diff options
Diffstat (limited to 'src/machine/machined-dbus.c')
| -rw-r--r-- | src/machine/machined-dbus.c | 824 |
1 files changed, 824 insertions, 0 deletions
diff --git a/src/machine/machined-dbus.c b/src/machine/machined-dbus.c new file mode 100644 index 0000000000..a2e00d7102 --- /dev/null +++ b/src/machine/machined-dbus.c @@ -0,0 +1,824 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2011 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 <errno.h> +#include <string.h> +#include <unistd.h> +#include <pwd.h> + +#include <systemd/sd-id128.h> +#include <systemd/sd-messages.h> + +#include "machined.h" +#include "dbus-common.h" +#include "strv.h" +#include "mkdir.h" +#include "path-util.h" +#include "special.h" +#include "sleep-config.h" +#include "fileio-label.h" +#include "label.h" +#include "utf8.h" +#include "unit-name.h" +#include "bus-errors.h" +#include "virt.h" + +#define BUS_MANAGER_INTERFACE \ + " <interface name=\"org.freedesktop.machine1.Manager\">\n" \ + " <method name=\"GetMachine\">\n" \ + " <arg name=\"name\" type=\"s\" direction=\"in\"/>\n" \ + " <arg name=\"machine\" type=\"o\" direction=\"out\"/>\n" \ + " </method>\n" \ + " <method name=\"GetMachineByPID\">\n" \ + " <arg name=\"pid\" type=\"u\" direction=\"in\"/>\n" \ + " <arg name=\"machine\" type=\"o\" direction=\"out\"/>\n" \ + " </method>\n" \ + " <method name=\"ListMachines\">\n" \ + " <arg name=\"machines\" type=\"a(ssso)\" direction=\"out\"/>\n" \ + " </method>\n" \ + " <method name=\"CreateMachine\">\n" \ + " <arg name=\"name\" type=\"s\" direction=\"in\"/>\n" \ + " <arg name=\"id\" type=\"ay\" direction=\"in\"/>\n" \ + " <arg name=\"service\" type=\"s\" direction=\"in\"/>\n" \ + " <arg name=\"class\" type=\"s\" direction=\"in\"/>\n" \ + " <arg name=\"leader\" type=\"u\" direction=\"in\"/>\n" \ + " <arg name=\"root_directory\" type=\"s\" direction=\"in\"/>\n" \ + " <arg name=\"scope_properties\" type=\"a(sv)\" direction=\"in\"/>\n" \ + " <arg name=\"path\" type=\"o\" direction=\"out\"/>\n" \ + " </method>\n" \ + " <method name=\"KillMachine\">\n" \ + " <arg name=\"name\" type=\"s\" direction=\"in\"/>\n" \ + " <arg name=\"who\" type=\"s\" direction=\"in\"/>\n" \ + " <arg name=\"signal\" type=\"s\" direction=\"in\"/>\n" \ + " </method>\n" \ + " <method name=\"TerminateMachine\">\n" \ + " <arg name=\"id\" type=\"s\" direction=\"in\"/>\n" \ + " </method>\n" \ + " <signal name=\"MachineNew\">\n" \ + " <arg name=\"machine\" type=\"s\"/>\n" \ + " <arg name=\"path\" type=\"o\"/>\n" \ + " </signal>\n" \ + " <signal name=\"MachineRemoved\">\n" \ + " <arg name=\"machine\" type=\"s\"/>\n" \ + " <arg name=\"path\" type=\"o\"/>\n" \ + " </signal>\n" \ + " </interface>\n" + +#define INTROSPECTION_BEGIN \ + DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ + "<node>\n" \ + BUS_MANAGER_INTERFACE \ + BUS_PROPERTIES_INTERFACE \ + BUS_PEER_INTERFACE \ + BUS_INTROSPECTABLE_INTERFACE + +#define INTROSPECTION_END \ + "</node>\n" + +#define INTERFACES_LIST \ + BUS_GENERIC_INTERFACES_LIST \ + "org.freedesktop.machine1.Manager\0" + +static bool valid_machine_name(const char *p) { + size_t l; + + if (!filename_is_safe(p)) + return false; + + if (!ascii_is_valid(p)) + return false; + + l = strlen(p); + + if (l < 1 || l> 64) + return false; + + return true; +} + +static int bus_manager_create_machine(Manager *manager, DBusMessage *message) { + + const char *name, *service, *class, *slice, *root_directory; + _cleanup_free_ char *p = NULL; + DBusMessageIter iter, sub; + MachineClass c; + uint32_t leader; + sd_id128_t id; + Machine *m; + int n, r; + void *v; + + assert(manager); + assert(message); + + if (!dbus_message_iter_init(message, &iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) + return -EINVAL; + + dbus_message_iter_get_basic(&iter, &name); + + if (!valid_machine_name(name) || + !dbus_message_iter_next(&iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY || + dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_BYTE) + return -EINVAL; + + dbus_message_iter_recurse(&iter, &sub); + dbus_message_iter_get_fixed_array(&sub, &v, &n); + + if (n == 0) + id = SD_ID128_NULL; + else if (n == 16) + memcpy(&id, v, n); + else + return -EINVAL; + + if (!dbus_message_iter_next(&iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) + return -EINVAL; + + dbus_message_iter_get_basic(&iter, &service); + + if (!dbus_message_iter_next(&iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) + return -EINVAL; + + dbus_message_iter_get_basic(&iter, &class); + + if (isempty(class)) + c = _MACHINE_CLASS_INVALID; + else { + c = machine_class_from_string(class); + if (c < 0) + return -EINVAL; + } + + if (!dbus_message_iter_next(&iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32) + return -EINVAL; + + dbus_message_iter_get_basic(&iter, &leader); + if (!dbus_message_iter_next(&iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) + return -EINVAL; + + dbus_message_iter_get_basic(&iter, &slice); + if (!(isempty(slice) || (unit_name_is_valid(slice, false) && endswith(slice, ".slice"))) || + !dbus_message_iter_next(&iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) + return -EINVAL; + + dbus_message_iter_get_basic(&iter, &root_directory); + + if (!(isempty(root_directory) || path_is_absolute(root_directory))) + return -EINVAL; + + if (hashmap_get(manager->machines, name)) + return -EEXIST; + + if (leader <= 0) { + leader = bus_get_unix_process_id(manager->bus, dbus_message_get_sender(message), NULL); + if (leader == 0) + return -EINVAL; + } + + r = manager_add_machine(manager, name, &m); + if (r < 0) + goto fail; + + m->leader = leader; + m->class = c; + m->id = id; + + if (!isempty(service)) { + m->service = strdup(service); + if (!m->service) { + r = -ENOMEM; + goto fail; + } + } + + if (!isempty(root_directory)) { + m->root_directory = strdup(root_directory); + if (!m->root_directory) { + r = -ENOMEM; + goto fail; + } + } + + r = machine_start(m); + if (r < 0) + goto fail; + + m->create_message = dbus_message_ref(message); + + return 0; + +fail: + if (m) + machine_add_to_gc_queue(m); + + return r; +} + +static DBusHandlerResult manager_message_handler( + DBusConnection *connection, + DBusMessage *message, + void *userdata) { + + Manager *m = userdata; + + DBusError error; + _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; + int r; + + assert(connection); + assert(message); + assert(m); + + dbus_error_init(&error); + + if (dbus_message_is_method_call(message, "org.freedesktop.machine1.Manager", "GetMachine")) { + Machine *machine; + const char *name; + char *p; + bool b; + + if (!dbus_message_get_args( + message, + &error, + DBUS_TYPE_STRING, &name, + DBUS_TYPE_INVALID)) + return bus_send_error_reply(connection, message, &error, -EINVAL); + + machine = hashmap_get(m->machines, name); + if (!machine) + return bus_send_error_reply(connection, message, &error, -ENOENT); + + reply = dbus_message_new_method_return(message); + if (!reply) + goto oom; + + p = machine_bus_path(machine); + if (!p) + goto oom; + + b = dbus_message_append_args( + reply, + DBUS_TYPE_OBJECT_PATH, &p, + DBUS_TYPE_INVALID); + free(p); + + if (!b) + goto oom; + + } else if (dbus_message_is_method_call(message, "org.freedesktop.machine1.Manager", "GetMachineByPID")) { + uint32_t pid; + char *p; + Machine *machine; + bool b; + + if (!dbus_message_get_args( + message, + &error, + DBUS_TYPE_UINT32, &pid, + DBUS_TYPE_INVALID)) + return bus_send_error_reply(connection, message, &error, -EINVAL); + + r = manager_get_machine_by_pid(m, pid, &machine); + if (r <= 0) + return bus_send_error_reply(connection, message, NULL, r < 0 ? r : -ENOENT); + + reply = dbus_message_new_method_return(message); + if (!reply) + goto oom; + + p = machine_bus_path(machine); + if (!p) + goto oom; + + b = dbus_message_append_args( + reply, + DBUS_TYPE_OBJECT_PATH, &p, + DBUS_TYPE_INVALID); + free(p); + + if (!b) + goto oom; + + } else if (dbus_message_is_method_call(message, "org.freedesktop.machine1.Manager", "ListMachines")) { + Machine *machine; + Iterator i; + DBusMessageIter iter, sub; + + reply = dbus_message_new_method_return(message); + if (!reply) + goto oom; + + dbus_message_iter_init_append(reply, &iter); + + if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ssso)", &sub)) + goto oom; + + HASHMAP_FOREACH(machine, m->machines, i) { + _cleanup_free_ char *p = NULL; + DBusMessageIter sub2; + const char *class; + + if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2)) + goto oom; + + p = machine_bus_path(machine); + if (!p) + goto oom; + + class = strempty(machine_class_to_string(machine->class)); + + if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &machine->name) || + !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &class) || + !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &machine->service) || + !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) { + free(p); + goto oom; + } + + 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.machine1.Manager", "CreateMachine")) { + + r = bus_manager_create_machine(m, message); + if (r < 0) + return bus_send_error_reply(connection, message, NULL, r); + + } else if (dbus_message_is_method_call(message, "org.freedesktop.machine1.Manager", "KillMachine")) { + const char *swho; + int32_t signo; + KillWho who; + const char *name; + Machine *machine; + + if (!dbus_message_get_args( + message, + &error, + DBUS_TYPE_STRING, &name, + DBUS_TYPE_STRING, &swho, + DBUS_TYPE_INT32, &signo, + DBUS_TYPE_INVALID)) + return bus_send_error_reply(connection, message, &error, -EINVAL); + + if (isempty(swho)) + who = KILL_ALL; + else { + who = kill_who_from_string(swho); + if (who < 0) + return bus_send_error_reply(connection, message, &error, -EINVAL); + } + + if (signo <= 0 || signo >= _NSIG) + return bus_send_error_reply(connection, message, &error, -EINVAL); + + machine = hashmap_get(m->machines, name); + if (!machine) + return bus_send_error_reply(connection, message, &error, -ENOENT); + + r = machine_kill(machine, who, signo); + if (r < 0) + return bus_send_error_reply(connection, message, NULL, r); + + reply = dbus_message_new_method_return(message); + if (!reply) + goto oom; + + } else if (dbus_message_is_method_call(message, "org.freedesktop.machine1.Manager", "TerminateMachine")) { + const char *name; + Machine *machine; + + if (!dbus_message_get_args( + message, + &error, + DBUS_TYPE_STRING, &name, + DBUS_TYPE_INVALID)) + return bus_send_error_reply(connection, message, &error, -EINVAL); + + machine = hashmap_get(m->machines, name); + if (!machine) + return bus_send_error_reply(connection, message, &error, -ENOENT); + + r = machine_stop(machine); + if (r < 0) + return bus_send_error_reply(connection, message, NULL, r); + + reply = dbus_message_new_method_return(message); + if (!reply) + goto oom; + + } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) { + char *introspection = NULL; + FILE *f; + Iterator i; + Machine *machine; + size_t size; + char *p; + + reply = dbus_message_new_method_return(message); + if (!reply) + 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. */ + + f = open_memstream(&introspection, &size); + if (!f) + goto oom; + + fputs(INTROSPECTION_BEGIN, f); + + HASHMAP_FOREACH(machine, m->machines, i) { + p = bus_path_escape(machine->name); + + if (p) { + fprintf(f, "<node name=\"machine/%s\"/>", p); + free(p); + } + } + + 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 + return bus_default_message_handler(connection, message, NULL, INTERFACES_LIST, NULL); + + if (reply) { + if (!bus_maybe_send_reply(connection, message, reply)) + goto oom; + } + + return DBUS_HANDLER_RESULT_HANDLED; + +oom: + dbus_error_free(&error); + + return DBUS_HANDLER_RESULT_NEED_MEMORY; +} + +const DBusObjectPathVTable bus_manager_vtable = { + .message_function = manager_message_handler +}; + +DBusHandlerResult bus_message_filter( + DBusConnection *connection, + DBusMessage *message, + void *userdata) { + + Manager *m = userdata; + DBusError error; + + assert(m); + assert(connection); + assert(message); + + dbus_error_init(&error); + + log_debug("Got message: %s %s %s", strna(dbus_message_get_sender(message)), strna(dbus_message_get_interface(message)), strna(dbus_message_get_member(message))); + + if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) { + const char *path, *result, *unit; + Machine *mm; + uint32_t id; + + if (!dbus_message_get_args(message, &error, + DBUS_TYPE_UINT32, &id, + DBUS_TYPE_OBJECT_PATH, &path, + DBUS_TYPE_STRING, &unit, + DBUS_TYPE_STRING, &result, + DBUS_TYPE_INVALID)) { + log_error("Failed to parse JobRemoved message: %s", bus_error_message(&error)); + goto finish; + } + + + mm = hashmap_get(m->machine_units, unit); + if (mm) { + if (streq_ptr(path, mm->scope_job)) { + free(mm->scope_job); + mm->scope_job = NULL; + + if (mm->started) { + if (streq(result, "done")) + machine_send_create_reply(mm, NULL); + else { + dbus_set_error(&error, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result); + machine_send_create_reply(mm, &error); + } + } + } + + machine_add_to_gc_queue(mm); + } + + } else if (dbus_message_is_signal(message, "org.freedesktop.DBus.Properties", "PropertiesChanged")) { + + _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; + _cleanup_free_ char *unit = NULL; + const char *path; + + path = dbus_message_get_path(message); + if (!path) + goto finish; + + unit_name_from_dbus_path(path, &unit); + if (unit) { + Machine *mm; + + mm = hashmap_get(m->machine_units, unit); + if (mm) + machine_add_to_gc_queue(mm); + } + } + +finish: + dbus_error_free(&error); + + return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; +} + +int manager_start_scope( + Manager *manager, + const char *scope, + pid_t pid, + const char *slice, + const char *description, + DBusError *error, + char **job) { + + _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL; + DBusMessageIter iter, sub, sub2, sub3, sub4; + const char *timeout_stop_property = "TimeoutStopUSec"; + const char *pids_property = "PIDs"; + uint64_t timeout = 500 * USEC_PER_MSEC; + const char *fail = "fail"; + uint32_t u; + + assert(manager); + assert(scope); + assert(pid > 1); + + if (!slice) + slice = ""; + + m = dbus_message_new_method_call( + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "StartTransientUnit"); + if (!m) + return log_oom(); + + dbus_message_iter_init_append(m, &iter); + + if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &scope) || + !dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &fail) || + !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(sv)", &sub)) + return log_oom(); + + if (!isempty(slice)) { + const char *slice_property = "Slice"; + + if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) || + !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &slice_property) || + !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, "s", &sub3) || + !dbus_message_iter_append_basic(&sub3, DBUS_TYPE_STRING, &slice) || + !dbus_message_iter_close_container(&sub2, &sub3) || + !dbus_message_iter_close_container(&sub, &sub2)) + return log_oom(); + } + + if (!isempty(description)) { + const char *description_property = "Description"; + + if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) || + !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description_property) || + !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, "s", &sub3) || + !dbus_message_iter_append_basic(&sub3, DBUS_TYPE_STRING, &description) || + !dbus_message_iter_close_container(&sub2, &sub3) || + !dbus_message_iter_close_container(&sub, &sub2)) + return log_oom(); + } + + /* cgroup empty notification is not available in containers + * currently. To make this less problematic, let's shorten the + * stop timeout for sessions, so that we don't wait + * forever. */ + + if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) || + !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &timeout_stop_property) || + !