/* SPDX-License-Identifier: LGPL-2.1+ */ #include "sd-bus.h" #include "alloc-util.h" #include "bpf-firewall.h" #include "bus-common-errors.h" #include "cgroup-util.h" #include "condition.h" #include "dbus-job.h" #include "dbus-unit.h" #include "dbus-util.h" #include "dbus.h" #include "fd-util.h" #include "locale-util.h" #include "log.h" #include "path-util.h" #include "process-util.h" #include "selinux-access.h" #include "signal-util.h" #include "special.h" #include "string-util.h" #include "strv.h" #include "user-util.h" #include "web-util.h" static bool unit_can_start_refuse_manual(Unit *u) { return unit_can_start(u) && !u->refuse_manual_start; } static bool unit_can_stop_refuse_manual(Unit *u) { return unit_can_stop(u) && !u->refuse_manual_stop; } static bool unit_can_isolate_refuse_manual(Unit *u) { return unit_can_isolate(u) && !u->refuse_manual_start; } static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_collect_mode, collect_mode, CollectMode); static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_load_state, unit_load_state, UnitLoadState); static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_job_mode, job_mode, JobMode); static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_emergency_action, emergency_action, EmergencyAction); static BUS_DEFINE_PROPERTY_GET(property_get_description, "s", Unit, unit_description); static BUS_DEFINE_PROPERTY_GET2(property_get_active_state, "s", Unit, unit_active_state, unit_active_state_to_string); static BUS_DEFINE_PROPERTY_GET(property_get_sub_state, "s", Unit, unit_sub_state_to_string); static BUS_DEFINE_PROPERTY_GET2(property_get_unit_file_state, "s", Unit, unit_get_unit_file_state, unit_file_state_to_string); static BUS_DEFINE_PROPERTY_GET(property_get_can_reload, "b", Unit, unit_can_reload); static BUS_DEFINE_PROPERTY_GET(property_get_can_start, "b", Unit, unit_can_start_refuse_manual); static BUS_DEFINE_PROPERTY_GET(property_get_can_stop, "b", Unit, unit_can_stop_refuse_manual); static BUS_DEFINE_PROPERTY_GET(property_get_can_isolate, "b", Unit, unit_can_isolate_refuse_manual); static BUS_DEFINE_PROPERTY_GET(property_get_need_daemon_reload, "b", Unit, unit_need_daemon_reload); static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_empty_strv, "as", 0); static int property_get_names( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Set **s = userdata; Iterator i; const char *t; int r; assert(bus); assert(reply); assert(s); r = sd_bus_message_open_container(reply, 'a', "s"); if (r < 0) return r; SET_FOREACH(t, *s, i) { r = sd_bus_message_append(reply, "s", t); if (r < 0) return r; } return sd_bus_message_close_container(reply); } static int property_get_following( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Unit *u = userdata, *f; assert(bus); assert(reply); assert(u); f = unit_following(u); return sd_bus_message_append(reply, "s", f ? f->id : NULL); } static int property_get_dependencies( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Hashmap **h = userdata; Iterator j; Unit *u; void *v; int r; assert(bus); assert(reply); assert(h); r = sd_bus_message_open_container(reply, 'a', "s"); if (r < 0) return r; HASHMAP_FOREACH_KEY(v, u, *h, j) { r = sd_bus_message_append(reply, "s", u->id); if (r < 0) return r; } return sd_bus_message_close_container(reply); } static int property_get_requires_mounts_for( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Hashmap **h = userdata; const char *p; Iterator j; void *v; int r; assert(bus); assert(reply); assert(h); r = sd_bus_message_open_container(reply, 'a', "s"); if (r < 0) return r; HASHMAP_FOREACH_KEY(v, p, *h, j) { r = sd_bus_message_append(reply, "s", p); if (r < 0) return r; } return sd_bus_message_close_container(reply); } static int property_get_unit_file_preset( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Unit *u = userdata; int r; assert(bus); assert(reply); assert(u); r = unit_get_unit_file_preset(u); return sd_bus_message_append(reply, "s", r < 0 ? NULL: r > 0 ? "enabled" : "disabled"); } static int property_get_job( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { _cleanup_free_ char *p = NULL; Job **j = userdata; assert(bus); assert(reply); assert(j); if (!*j) return sd_bus_message_append(reply, "(uo)", 0, "/"); p = job_dbus_path(*j); if (!p) return -ENOMEM; return sd_bus_message_append(reply, "(uo)", (*j)->id, p); } static int property_get_conditions( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { const char *(*to_string)(ConditionType type) = NULL; Condition **list = userdata, *c; int r; assert(bus); assert(reply); assert(list); to_string = streq(property, "Asserts") ? assert_type_to_string : condition_type_to_string; r = sd_bus_message_open_container(reply, 'a', "(sbbsi)"); if (r < 0) return r; LIST_FOREACH(conditions, c, *list) { int tristate; tristate = c->result == CONDITION_UNTESTED ? 0 : c->result == CONDITION_SUCCEEDED ? 