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Diffstat (limited to 'src/libsystemd-bus/sd-bus.c')
-rw-r--r--src/libsystemd-bus/sd-bus.c1973
1 files changed, 1815 insertions, 158 deletions
diff --git a/src/libsystemd-bus/sd-bus.c b/src/libsystemd-bus/sd-bus.c
index db0880f21c..b1dcd8dc62 100644
--- a/src/libsystemd-bus/sd-bus.c
+++ b/src/libsystemd-bus/sd-bus.c
@@ -42,6 +42,8 @@
#include "bus-socket.h"
#include "bus-kernel.h"
#include "bus-control.h"
+#include "bus-introspect.h"
+#include "bus-signature.h"
static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec);
@@ -57,9 +59,46 @@ static void bus_close_fds(sd_bus *b) {
b->input_fd = b->output_fd = -1;
}
+static void bus_node_destroy(sd_bus *b, struct node *n) {
+ struct node_callback *c;
+ struct node_vtable *v;
+ struct node_enumerator *e;
+
+ assert(b);
+
+ if (!n)
+ return;
+
+ while (n->child)
+ bus_node_destroy(b, n->child);
+
+ while ((c = n->callbacks)) {
+ LIST_REMOVE(struct node_callback, callbacks, n->callbacks, c);
+ free(c);
+ }
+
+ while ((v = n->vtables)) {
+ LIST_REMOVE(struct node_vtable, vtables, n->vtables, v);
+ free(v->interface);
+ free(v);
+ }
+
+ while ((e = n->enumerators)) {
+ LIST_REMOVE(struct node_enumerator, enumerators, n->enumerators, e);
+ free(e);
+ }
+
+ if (n->parent)
+ LIST_REMOVE(struct node, siblings, n->parent->child, n);
+
+ assert_se(hashmap_remove(b->nodes, n->path) == n);
+ free(n->path);
+ free(n);
+}
+
static void bus_free(sd_bus *b) {
struct filter_callback *f;
- struct object_callback *c;
+ struct node *n;
unsigned i;
assert(b);
@@ -97,14 +136,16 @@ static void bus_free(sd_bus *b) {
free(f);
}
- while ((c = hashmap_steal_first(b->object_callbacks))) {
- free(c->path);
- free(c);
- }
-
- hashmap_free(b->object_callbacks);
bus_match_free(&b->match_callbacks);
+ hashmap_free_free(b->vtable_methods);
+ hashmap_free_free(b->vtable_properties);
+
+ while ((n = hashmap_first(b->nodes)))
+ bus_node_destroy(b, n);
+
+ hashmap_free(b->nodes);
+
bus_kernel_flush_memfd(b);
assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0);
@@ -1818,13 +1859,10 @@ static int process_builtin(sd_bus *bus, sd_bus_message *m) {
r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid));
} else {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
- sd_bus_error_set(&error,
- "org.freedesktop.DBus.Error.UnknownMethod",
+ r = sd_bus_message_new_method_errorf(
+ bus, m, &reply,
+ "org.freedesktop.DBus.Error.UnknownMethod",
"Unknown method '%s' on interface '%s'.", m->member, m->interface);
-
- r = sd_bus_message_new_method_error(bus, m, &error, &reply);
}
if (r < 0)
@@ -1837,90 +1875,446 @@ static int process_builtin(sd_bus *bus, sd_bus_message *m) {
return 1;
}
-static int process_object(sd_bus *bus, sd_bus_message *m) {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- struct object_callback *c;
+static int node_vtable_get_userdata(
+ sd_bus *bus,
+ const char *path,
+ struct node_vtable *c,
+ void **userdata) {
+
+ void *u;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(c);
+ assert(userdata);
+
+ u = c->userdata;
+ if (c->find) {
+ r = c->find(bus, path, c->interface, &u, u);
+ if (r <= 0)
+ return r;
+ }
+
+ *userdata = u;
+ return 1;
+}
+
+static void *vtable_property_convert_userdata(const sd_bus_vtable *p, void *u) {
+ assert(p);
+
+ return (uint8_t*) u + p->property.offset;
+}
+
+static int vtable_property_get_userdata(
+ sd_bus *bus,
+ const char *path,
+ struct vtable_member *p,
+ void **userdata) {
+
+ void *u;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(p);
+ assert(userdata);
+
+ r = node_vtable_get_userdata(bus, path, p->parent, &u);
+ if (r <= 0)
+ return r;
+
+ *userdata = vtable_property_convert_userdata(p->vtable, u);
+ return 1;
+}
+
+static int add_enumerated_to_set(sd_bus *bus, const char *prefix, struct node_enumerator *first, Set *s) {
+ struct node_enumerator *c;
+ int r;
+
+ assert(bus);
+ assert(prefix);
+ assert(s);
+
+ LIST_FOREACH(enumerators, c, first) {
+ char **children = NULL, **k;
+
+ r = c->callback(bus, prefix, &children, c->userdata);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(k, children) {
+ if (r < 0) {
+ free(*k);
+ continue;
+ }
+
+ if (!object_path_is_valid(*k) && object_path_startswith(*k, prefix)) {
+ free(*k);
+ r = -EINVAL;
+ continue;
+ }
+
+ r = set_consume(s, *k);
+ }
+
+ free(children);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int add_subtree_to_set(sd_bus *bus, const char *prefix, struct node *n, Set *s) {
+ struct node *i;
+ int r;
+
+ assert(bus);
+ assert(prefix);
+ assert(n);
+ assert(s);
+
+ r = add_enumerated_to_set(bus, prefix, n->enumerators, s);
+ if (r < 0)
+ return r;
+
+ LIST_FOREACH(siblings, i, n->child) {
+ char *t;
+
+ t = strdup(i->path);
+ if (!t)
+ return -ENOMEM;
+
+ r = set_consume(s, t);
+ if (r < 0 && r != -EEXIST)
+ return r;
+
+ r = add_subtree_to_set(bus, prefix, i, s);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int get_child_nodes(sd_bus *bus, const char *prefix, struct node *n, Set **_s) {
+ Set *s = NULL;
+ int r;
+
+ assert(bus);
+ assert(n);
+ assert(_s);
+
+ s = set_new(string_hash_func, string_compare_func);
+ if (!s)
+ return -ENOMEM;
+
+ r = add_subtree_to_set(bus, prefix, n, s);
+ if (r < 0) {
+ set_free_free(s);
+ return r;
+ }
+
+ *_s = s;
+ return 0;
+}
+
