Type symbol is optional. */ + if (EQ (QCdbus_type_array, CAR_SAFE (elt))) + elt = XD_NEXT_VALUE (elt); + + /* If the array is empty, DBUS_TYPE_STRING is the default + element type. */ + if (NILP (elt)) + { + subtype = DBUS_TYPE_STRING; + strcpy (x, DBUS_TYPE_STRING_AS_STRING); + } + else + { + subtype = XD_OBJECT_TO_DBUS_TYPE (CAR_SAFE (elt)); + xd_signature (x, subtype, dtype, CAR_SAFE (XD_NEXT_VALUE (elt))); + } + + /* If the element type is DBUS_TYPE_SIGNATURE, and this is the + only element, the value of this element is used as he array's + element signature. */ + if ((subtype == DBUS_TYPE_SIGNATURE) + && STRINGP (CAR_SAFE (XD_NEXT_VALUE (elt))) + && NILP (CDR_SAFE (XD_NEXT_VALUE (elt)))) + strcpy (x, SDATA (CAR_SAFE (XD_NEXT_VALUE (elt)))); + + while (!NILP (elt)) + { + if (subtype != XD_OBJECT_TO_DBUS_TYPE (CAR_SAFE (elt))) + wrong_type_argument (intern ("D-Bus"), CAR_SAFE (elt)); + elt = CDR_SAFE (XD_NEXT_VALUE (elt)); + } + + sprintf (signature, "%c%s", dtype, x); + break; + + case DBUS_TYPE_VARIANT: + /* Check that there is exactly one list element. */ + CHECK_CONS (object); + + elt = XD_NEXT_VALUE (elt); + subtype = XD_OBJECT_TO_DBUS_TYPE (CAR_SAFE (elt)); + xd_signature (x, subtype, dtype, CAR_SAFE (XD_NEXT_VALUE (elt))); + + if (!NILP (CDR_SAFE (XD_NEXT_VALUE (elt)))) + wrong_type_argument (intern ("D-Bus"), + CAR_SAFE (CDR_SAFE (XD_NEXT_VALUE (elt)))); + + sprintf (signature, "%c", dtype); + break; + + case DBUS_TYPE_STRUCT: + /* A struct list might contain any number of elements with + different types. No further check needed. */ + CHECK_CONS (object); + + elt = XD_NEXT_VALUE (elt); + + /* Compose the signature from the elements. It is enclosed by + parentheses. */ + sprintf (signature, "%c", DBUS_STRUCT_BEGIN_CHAR ); + while (!NILP (elt)) + { + subtype = XD_OBJECT_TO_DBUS_TYPE (CAR_SAFE (elt)); + xd_signature (x, subtype, dtype, CAR_SAFE (XD_NEXT_VALUE (elt))); + strcat (signature, x); + elt = CDR_SAFE (XD_NEXT_VALUE (elt)); + } + sprintf (signature, "%s%c", signature, DBUS_STRUCT_END_CHAR); + break; + + case DBUS_TYPE_DICT_ENTRY: + /* Check that there are exactly two list elements, and the first + one is of basic type. The dictionary entry itself must be an + element of an array. */ + CHECK_CONS (object); + + /* Check the parent object type. */ + if (parent_type != DBUS_TYPE_ARRAY) + wrong_type_argument (intern ("D-Bus"), object); + + /* Compose the signature from the elements. It is enclosed by + curly braces. */ + sprintf (signature, "%c", DBUS_DICT_ENTRY_BEGIN_CHAR); + + /* First element. */ + elt = XD_NEXT_VALUE (elt); + subtype = XD_OBJECT_TO_DBUS_TYPE (CAR_SAFE (elt)); + xd_signature (x, subtype, dtype, CAR_SAFE (XD_NEXT_VALUE (elt))); + strcat (signature, x); + + if (!XD_BASIC_DBUS_TYPE (subtype)) + wrong_type_argument (intern ("D-Bus"), CAR_SAFE (XD_NEXT_VALUE (elt))); + + /* Second element. */ + elt = CDR_SAFE (XD_NEXT_VALUE (elt)); + subtype = XD_OBJECT_TO_DBUS_TYPE (CAR_SAFE (elt)); + xd_signature (x, subtype, dtype, CAR_SAFE (XD_NEXT_VALUE (elt))); + strcat (signature, x); + + if (!NILP (CDR_SAFE (XD_NEXT_VALUE (elt)))) + wrong_type_argument (intern ("D-Bus"), + CAR_SAFE (CDR_SAFE (XD_NEXT_VALUE (elt)))); + + /* Closing signature. */ + sprintf (signature, "%s%c", signature, DBUS_DICT_ENTRY_END_CHAR); + break; + + default: + wrong_type_argument (intern ("D-Bus"), object); + } + + XD_DEBUG_MESSAGE ("%s", signature); +} + +/* Append C value, extracted from Lisp OBJECT, to iteration ITER. + DTYPE must be a valid DBusType. 