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-rw-r--r--src/dbus-manager.c657
1 files changed, 657 insertions, 0 deletions
diff --git a/src/dbus-manager.c b/src/dbus-manager.c
new file mode 100644
index 000000000..90ab8d1a0
--- /dev/null
+++ b/src/dbus-manager.c
@@ -0,0 +1,657 @@
+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd 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 2 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+
+#include "dbus.h"
+#include "log.h"
+#include "dbus-manager.h"
+#include "strv.h"
+
+#define INTROSPECTION_BEGIN \
+ DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
+ "<node>" \
+ " <interface name=\"org.freedesktop.systemd1.Manager\">" \
+ " <method name=\"GetUnit\">" \
+ " <arg name=\"name\" type=\"s\" direction=\"in\"/>" \
+ " <arg name=\"unit\" type=\"o\" direction=\"out\"/>" \
+ " </method>" \
+ " <method name=\"LoadUnit\">" \
+ " <arg name=\"name\" type=\"s\" direction=\"in\"/>" \
+ " <arg name=\"unit\" type=\"o\" direction=\"out\"/>" \
+ " </method>" \
+ " <method name=\"GetJob\">" \
+ " <arg name=\"id\" type=\"u\" direction=\"in\"/>" \
+ " <arg name=\"job\" type=\"o\" direction=\"out\"/>" \
+ " </method>" \
+ " <method name=\"ClearJobs\"/>" \
+ " <method name=\"ListUnits\">" \
+ " <arg name=\"units\" type=\"a(sssssouso)\" direction=\"out\"/>" \
+ " </method>" \
+ " <method name=\"ListJobs\">" \
+ " <arg name=\"jobs\" type=\"a(usssoo)\" direction=\"out\"/>" \
+ " </method>" \
+ " <method name=\"Subscribe\"/>" \
+ " <method name=\"Unsubscribe\"/>" \
+ " <method name=\"Dump\"/>" \
+ " <method name=\"CreateSnapshot\">" \
+ " <arg name=\"name\" type=\"s\" direction=\"in\"/>" \
+ " <arg nane=\"cleanup\" type=\"b\" direction=\"in\"/>" \
+ " <arg name=\"unit\" type=\"o\" direction=\"out\"/>" \
+ " </method>" \
+ " <method name=\"Reload\"/>" \
+ " <method name=\"Reexecute\"/>" \
+ " <method name=\"Exit\"/>" \
+ " <method name=\"SetEnvironment\">" \
+ " <arg name=\"names\" type=\"as\" direction=\"in\"/>" \
+ " </method>" \
+ " <method name=\"UnsetEnvironment\">" \
+ " <arg name=\"names\" type=\"as\" direction=\"in\"/>" \
+ " </method>" \
+ " <signal name=\"UnitNew\">" \
+ " <arg name=\"id\" type=\"s\"/>" \
+ " <arg name=\"unit\" type=\"o\"/>" \
+ " </signal>" \
+ " <signal name=\"UnitRemoved\">" \
+ " <arg name=\"id\" type=\"s\"/>" \
+ " <arg name=\"unit\" type=\"o\"/>" \
+ " </signal>" \
+ " <signal name=\"JobNew\">" \
+ " <arg name=\"id\" type=\"u\"/>" \
+ " <arg name=\"job\" type=\"o\"/>" \
+ " </signal>" \
+ " <signal name=\"JobRemoved\">" \
+ " <arg name=\"id\" type=\"u\"/>" \
+ " <arg name=\"job\" type=\"o\"/>" \
+ " </signal>" \
+ " <property name=\"Version\" type=\"s\" access=\"read\"/>" \
+ " <property name=\"RunningAs\" type=\"s\" access=\"read\"/>" \
+ " <property name=\"BootTimestamp\" type=\"t\" access=\"read\"/>" \
+ " <property name=\"LogLevel\" type=\"s\" access=\"read\"/>" \
+ " <property name=\"LogTarget\" type=\"s\" access=\"read\"/>" \
+ " <property name=\"NNames\" type=\"u\" access=\"read\"/>" \
+ " <property name=\"NJobs\" type=\"u\" access=\"read\"/>" \
+ " <property name=\"Environment\" type=\"as\" access=\"read\"/>" \
+ " </interface>" \
+ BUS_PROPERTIES_INTERFACE \
+ BUS_INTROSPECTABLE_INTERFACE
+
+#define INTROSPECTION_END \
+ "</node>"
+
+static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
+
+static int bus_manager_append_log_target(Manager *m, DBusMessageIter *i, const char *property, void *data) {
+ const char *t;
+
+ assert(m);
+ assert(i);
+ assert(property);
+
+ t = log_target_to_string(log_get_target());
+
+ if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int bus_manager_append_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