+static int node_callbacks_run(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct node_callback *first,
+ bool require_fallback,
+ bool *found_object) {
+
+ struct node_callback *c;
int r;
- bool found = false;
- size_t pl;
assert(bus);
assert(m);
+ assert(found_object);
- if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
+ LIST_FOREACH(callbacks, c, first) {
+ if (require_fallback && !c->is_fallback)
+ continue;
+
+ *found_object = true;
+
+ if (c->last_iteration == bus->iteration_counter)
+ continue;
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ r = c->callback(bus, m, c->userdata);
+ if (r != 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int method_callbacks_run(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct vtable_member *c,
+ bool require_fallback,
+ bool *found_object) {
+
+ const char *signature;
+ void *u;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(c);
+ assert(found_object);
+
+ if (require_fallback && !c->parent->is_fallback)
return 0;
- if (hashmap_isempty(bus->object_callbacks))
+ r = node_vtable_get_userdata(bus, m->path, c->parent, &u);
+ if (r <= 0)
+ return r;
+
+ *found_object = true;
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_get_signature(m, true, &signature);
+ if (r < 0)
+ return r;
+
+ if (!streq(c->vtable->method.signature, signature)) {
+ r = sd_bus_reply_method_errorf(bus, m,
+ "org.freedesktop.DBus.Error.InvalidArgs",
+ "Invalid arguments '%s' to call %s:%s, expecting '%s'.",
+ signature, c->interface, c->member, c->vtable->method.signature);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+
+ return c->vtable->method.handler(bus, m, u);
+}
+
+static int property_get_set_callbacks_run(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct vtable_member *c,
+ bool require_fallback,
+ bool is_get,
+ bool *found_object) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ void *u;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(found_object);
+
+ if (require_fallback && !c->parent->is_fallback)
return 0;
- pl = strlen(m->path);
+ r = vtable_property_get_userdata(bus, m->path, c, &u);
+ if (r <= 0)
+ return r;
- do {
- char p[pl+1];
+ *found_object = true;
- bus->object_callbacks_modified = false;
+ r = sd_bus_message_new_method_return(bus, m, &reply);
+ if (r < 0)
+ return r;
- c = hashmap_get(bus->object_callbacks, m->path);
- if (c && c->last_iteration != bus->iteration_counter) {
+ c->last_iteration = bus->iteration_counter;
- c->last_iteration = bus->iteration_counter;
+ if (is_get) {
+ r = sd_bus_message_open_container(reply, 'v', c->vtable->property.signature);
+ if (r < 0)
+ return r;
- r = sd_bus_message_rewind(m, true);
+ if (c->vtable->property.get) {
+ r = c->vtable->property.get(bus, m->path, c->interface, c->member, reply, &error, u);
if (r < 0)
return r;
+ } else
+ assert_not_reached("automatic properties not supported yet");
- r = c->callback(bus, m, c->userdata);
- if (r != 0)
+ if (sd_bus_error_is_set(&error)) {
+ r = sd_bus_reply_method_error(bus, m, &error);
+ if (r < 0)
return r;
- found = true;
+ return 1;
}
- /* Look for fallback prefixes */
- strcpy(p, m->path);
- for (;;) {
- char *e;
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
- if (bus->object_callbacks_modified)
- break;
+ } else {
+ if (c->vtable->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY)
+ sd_bus_error_setf(&error, "org.freedesktop.DBus.Error.PropertyReadOnly", "Property '%s' is not writable.", c->member);
+ else {
+ r = sd_bus_message_enter_container(m, 'v', c->vtable->property.signature);
+ if (r < 0)
+ return r;
- e = strrchr(p, '/');
- if (e == p || !e)
- break;
+ if (c->vtable->property.set) {
+ r = c->vtable->property.set(bus, m->path, c->interface, c->member, m, &error, u);
+ if (r < 0)
+ return r;
+ } else
+ assert_not_reached("automatic properties not supported yet");
+ }
- *e = 0;
+ if (sd_bus_error_is_set(&error)) {
+ r = sd_bus_reply_method_error(bus, m, &error);
+ if (r < 0)
+ return r;
- c = hashmap_get(bus->object_callbacks, p);
- if (c && c->last_iteration != bus->iteration_counter && c->is_fallback) {
+ return 1;
+ }
- c->last_iteration = bus->iteration_counter;
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+ }
- r = sd_bus_message_rewind(m, true);
- if (r < 0)
- return r;
+ r = sd_bus_send(bus, reply, NULL);
+ if (r < 0)
+ return r;
- r = c->callback(bus, m, c->userdata);
- if (r != 0)
- return r;
+ return 1;
+}
- found = true;
- }
- }
+static int vtable_append_all_properties(
+ sd_bus *bus,
+ sd_bus_message *reply,
+ const char *path,
+ struct node_vtable *c,
+ void *userdata,
+ sd_bus_error *error) {
- } while (bus->object_callbacks_modified);
+ const sd_bus_vtable *v;
+ int r;
- /* We found some handlers but none wanted to take this, then
- * return this -- with one exception, we can handle
- * introspection minimally ourselves */
- if (!found || sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect"))
- return 0;
+ assert(bus);
+ assert(reply);
+ assert(c);
+
+ for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) {
+ if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY)
+ continue;
+
+ r = sd_bus_message_open_container(reply, 'e', "sv");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(reply, "s", c->interface);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'v', v->property.signature);
+ if (r < 0)
+ return r;
+