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. */ +void +xd_append_arg (dtype, object, iter) + unsigned int dtype; + Lisp_Object object; + DBusMessageIter *iter; +{ + char signature[DBUS_MAXIMUM_SIGNATURE_LENGTH]; + DBusMessageIter subiter; + + if (XD_BASIC_DBUS_TYPE (dtype)) + switch (dtype) + { + case DBUS_TYPE_BYTE: + { + unsigned char val = XUINT (object) & 0xFF; + XD_DEBUG_MESSAGE ("%c %d", dtype, val); + if (!dbus_message_iter_append_basic (iter, dtype, &val)) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), object); + return; + } + + case DBUS_TYPE_BOOLEAN: + { + dbus_bool_t val = (NILP (object)) ? FALSE : TRUE; + XD_DEBUG_MESSAGE ("%c %s", dtype, (val == FALSE) ? "false" : "true"); + if (!dbus_message_iter_append_basic (iter, dtype, &val)) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), object); + return; + } + + case DBUS_TYPE_INT16: + { + dbus_int16_t val = XINT (object); + XD_DEBUG_MESSAGE ("%c %d", dtype, (int) val); + if (!dbus_message_iter_append_basic (iter, dtype, &val)) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), object); + return; + } + + case DBUS_TYPE_UINT16: + { + dbus_uint16_t val = XUINT (object); + XD_DEBUG_MESSAGE ("%c %u", dtype, (unsigned int) val); + if (!dbus_message_iter_append_basic (iter, dtype, &val)) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), object); + return; + } + + case DBUS_TYPE_INT32: + { + dbus_int32_t val = XINT (object); + XD_DEBUG_MESSAGE ("%c %d", dtype, val); + if (!dbus_message_iter_append_basic (iter, dtype, &val)) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), object); + return; + } + + case DBUS_TYPE_UINT32: + { + dbus_uint32_t val = XUINT (object); + XD_DEBUG_MESSAGE ("%c %u", dtype, val); + if (!dbus_message_iter_append_basic (iter, dtype, &val)) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), object); + return; + } + + case DBUS_TYPE_INT64: + { + dbus_int64_t val = XINT (object); + XD_DEBUG_MESSAGE ("%c %d", dtype, (int) val); + if (!dbus_message_iter_append_basic (iter, dtype, &val)) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), object); + return; + } + + case DBUS_TYPE_UINT64: + { + dbus_uint64_t val = XUINT (object); + XD_DEBUG_MESSAGE ("%c %u", dtype, (unsigned int) val); + if (!dbus_message_iter_append_basic (iter, dtype, &val)) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), object); + return; + } + + case DBUS_TYPE_DOUBLE: + XD_DEBUG_MESSAGE ("%c %f", dtype, XFLOAT_DATA (object)); + if (!dbus_message_iter_append_basic (iter, dtype, + &XFLOAT_DATA (object))) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), object); + return; + + case DBUS_TYPE_STRING: + case DBUS_TYPE_OBJECT_PATH: + case DBUS_TYPE_SIGNATURE: + { + char *val = SDATA (object); + XD_DEBUG_MESSAGE ("%c %s", dtype, val); + if (!dbus_message_iter_append_basic (iter, dtype, &val)) + xsignal2 (Qdbus_error, + build_string ("Unable to append argument"), object); + return; + } + } + + else /* Compound types. */ + { + + /* All compound types except array have a type symbol. For + array, it is optional. Skip it. */ + if (!XD_BASIC_DBUS_TYPE (XD_OBJECT_TO_DBUS_TYPE (CAR_SAFE (object)))) + object = XD_NEXT_VALUE (object); + + /* Open new subiteration. */ + switch (dtype) + { + case DBUS_TYPE_ARRAY: + /* An array has only elements of the same type. So it is + sufficient to check the first element's signature + only. */ + + if (NILP (object)) + /* If the array is empty, DBUS_TYPE_STRING is the default + element type. */ + strcpy (signature, DBUS_TYPE_STRING_AS_STRING); + + else + /* If the element type is DBUS_TYPE_SIGNATURE, and this is + the only element, the value of this element is used as + the array's element signature. */ + if ((XD_OBJECT_TO_DBUS_TYPE (CAR_SAFE (object)) + == DBUS_TYPE_SIGNATURE) + && STRINGP (CAR_SAFE (XD_NEXT_VALUE (object))) + && NILP (CDR_SAFE (XD_NEXT_VALUE (object)))) + { + strcpy (signature, SDATA (CAR_SAFE (XD_NEXT_VALUE (object)))); + object = CDR_SAFE (XD_NEXT_VALUE (object)); + } + + else + xd_signature (signature, + XD_OBJECT_TO_DBUS_TYPE (CAR_SAFE (object)), + dtype, CAR_SAFE (XD_NEXT_VALUE (object))); + + XD_DEBUG_MESSAGE ("%c %s %s", dtype, signature, + SDATA (format2 ("%s", object, Qnil))); + if (!dbus_message_iter_open_container (iter, dtype, + signature, &subiter)) + xsignal3 (Qdbus_error, + build_string ("Cannot open container"), + make_number (dtype), build_string (signature)); + break; + + case DBUS_TYPE_VARIANT: + /* A