+ const char *t;
+
+ assert(m);
+ assert(i);
+ assert(property);
+
+ t = log_level_to_string(log_get_max_level());
+
+ if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int bus_manager_append_n_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
+ uint32_t u;
+
+ assert(m);
+ assert(i);
+ assert(property);
+
+ u = hashmap_size(m->units);
+
+ if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char *property, void *data) {
+ uint32_t u;
+
+ assert(m);
+ assert(i);
+ assert(property);
+
+ u = hashmap_size(m->jobs);
+
+ if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
+ Manager *m = data;
+
+ const BusProperty properties[] = {
+ { "org.freedesktop.systemd1.Manager", "Version", bus_property_append_string, "s", PACKAGE_STRING },
+ { "org.freedesktop.systemd1.Manager", "RunningAs", bus_manager_append_running_as, "s", &m->running_as },
+ { "org.freedesktop.systemd1.Manager", "BootTimestamp", bus_property_append_uint64, "t", &m->boot_timestamp },
+ { "org.freedesktop.systemd1.Manager", "LogLevel", bus_manager_append_log_level, "s", NULL },
+ { "org.freedesktop.systemd1.Manager", "LogTarget", bus_manager_append_log_target, "s", NULL },
+ { "org.freedesktop.systemd1.Manager", "NNames", bus_manager_append_n_names, "u", NULL },
+ { "org.freedesktop.systemd1.Manager", "NJobs", bus_manager_append_n_jobs, "u", NULL },
+ { "org.freedesktop.systemd1.Manager", "Environment", bus_property_append_strv, "as", m->environment },
+ { NULL, NULL, NULL, NULL, NULL }
+ };
+
+ int r;
+ DBusError error;
+ DBusMessage *reply = NULL;
+ char * path = NULL;
+
+ assert(connection);
+ assert(message);
+ assert(m);
+
+ dbus_error_init(&error);
+
+ log_debug("Got D-Bus request: %s.%s() on %s",
+ dbus_message_get_interface(message),
+ dbus_message_get_member(message),
+ dbus_message_get_path(message));
+
+ if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
+ const char *name;
+ Unit *u;
+
+ if (!dbus_message_get_args(
+ message,
+ &error,
+ DBUS_TYPE_STRING, &name,
+ DBUS_TYPE_INVALID))
+ return bus_send_error_reply(m, message, &error, -EINVAL);
+
+ if (!(u = manager_get_unit(m, name)))
+ return bus_send_error_reply(m, message, NULL, -ENOENT);
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ if (!(path = unit_dbus_path(u)))
+ goto oom;
+
+ if (!dbus_message_append_args(
+ reply,
+ DBUS_TYPE_OBJECT_PATH, &path,
+ DBUS_TYPE_INVALID))
+ goto oom;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
+ const char *name;
+ Unit *u;
+
+ if (!dbus_message_get_args(
+ message,
+ &error,
+ DBUS_TYPE_STRING, &name,
+ DBUS_TYPE_INVALID))
+ return bus_send_error_reply(m, message, &error, -EINVAL);
+
+ if ((r = manager_load_unit(m, name, NULL, &u)) < 0)
+ return bus_send_error_reply(m, message, NULL, r);
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ if (!(path = unit_dbus_path(u)))
+ goto oom;
+
+ if (!dbus_message_append_args(
+ reply,
+ DBUS_TYPE_OBJECT_PATH, &path,
+ DBUS_TYPE_INVALID))
+ goto oom;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
+ uint32_t id;
+ Job *j;
+
+ if (!dbus_message_get_args(
+ message,
+ &error,
+ DBUS_TYPE_UINT32, &id,
+ DBUS_TYPE_INVALID))
+ return bus_send_error_reply(m, message, &error, -EINVAL);
+
+ if (!(j = manager_get_job(m, id)))
+ return bus_send_error_reply(m, message, NULL, -ENOENT);
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ if (!(path = job_dbus_path(j)))
+ goto oom;
+
+ if (!dbus_message_append_args(
+ reply,
+ DBUS_TYPE_OBJECT_PATH, &path,
+ DBUS_TYPE_INVALID))
+ goto oom;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
+
+ manager_clear_jobs(m);
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
+ DBusMessageIter iter, sub;