+ r = v->property.get(bus, path, c->interface, v->property.member, reply, error, vtable_property_convert_userdata(v, userdata));
+ if (r < 0)
+ return r;
+
+ if (sd_bus_error_is_set(error))
+ return 0;
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+ }
- sd_bus_error_set(&error,
- "org.freedesktop.DBus.Error.UnknownMethod",
- "Unknown method '%s' or interface '%s'.", m->member, m->interface);
+ return 1;
+}
+
+static int property_get_all_callbacks_run(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct node_vtable *first,
+ bool require_fallback,
+ const char *iface,
+ bool *found_object) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ struct node_vtable *c;
+ bool found_interface = false;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(found_object);
- r = sd_bus_message_new_method_error(bus, m, &error, &reply);
+ r = sd_bus_message_new_method_return(bus, m, &reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'a', "{sv}");
+ if (r < 0)
+ return r;
+
+ LIST_FOREACH(vtables, c, first) {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ void *u;
+
+ if (require_fallback && !c->is_fallback)
+ continue;
+
+ r = node_vtable_get_userdata(bus, m->path, c, &u);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ continue;
+
+ *found_object = true;
+
+ if (iface && !streq(c->interface, iface))
+ continue;
+ found_interface = true;
+
+ c->last_iteration = bus->iteration_counter;
+
+ r = vtable_append_all_properties(bus, reply, m->path, c, u, &error);
+ if (r < 0)
+ return r;
+
+ if (sd_bus_error_is_set(&error)) {
+ r = sd_bus_reply_method_error(bus, m, &error);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+ }
+
+ if (!found_interface) {
+ r = sd_bus_reply_method_errorf(
+ bus, m,
+ "org.freedesktop.DBus.Error.UnknownInterface",
+ "Unknown interface '%s'.", iface);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+
+ r = sd_bus_message_close_container(reply);
if (r < 0)
return r;
@@ -1931,84 +2325,359 @@ static int process_object(sd_bus *bus, sd_bus_message *m) {
return 1;
}
-static int process_introspect(sd_bus *bus, sd_bus_message *m) {
+static bool bus_node_with_object_manager(sd_bus *bus, struct node *n) {
+ assert(bus);
+
+ if (n->object_manager)
+ return true;
+
+ if (n->parent)
+ return bus_node_with_object_manager(bus, n->parent);
+
+ return false;
+}
+
+static bool bus_node_exists(sd_bus *bus, struct node *n, const char *path, bool require_fallback) {
+ struct node_vtable *c;
+ struct node_callback *k;
+
+ assert(bus);
+ assert(n);
+
+ if (n->child)
+ return true;
+
+ LIST_FOREACH(callbacks, k, n->callbacks) {
+ if (require_fallback && !k->is_fallback)
+ continue;
+
+ return true;
+ }
+
+ LIST_FOREACH(vtables, c, n->vtables) {
+
+ if (require_fallback && !c->is_fallback)
+ continue;
+
+ return true;
+ }
+
+ return !require_fallback && (n->enumerators || n->object_manager);
+
+}
+
+static int process_introspect(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct node *n,
+ bool require_fallback,
+ bool *found_object) {
+
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- _cleanup_free_ char *introspection = NULL;
_cleanup_set_free_free_ Set *s = NULL;
- _cleanup_fclose_ FILE *f = NULL;
- struct object_callback *c;
- Iterator i;
- size_t size = 0;
- char *node;
+ struct introspect intro;
+ struct node_vtable *c;
+ bool empty;
int r;
assert(bus);
assert(m);
+ assert(n);
+ assert(found_object);
- if (!sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect"))
- return 0;
+ r = get_child_nodes(bus, m->path, n, &s);
+ if (r < 0)
+ return r;
- if (!m->path)
- return 0;
+ r = introspect_begin(&intro);
+ if (r < 0)
+ return r;
- s = set_new(string_hash_func, string_compare_func);
- if (!s)
- return -ENOMEM;
+ r = introspect_write_default_interfaces(&intro, bus_node_with_object_manager(bus, n));
+ if (r < 0)
+ return r;
- HASHMAP_FOREACH(c, bus->object_callbacks, i) {
- const char *e;
- char *a, *p;
+ empty = set_isempty(s);
- if (streq(c->path, "/"))
+ LIST_FOREACH(vtables, c, n->vtables) {
+ void *u;
+
+ if (require_fallback && !c->is_fallback)
continue;
- if (streq(m->path, "/"))
- e = c->path;
- else {
- e = startswith(c->path, m->path);
- if (!e || *e != '/')
- continue;
- }
+ r = node_vtable_get_userdata(bus, m->path, c, &u);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ continue;
- a = strdup(e+1);
- if (!a)
- return -ENOMEM;
+ empty = false;
- p = strchr(a, '/');
- if (p)
- *p = 0;
+ r = introspect_write_interface(&intro, c->interface, c->vtable);
+ if (r < 0)
+ goto finish;
+ }
- r = set_consume(s, a);
- if (r < 0 && r != -EEXIST)
+ if (empty) {
+ /* Nothing?, let's see if we exist at all, and if not
+ * refuse to do anything */
+ r = bus_node_exists(bus, n, m->path, require_fallback);
+ if (r < 0)
return r;
+
+ if (r == 0)
+ goto finish;
}
- f = open_memstream(&introspection, &size);
- if (!f)
- return -ENOMEM;
+ *found_object = true;
+
+ r = introspect_write_child_nodes(&intro, s, m->path);
+ if (r < 0)
+ goto finish;
+
+ r = introspect_finish(&intro, bus, m, &reply);
+ if (r < 0)
+ goto finish;
+
+ r = sd_bus_send(bus, reply, NULL);
+ if (r < 0)
+ goto finish;
+
+ r = 1;
+
+finish:
+ introspect_free(&intro);
+ return r;
+}
+
+static int object_manager_serialize_vtable(
+ sd_bus *bus,
+ sd_bus_message *reply,
+ const char *path,
+ struct node_vtable *c,
+ sd_bus_error *error) {