1 : -1; r = sd_bus_message_append(reply, "(sbbsi)", to_string(c->type), c->trigger, c->negate, c->parameter, tristate); if (r < 0) return r; } return sd_bus_message_close_container(reply); } static int property_get_load_error( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL; Unit *u = userdata; int r; assert(bus); assert(reply); assert(u); r = bus_unit_validate_load_state(u, &e); if (r < 0) return sd_bus_message_append(reply, "(ss)", e.name, e.message); return sd_bus_message_append(reply, "(ss)", NULL, NULL); } static int bus_verify_manage_units_async_full( Unit *u, const char *verb, int capability, const char *polkit_message, bool interactive, sd_bus_message *call, sd_bus_error *error) { const char *details[9] = { "unit", u->id, "verb", verb, }; if (polkit_message) { details[4] = "polkit.message"; details[5] = polkit_message; details[6] = "polkit.gettext_domain"; details[7] = GETTEXT_PACKAGE; } return bus_verify_polkit_async( call, capability, "org.freedesktop.systemd1.manage-units", details, interactive, UID_INVALID, &u->manager->polkit_registry, error); } int bus_unit_method_start_generic( sd_bus_message *message, Unit *u, JobType job_type, bool reload_if_possible, sd_bus_error *error) { const char *smode; JobMode mode; _cleanup_free_ char *verb = NULL; static const char *const polkit_message_for_job[_JOB_TYPE_MAX] = { [JOB_START] = N_("Authentication is required to start '$(unit)'."), [JOB_STOP] = N_("Authentication is required to stop '$(unit)'."), [JOB_RELOAD] = N_("Authentication is required to reload '$(unit)'."), [JOB_RESTART] = N_("Authentication is required to restart '$(unit)'."), [JOB_TRY_RESTART] = N_("Authentication is required to restart '$(unit)'."), }; int r; assert(message); assert(u); assert(job_type >= 0 && job_type < _JOB_TYPE_MAX); r = mac_selinux_unit_access_check( u, message, job_type_to_access_method(job_type), error); if (r < 0) return r; r = sd_bus_message_read(message, "s", &smode); if (r < 0) return r; mode = job_mode_from_string(smode); if (mode < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Job mode %s invalid", smode); if (reload_if_possible) verb = strjoin("reload-or-", job_type_to_string(job_type)); else verb = strdup(job_type_to_string(job_type)); if (!verb) return -ENOMEM; r = bus_verify_manage_units_async_full( u, verb, CAP_SYS_ADMIN, job_type < _JOB_TYPE_MAX ? polkit_message_for_job[job_type] : NULL, true, message, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ return bus_unit_queue_job(message, u, job_type, mode, reload_if_possible, error); } static int method_start(sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(message, userdata, JOB_START, false, error); } static int method_stop(sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(message, userdata, JOB_STOP, false, error); } static int method_reload(sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(message, userdata, JOB_RELOAD, false, error); } static int method_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(message, userdata, JOB_RESTART, false, error); } static int method_try_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(message, userdata, JOB_TRY_RESTART, false, error); } static int method_reload_or_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(message, userdata, JOB_RESTART, true, error); } static int method_reload_or_try_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(message, userdata, JOB_TRY_RESTART, true, error); } int bus_unit_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) { Unit *u = userdata; const char *swho; int32_t signo; KillWho who; int r; assert(message); assert(u); r = mac_selinux_unit_access_check(u, message, "stop", error); if (r < 0) return r; r = sd_bus_message_read(message, "si", &swho, &signo); if (r < 0) return r; if (isempty(swho)) who = KILL_ALL; else { who = kill_who_from_string(swho); if (who < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid who argument %s", swho); } if (!SIGNAL_VALID(signo)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Signal number out of range."); r = bus_verify_manage_units_async_full( u, "kill", CAP_KILL, N_("Authentication is required to send a UNIX signal to the processes of '$(unit)'."), true, message, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ r = unit_kill(u, who, signo, error); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_unit_method_reset_failed(sd_bus_message *message, void *userdata, sd_bus_error *error) { Unit *u = userdata; int r; assert(message); assert(u); r = mac_selinux_unit_access_check(u, message, "reload", error); if (r < 0) return r; r = bus_verify_manage_units_async_full( u, "reset-failed", CAP_SYS_ADMIN, N_("Authentication is required to reset the \"failed\" state of '$(unit)'."), true, message, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ unit_reset_failed(u); return sd_bus_reply_method_return(message, NULL); } int bus_unit_method_set_properties(sd_bus_message *message, void *userdata, sd_bus_error *error) { Unit *u = userdata; int runtime, r; assert(message); assert(u); r = mac_selinux_unit_access_check(u, message, "start", error); if (r < 0) return r; r = sd_bus_message_read(message, "b", &runtime); if (r < 0) return r; r = bus_verify_manage_units_async_full( u, "set-property", CAP_SYS_ADMIN, N_("Authentication is required to set properties on '$(unit)'."), true, message, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ r = bus_unit_set_properties(u, message, runtime ? UNIT_RUNTIME : UNIT_PERSISTENT, true, error); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_unit_method_ref(sd_bus_message *message, void *userdata, sd_bus_error *error) { Unit *u = userdata; int r; assert(message); assert(u); r = mac_selinux_unit_access_check(u, message, "start", error); if (r < 0) return r; r = bus_verify_manage_units_async_full( u, "ref", CAP_SYS_ADMIN, NULL, false, message, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ r = bus_unit_track_add_sender(u, message); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_unit_method_unref(sd_bus_message *message, void *userdata, sd_bus_error *error) { Unit *u = userdata; int r; assert(message); assert(u); r = bus_unit_track_remove_sender(u, message); if (r == -EUNATCH) return sd_bus_error_setf(error, BUS_ERROR_NOT_REFERENCED, "Unit has not been referenced yet."); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } static int property_get_refs( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Unit *u = userdata; const char *i; int r; assert(bus); assert(reply); r = sd_bus_message_open_container(reply, 'a', "s"); if (r < 0) return r; for (i = sd_bus_track_first(u->bus_track); i; i = sd_bus_track_next(u->bus_track)) { int c, k; c = sd_bus_track_count_name(u->bus_track, i); if (c < 0) return c; /* Add the item multiple times if the ref count for each is above 1 */ for (k = 0; k < c; k++) { r = sd_bus_message_append(reply, "s", i); if (r < 0) return r; } } return sd_bus_message_close_container(reply); } const sd_bus_vtable bus_unit_vtable[] = { SD_BUS_VTABLE_START(0), SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Unit, id), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Names", "as", property_get_names, offsetof(Unit, names), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Following", "s", property_get_following, 0, 0), SD_BUS_PROPERTY("Requires", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRES]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Requisite", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUISITE]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Wants", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_WANTS]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("BindsTo", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BINDS_TO]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("PartOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_PART_OF]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("RequiredBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRED_BY]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("RequisiteOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUISITE_OF]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("WantedBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_WANTED_BY]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("BoundBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BOUND_BY]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("ConsistsOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONSISTS_OF]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Conflicts", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONFLICTS]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("ConflictedBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONFLICTED_BY]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Before", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BEFORE]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("After", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_AFTER]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("OnFailure", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_ON_FAILURE]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Triggers", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_TRIGGERS]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("TriggeredBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_TRIGGERED_BY]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("PropagatesReloadTo", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_PROPAGATES_RELOAD_TO]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("ReloadPropagatedFrom", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_RELOAD_PROPAGATED_FROM]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("JoinsNamespaceOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_JOINS_NAMESPACE_OF]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("RequiresMountsFor", "as", property_get_requires_mounts_for, offsetof(Unit, requires_mounts_for), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Documentation", "as", NULL, offsetof(Unit, documentation), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Description", "s", property_get_description, 0, SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("LoadState", "s", property_get_load_state, offsetof(Unit, load_state), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("ActiveState", "s", property_get_active_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("SubState", "s", property_get_sub_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("FragmentPath", "s", NULL, offsetof(Unit, fragment_path), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("SourcePath", "s", NULL, offsetof(Unit, source_path), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("DropInPaths", "as", NULL, offsetof(Unit, dropin_paths), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("UnitFileState", "s", property_get_unit_file_state, 0, 0), SD_BUS_PROPERTY("UnitFilePreset", "s", property_get_unit_file_preset, 0, 0), BUS_PROPERTY_DUAL_TIMESTAMP("StateChangeTimestamp", offsetof(Unit, state_change_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), BUS_PROPERTY_DUAL_TIMESTAMP("InactiveExitTimestamp", offsetof(Unit, inactive_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), BUS_PROPERTY_DUAL_TIMESTAMP("ActiveEnterTimestamp", offsetof(Unit, active_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), BUS_PROPERTY_DUAL_TIMESTAMP("ActiveExitTimestamp", offsetof(Unit, active_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), BUS_PROPERTY_DUAL_TIMESTAMP("InactiveEnterTimestamp", offsetof(Unit, inactive_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("CanStart", "b", property_get_can_start, 0, SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("CanStop", "b", property_get_can_stop, 0, SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("CanReload", "b", property_get_can_reload, 0, SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("CanIsolate", "b", property_get_can_isolate, 0, SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Job", "(uo)", property_get_job, offsetof(Unit, job), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("StopWhenUnneeded", "b", bus_property_get_bool, offsetof(Unit, stop_when_unneeded), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("RefuseManualStart", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_start), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("RefuseManualStop", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_stop), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("AllowIsolate", "b", bus_property_get_bool, offsetof(Unit, allow_isolate), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("DefaultDependencies", "b", bus_property_get_bool, offsetof(Unit, default_dependencies), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("OnFailureJobMode", "s", property_get_job_mode, offsetof(Unit, on_failure_job_mode), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("IgnoreOnIsolate", "b", bus_property_get_bool, offsetof(Unit, ignore_on_isolate), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("NeedDaemonReload", "b", property_get_need_daemon_reload, 0, SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("JobTimeoutUSec", "t", bus_property_get_usec, offsetof(Unit, job_timeout), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("JobRunningTimeoutUSec", "t", bus_property_get_usec, offsetof(Unit, job_running_timeout), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("JobTimeoutAction", "s", property_get_emergency_action, offsetof(Unit, job_timeout_action), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("JobTimeoutRebootArgument", "s", NULL, offsetof(Unit, job_timeout_reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("ConditionResult", "b", bus_property_get_bool, offsetof(Unit, condition_result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("AssertResult", "b", bus_property_get_bool, offsetof(Unit, assert_result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), BUS_PROPERTY_DUAL_TIMESTAMP("ConditionTimestamp", offsetof(Unit, condition_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), BUS_PROPERTY_DUAL_TIMESTAMP("AssertTimestamp", offsetof(Unit, assert_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("Conditions", "a(sbbsi)", property_get_conditions, offsetof(Unit, conditions), 0), SD_BUS_PROPERTY("Asserts", "a(sbbsi)", property_get_conditions, offsetof(Unit, asserts), 0), SD_BUS_PROPERTY("LoadError", "(ss)", property_get_load_error, 0, SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Transient", "b", bus_property_get_bool, offsetof(Unit, transient), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Perpetual", "b", bus_property_get_bool, offsetof(Unit, perpetual), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("StartLimitIntervalUSec", "t", bus_property_get_usec, offsetof(Unit, start_limit.interval), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("StartLimitBurst", "u", bus_property_get_unsigned, offsetof(Unit, start_limit.burst), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("StartLimitAction", "s", property_get_emergency_action, offsetof(Unit, start_limit_action), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("FailureAction", "s", property_get_emergency_action, offsetof(Unit, failure_action), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("SuccessAction", "s", property_get_emergency_action, offsetof(Unit, success_action), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("RebootArgument", "s", NULL, offsetof(Unit, reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("InvocationID", "ay", bus_property_get_id128, offsetof(Unit, invocation_id), 