X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Flibsystemd%2Fsd-bus%2Fbus-introspect.c;fp=src%2Flibsystemd%2Fsd-bus%2Fbus-introspect.c;h=d528ab2a04b1fe826dc71a15c7b2d15578a19c4b;hb=607553f9306286fdccf0b356bc3d1087adfe21c4;hp=0000000000000000000000000000000000000000;hpb=43d9c2b5848b1363b659c38443c1c94db57415fd;p=elogind.git
diff --git a/src/libsystemd/sd-bus/bus-introspect.c b/src/libsystemd/sd-bus/bus-introspect.c
new file mode 100644
index 000000000..d528ab2a0
--- /dev/null
+++ b/src/libsystemd/sd-bus/bus-introspect.c
@@ -0,0 +1,212 @@
+/*-*- 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 "sd-bus-protocol.h"
+#include "bus-introspect.h"
+#include "bus-signature.h"
+#include "bus-internal.h"
+#include "bus-protocol.h"
+
+int introspect_begin(struct introspect *i, bool trusted) {
+ assert(i);
+
+ zero(*i);
+ i->trusted = trusted;
+
+ i->f = open_memstream(&i->introspection, &i->size);
+ if (!i->f)
+ return -ENOMEM;
+
+ fputs(BUS_INTROSPECT_DOCTYPE
+ "\n", i->f);
+
+ return 0;
+}
+
+int introspect_write_default_interfaces(struct introspect *i, bool object_manager) {
+ assert(i);
+
+ fputs(BUS_INTROSPECT_INTERFACE_PEER
+ BUS_INTROSPECT_INTERFACE_INTROSPECTABLE
+ BUS_INTROSPECT_INTERFACE_PROPERTIES, i->f);
+
+ if (object_manager)
+ fputs(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 && e[0])
+ fprintf(i->f, " \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(" \n", i->f);
+
+ if (type == _SD_BUS_VTABLE_METHOD && (flags & SD_BUS_VTABLE_METHOD_NO_REPLY))
+ fputs(" \n", i->f);
+
+ if (type == _SD_BUS_VTABLE_PROPERTY || type == _SD_BUS_VTABLE_WRITABLE_PROPERTY) {
+ if (flags & SD_BUS_VTABLE_PROPERTY_CONST)
+ fputs(" \n", i->f);
+ else if (flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)
+ fputs(" \n", i->f);
+ else if (!(flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))
+ fputs(" \n", i->f);
+ }
+
+ if (!i->trusted &&
+ (type == _SD_BUS_VTABLE_METHOD || type == _SD_BUS_VTABLE_WRITABLE_PROPERTY) &&
+ !(flags & SD_BUS_VTABLE_UNPRIVILEGED))
+ fputs(" \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, " f, " direction=\"%s\"/>\n", direction);
+ else
+ fputs("/>\n", i->f);
+
+ signature += l;
+ }
+}
+
+int introspect_write_interface(struct introspect *i, const sd_bus_vtable *v) {
+ assert(i);
+ assert(v);
+
+ for (; v->type != _SD_BUS_VTABLE_END; v++) {
+
+ /* Ignore methods, signals and properties that are
+ * marked "hidden", but do show the interface
+ * itself */
+
+ if (v->type != _SD_BUS_VTABLE_START && (v->flags & SD_BUS_VTABLE_HIDDEN))
+ continue;
+
+ switch (v->type) {
+
+ case _SD_BUS_VTABLE_START:
+ if (v->flags & SD_BUS_VTABLE_DEPRECATED)
+ fputs(" \n", i->f);
+ break;
+
+ case _SD_BUS_VTABLE_METHOD:
+ fprintf(i->f, " \n", v->x.method.member);
+ introspect_write_arguments(i, strempty(v->x.method.signature), "in");
+ introspect_write_arguments(i, strempty(v->x.method.result), "out");
+ introspect_write_flags(i, v->type, v->flags);
+ fputs(" \n", i->f);
+ break;
+
+ case _SD_BUS_VTABLE_PROPERTY:
+ case _SD_BUS_VTABLE_WRITABLE_PROPERTY:
+ fprintf(i->f, " \n",
+ v->x.property.member,
+ v->x.property.signature,
+ v->type == _SD_BUS_VTABLE_WRITABLE_PROPERTY ? "readwrite" : "read");
+ introspect_write_flags(i, v->type, v->flags);
+ fputs(" \n", i->f);
+ break;
+
+ case _SD_BUS_VTABLE_SIGNAL:
+ fprintf(i->f, " \n", v->x.signal.member);
+ introspect_write_arguments(i, strempty(v->x.signal.signature), NULL);
+ introspect_write_flags(i, v->type, v->flags);
+ fputs(" \n", i->f);
+ break;
+ }
+
+ }
+
+ 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("\n", i->f);
+ fflush(i->f);
+
+ if (ferror(i->f))
+ return -ENOMEM;
+
+ r = sd_bus_message_new_method_return(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);
+}