+
+ void *u;
+ int r;
+
+ assert(bus);
+ assert(reply);
+ assert(path);
+ assert(c);
+ assert(error);
+
+ r = node_vtable_get_userdata(bus, path, c, &u);
+ if (r <= 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'e', "sa{sv}");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(reply, "s", c->interface);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'a', "{sv}");
+ if (r < 0)
+ return r;
+
+ r = vtable_append_all_properties(bus, reply, path, c, u, error);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int object_manager_serialize_path(
+ sd_bus *bus,
+ sd_bus_message *reply,
+ const char *path,
+ bool require_fallback,
+ sd_bus_error *error) {
+
+ struct node_vtable *i;
+ struct node *n;
+ int r;
+
+ assert(bus);
+ assert(reply);
+ assert(path);
+ assert(error);
+
+ n = hashmap_get(bus->nodes, path);
+ if (!n)
+ return 0;
+
+ r = sd_bus_message_open_container(reply, 'e', "oa{sa{sv}}");
+ if (r < 0)
+ return r;
- fputs(SD_BUS_INTROSPECT_DOCTYPE, f);
- fputs("<node>\n", f);
- fputs(SD_BUS_INTROSPECT_INTERFACE_PEER, f);
- fputs(SD_BUS_INTROSPECT_INTERFACE_INTROSPECTABLE, f);
+ r = sd_bus_message_append(reply, "o", path);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'a', "{sa{sv}}");
+ if (r < 0)
+ return r;
- while ((node = set_steal_first(s))) {
- fprintf(f, " <node name=\"%s\"/>\n", node);
- free(node);
+ LIST_FOREACH(vtables, i, n->vtables) {
+
+ if (require_fallback && !i->is_fallback)
+ continue;
+
+ r = object_manager_serialize_vtable(bus, reply, path, i, error);
+ if (r < 0)
+ return r;
+ if (sd_bus_error_is_set(error))
+ return 0;
}
- fputs("</node>\n", f);
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
- fflush(f);
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
- if (ferror(f))
- return -ENOMEM;
+ return 1;
+}
+
+static int object_manager_serialize_path_and_fallbacks(
+ sd_bus *bus,
+ sd_bus_message *reply,
+ const char *path,
+ sd_bus_error *error) {
+
+ size_t pl;
+ int r;
+
+ assert(bus);
+ assert(reply);
+ assert(path);
+ assert(error);
+
+ /* First, add all vtables registered for this path */
+ r = object_manager_serialize_path(bus, reply, path, false, error);
+ if (r < 0)
+ return r;
+ if (sd_bus_error_is_set(error))
+ return 0;
+
+ /* Second, add fallback vtables registered for any of the prefixes */
+ pl = strlen(path);
+ if (pl > 1) {
+ char p[pl + 1];
+ strcpy(p, path);
+
+ for (;;) {
+ char *e;
+
+ e = strrchr(p, '/');
+ if (e == p || !e)
+ break;
+
+ *e = 0;
+
+ r = object_manager_serialize_path(bus, reply, p, true, error);
+ if (r < 0)
+ return r;
+
+ if (sd_bus_error_is_set(error))
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+static int process_get_managed_objects(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct node *n,
+ bool require_fallback,
+ bool *found_object) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_set_free_free_ Set *s = NULL;
+ bool empty;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(n);
+ assert(found_object);
+
+ if (!bus_node_with_object_manager(bus, n))
+ return 0;
+
+ r = get_child_nodes(bus, m->path, n, &s);
+ if (r < 0)
+ return r;
r = sd_bus_message_new_method_return(bus, m, &reply);
if (r < 0)
return r;
- r = sd_bus_message_append(reply, "s", introspection);
+ r = sd_bus_message_open_container(reply, 'a', "{oa{sa{sv}}}");
+ if (r < 0)
+ return r;
+
+ empty = set_isempty(s);
+ if (empty) {
+ struct node_vtable *c;
+
+ /* Hmm, so we have no children? Then let's check
+ * whether we exist at all, i.e. whether at least one
+ * vtable exists. */
+
+ LIST_FOREACH(vtables, c, n->vtables) {
+
+ if (require_fallback && !c->is_fallback)
+ continue;
+
+ if (r < 0)
+ return r;
+ if (r == 0)
+ continue;
+
+ empty = false;
+ break;
+ }
+
+ if (empty)
+ return 0;
+ } else {
+ Iterator i;
+ char *path;
+
+ SET_FOREACH(path, s, i) {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error);
+ if (r < 0)
+ return -ENOMEM;
+
+ if (sd_bus_error_is_set(&error)) {
+ r = sd_bus_reply_method_error(bus, m, &error);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+ }
+ }
+
+ r = sd_bus_message_close_container(reply);
if (r < 0)
return r;
@@ -2019,6 +2688,182 @@ static int process_introspect(sd_bus *bus, sd_bus_message *m) {
return 1;
}
+static int object_find_and_run(sd_bus *bus, sd_bus_message *m, const char *p, bool require_fallback, bool *found_object) {
+ struct node *n;
+ struct vtable_member vtable_key, *v;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(p);
+ assert(found_object);
+
+ n = hashmap_get(bus->nodes, p);
+ if (!n)
+ return 0;
+
+ /* First, try object callbacks */
+ r = node_callbacks_run(bus, m, n->callbacks, require_fallback, found_object);
+ if (r != 0)
+ return r;
+
+ if (!m->interface || !m->member)
+ return 0;
+
+ /* Then, look for a known method */
+ vtable_key.path = (char*) p;
+ vtable_key.interface = m->interface;
+ vtable_key.member = m->member;
+
+ v = hashmap_get(bus->vtable_methods, &vtable_key);
+ if (v) {
+ r = method_callbacks_run(bus, m, v, require_fallback, found_object);
+ if (r != 0)
+ return r;
+ }
+
+ /* Then, look for a known property */
+ if (streq(m->interface, "org.freedesktop.DBus.Properties")) {
+ bool get = false;
+
+ get = streq(m->member, "Get");
+
+ if (get || streq(m->member, "Set")) {
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ vtable_key.path = (char*) p;