variant has just one element. */ + xd_signature (signature, XD_OBJECT_TO_DBUS_TYPE (CAR_SAFE (object)), + dtype, CAR_SAFE (XD_NEXT_VALUE (object))); + + XD_DEBUG_MESSAGE ("%c %s %s", dtype, signature, + SDATA (format2 ("%s", object, Qnil))); + if (!dbus_message_iter_open_container (iter, dtype, + signature, &subiter)) + xsignal3 (Qdbus_error, + build_string ("Cannot open container"), + make_number (dtype), build_string (signature)); + break; + + case DBUS_TYPE_STRUCT: + case DBUS_TYPE_DICT_ENTRY: + /* These containers do not require a signature. */ + XD_DEBUG_MESSAGE ("%c %s", dtype, + SDATA (format2 ("%s", object, Qnil))); + if (!dbus_message_iter_open_container (iter, dtype, NULL, &subiter)) + xsignal2 (Qdbus_error, + build_string ("Cannot open container"), + make_number (dtype)); + break; + } + + /* Loop over list elements. */ + while (!NILP (object)) + { + dtype = XD_OBJECT_TO_DBUS_TYPE (CAR_SAFE (object)); + object = XD_NEXT_VALUE (object); + + xd_append_arg (dtype, CAR_SAFE (object), &subiter); + + object = CDR_SAFE (object); + } + + /* Close the subiteration. */ + if (!dbus_message_iter_close_container (iter, &subiter)) + xsignal2 (Qdbus_error, + build_string ("Cannot close container"), + make_number (dtype)); + } +} + +/* 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 + result always in a Lisp list. */ +Lisp_Object +xd_retrieve_arg (dtype, iter) + unsigned int dtype; + DBusMessageIter *iter; +{ + + switch (dtype) + { + case DBUS_TYPE_BYTE: + { + unsigned int val; + dbus_message_iter_get_basic (iter, &val); + val = val & 0xFF; + XD_DEBUG_MESSAGE ("%c %d", dtype, val); + return make_number (val); + } + + case DBUS_TYPE_BOOLEAN: + { + dbus_bool_t val; + dbus_message_iter_get_basic (iter, &val); + XD_DEBUG_MESSAGE ("%c %s", dtype, (val == FALSE) ? "false" : "true"); + return (val == FALSE) ? Qnil : Qt; + } + + case DBUS_TYPE_INT16: + case DBUS_TYPE_UINT16: + { + dbus_uint16_t val; + dbus_message_iter_get_basic (iter, &val); + XD_DEBUG_MESSAGE ("%c %d", dtype, val); + return make_number (val); + } + + case DBUS_TYPE_INT32: + case DBUS_TYPE_UINT32: + { + dbus_uint32_t val; + dbus_message_iter_get_basic (iter, &val); + XD_DEBUG_MESSAGE ("%c %d", dtype, val); + return make_fixnum_or_float (val); + } + + case DBUS_TYPE_INT64: + case DBUS_TYPE_UINT64: + { + dbus_uint64_t val; + dbus_message_iter_get_basic (iter, &val); + XD_DEBUG_MESSAGE ("%c %d", dtype, (int) val); + return make_fixnum_or_float (val); + } + + case DBUS_TYPE_DOUBLE: + { + double val; + dbus_message_iter_get_basic (iter, &val); + XD_DEBUG_MESSAGE ("%c %f", dtype, val); + return make_float (val); + } + + case DBUS_TYPE_STRING: + case DBUS_TYPE_OBJECT_PATH: + case DBUS_TYPE_SIGNATURE: + { + char *val; + dbus_message_iter_get_basic (iter, &val); + XD_DEBUG_MESSAGE ("%c %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); + } + XD_DEBUG_MESSAGE ("%c %s", dtype, SDATA (format2 ("%s", result, Qnil))); + RETURN_UNGCPRO (Fnreverse (result)); + } + + default: + XD_DEBUG_MESSAGE ("DBusType '%c' 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, QCdbus_system_bus)) || (EQ (bus, QCdbus_session_bus)))) + xsignal2 (Qdbus_error, build_string ("Wrong bus name"), bus); + + /* Open a connection to the bus. */ + dbus_error_init (&derror); + + if (EQ (bus, QCdbus_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. */) + (bus) + Lisp_Object bus; +{ + DBusConnection *connection; + char name[DBUS_MAXIMUM_NAME_LENGTH]; + + /* 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 + list => DBUS_TYPE_ARRAY + +All arguments can be preceded by a type symbol. For details about +type symbols, see Info node `(dbus)Type Conversion'. + +`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. It follows the mapping rules: + + DBUS_TYPE_BOOLEAN => t or nil + DBUS_TYPE_BYTE => number + DBUS_TYPE_UINT16 => number + DBUS_TYPE_INT16 => integer + DBUS_TYPE_UINT32 => number or float + DBUS_TYPE_INT32 => integer or float + DBUS_TYPE_UINT64 => number or