/*-*- 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 . ***/ #include #include #include #include #include #include #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 \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" #define INTROSPECTION_BEGIN \ DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ "\n" \ BUS_MANAGER_INTERFACE \ BUS_PROPERTIES_INTERFACE \ BUS_PEER_INTERFACE \ BUS_INTROSPECTABLE_INTERFACE #define INTROSPECTION_END \ "\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, *root_directory; 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, &root_directory); if (!(isempty(root_directory) || path_is_absolute(root_directory))) return -EINVAL; if (!dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY || dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT) return -EINVAL; dbus_message_iter_recurse(&iter, &sub); 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, &sub); 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, "", 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); } } else machine_save(mm); } machine_add_to_gc_queue(mm); } } else if (dbus_message_is_signal(message, "org.freedesktop.DBus.Properties", "PropertiesChanged")) { _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); } } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) { const char *path, *unit; Machine *mm; if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &unit, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) { log_error("Failed to parse UnitRemoved message: %s", bus_error_message(&error)); goto finish; } mm = hashmap_get(m->machine_units, unit); if (mm) machine_add_to_gc_queue(mm); } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "Reloading")) { dbus_bool_t b; if (!dbus_message_get_args(message, &error, DBUS_TYPE_BOOLEAN, &b, DBUS_TYPE_INVALID)) { log_error("Failed to parse Reloading message: %s", bus_error_message(&error)); goto finish; } /* systemd finished reloading, let's recheck all our machines */ if (!b) { Machine *mm; Iterator i; log_debug("System manager has been reloaded, rechecking machines..."); HASHMAP_FOREACH(mm, m->machines, i) machine_add_to_gc_queue(mm); } } finish: dbus_error_free(&error); return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; } static int copy_many_fields(DBusMessageIter *dest, DBusMessageIter *src); static int copy_one_field(DBusMessageIter *dest, DBusMessageIter *src) { int type, r; type = dbus_message_iter_get_arg_type(src); switch (type) { case DBUS_TYPE_STRUCT: { DBusMessageIter dest_sub, src_sub; dbus_message_iter_recurse(src, &src_sub); if (!dbus_message_iter_open_container(dest, DBUS_TYPE_STRUCT, NULL, &dest_sub)) return log_oom(); r = copy_many_fields(&dest_sub, &src_sub); if (r < 0) return r; if (!dbus_message_iter_close_container(dest, &dest_sub)) return log_oom(); return 0; } case DBUS_TYPE_ARRAY: { DBusMessageIter dest_sub, src_sub; dbus_message_iter_recurse(src, &src_sub); if (!dbus_message_iter_open_container(dest, DBUS_TYPE_ARRAY, dbus_message_iter_get_signature(&src_sub), &dest_sub)) return log_oom(); r = copy_many_fields(&dest_sub, &src_sub); if (r < 0) return r; if (!dbus_message_iter_close_container(dest, &dest_sub)) return log_oom(); return 0; } case DBUS_TYPE_VARIANT: { DBusMessageIter dest_sub, src_sub; dbus_message_iter_recurse(src, &src_sub); if (!dbus_message_iter_open_container(dest, DBUS_TYPE_VARIANT, dbus_message_iter_get_signature(&src_sub), &dest_sub)) return log_oom(); r = copy_one_field(&dest_sub, &src_sub); if (r < 0) return r; if (!dbus_message_iter_close_container(dest, &dest_sub)) return log_oom(); return 0; } case DBUS_TYPE_STRING: case DBUS_TYPE_OBJECT_PATH: case DBUS_TYPE_BYTE: case DBUS_TYPE_BOOLEAN: case DBUS_TYPE_UINT16: case DBUS_TYPE_INT16: case DBUS_TYPE_UINT32: case DBUS_TYPE_INT32: case DBUS_TYPE_UINT64: case DBUS_TYPE_INT64: case DBUS_TYPE_DOUBLE: case DBUS_TYPE_SIGNATURE: { const void *p; dbus_message_iter_get_basic(src, &p); dbus_message_iter_append_basic(dest, type, &p); return 0; } default: return -EINVAL; } } static int copy_many_fields(DBusMessageIter *dest, DBusMessageIter *src) { int r; assert(dest); assert(src); while (dbus_message_iter_get_arg_type(src) != DBUS_TYPE_INVALID) { r = copy_one_field(dest, src); if (r < 0) return r; dbus_message_iter_next(src); } return 0; } int manager_start_scope( Manager *manager, const char *scope, pid_t pid, const char *slice, const char *description, DBusMessageIter *more_properties, 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; int r; 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)) return log_oom(); if (more_properties) { r = copy_many_fields(&sub, more_properties); if (r < 0) return r; } if (!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) { if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) || dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) { if (job) *job = NULL; dbus_error_free(error); return 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 1; } 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) { if (dbus_error_has_name(&error, DBUS_ERROR_NO_REPLY) || dbus_error_has_name(&error, DBUS_ERROR_DISCONNECTED)) { dbus_error_free(&error); return true; } if (dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) || dbus_error_has_name(&error, BUS_ERROR_LOAD_FAILED)) { dbus_error_free(&error); return false; } 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"); }