+
+ r = sd_bus_message_read(m, "ss", &vtable_key.interface, &vtable_key.member);
+ if (r < 0)
+ return r;
+
+ v = hashmap_get(bus->vtable_properties, &vtable_key);
+ if (v) {
+ r = property_get_set_callbacks_run(bus, m, v, require_fallback, get, found_object);
+ if (r != 0)
+ return r;
+ }
+
+ } else if (streq(m->member, "GetAll")) {
+ const char *iface;
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(m, "s", &iface);
+ if (r < 0)
+ return r;
+
+ if (iface[0] == 0)
+ iface = NULL;
+
+ r = property_get_all_callbacks_run(bus, m, n->vtables, require_fallback, iface, found_object);
+ if (r != 0)
+ return r;
+ }
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
+
+ r = process_introspect(bus, m, n, require_fallback, found_object);
+ if (r != 0)
+ return r;
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.ObjectManager", "GetManagedObjects")) {
+
+ r = process_get_managed_objects(bus, m, n, require_fallback, found_object);
+ if (r != 0)
+ return r;
+ }
+
+ if (!*found_object) {
+ r = bus_node_exists(bus, n, m->path, require_fallback);
+ if (r < 0)
+ return r;
+
+ if (r > 0)
+ *found_object = true;
+ }
+
+ return 0;
+}
+
+static int process_object(sd_bus *bus, sd_bus_message *m) {
+ int r;
+ size_t pl;
+ bool found_object = false;
+
+ assert(bus);
+ assert(m);
+
+ if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
+ return 0;
+
+ if (!m->path)
+ return 0;
+
+ if (hashmap_isempty(bus->nodes))
+ return 0;
+
+ pl = strlen(m->path);
+ do {
+ char p[pl+1];
+
+ bus->nodes_modified = false;
+
+ r = object_find_and_run(bus, m, m->path, false, &found_object);
+ if (r != 0)
+ return r;
+
+ /* Look for fallback prefixes */
+ strcpy(p, m->path);
+ for (;;) {
+ char *e;
+
+ if (streq(p, "/"))
+ break;
+
+ if (bus->nodes_modified)
+ break;
+
+ e = strrchr(p, '/');
+ assert(e);
+ if (e == p)
+ *(e+1) = 0;
+ else
+ *e = 0;
+
+ r = object_find_and_run(bus, m, p, true, &found_object);
+ if (r != 0)
+ return r;
+ }
+
+ } while (bus->nodes_modified);
+
+ if (!found_object)
+ return 0;
+
+ if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get") ||
+ sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Set"))
+ r = sd_bus_reply_method_errorf(
+ bus, m,
+ "org.freedesktop.DBus.Error.UnknownProperty",
+ "Unknown property or interface.");
+ else
+ r = sd_bus_reply_method_errorf(
+ bus, m,
+ "org.freedesktop.DBus.Error.UnknownMethod",
+ "Unknown method '%s' or interface '%s'.", m->member, m->interface);
+
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
static int process_message(sd_bus *bus, sd_bus_message *m) {
int r;
@@ -2047,11 +2892,7 @@ static int process_message(sd_bus *bus, sd_bus_message *m) {
if (r != 0)
return r;
- r = process_object(bus, m);
- if (r != 0)
- return r;
-
- return process_introspect(bus, m);
+ return process_object(bus, m);
}
static int process_running(sd_bus *bus, sd_bus_message **ret) {
@@ -2090,16 +2931,11 @@ static int process_running(sd_bus *bus, sd_bus_message **ret) {
}
if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_CALL) {
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
- sd_bus_error_set(&error, "org.freedesktop.DBus.Error.UnknownObject", "Unknown object '%s'.", m->path);
-
- r = sd_bus_message_new_method_error(bus, m, &error, &reply);
- if (r < 0)
- return r;
- r = sd_bus_send(bus, reply, NULL);
+ r = sd_bus_reply_method_errorf(
+ bus, m,
+ "org.freedesktop.DBus.Error.UnknownObject",
+ "Unknown object '%s'.", m->path);
if (r < 0)
return r;
}
@@ -2305,52 +3141,128 @@ int sd_bus_remove_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *u
return 0;
}
+static struct node *bus_node_allocate(sd_bus *bus, const char *path) {
+ struct node *n, *parent;
+ const char *e;
+ char *s, *p;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(path[0] == '/');
+
+ n = hashmap_get(bus->nodes, path);
+ if (n)
+ return n;
+
+ r = hashmap_ensure_allocated(&bus->nodes, string_hash_func, string_compare_func);
+ if (r < 0)
+ return NULL;
+
+ s = strdup(path);
+ if (!s)
+ return NULL;
+
+ if (streq(path, "/"))
+ parent = NULL;
+ else {
+ e = strrchr(path, '/');
+ assert(e);
+
+ p = strndupa(path, MAX(1, path - e));
+
+ parent = bus_node_allocate(bus, p);
+ if (!parent) {
+ free(s);
+ return NULL;
+ }
+ }
+
+ n = new0(struct node, 1);
+ if (!n)
+ return NULL;
+
+ n->parent = parent;
+ n->path = s;
+
+ r = hashmap_put(bus->nodes, s, n);
+ if (r < 0) {
+ free(s);
+ free(n);
+ return NULL;
+ }
+
+ if (parent)
+ LIST_PREPEND(struct node, siblings, parent->child, n);
+
+ return n;
+}
+
+static void bus_node_gc(sd_bus *b, struct node *n) {
+ assert(b);
+
+ if (!n)
+ return;
+
+ if (n->child ||
+ n->callbacks ||
+ n->vtables ||
+ n->enumerators ||
+ n->object_manager)
+ return;
+
+ assert(hashmap_remove(b->nodes, n->path) == n);
+
+ if (n->parent)
+ LIST_REMOVE(struct node, siblings, n->parent->child, n);
+
+ free(n->path);
+ bus_node_gc(b, n->parent);
+ free(n);
+}
+
static int bus_add_object(
- sd_bus *bus,
+ sd_bus *b,
bool fallback,
const char *path,
sd_bus_message_handler_t callback,
void *userdata) {
- struct object_callback *c;
+ struct node_callback *c;
+ struct node *n;
int r;
- if (!bus)
+ if (!b)
return -EINVAL;
- if (!path)
+ if (!object_path_is_valid(path))
return -EINVAL;
if (!callback)
return -EINVAL;
- if (bus_pid_changed(bus))
+ if (bus_pid_changed(b))
return -ECHILD;