+ Iterator i;
+ Unit *u;
+ const char *k;
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ dbus_message_iter_init_append(reply, &iter);
+
+ if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(sssssouso)", &sub))
+ goto oom;
+
+ HASHMAP_FOREACH_KEY(u, k, m->units, i) {
+ char *u_path, *j_path;
+ const char *description, *load_state, *active_state, *sub_state, *job_type;
+ DBusMessageIter sub2;
+ uint32_t job_id;
+
+ if (k != u->meta.id)
+ continue;
+
+ if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
+ goto oom;
+
+ description = unit_description(u);
+ load_state = unit_load_state_to_string(u->meta.load_state);
+ active_state = unit_active_state_to_string(unit_active_state(u));
+ sub_state = unit_sub_state_to_string(u);
+
+ if (!(u_path = unit_dbus_path(u)))
+ goto oom;
+
+ if (u->meta.job) {
+ job_id = (uint32_t) u->meta.job->id;
+
+ if (!(j_path = job_dbus_path(u->meta.job))) {
+ free(u_path);
+ goto oom;
+ }
+
+ job_type = job_type_to_string(u->meta.job->type);
+ } else {
+ job_id = 0;
+ j_path = u_path;
+ job_type = "";
+ }
+
+ if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &job_type) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
+ free(u_path);
+ if (u->meta.job)
+ free(j_path);
+ goto oom;
+ }
+
+ free(u_path);
+ if (u->meta.job)
+ free(j_path);
+
+ if (!dbus_message_iter_close_container(&sub, &sub2))
+ goto oom;
+ }
+
+ if (!dbus_message_iter_close_container(&iter, &sub))
+ goto oom;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
+ DBusMessageIter iter, sub;
+ Iterator i;
+ Job *j;
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ dbus_message_iter_init_append(reply, &iter);
+
+ if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
+ goto oom;
+
+ HASHMAP_FOREACH(j, m->jobs, i) {
+ char *u_path, *j_path;
+ const char *state, *type;
+ uint32_t id;
+ DBusMessageIter sub2;
+
+ if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
+ goto oom;
+
+ id = (uint32_t) j->id;
+ state = job_state_to_string(j->state);
+ type = job_type_to_string(j->type);
+
+ if (!(j_path = job_dbus_path(j)))
+ goto oom;
+
+ if (!(u_path = unit_dbus_path(j->unit))) {
+ free(j_path);
+ goto oom;
+ }
+
+ if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
+ free(j_path);
+ free(u_path);
+ goto oom;
+ }
+
+ free(j_path);
+ free(u_path);
+
+ if (!dbus_message_iter_close_container(&sub, &sub2))
+ goto oom;
+ }
+
+ if (!dbus_message_iter_close_container(&iter, &sub))
+ goto oom;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
+ char *client;
+
+ if (!(client = strdup(dbus_message_get_sender(message))))
+ goto oom;
+
+ r = set_put(m->subscribed, client);
+
+ if (r < 0)
+ return bus_send_error_reply(m, message, NULL, r);
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
+ char *client;
+
+ if (!(client = set_remove(m->subscribed, (char*) dbus_message_get_sender(message))))
+ return bus_send_error_reply(m, message, NULL, -ENOENT);
+
+ free(client);
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
+ FILE *f;
+ char *dump = NULL;
+ size_t size;
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ if (!(f = open_memstream(&dump, &size)))
+ goto oom;
+
+ manager_dump_units(m, f, NULL);
+ manager_dump_jobs(m, f, NULL);
+
+ if (ferror(f)) {
+ fclose(f);
+ free(dump);
+ goto oom;
+ }
+
+ fclose(f);
+
+ if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
+ free(dump);
+ goto oom;
+ }
+
+ free(dump);
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
+ const char *name;
+ dbus_bool_t cleanup;
+ Snapshot *s;
+
+ if (!dbus_message_get_args(
+ message,
+ &error,
+ DBUS_TYPE_STRING, &name,
+ DBUS_TYPE_BOOLEAN, &cleanup,
+ DBUS_TYPE_INVALID))
+ return bus_send_error_reply(m, message, &error, -EINVAL);