float + DBUS_TYPE_INT64 => integer or float + DBUS_TYPE_DOUBLE => float + DBUS_TYPE_STRING => string + DBUS_TYPE_OBJECT_PATH => string + DBUS_TYPE_SIGNATURE => string + DBUS_TYPE_ARRAY => list + DBUS_TYPE_VARIANT => list + DBUS_TYPE_STRUCT => list + DBUS_TYPE_DICT_ENTRY => list + +Example: + +\(dbus-call-method + :session "org.gnome.seahorse" "/org/gnome/seahorse/keys/openpgp" + "org.gnome.seahorse.Keys" "GetKeyField" + "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 "org.freedesktop.Hal" "/org/freedesktop/Hal/devices/computer" + "org.freedesktop.Hal.Device" "GetPropertyString" + "system.kernel.machine") + + => "i686" + +usage: (dbus-call-method BUS SERVICE PATH INTERFACE METHOD &rest ARGS) */) + (nargs, args) + int nargs; + register Lisp_Object *args; +{ + Lisp_Object bus, service, path, interface, method; + Lisp_Object result; + struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; + DBusConnection *connection; + DBusMessage *dmessage; + DBusMessage *reply; + DBusMessageIter iter; + DBusError derror; + unsigned int dtype; + int i; + char signature[DBUS_MAXIMUM_SIGNATURE_LENGTH]; + + /* Check parameters. */ + bus = args[0]; + service = args[1]; + path = args[2]; + interface = args[3]; + method = args[4]; + + CHECK_SYMBOL (bus); + CHECK_STRING (service); + CHECK_STRING (path); + CHECK_STRING (interface); + CHECK_STRING (method); + GCPRO5 (bus, service, path, interface, method); + + XD_DEBUG_MESSAGE ("%s %s %s %s", + SDATA (service), + SDATA (path), + SDATA (interface), + SDATA (method)); + + /* 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; + + /* Initialize parameter list of message. */ + dbus_message_iter_init_append (dmessage, &iter); + + /* 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_OBJECT_TO_DBUS_TYPE (args[i]); + if (XD_DBUS_TYPE_P (args[i])) + ++i; + + /* Check for valid signature. We use DBUS_TYPE_INVALID as + indication that there is no parent type. */ + xd_signature (signature, dtype, DBUS_TYPE_INVALID, args[i]); + + xd_append_arg (dtype, args[i], &iter); + } + + /* 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)) + { + /* 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); + } + } + else + { + /* No arguments: just return nil. */ + } + + /* 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 (CAR_SAFE (result)); + else + RETURN_UNGCPRO (Fnreverse (result)); +} + +DEFUN ("dbus-method-return", Fdbus_method_return, Sdbus_method_return, + 3, MANY, 0, + doc: /* Return to method SERIAL on the D-Bus BUS. +This is an internal function, it shall not be used outside dbus.el. + +usage: (dbus-method-return BUS SERIAL SERVICE &rest ARGS) */) + (nargs, args) + int nargs; + register Lisp_Object *args; +{ + Lisp_Object bus, serial, service; + struct gcpro gcpro1, gcpro2, gcpro3; + DBusConnection *connection; + DBusMessage *dmessage; + DBusMessageIter iter; + unsigned int dtype; + int i; + char signature[DBUS_MAXIMUM_SIGNATURE_LENGTH]; + + /* Check parameters. */ + bus = args[0]; + serial = args[1]; + service = args[2]; + + CHECK_SYMBOL (bus); + CHECK_NUMBER (serial); + CHECK_STRING (service); + GCPRO3 (bus, serial, service); + + XD_DEBUG_MESSAGE ("%d %s ", XUINT (serial), SDATA (service)); + + /* Open a connection to the bus. */ + connection = xd_initialize (bus); + + /* Create the message. */ + dmessage = dbus_message_new (DBUS_MESSAGE_TYPE_METHOD_RETURN); + if ((dmessage == NULL) + || (!dbus_message_set_reply_serial (dmessage, XUINT (serial))) + || (!dbus_message_set_destination (dmessage, SDATA (service)))) + { + UNGCPRO; + xsignal1 (Qdbus_error, + build_string ("Unable to create a return message")); + } + + UNGCPRO; + + /* Initialize parameter list of message. */ + dbus_message_iter_init_append (dmessage, &iter); + + /* Append parameters to the message. */ + for (i = 3; i < nargs; ++i) + { + + XD_DEBUG_VALID_LISP_OBJECT_P (args[i]); + XD_DEBUG_MESSAGE ("Parameter%d %s", + i-2, SDATA (format2 ("%s", args[i], Qnil))); + + dtype = XD_OBJECT_TO_DBUS_TYPE (args[i]); + if (XD_DBUS_TYPE_P (args[i])) + ++i; + + /* Check for valid signature. We use DBUS_TYPE_INVALID as + indication that there is no parent type. */ + xd_signature (signature, dtype, DBUS_TYPE_INVALID, args[i]); + + xd_append_arg (dtype, args[i], &iter); + } + + /* 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 ("Message sent"); + + /* Cleanup. */ + dbus_message_unref (dmessage); + + /* Return. */ + return Qt; +} + +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 + list => DBUS_TYPE_ARRAY + +All arguments can be preceded by a type symbol. For details about +type symbols, see Info node `(dbus)Type Conversion'. + +Example: + +\(dbus-send-signal + :session "org.gnu.Emacs" "/org/gnu/Emacs" + "org.gnu.Emacs.FileManager" "FileModified" "/home/albinus/.emacs") + +usage: (dbus-send-signal BUS SERVICE PATH INTERFACE SIGNAL &rest ARGS) */) + (nargs, args) + int nargs; + register Lisp_Object *args; +{ + Lisp_Object bus, service, path, interface, signal; + struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; + DBusConnection *connection; + DBusMessage *dmessage; + DBusMessageIter iter; + unsigned int dtype; + int i; + char signature[DBUS_MAXIMUM_SIGNATURE_LENGTH]; + + /* Check parameters. */ + bus = args[0]; + service = args[1]; + path = args[2]; + interface = args[3]; + signal = args[4]; + + CHECK_SYMBOL (bus); + CHECK_STRING (service); + CHECK_STRING (path); + CHECK_STRING (interface); + CHECK_STRING (signal); + GCPRO5 (bus, service, path, interface, signal); + + XD_DEBUG_MESSAGE ("%s %s %s %s", + SDATA (service), + SDATA (path), + SDATA (interface), + SDATA (signal)); + + /* 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; + + /* Initialize parameter list of message. */ + dbus_message_iter_init_append (dmessage, &iter); + + /* 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_OBJECT_TO_DBUS_TYPE (args[i]); + if (XD_DBUS_TYPE_P (args[i])) + ++i; + + /* Check for valid signature. We use DBUS_TYPE_INVALID as + indication that there is no parent type. */ + xd_signature (signature, dtype, DBUS_TYPE_INVALID, args[i]); + + xd_append_arg (dtype, args[i], &iter); + } + + /* 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. */ +Lisp_Object +xd_read_message (bus) + Lisp_Object bus; +{ + Lisp_Object args, key, value; + struct gcpro gcpro1; + struct input_event event; + DBusConnection *connection; + DBusMessage *dmessage; + DBusMessageIter iter; + unsigned int dtype; + int mtype; + char uname[DBUS_MAXIMUM_NAME_LENGTH]; + char path[DBUS_MAXIMUM_MATCH_RULE_LENGTH]; /* Unlimited in D-Bus spec. */ + char interface[DBUS_MAXIMUM_NAME_LENGTH]; + char member[DBUS_MAXIMUM_NAME_LENGTH]; + + /* 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 Qnil; + + /* Collect the parameters. */ + args = Qnil; + GCPRO1 (args); + + /* Loop over the resulting parameters. Construct a list. */ + if (dbus_message_iter_init (dmessage, &iter)) + { + while ((dtype = dbus_message_iter_get_arg_type (&iter)) + != DBUS_TYPE_INVALID) + { + args = Fcons (xd_retrieve_arg (dtype, &iter), args); + dbus_message_iter_next (&iter); + } + /* The arguments are stored in reverse order. Reorder them. */ + args = Fnreverse (args); + } + + /* Read message type, unique name, object path, interface and member + from the message. */ + mtype = dbus_message_get_type (dmessage); + strcpy (uname, dbus_message_get_sender (dmessage)); + strcpy (path, dbus_message_get_path (dmessage)); + strcpy (interface, dbus_message_get_interface (dmessage)); + strcpy (member, dbus_message_get_member (dmessage)); + + XD_DEBUG_MESSAGE ("Event received: %d %s %s %s %s %s", + mtype, uname, path, interface, member, + SDATA (format2 ("%s", args, Qnil))); + + /* Search for a registered function of the message. */ + key = list3 (bus, build_string (interface), build_string (member)); + value = Fgethash (key, Vdbus_registered_functions_table, Qnil); + + /* Loop over the registered functions. Construct an event. */ + while (!NILP (value)) + { + key = CAR_SAFE (value); + /* key has the structure (UNAME SERVICE PATH HANDLER). */ + if (((uname == NULL) + || (NILP (CAR_SAFE (key))) + || (strcmp (uname, SDATA (CAR_SAFE (key))) == 0)) + && ((path == NULL) + || (NILP (CAR_SAFE (CDR_SAFE (CDR_SAFE (key))))) + || (strcmp (path, SDATA (CAR_SAFE (CDR_SAFE (CDR_SAFE (key))))) + == 0)) + && (!NILP (CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (key))))))) + { + EVENT_INIT (event); + event.kind = DBUS_EVENT; + event.frame_or_window = Qnil; + event.arg = Fcons (CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (key)))), + args); + + /* Add uname, path, interface and member to the event. */ + event.arg = Fcons ((member == NULL ? Qnil : build_string (member)), + event.arg); + event.arg = Fcons ((interface == NULL + ? Qnil : build_string (interface)), + event.arg); + event.arg = Fcons ((path == NULL ? Qnil : build_string (path)), + event.arg); + event.arg = Fcons ((uname == NULL ? Qnil : build_string (uname)), + event.arg); + + /* Add the message serial if needed, or nil. */ + event.arg = Fcons ((mtype == DBUS_MESSAGE_TYPE_METHOD_CALL + ? make_number (dbus_message_get_serial (dmessage)) + : Qnil), + event.arg); + + /* Add the bus symbol to the event. */ + event.arg = Fcons (bus, event.arg); + + /* Store it into the input event queue. */ + kbd_buffer_store_event (&event); + } + value = CDR_SAFE (value); + } + + /* Cleanup. */ + dbus_message_unref (dmessage); + RETURN_UNGCPRO (Qnil); +} + +/* Read queued incoming messages from the system and session buses. */ +void +xd_read_queued_messages () +{ + + /* Vdbus_registered_functions_table will be initialized as hash + table in dbus.el. When this package isn't loaded yet, it doesn't + make sense to handle D-Bus messages. Furthermore, we ignore all + Lisp errors during the call. */ + if (HASH_TABLE_P (Vdbus_registered_functions_table)) + { + internal_condition_case_1 (xd_read_message, QCdbus_system_bus, + Qerror, Fidentity); + internal_condition_case_1 (xd_read_message, QCdbus_session_bus, + Qerror, Fidentity); + } +} + +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 used by the sending D-Bus object. +It can be either a known name or the unique name of the D-Bus object +sending the signal. When SERVICE is nil, related signals from all +D-Bus objects shall be accepted. + +PATH is the D-Bus object path SERVICE is registered. It can also be +nil if the path name of incoming signals shall not be checked. + +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. INTERFACE, +SIGNAL and HANDLER must not be nil. Example: + +\(defun my-signal-handler (device) + (message "Device %s added" device)) + +\(dbus-register-signal + :system "org.freedesktop.Hal" "/org/freedesktop/Hal/Manager" + "org.freedesktop.Hal.Manager" "DeviceAdded" 'my-signal-handler) + + => ((:system "org.freedesktop.Hal.Manager" "DeviceAdded") + ("org.freedesktop.Hal" "/org/freedesktop/Hal/Manager" my-signal-handler)) + +`dbus-register-signal' returns an object, which can be used in +`dbus-unregister-object' for removing the registration. */) + (bus, service, path, interface, signal, handler) + Lisp_Object bus, service, path, interface, signal, handler; +{ + Lisp_Object uname, key, key1, value; + DBusConnection *connection; + char rule[DBUS_MAXIMUM_MATCH_RULE_LENGTH]; + DBusError derror; + + /* Check parameters. */ + CHECK_SYMBOL (bus); + if (!NILP (service)) CHECK_STRING (service); + if (!NILP (path)) CHECK_STRING (path); + CHECK_STRING (interface); + CHECK_STRING (signal); + if (!FUNCTIONP (handler)) + wrong_type_argument (intern ("functionp"), handler); + + /* Retrieve unique name of service. If service is a known name, we + will register for the corresponding unique name, if any. Signals + are sent always with the unique name as sender. Note: the unique + name of "org.freedesktop.DBus" is that string itself. */ + if ((STRINGP (service)) + && (SBYTES (service) > 0) + && (strcmp (SDATA (service), DBUS_SERVICE_DBUS) != 0) + && (strncmp (SDATA (service), ":", 