- r = hashmap_ensure_allocated(&bus->object_callbacks, string_hash_func, string_compare_func);
- if (r < 0)
- return r;
-
- c = new0(struct object_callback, 1);
- if (!c)
+ n = bus_node_allocate(b, path);
+ if (!n)
return -ENOMEM;
- c->path = strdup(path);
- if (!c->path) {
- free(c);
- return -ENOMEM;
+ c = new0(struct node_callback, 1);
+ if (!c) {
+ r = -ENOMEM;
+ goto fail;
}
+ c->node = n;
c->callback = callback;
c->userdata = userdata;
c->is_fallback = fallback;
- bus->object_callbacks_modified = true;
- r = hashmap_put(bus->object_callbacks, c->path, c);
- if (r < 0) {
- free(c->path);
- free(c);
- return r;
- }
-
+ LIST_PREPEND(struct node_callback, callbacks, n->callbacks, c);
return 0;
+
+fail:
+ free(c);
+ bus_node_gc(b, n);
+ return r;
}
static int bus_remove_object(
@@ -2360,30 +3272,33 @@ static int bus_remove_object(
sd_bus_message_handler_t callback,
void *userdata) {
- struct object_callback *c;
+ struct node_callback *c;
+ struct node *n;
if (!bus)
return -EINVAL;
- if (!path)
+ if (!object_path_is_valid(path))
return -EINVAL;
if (!callback)
return -EINVAL;
if (bus_pid_changed(bus))
return -ECHILD;
- c = hashmap_get(bus->object_callbacks, path);
- if (!c)
+ n = hashmap_get(bus->nodes, path);
+ if (!n)
return 0;
- if (c->callback != callback || c->userdata != userdata || c->is_fallback != fallback)
+ LIST_FOREACH(callbacks, c, n->callbacks)
+ if (c->callback == callback && c->userdata == userdata && c->is_fallback == fallback)
+ break;
+ if (!c)
return 0;
- bus->object_callbacks_modified = true;
- assert_se(c == hashmap_remove(bus->object_callbacks, c->path));
-
- free(c->path);
+ LIST_REMOVE(struct node_callback, callbacks, n->callbacks, c);
free(c);
+ bus_node_gc(bus, n);
+
return 1;
}
@@ -2605,6 +3520,40 @@ int sd_bus_reply_method_error(
return sd_bus_send(bus, m, NULL);
}
+int sd_bus_reply_method_errorf(
+ sd_bus *bus,
+ sd_bus_message *call,
+ const char *name,
+ const char *format,
+ ...) {
+
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ char *n, *m;
+ va_list ap;
+ int r;
+
+ n = strdup(name);
+ if (!n)
+ return -ENOMEM;
+
+ if (format) {
+ va_start(ap, format);
+ r = vasprintf(&m, format, ap);
+ va_end(ap);
+
+ if (r < 0) {
+ free(n);
+ return -ENOMEM;
+ }
+ }
+
+ error.name = n;
+ error.message = m;
+ error.need_free = true;
+
+ return sd_bus_reply_method_error(bus, call, &error);
+}
+
bool bus_pid_changed(sd_bus *bus) {
assert(bus);
@@ -2613,3 +3562,711 @@ bool bus_pid_changed(sd_bus *bus) {
return bus->original_pid != getpid();
}
+
+static void free_node_vtable(sd_bus *bus, struct node_vtable *w) {
+ assert(bus);
+
+ if (!w)
+ return;
+
+ if (w->interface && w->node && w->vtable) {
+ const sd_bus_vtable *v;
+
+ for (v = w->vtable; v->type != _SD_BUS_VTABLE_END; w++) {
+ struct vtable_member *x = NULL;
+
+ switch (v->type) {
+
+ case _SD_BUS_VTABLE_METHOD: {
+ struct vtable_member key;
+
+ key.path = w->node->path;
+ key.interface = w->interface;
+ key.member = v->method.member;
+
+ x = hashmap_remove(bus->vtable_methods, &key);
+ break;
+ }
+
+ case _SD_BUS_VTABLE_PROPERTY:
+ case _SD_BUS_VTABLE_WRITABLE_PROPERTY: {
+ struct vtable_member key;
+
+ key.path = w->node->path;
+ key.interface = w->interface;
+ key.member = v->property.member;
+ x = hashmap_remove(bus->vtable_properties, &key);
+ break;
+ }}
+
+ free(x);
+ }
+ }
+
+ free(w->interface);
+ free(w);
+}
+
+static unsigned vtable_member_hash_func(const void *a) {
+ const struct vtable_member *m = a;
+
+ return
+ string_hash_func(m->path) ^
+ string_hash_func(m->interface) ^
+ string_hash_func(m->member);
+}
+
+static int vtable_member_compare_func(const void *a, const void *b) {
+ const struct vtable_member *x = a, *y = b;
+ int r;
+
+ r = strcmp(x->path, y->path);
+ if (r != 0)
+ return r;
+
+ r = strcmp(x->interface, y->interface);
+ if (r != 0)
+ return r;
+
+ return strcmp(x->member, y->member);
+}
+
+static int add_object_vtable_internal(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const sd_bus_vtable *vtable,
+ bool fallback,
+ sd_bus_object_find_t find,
+ void *userdata) {
+
+ struct node_vtable *c, *i;
+ const sd_bus_vtable *v;
+ struct node *n;
+ int r;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!interface_name_is_valid(interface))
+ return -EINVAL;
+ if (!vtable || vtable[0].type != _SD_BUS_VTABLE_START || vtable[0].start.element_size != sizeof(struct sd_bus_vtable))
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ r = hashmap_ensure_allocated(&bus->vtable_methods, vtable_member_hash_func, vtable_member_compare_func);
+ if (r < 0)
+ return r;
+
+ r = hashmap_ensure_allocated(&bus->vtable_properties, vtable_member_hash_func, vtable_member_compare_func);
+ if (r < 0)
+ return r;
+
+ n = bus_node_allocate(bus, path);
+ if (!n)
+ return -ENOMEM;
+
+ LIST_FOREACH(vtables, i, n->vtables) {
+ if (streq(i->interface, interface)) {
+ r = -EEXIST;
+ goto fail;
+ }
+
+ if (i->is_fallback != fallback) {
+ r = -EPROTOTYPE;
+ goto fail;
+ }
+ }
+
+ c = new0(struct node_vtable, 1);
+ if (!c) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->node = n;
+ c->is_fallback = fallback;
+ c->vtable = vtable;
+ c->userdata = userdata;
+ c->find = find;
+
+ c->interface = strdup(interface);
+ if (!c->interface) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) {
+
+ switch (v->type) {
+
+ case _SD_BUS_VTABLE_METHOD: {