+
+ if (name && name[0] == 0)
+ name = NULL;
+
+ if ((r = snapshot_create(m, name, cleanup, &s)) < 0)
+ return bus_send_error_reply(m, message, NULL, r);
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ if (!(path = unit_dbus_path(UNIT(s))))
+ goto oom;
+
+ if (!dbus_message_append_args(
+ reply,
+ DBUS_TYPE_OBJECT_PATH, &path,
+ DBUS_TYPE_INVALID))
+ goto oom;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
+ char *introspection = NULL;
+ FILE *f;
+ Iterator i;
+ Unit *u;
+ Job *j;
+ const char *k;
+ size_t size;
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ /* We roll our own introspection code here, instead of
+ * relying on bus_default_message_handler() because we
+ * need to generate our introspection string
+ * dynamically. */
+
+ if (!(f = open_memstream(&introspection, &size)))
+ goto oom;
+
+ fputs(INTROSPECTION_BEGIN, f);
+
+ HASHMAP_FOREACH_KEY(u, k, m->units, i) {
+ char *p;
+
+ if (k != u->meta.id)
+ continue;
+
+ if (!(p = bus_path_escape(k))) {
+ fclose(f);
+ free(introspection);
+ goto oom;
+ }
+
+ fprintf(f, "<node name=\"unit/%s\"/>", p);
+ free(p);
+ }
+
+ HASHMAP_FOREACH(j, m->jobs, i)
+ fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
+
+ fputs(INTROSPECTION_END, f);
+
+ if (ferror(f)) {
+ fclose(f);
+ free(introspection);
+ goto oom;
+ }
+
+ fclose(f);
+
+ if (!introspection)
+ goto oom;
+
+ if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
+ free(introspection);
+ goto oom;
+ }
+
+ free(introspection);
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
+
+ assert(!m->queued_message);
+
+ /* Instead of sending the reply back right away, we
+ * just remember that we need to and then send it
+ * after the reload is finished. That way the caller
+ * knows when the reload finished. */
+
+ if (!(m->queued_message = dbus_message_new_method_return(message)))
+ goto oom;
+
+ m->exit_code = MANAGER_RELOAD;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ m->exit_code = MANAGER_REEXECUTE;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
+
+ if (m->running_as == MANAGER_INIT)
+ return bus_send_error_reply(m, message, NULL, -ENOTSUP);
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ m->exit_code = MANAGER_EXIT;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
+ char **l = NULL, **e = NULL;
+
+ if ((r = bus_parse_strv(message, &l)) < 0) {
+ if (r == -ENOMEM)
+ goto oom;
+
+ return bus_send_error_reply(m, message, NULL, r);
+ }
+
+ e = strv_env_merge(m->environment, l, NULL);
+ strv_free(l);
+
+ if (!e)
+ goto oom;
+
+ if (!(reply = dbus_message_new_method_return(message))) {
+ strv_free(e);
+ goto oom;
+ }
+
+ strv_free(m->environment);
+ m->environment = e;
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
+ char **l = NULL, **e = NULL;
+
+ if ((r = bus_parse_strv(message, &l)) < 0) {
+ if (r == -ENOMEM)
+ goto oom;
+
+ return bus_send_error_reply(m, message, NULL, r);
+ }
+
+ e = strv_env_delete(m->environment, l, NULL);
+ strv_free(l);
+
+ if (!e)
+ goto oom;
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ strv_free(m->environment);
+ m->environment = e;
+
+ } else
+ return bus_default_message_handler(m, message, NULL, properties);
+
+ free(path);
+
+ if (reply) {
+ if (!dbus_connection_send(connection, reply, NULL))
+ goto oom;
+
+ dbus_message_unref(reply);
+ }
+
+ return DBUS_HANDLER_RESULT_HANDLED;
+
+oom:
+ free(path);
+
+ if (reply)
+ dbus_message_unref(reply);
+
+ dbus_error_free(&error);
+
+ return DBUS_HANDLER_RESULT_NEED_MEMORY;
+}
+
+const DBusObjectPathVTable bus_manager_vtable = {
+ .message_function = bus_manager_message_handler
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-24 01:02:34 +0000