1) != 0)) + { + uname = call2 (intern ("dbus-get-name-owner"), bus, service); + /* When there is no unique name, we mark it with an empty + string. */ + if (NILP (uname)) + uname = build_string (""); + } + else + uname = service; + + /* Create a matching rule if the unique name exists (when no + wildcard). */ + if (NILP (uname) || (SBYTES (uname) > 0)) + { + /* Open a connection to the bus. */ + connection = xd_initialize (bus); + + /* Create a rule to receive related signals. */ + sprintf (rule, + "type='signal',interface='%s',member='%s'", + SDATA (interface), + SDATA (signal)); + + /* Add unique name and path to the rule if they are non-nil. */ + if (!NILP (uname)) + sprintf (rule, "%s,sender='%s'", rule, SDATA (uname)); + + if (!NILP (path)) + sprintf (rule, "%s,path='%s'", rule, SDATA (path)); + + /* Add the rule to the bus. */ + dbus_error_init (&derror); + 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 hash table entry. */ + key = list3 (bus, interface, signal); + key1 = list4 (uname, service, path, handler); + value = Fgethash (key, Vdbus_registered_functions_table, Qnil); + + if (NILP (Fmember (key1, value))) + Fputhash (key, Fcons (key1, value), Vdbus_registered_functions_table); + + /* Return object. */ + return list2 (key, list3 (service, path, handler)); +} + +DEFUN ("dbus-register-method", Fdbus_register_method, Sdbus_register_method, + 6, 6, 0, + doc: /* Register for method METHOD on the D-Bus BUS. + +BUS is either the symbol `:system' or the symbol `:session'. + +SERVICE is the D-Bus service name of the D-Bus object METHOD is +registered for. It must be a known name. + +PATH is the D-Bus object path SERVICE is registered. INTERFACE is the +interface offered by SERVICE. It must provide METHOD. HANDLER is a +Lisp function to be called when a method call is received. It must +accept the input arguments of METHOD. The return value of HANDLER is +used for composing the returning D-Bus message. */) + (bus, service, path, interface, method, handler) + Lisp_Object bus, service, path, interface, method, handler; +{ + Lisp_Object key, key1, value; + DBusConnection *connection; + int result; + DBusError derror; + + /* Check parameters. */ + CHECK_SYMBOL (bus); + CHECK_STRING (service); + CHECK_STRING (path); + CHECK_STRING (interface); + CHECK_STRING (method); + if (!FUNCTIONP (handler)) + wrong_type_argument (intern ("functionp"), handler); + /* TODO: We must check for a valid service name, otherwise there is + a segmentation fault. */ + + /* Open a connection to the bus. */ + connection = xd_initialize (bus); + + /* Request the known name from the bus. We can ignore the result, + it is set to -1 if there is an error - kind of redundancy. */ + dbus_error_init (&derror); + result = dbus_bus_request_name (connection, SDATA (service), 0, &derror); + if (dbus_error_is_set (&derror)) + XD_ERROR (derror); + + /* Create a hash table entry. */ + key = list3 (bus, interface, method); + key1 = list4 (Qnil, service, path, handler); + value = Fgethash (key, Vdbus_registered_functions_table, Qnil); + + /* We use nil for the unique name, because the method might be + called from everybody. */ + if (NILP (Fmember (key1, value))) + Fputhash (key, Fcons (key1, value), Vdbus_registered_functions_table); + + /* Return object. */ + return list2 (key, list3 (service, path, handler)); +} + +DEFUN ("dbus-unregister-object", Fdbus_unregister_object, + Sdbus_unregister_object, + 1, 1, 0, + doc: /* Unregister OBJECT from the D-Bus. +OBJECT must be the result of a preceding `dbus-register-signal' or +`dbus-register-method' call. It returns t if OBJECT has been +unregistered, nil otherwise. */) + (object) + Lisp_Object object; +{ + Lisp_Object value; + struct gcpro gcpro1; + + /* Check parameter. */ + if (!