+ struct vtable_member *m;
+
+ if (!member_name_is_valid(v->method.member) ||
+ !signature_is_valid(v->method.signature, false) ||
+ !signature_is_valid(v->method.result, false) ||
+ !v->method.handler ||
+ v->flags & (SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY)) {
+ r = -EINVAL;
+ goto fail;
+ }
+
+ m = new0(struct vtable_member, 1);
+ if (!m) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ m->parent = c;
+ m->path = n->path;
+ m->interface = c->interface;
+ m->member = v->method.member;
+ m->vtable = v;
+
+ r = hashmap_put(bus->vtable_methods, m, m);
+ if (r < 0) {
+ free(m);
+ goto fail;
+ }
+
+ break;
+ }
+
+ case _SD_BUS_VTABLE_PROPERTY:
+ case _SD_BUS_VTABLE_WRITABLE_PROPERTY: {
+ struct vtable_member *m;
+
+ if (!member_name_is_valid(v->property.member) ||
+ !signature_is_single(v->property.signature, false) ||
+ v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY ||
+ (v->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY && !(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))) {
+ r = -EINVAL;
+ goto fail;
+ }
+
+
+ m = new0(struct vtable_member, 1);
+ if (!m) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ m->parent = c;
+ m->path = n->path;
+ m->interface = c->interface;
+ m->member = v->property.member;
+ m->vtable = v;
+
+ r = hashmap_put(bus->vtable_properties, m, m);
+ if (r < 0) {
+ free(m);
+ goto fail;
+ }
+
+ break;
+ }
+
+ case _SD_BUS_VTABLE_SIGNAL:
+
+ if (!member_name_is_valid(v->signal.member) ||
+ !signature_is_single(v->signal.signature, false)) {
+ r = -EINVAL;
+ goto fail;
+ }
+
+ break;
+
+ default:
+ r = -EINVAL;
+ goto fail;
+ }
+ }
+
+ LIST_PREPEND(struct node_vtable, vtables, n->vtables, c);
+ return 0;
+
+fail:
+ if (c)
+ free_node_vtable(bus, c);
+
+ bus_node_gc(bus, n);
+ return 0;
+}
+
+static int remove_object_vtable_internal(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ bool fallback) {
+
+ struct node_vtable *c;
+ struct node *n;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!interface_name_is_valid(interface))
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ n = hashmap_get(bus->nodes, path);
+ if (!n)
+ return 0;
+
+ LIST_FOREACH(vtables, c, n->vtables)
+ if (streq(c->interface, interface) && c->is_fallback == fallback)
+ break;
+
+ if (!c)
+ return 0;
+
+ LIST_REMOVE(struct node_vtable, vtables, n->vtables, c);
+
+ free_node_vtable(bus, c);
+ return 1;
+}
+
+int sd_bus_add_object_vtable(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const sd_bus_vtable *vtable,
+ void *userdata) {
+
+ return add_object_vtable_internal(bus, path, interface, vtable, false, NULL, userdata);
+}
+
+int sd_bus_remove_object_vtable(
+ sd_bus *bus,
+ const char *path,
+ const char *interface) {
+
+ return remove_object_vtable_internal(bus, path, interface, false);
+}
+
+int sd_bus_add_fallback_vtable(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const sd_bus_vtable *vtable,
+ sd_bus_object_find_t find,
+ void *userdata) {
+
+ return add_object_vtable_internal(bus, path, interface, vtable, true, find, userdata);
+}
+
+int sd_bus_remove_fallback_vtable(
+ sd_bus *bus,
+ const char *path,
+ const char *interface) {
+
+ return remove_object_vtable_internal(bus, path, interface, true);
+}
+
+int sd_bus_add_node_enumerator(
+ sd_bus *bus,
+ const char *path,
+ sd_bus_node_enumerator_t callback,
+ void *userdata) {
+
+ struct node_enumerator *c;
+ struct node *n;
+ int r;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!callback)
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ n = bus_node_allocate(bus, path);
+ if (!n)
+ return -ENOMEM;
+
+ c = new0(struct node_enumerator, 1);
+ if (!c) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->node = n;
+ c->callback = callback;
+ c->userdata = userdata;
+
+ LIST_PREPEND(struct node_enumerator, enumerators, n->enumerators, c);
+ return 0;
+
+fail:
+ free(c);
+ bus_node_gc(bus, n);
+ return r;
+}
+
+int sd_bus_remove_node_enumerator(
+ sd_bus *bus,
+ const char *path,
+ sd_bus_node_enumerator_t callback,
+ void *userdata) {
+
+ struct node_enumerator *c;
+ struct node *n;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!callback)
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ n = hashmap_get(bus->nodes, path);
+ if (!n)
+ return 0;
+
+ LIST_FOREACH(enumerators, c, n->enumerators)
+ if (c->callback == callback && c->userdata == userdata)
+ break;
+
+ if (!c)
+ return 0;
+
+ LIST_REMOVE(struct node_enumerator, enumerators, n->enumerators, c);
+ free(c);
+
+ bus_node_gc(bus, n);
+
+ return 1;
+}
+
+static int emit_properties_changed_on_interface(
+ sd_bus *bus,
+ const char *prefix,
+ const char *path,
+ const char *interface,
+ bool require_fallback,
+ char **names) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ bool has_invalidating = false;
+ struct vtable_member key;
+ struct node_vtable *c;
+ struct node *n;
+ char **property;
+ void *u;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(interface);
+
+ n = hashmap_get(bus->nodes, prefix);
+ if (!n)
+ return 0;
+
+ LIST_FOREACH(vtables, c, n->vtables) {
+ if (require_fallback && !c->is_fallback)
+ continue;
+
+ if (streq(c->interface, interface))
+ break;
+
+ r = node_vtable_get_userdata(bus, path, c, &u);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ break;
+ }
+
+ if (!c)
+ return 0;
+
