--- /dev/null
+/*-*- 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 <http://www.gnu.org/licenses/>.
+***/
+
+#include "util.h"
+#include "sd-bus-protocol.h"
+#include "bus-introspect.h"
+#include "bus-signature.h"
+#include "bus-internal.h"
+
+int introspect_begin(struct introspect *i) {
+ assert(i);
+
+ zero(*i);
+
+ i->f = open_memstream(&i->introspection, &i->size);
+ if (!i->f)
+ return -ENOMEM;
+
+ fputs(SD_BUS_INTROSPECT_DOCTYPE
+ "<node>\n", i->f);
+
+ return 0;
+}
+
+int introspect_write_default_interfaces(struct introspect *i, bool object_manager) {
+ assert(i);
+
+ fputs(SD_BUS_INTROSPECT_INTERFACE_PEER
+ SD_BUS_INTROSPECT_INTERFACE_INTROSPECTABLE
+ SD_BUS_INTROSPECT_INTERFACE_PROPERTIES, i->f);
+
+ if (object_manager)
+ fputs(SD_BUS_INTROSPECT_INTERFACE_OBJECT_MANAGER, i->f);
+
+ return 0;
+}
+
+int introspect_write_child_nodes(struct introspect *i, Set *s, const char *prefix) {
+ char *node;
+
+ assert(i);
+ assert(prefix);
+
+ while ((node = set_steal_first(s))) {
+ const char *e;
+
+ e = object_path_startswith(node, prefix);
+ if (e)
+ fprintf(i->f, " <node name=\"%s\"/>\n", e);
+
+ free(node);
+ }
+
+ return 0;
+}
+
+static void introspect_write_flags(struct introspect *i, int type, int flags) {
+ if (flags & SD_BUS_VTABLE_DEPRECATED)
+ fputs(" <annotation name=\"org.freedesktop.DBus.Deprecated\" value=\"true\"/>\n", i->f);
+
+ if (type == _SD_BUS_VTABLE_METHOD && flags & SD_BUS_VTABLE_METHOD_NO_REPLY)
+ fputs(" <annotation name=\"org.freedesktop.DBus.Method.NoReply\" value=\"true\"/>\n", i->f);
+
+ if (type == _SD_BUS_VTABLE_PROPERTY || type == _SD_BUS_VTABLE_WRITABLE_PROPERTY) {
+ if (!(flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))
+ fputs(" <annotation name=\"org.freedesktop.DBus.Property.EmitsChangedSignal\" value=\"false\"/>\n", i->f);
+ else if (flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY)
+ fputs(" <annotation name=\"org.freedesktop.DBus.Property.EmitsChangedSignal\" value=\"invalidates\"/>\n", i->f);
+ }
+}
+
+static int introspect_write_arguments(struct introspect *i, const char *signature, const char *direction) {
+ int r;
+
+ for (;;) {
+ size_t l;
+
+ if (!*signature)
+ return 0;
+
+ r = signature_element_length(signature, &l);
+ if (r < 0)
+ return r;
+
+ fprintf(i->f, " <arg type=\"%.*s\"", (int) l, signature);
+
+ if (direction)
+ fprintf(i->f, " direction=\"%s\">\n", direction);
+ else
+ fputs(">\n", i->f);
+
+ signature += l;
+ }
+}
+
+int introspect_write_interface(struct introspect *i, const char *interface, const sd_bus_vtable *v) {
+ assert(i);
+ assert(interface);
+ assert(v);
+
+ fprintf(i->f, " <interface name=\"%s\">\n", interface);
+
+ for (; v->type != _SD_BUS_VTABLE_END; v++) {
+
+ switch (v->type) {
+
+ case _SD_BUS_VTABLE_START:
+ if (v->flags & SD_BUS_VTABLE_DEPRECATED)
+ fputs(" <annotation name=\"org.freedesktop.DBus.Deprecated\" value=\"true\"/>\n", i->f);
+ break;
+
+ case _SD_BUS_VTABLE_METHOD:
+ fprintf(i->f, " <method name=\"%s\">\n", v->method.member);
+ introspect_write_arguments(i, v->method.signature, "in");
+ introspect_write_arguments(i, v->method.result, "out");
+ introspect_write_flags(i, v->type, v->flags);
+ fputs(" </method>\n", i->f);
+ break;
+
+ case _SD_BUS_VTABLE_PROPERTY:
+ case _SD_BUS_VTABLE_WRITABLE_PROPERTY:
+ fprintf(i->f, " <property name=\"%s\" type=\"%s\" access=\"%s\">\n",
+ v->property.member,
+ v->property.signature,
+ v->type == _SD_BUS_VTABLE_WRITABLE_PROPERTY ? "readwrite" : "read");
+ introspect_write_flags(i, v->type, v->flags);
+ fputs(" </property>\n", i->f);
+ break;
+
+ case _SD_BUS_VTABLE_SIGNAL:
+ fprintf(i->f, " <signal name=\"%s\">\n", v->signal.member);
+ introspect_write_arguments(i, v->signal.signature, NULL);
+ introspect_write_flags(i, v->type, v->flags);
+ fputs(" </signal>\n", i->f);
+ break;
+ }
+
+ }
+
+ fputs(" </interface>\n", i->f);
+ return 0;
+}
+
+int introspect_finish(struct introspect *i, sd_bus *bus, sd_bus_message *m, sd_bus_message **reply) {
+ sd_bus_message *q;
+ int r;
+
+ assert(i);
+ assert(m);
+ assert(reply);
+
+ fputs("</node>\n", i->f);
+ fflush(i->f);
+
+ if (ferror(i->f))
+ return -ENOMEM;
+
+ r = sd_bus_message_new_method_return(bus, m, &q);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(q, "s", i->introspection);
+ if (r < 0) {
+ sd_bus_message_unref(q);
+ return r;
+ }
+
+ *reply = q;
+ return 0;
+}
+
+void introspect_free(struct introspect *i) {
+ assert(i);
+
+ if (i->f)
+ fclose(i->f);
+
+ if (i->introspection)
+ free(i->introspection);
+
+ zero(*i);
+}
~ianmdlvl / elogind.git / blobdiff