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, "t", &sub3) || + !dbus_message_iter_append_basic(&sub3, DBUS_TYPE_UINT64, &timeout) || + !dbus_message_iter_close_container(&sub2, &sub3) || + !dbus_message_iter_close_container(&sub, &sub2)) + return log_oom(); + + u = pid; + if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) || + !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &pids_property) || + !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, "au", &sub3) || + !dbus_message_iter_open_container(&sub3, DBUS_TYPE_ARRAY, "u", &sub4) || + !dbus_message_iter_append_basic(&sub4, DBUS_TYPE_UINT32, &u) || + !dbus_message_iter_close_container(&sub3, &sub4) || + !dbus_message_iter_close_container(&sub2, &sub3) || + !dbus_message_iter_close_container(&sub, &sub2) || + !dbus_message_iter_close_container(&iter, &sub)) + return log_oom(); + + reply = dbus_connection_send_with_reply_and_block(manager->bus, m, -1, error); + if (!reply) + return -EIO; + + if (job) { + const char *j; + char *copy; + + if (!dbus_message_get_args(reply, error, DBUS_TYPE_OBJECT_PATH, &j, DBUS_TYPE_INVALID)) + return -EIO; + + copy = strdup(j); + if (!copy) + return -ENOMEM; + + *job = copy; + } + + return 0; +} + +int manager_stop_unit(Manager *manager, const char *unit, DBusError *error, char **job) { + _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; + const char *fail = "fail"; + int r; + + assert(manager); + assert(unit); + + r = bus_method_call_with_reply( + manager->bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "StopUnit", + &reply, + error, + DBUS_TYPE_STRING, &unit, + DBUS_TYPE_STRING, &fail, + DBUS_TYPE_INVALID); + if (r < 0) { + log_error("Failed to stop unit %s: %s", unit, bus_error(error, r)); + return r; + } + + if (job) { + const char *j; + char *copy; + + if (!dbus_message_get_args(reply, error, + DBUS_TYPE_OBJECT_PATH, &j, + DBUS_TYPE_INVALID)) { + log_error("Failed to parse reply."); + return -EIO; + } + + copy = strdup(j); + if (!copy) + return -ENOMEM; + + *job = copy; + } + + return 0; +} + +int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, DBusError *error) { + _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; + const char *w; + int r; + + assert(manager); + assert(unit); + + w = who == KILL_LEADER ? "process" : "cgroup"; + assert_cc(sizeof(signo) == sizeof(int32_t)); + + r = bus_method_call_with_reply( + manager->bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "KillUnit", + &reply, + error, + DBUS_TYPE_STRING, &unit, + DBUS_TYPE_STRING, &w, + DBUS_TYPE_INT32, &signo, + DBUS_TYPE_INVALID); + if (r < 0) { + log_error("Failed to stop unit %s: %s", unit, bus_error(error, r)); + return r; + } + + return 0; +} + +int manager_unit_is_active(Manager *manager, const char *unit) { + + const char *interface = "org.freedesktop.systemd1.Unit"; + const char *property = "ActiveState"; + _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; + _cleanup_free_ char *path = NULL; + DBusMessageIter iter, sub; + const char *state; + DBusError error; + int r; + + assert(manager); + assert(unit); + + dbus_error_init(&error); + + path = unit_dbus_path_from_name(unit); + if (!path) + return -ENOMEM; + + r = bus_method_call_with_reply( + manager->bus, + "org.freedesktop.systemd1", + path, + "org.freedesktop.DBus.Properties", + "Get", + &reply, + &error, + DBUS_TYPE_STRING, &interface, + DBUS_TYPE_STRING, &property, + DBUS_TYPE_INVALID); + + if (r < 0) { + log_error("Failed to query ActiveState: %s", bus_error(&error, r)); + dbus_error_free(&error); + return r; + } + + if (!dbus_message_iter_init(reply, &iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) { + log_error("Failed to parse reply."); + return -EINVAL; + } + + dbus_message_iter_recurse(&iter, &sub); + if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) { + log_error("Failed to parse reply."); + return -EINVAL; + } + + dbus_message_iter_get_basic(&sub, &state); + + return !streq(state, "inactive") && !streq(state, "failed"); +} |