+ r = sd_bus_message_new_signal(bus, path, "org.freedesktop.DBus", "PropertiesChanged", &m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(m, "s", interface);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(m, 'a', "{sv}");
+ if (r < 0)
+ return r;
+
+ key.path = prefix;
+ key.interface = interface;
+
+ STRV_FOREACH(property, names) {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ struct vtable_member *v;
+
+ key.member = *property;
+ v = hashmap_get(bus->vtable_properties, &key);
+ if (!v)
+ return -ENOENT;
+
+ assert(c == v->parent);
+
+ if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))
+ return -EDOM;
+ if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY) {
+ has_invalidating = true;
+ continue;
+ }
+
+ r = sd_bus_message_open_container(m, 'e', "sv");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(m, "s", *n);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(m, 'v', v->vtable->property.signature);
+ if (r < 0)
+ return r;
+
+ r = v->vtable->property.get(bus, m->path, interface, *property, m, &error, u);
+ if (r < 0)
+ return r;
+
+ if (sd_bus_error_is_set(&error))
+ return bus_error_to_errno(&error);
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(m, 'a', "s");
+ if (r < 0)
+ return r;
+
+ if (has_invalidating) {
+ STRV_FOREACH(property, names) {
+ struct vtable_member *v;
+
+ key.member = *property;
+ assert_se(v = hashmap_get(bus->vtable_properties, &key));
+ assert(c == v->parent);
+
+ if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY))
+ continue;
+
+ r = sd_bus_message_append(m, "s", *property);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_send(bus, m, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+int sd_bus_emit_properties_changed_strv(sd_bus *bus, const char *path, const char *interface, char **names) {
+ size_t pl;
+ int r;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!interface_name_is_valid(interface))
+ return -EINVAL;
+
+ r = emit_properties_changed_on_interface(bus, path, path, interface, false, names);
+ if (r != 0)
+ return r;
+
+ pl = strlen(path);
+ if (pl > 1 ) {
+ char p[pl+1];
+
+ strcpy(p, path);
+ for (;;) {
+ char *e;
+
+ if (streq(p, "/"))
+ break;
+
+ e = strrchr(p, '/');
+ assert(e);
+ if (e == p)
+ *(e+1) = 0;
+ else
+ *e = 0;
+
+ r = emit_properties_changed_on_interface(bus, p, path, interface, true, names);
+ if (r != 0)
+ return r;
+ }
+ }
+
+ return -ENOENT;
+}
+
+int sd_bus_emit_properties_changed(sd_bus *bus, const char *path, const char *interface, const char *name, ...) {
+ _cleanup_strv_free_ char **names = NULL;
+ va_list ap;
+
+ va_start(ap, name);
+ names = strv_new_ap(name, ap);
+ va_end(ap);
+
+ if (!names)
+ return -ENOMEM;
+
+ return sd_bus_emit_properties_changed_strv(bus, path, interface, names);
+}
+
+int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interfaces, ...) {
+ return -ENOSYS;
+}
+
+int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interfaces, ...) {
+ return -ENOSYS;
+}
+
+int sd_bus_get_property(
+ sd_bus *bus,
+ const char *destination,
+ const char *path,
+ const char *interface,
+ const char *member,
+ sd_bus_error *error,
+ sd_bus_message **reply,
+ const char *type) {
+
+ sd_bus_message *rep = NULL;
+ int r;
+
+ if (interface && !interface_name_is_valid(interface))
+ return -EINVAL;
+ if (!member_name_is_valid(member))
+ return -EINVAL;
+ if (!signature_is_single(type, false))
+ return -EINVAL;
+ if (!reply)
+ return -EINVAL;
+
+ r = sd_bus_call_method(bus, destination, path, "org.freedesktop.DBus.Properties", "Get", error, &rep, "ss", strempty(interface), member);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_enter_container(rep, 'v', type);
+ if (r < 0) {
+ sd_bus_message_unref(rep);
+ return r;
+ }
+
+ *reply = rep;
+ return 0;
+}
+
+int sd_bus_set_property(
+ sd_bus *bus,
+ const char *destination,
+ const char *path,
+ const char *interface,
+ const char *member,
+ sd_bus_error *error,
+ const char *type, ...) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ va_list ap;
+ int r;
+
+ if (interface && !interface_name_is_valid(interface))
+ return -EINVAL;
+ if (!member_name_is_valid(member))
+ return -EINVAL;
+ if (!signature_is_single(type, false))
+ return -EINVAL;
+
+ r = sd_bus_message_new_method_call(bus, destination, path, "org.freedesktop.DBus.Properties", "Set", &m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(m, "ss", strempty(interface), member);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(m, 'v', type);
+ if (r < 0)
+ return r;
+
+ va_start(ap, type);
+ r = bus_message_append_ap(m, type, ap);
+ va_end(ap);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return r;
+
+ return sd_bus_send_with_reply_and_block(bus, m, 0, error, NULL);
+}
+
+int sd_bus_add_object_manager(sd_bus *bus, const char *path) {
+ struct node *n;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ n = bus_node_allocate(bus, path);
+ if (!n)
+ return -ENOMEM;
+
+ n->object_manager = true;
+ return 0;
+}
+
+int sd_bus_remove_object_manager(sd_bus *bus, const char *path) {
+ struct node *n;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ n = hashmap_get(bus->nodes, path);
+ if (!n)
+ return 0;
+
+ if (!n->object_manager)
+ return 0;
+
+ n->object_manager = false;
+ bus_node_gc(bus, n);
+ return 1;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-17 07:45:49 +0000