From 29ddb38fea134c6132e4f2dd608e9da3871eaebe Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Wed, 9 Oct 2013 02:37:10 +0200 Subject: libsystemd-bus: add lightweight object vtable implementation for exposing objects on the bus This adds a lightweight scheme how to define interfaces in static fixed arrays which then can be easily registered on a bus connection. This makes it much easier to write bus services. This automatically handles implementation of the Properties, ObjectManager, and Introspection bus interfaces. --- src/libsystemd-bus/test-bus-introspect.c | 63 ++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 src/libsystemd-bus/test-bus-introspect.c (limited to 'src/libsystemd-bus/test-bus-introspect.c') diff --git a/src/libsystemd-bus/test-bus-introspect.c b/src/libsystemd-bus/test-bus-introspect.c new file mode 100644 index 0000000000..ea26cdd101 --- /dev/null +++ b/src/libsystemd-bus/test-bus-introspect.c @@ -0,0 +1,63 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2013 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +#include "util.h" +#include "log.h" +#include "bus-introspect.h" + +static int prop_get(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, sd_bus_error *error, void *userdata) { + return -EINVAL; +} + +static int prop_set(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, sd_bus_error *error, void *userdata) { + return -EINVAL; +} + +static const sd_bus_vtable vtable[] = { + SD_BUS_VTABLE_START(0), + SD_BUS_METHOD("Hello", "ssas", "a(uu)", 0, NULL), + SD_BUS_METHOD("DeprecatedHello", "", "", SD_BUS_VTABLE_DEPRECATED, NULL), + SD_BUS_METHOD("DeprecatedHelloNoReply", "", "", SD_BUS_VTABLE_DEPRECATED|SD_BUS_VTABLE_METHOD_NO_REPLY, NULL), + SD_BUS_SIGNAL("Wowza", "sss", 0), + SD_BUS_SIGNAL("DeprecatedWowza", "ut", SD_BUS_VTABLE_DEPRECATED), + SD_BUS_WRITABLE_PROPERTY("AProperty", "s", prop_get, prop_set, 0, 0), + SD_BUS_PROPERTY("AReadOnlyDeprecatedProperty", "(ut)", prop_get, 0, SD_BUS_VTABLE_DEPRECATED), + SD_BUS_PROPERTY("ChangingProperty", "t", prop_get, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("Invalidating", "t", prop_get, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY), + SD_BUS_VTABLE_END +}; + +int main(int argc, char *argv[]) { + struct introspect intro; + + log_set_max_level(LOG_DEBUG); + + assert_se(introspect_begin(&intro) >= 0); + + assert_se(introspect_write_interface(&intro, "org.foo", vtable) >= 0); + + fflush(intro.f); + fputs(intro.introspection, stdout); + + introspect_free(&intro); + + return 0; +} -- cgit v1.2.3-54-g00ecf