(CONSP (object) && (!NILP (CAR_SAFE (object))) + && CONSP (CDR_SAFE (object)))) + wrong_type_argument (intern ("D-Bus"), object); + + /* Find the corresponding entry in the hash table. */ + value = Fgethash (CAR_SAFE (object), Vdbus_registered_functions_table, Qnil); + + /* Loop over the registered functions. */ + while (!NILP (value)) + { + GCPRO1 (value); + + /* (car value) has the structure (UNAME SERVICE PATH HANDLER). + (cdr object) has the structure ((SERVICE PATH HANDLER) ...). */ + if (!NILP (Fequal (CDR_SAFE (CAR_SAFE (value)), + CAR_SAFE (CDR_SAFE (object))))) + { + /* Compute new hash value. */ + value = Fdelete (CAR_SAFE (value), + Fgethash (CAR_SAFE (object), + Vdbus_registered_functions_table, Qnil)); + if (NILP (value)) + Fremhash (CAR_SAFE (object), Vdbus_registered_functions_table); + else + Fputhash (CAR_SAFE (object), value, + Vdbus_registered_functions_table); + RETURN_UNGCPRO (Qt); + } + UNGCPRO; + value = CDR_SAFE (value); + } + + /* 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_method_return = intern ("dbus-method-return"); + staticpro (&Qdbus_method_return); + defsubr (&Sdbus_method_return); + + 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_register_method = intern ("dbus-register-method"); + staticpro (&Qdbus_register_method); + defsubr (&Sdbus_register_method); + + Qdbus_unregister_object = intern ("dbus-unregister-object"); + staticpro (&Qdbus_unregister_object); + defsubr (&Sdbus_unregister_object); + + 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")); + + QCdbus_system_bus = intern (":system"); + staticpro (&QCdbus_system_bus); + + QCdbus_session_bus = intern (":session"); + staticpro (&QCdbus_session_bus); + + QCdbus_type_byte = intern (":byte"); + staticpro (&QCdbus_type_byte); + + QCdbus_type_boolean = intern (":boolean"); + staticpro (&QCdbus_type_boolean); + + QCdbus_type_int16 = intern (":int16"); + staticpro (&QCdbus_type_int16); + + QCdbus_type_uint16 = intern (":uint16"); + staticpro (&QCdbus_type_uint16); + + QCdbus_type_int32 = intern (":int32"); + staticpro (&QCdbus_type_int32); + + QCdbus_type_uint32 = intern (":uint32"); + staticpro (&QCdbus_type_uint32); + + QCdbus_type_int64 = intern (":int64"); + staticpro (&QCdbus_type_int64); + + QCdbus_type_uint64 = intern (":uint64"); + staticpro (&QCdbus_type_uint64); + + QCdbus_type_double = intern (":double"); + staticpro (&QCdbus_type_double); + + QCdbus_type_string = intern (":string"); + staticpro (&QCdbus_type_string); + + QCdbus_type_object_path = intern (":object-path"); + staticpro (&QCdbus_type_object_path); + + QCdbus_type_signature = intern (":signature"); + staticpro (&QCdbus_type_signature); + + QCdbus_type_array = intern (":array"); + staticpro (&QCdbus_type_array); + + QCdbus_type_variant = intern (":variant"); + staticpro (&QCdbus_type_variant); + + QCdbus_type_struct = intern (":struct"); + staticpro (&QCdbus_type_struct); + + QCdbus_type_dict_entry = intern (":dict-entry"); + staticpro (&QCdbus_type_dict_entry); + + DEFVAR_LISP ("dbus-registered-functions-table", + &Vdbus_registered_functions_table, + doc: /* Hash table of registered functions for D-Bus. +The key in the hash table is the list (BUS INTERFACE MEMBER). BUS is +either the symbol `:system' or the symbol `:session'. INTERFACE is a +string which denotes a D-Bus interface, and MEMBER, also a string, is +either a method or a signal INTERFACE is offering. All arguments but +BUS must not be nil. + +The value in the hash table is a list of quadruple lists +\((UNAME SERVICE PATH HANDLER) (UNAME SERVICE PATH HANDLER) ...). +SERVICE is the service name as registered, UNAME is the corresponding +unique name. PATH is the object path of the sending object. All of +them can be nil, which means a wildcard then. HANDLER is the function +to be called when a D-Bus message, which matches the key criteria, +arrives. */); + /* We initialize Vdbus_registered_functions_table in dbus.el, + because we need to define a hash table function first. */ + Vdbus_registered_functions_table = Qnil; + + 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 */ + +/* arch-tag: 0e828477-b571-4fe4-b559-5c9211bc14b8 + (do not change this comment) */ |