0), SD_BUS_PROPERTY("CollectMode", "s", property_get_collect_mode, offsetof(Unit, collect_mode), 0), SD_BUS_PROPERTY("Refs", "as", property_get_refs, 0, 0), SD_BUS_METHOD("Start", "s", "o", method_start, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("Stop", "s", "o", method_stop, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("Reload", "s", "o", method_reload, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("Restart", "s", "o", method_restart, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("TryRestart", "s", "o", method_try_restart, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("ReloadOrRestart", "s", "o", method_reload_or_restart, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("ReloadOrTryRestart", "s", "o", method_reload_or_try_restart, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("Kill", "si", NULL, bus_unit_method_kill, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("ResetFailed", NULL, NULL, bus_unit_method_reset_failed, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("SetProperties", "ba(sv)", NULL, bus_unit_method_set_properties, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("Ref", NULL, NULL, bus_unit_method_ref, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("Unref", NULL, NULL, bus_unit_method_unref, SD_BUS_VTABLE_UNPRIVILEGED), /* For dependency types we don't support anymore always return an empty array */ SD_BUS_PROPERTY("RequiresOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN), SD_BUS_PROPERTY("RequisiteOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN), SD_BUS_PROPERTY("RequiredByOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN), SD_BUS_PROPERTY("RequisiteOfOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN), /* Obsolete alias names */ SD_BUS_PROPERTY("StartLimitInterval", "t", bus_property_get_usec, offsetof(Unit, start_limit.interval), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN), SD_BUS_PROPERTY("StartLimitIntervalSec", "t", bus_property_get_usec, offsetof(Unit, start_limit.interval), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN), SD_BUS_VTABLE_END }; static int property_get_slice( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Unit *u = userdata; assert(bus); assert(reply); assert(u); return sd_bus_message_append(reply, "s", unit_slice_name(u)); } static int property_get_current_memory( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { uint64_t sz = (uint64_t) -1; Unit *u = userdata; int r; assert(bus); assert(reply); assert(u); r = unit_get_memory_current(u, &sz); if (r < 0 && r != -ENODATA) log_unit_warning_errno(u, r, "Failed to get memory.usage_in_bytes attribute: %m"); return sd_bus_message_append(reply, "t", sz); } static int property_get_current_tasks( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { uint64_t cn = (uint64_t) -1; Unit *u = userdata; int r; assert(bus); assert(reply); assert(u); r = unit_get_tasks_current(u, &cn); if (r < 0 && r != -ENODATA) log_unit_warning_errno(u, r, "Failed to get pids.current attribute: %m"); return sd_bus_message_append(reply, "t", cn); } static int property_get_cpu_usage( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { nsec_t ns = (nsec_t) -1; Unit *u = userdata; int r; assert(bus); assert(reply); assert(u); r = unit_get_cpu_usage(u, &ns); if (r < 0 && r != -ENODATA) log_unit_warning_errno(u, r, "Failed to get cpuacct.usage attribute: %m"); return sd_bus_message_append(reply, "t", ns); } static int property_get_cgroup( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Unit *u = userdata; const char *t = NULL; assert(bus); assert(reply); assert(u); /* Three cases: a) u->cgroup_path is NULL, in which case the * unit has no control group, which we report as the empty * string. b) u->cgroup_path is the empty string, which * indicates the root cgroup, which we report as "/". c) all * other cases we report as-is. */ if (u->cgroup_path) t = empty_to_root(u->cgroup_path); return sd_bus_message_append(reply, "s", t); } static int append_process(sd_bus_message *reply, const char *p, pid_t pid, Set *pids) { _cleanup_free_ char *buf = NULL, *cmdline = NULL; int r; assert(reply); assert(pid > 0); r = set_put(pids, PID_TO_PTR(pid)); if (IN_SET(r, 0, -EEXIST)) return 0; if (r < 0) return r; if (!p) { r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &buf); if (r == -ESRCH) return 0; if (r < 0) return r; p = buf; } (void) get_process_cmdline(pid, 0, true, &cmdline); return sd_bus_message_append(reply, "(sus)", p, (uint32_t) pid, cmdline); } static int append_cgroup(sd_bus_message *reply, const char *p, Set *pids) { _cleanup_closedir_ DIR *d = NULL; _cleanup_fclose_ FILE *f = NULL; int r; assert(reply); assert(p); r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, p, &f); if (r == -ENOENT) return 0; if (r < 0) return r; for (;;) { pid_t pid; r = cg_read_pid(f, &pid); if (r < 0) return r; if (r == 0) break; if (is_kernel_thread(pid) > 0) continue; r = append_process(reply, p, pid, pids); if (r < 0) return r; } r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, p, &d); if (r == -ENOENT) return 0; if (r < 0) return r; for (;;) { _cleanup_free_ char *g = NULL, *j = NULL; r = cg_read_subgroup(d, &g); if (r < 0) return r; if (r == 0) break; j = strjoin(p, "/", g); if (!j) return -ENOMEM; r = append_cgroup(reply, j, pids); if (r < 0) return r; } return 0; } int bus_unit_method_get_processes(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; _cleanup_set_free_ Set *pids = NULL; Unit *u = userdata; pid_t pid; int r; assert(message); r = mac_selinux_unit_access_check(u, message, "status", error); if (r < 0) return r; pids = set_new(NULL); if (!pids) return -ENOMEM; r = sd_bus_message_new_method_return(message, &reply); if (r < 0) return r; r = sd_bus_message_open_container(reply, 'a', "(sus)"); if (r < 0) return r; if (u->cgroup_path) { r = append_cgroup(reply, u->cgroup_path, pids); if (r < 0) return r; } /* The main and control pids might live outside of the cgroup, hence fetch them separately */ pid = unit_main_pid(u); if (pid > 0) { r = append_process(reply, NULL, pid, pids); if (r < 0) return r; } pid = unit_control_pid(u); if (pid > 0) { r = append_process(reply, NULL, pid, pids); if (r < 0) return r; } r = sd_bus_message_close_container(reply); if (r < 0) return r; return sd_bus_send(NULL, reply, NULL); } static int property_get_ip_counter( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { CGroupIPAccountingMetric metric; uint64_t value = (uint64_t) -1; Unit *u = userdata; assert(bus); assert(reply); assert(property); assert(u); if (streq(property, "IPIngressBytes")) metric = CGROUP_IP_INGRESS_BYTES; else if (streq(property, "IPIngressPackets")) metric = CGROUP_IP_INGRESS_PACKETS; else if (streq(property, "IPEgressBytes")) metric = CGROUP_IP_EGRESS_BYTES; else { assert(streq(property, "IPEgressPackets")); metric = CGROUP_IP_EGRESS_PACKETS; } (void) unit_get_ip_accounting(u, metric, &value); return sd_bus_message_append(reply, "t", value); } int bus_unit_method_attach_processes(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; _cleanup_set_free_ Set *pids = NULL; Unit *u = userdata; const char *path; int r; assert(message); /* This migrates the processes with the specified PIDs into the cgroup of this unit, optionally below a * specified cgroup path. Obviously this only works for units that actually maintain a cgroup * representation. If a process is already in the cgroup no operation is executed – in this case the specified * subcgroup path has no effect! */ r = mac_selinux_unit_access_check(u, message, "start", error); if (r < 0) return r; r = sd_bus_message_read(message, "s", &path); if (r < 0) return r; path = empty_to_null(path); if (path) { if (!path_is_absolute(path)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Control group path is not absolute: %s", path); if (!path_is_normalized(path)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Control group path is not normalized: %s", path); } if (!unit_cgroup_delegate(u)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process migration not available on non-delegated units."); if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u))) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unit is not active, refusing."); r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds); if (r < 0) return r; r = sd_bus_message_enter_container(message, 'a', "u"); if (r < 0) return r; for (;;) { uid_t process_uid, sender_uid; uint32_t upid; pid_t pid; r = sd_bus_message_read(message, "u", &upid); if (r < 0) return r; if (r == 0) break; if (upid == 0) { r = sd_bus_creds_get_pid(creds, &pid); if (r < 0) return r; } else pid = (uid_t) upid; /* Filter out duplicates */ if (set_contains(pids, PID_TO_PTR(pid))) continue; /* Check if this process is suitable for attaching to this unit */ r = unit_pid_attachable(u, pid, error); if (r < 0) return r; /* Let's query the sender's UID, so that we can make our security decisions */ r = sd_bus_creds_get_euid(creds, &sender_uid); if (r < 0) return r; /* Let's validate security: if the sender is root, then all is OK. If the sender is any other unit, * then the process' UID and the target unit's UID have to match the sender's UID */ if (sender_uid != 0 && sender_uid != getuid()) { r = get_process_uid(pid, &process_uid); if (r < 0) return sd_bus_error_set_errnof(error, r, "Failed to retrieve process UID: %m"); if (process_uid != sender_uid) return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Process " PID_FMT " not owned by client's UID. Refusing.", pid); if (process_uid != u->ref_uid) return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Process " PID_FMT " not owned by target unit's UID. Refusing.", pid); } if (!pids) { pids = set_new(NULL); if (!pids) return -ENOMEM; } r = set_put(pids, PID_TO_PTR(pid)); if (r < 0) return r; } r = sd_bus_message_exit_container(message); if (r < 0) return r; r = unit_attach_pids_to_cgroup(u, pids, path); if (r < 0) return sd_bus_error_set_errnof(error, r, "Failed to attach processes to control group: %m"); return sd_bus_reply_method_return(message, NULL); } const sd_bus_vtable bus_unit_cgroup_vtable[] = { SD_BUS_VTABLE_START(0), SD_BUS_PROPERTY("Slice", "s", property_get_slice, 0, 0), SD_BUS_PROPERTY("ControlGroup", "s", property_get_cgroup, 0, 0), SD_BUS_PROPERTY("MemoryCurrent", "t", property_get_current_memory, 0, 0), SD_BUS_PROPERTY("CPUUsageNSec", "t", property_get_cpu_usage, 0, 0), SD_BUS_PROPERTY("TasksCurrent", "t", property_get_current_tasks, 0, 0), SD_BUS_PROPERTY("IPIngressBytes", "t", property_get_ip_counter, 0, 0), SD_BUS_PROPERTY("IPIngressPackets", "t", property_get_ip_counter, 0, 0), SD_BUS_PROPERTY("IPEgressBytes", "t", property_get_ip_counter, 0, 0), SD_BUS_PROPERTY("IPEgressPackets", "t", property_get_ip_counter, 0, 0), SD_BUS_METHOD("GetProcesses", NULL, "a(sus)", bus_unit_method_get_processes, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("AttachProcesses", "sau", NULL, bus_unit_method_attach_processes, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_VTABLE_END }; static int send_new_signal(sd_bus *bus, void *userdata) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; _cleanup_free_ char *p = NULL; Unit *u = userdata; int r; assert(bus); assert(u); p = unit_dbus_path(u); if (!p) return -ENOMEM; r = sd_bus_message_new_signal( bus, &m, "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitNew"); if (r < 0) return r; r = sd_bus_message_append(m, "so", u->id, p); if (r < 0) return r; return sd_bus_send(bus, m, NULL); } static int send_changed_signal(sd_bus *bus, void *userdata) { _cleanup_free_ char *p = NULL; Unit *u = userdata; int r; assert(bus); assert(u); p = unit_dbus_path(u); if (!p) return -ENOMEM; /* Send a properties changed signal. First for the specific * type, then for the generic unit. The clients may rely on * this order to get atomic behavior if needed. */ r = sd_bus_emit_properties_changed_strv( bus, p, unit_dbus_interface_from_type(u->type), NULL); if (r < 0) return r; return sd_bus_emit_properties_changed_strv( bus, p, "org.freedesktop.systemd1.Unit", NULL); } void bus_unit_send_change_signal(Unit *u) { int r; assert(u); if (u->in_dbus_queue) { LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); u->in_dbus_queue = false; } if (!u->id) return; r = bus_foreach_bus(u->manager, u->bus_track, u->sent_dbus_new_signal ? send_changed_signal : send_new_signal, u); if (r < 0) log_unit_debug_errno(u, r, "Failed to send unit change signal for %s: %m", u->id); u->sent_dbus_new_signal = true; } static int send_removed_signal(sd_bus *bus, void *userdata) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; _cleanup_free_ char *p = NULL; Unit *u = userdata; int r; assert(bus); assert(u); p = unit_dbus_path(u); if (!p) return -ENOMEM; r = sd_bus_message_new_signal( bus, &m, "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitRemoved"); if (r < 0) return r; r = sd_bus_message_append(m, "so", u->id, p); if (r < 0) return r; return sd_bus_send(bus, m, NULL); } void bus_unit_send_removed_signal(Unit *u) { int r; assert(u); if (!u->sent_dbus_new_signal || u->in_dbus_queue) bus_unit_send_change_signal(u); if (!u->id) return; r = bus_foreach_bus(u->manager, u->bus_track, send_removed_signal, u); if (r < 0) log_unit_debug_errno(u, r, "Failed to send unit remove signal for %s: %m", u->id); } int bus_unit_queue_job( sd_bus_message *message, Unit *u, JobType type, JobMode mode, bool reload_if_possible, sd_bus_error *error) { _cleanup_free_ char *path = NULL; Job *j; int r; assert(message); assert(u); assert(type >= 0 && type < _JOB_TYPE_MAX); assert(mode >= 0 && mode < _JOB_MODE_MAX); r = mac_selinux_unit_access_check( u, message, job_type_to_access_method(type), error); if (r < 0) return r; if (reload_if_possible && unit_can_reload(u)) { if (type == JOB_RESTART) type = JOB_RELOAD_OR_START; else if (type == JOB_TRY_RESTART) type = JOB_TRY_RELOAD; } if (type == JOB_STOP && IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_ERROR, UNIT_BAD_SETTING) && unit_active_state(u) == UNIT_INACTIVE) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not loaded.", u->id); if ((type == JOB_START && u->refuse_manual_start) || (type == JOB_STOP && u->refuse_manual_stop) || (IN_SET(type, JOB_RESTART, JOB_TRY_RESTART) && (u->refuse_manual_start || u->refuse_manual_stop)) || (type == JOB_RELOAD_OR_START && job_type_collapse(type, u) == JOB_START && u->refuse_manual_start)) return sd_bus_error_setf(error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, unit %s may be requested by dependency only (it is configured to refuse manual start/stop).", u->id); r = manager_add_job(u->manager, type, u, mode, error, &j); if (r < 0) return r; r = bus_job_track_sender(j, message); if (r < 0) return r; path = job_dbus_path(j); if (!path) return -ENOMEM; return sd_bus_reply_method_return(message, "o", path); } static int bus_unit_set_live_property( Unit *u, const char *name, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error) { int r; assert(u); assert(name); assert(message); /* Handles setting properties both "live" (i.e. at any time during runtime), and during creation (for transient * units that are being created). */ if (streq(name, "Description")) { const char *d; r = sd_bus_message_read(message, "s", &d); if (r < 0) return r; if (!UNIT_WRITE_FLAGS_NOOP(flags)) { r = unit_set_description(u, d); if (r < 0) return r; unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "Description=%s", d); } return 1; } return 0; } static int bus_set_transient_emergency_action( Unit *u, const char *name, EmergencyAction *p, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error) { const char *s; EmergencyAction v; int r; bool system; assert(p); r = sd_bus_message_read(message, "s", &s); if (r < 0) return r; system = MANAGER_IS_SYSTEM(u->manager); r = parse_emergency_action(s, system, &v); if (v < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, v == -EOPNOTSUPP ? "EmergencyAction setting invalid for manager type: %s" : "Invalid %s setting: %s", name, s); if (!UNIT_WRITE_FLAGS_NOOP(flags)) { *p = v; unit_write_settingf(u, flags, name, "%s=%s", name, s); } return 1; } static BUS_DEFINE_SET_TRANSIENT_PARSE(collect_mode, CollectMode, collect_mode_from_string); static BUS_DEFINE_SET_TRANSIENT_PARSE(job_mode, JobMode, job_mode_from_string); static int bus_set_transient_conditions( Unit *u, const char *name, Condition **list, bool is_condition, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error) { const char *type_name, *param; int trigger, negate, r; bool empty = true; assert(list); r = sd_bus_message_enter_container(message, 'a', "(sbbs)"); if (r < 0) return r; while ((r = sd_bus_message_read(message, "(sbbs)", &type_name, &trigger, &negate, ¶m)) > 0) { ConditionType t; t = is_condition ? condition_type_from_string(type_name) : assert_type_from_string(type_name); if (t < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid condition type: %s", type_name); if (t != CONDITION_NULL) { if (isempty(param)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Condition parameter in %s is empty", type_name); if (condition_takes_path(t) && !path_is_absolute(param)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path in condition %s is not absolute: %s", type_name, param); } else param = NULL; if (!UNIT_WRITE_FLAGS_NOOP(flags)) { Condition *c; c = condition_new(t, param, trigger, negate); if (!c) return -ENOMEM; LIST_PREPEND(conditions, *list, c); if (t != CONDITION_NULL) unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "%s=%s%s%s", type_name, trigger ? "|" : "", negate ? "!" : "", param); else unit_write_settingf(u, flags, name, "%s=%s%s", type_name, trigger ? "|" : "", yes_no(!negate)); } empty = false; } if (r < 0) return r; r = sd_bus_message_exit_container(message); if (r < 0) return r; if (!UNIT_WRITE_FLAGS_NOOP(flags) && empty) { *list = condition_free_list(*list); unit_write_settingf(u, flags, name, "%sNull=", is_condition ? "Condition" : "Assert"); } return 1; } static int bus_unit_set_transient_property( Unit *u, const char *name, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error) { UnitDependency d = _UNIT_DEPENDENCY_INVALID; int r; assert(u); assert(name); assert(message); /* Handles settings when transient units are created. This settings cannot be altered anymore after the unit * has been created. */ if (streq(name, "SourcePath")) return bus_set_transient_path(u, name, &u->source_path, message, flags, error); if (streq(name, "StopWhenUnneeded")) return bus_set_transient_bool(u, name, &u->stop_when_unneeded, message, flags, error); if (streq(name, "RefuseManualStart")) return bus_set_transient_bool(u, name, &u->refuse_manual_start, message, flags, error); if (streq(name, "RefuseManualStop")) return bus_set_transient_bool(u, name, &u->refuse_manual_stop, message, flags, error); if (streq(name, "AllowIsolate")) return bus_set_transient_bool(u, name, &u->allow_isolate, message, flags, error); if (streq(name, "DefaultDependencies")) return bus_set_transient_bool(u, name, &u->default_dependencies, message, flags, error); if (streq(name, "OnFailureJobMode")) return bus_set_transient_job_mode(u, name, &u->on_failure_job_mode, message, flags, error); if (streq(name, "IgnoreOnIsolate")) return bus_set_transient_bool(u, name, &u->ignore_on_isolate, message, flags, error); if (streq(name, "JobTimeoutUSec")) { r = bus_set_transient_usec_fix_0(u, name, &u->job_timeout, message, flags, error); if (r >= 0 && !UNIT_WRITE_FLAGS_NOOP(flags) && !u->job_running_timeout_set) u->job_running_timeout = u->job_timeout; } if (streq(name, "JobRunningTimeoutUSec")) { r = bus_set_transient_usec_fix_0(u, name, &u->job_running_timeout, message, flags, error); if (r >= 0 && !UNIT_WRITE_FLAGS_NOOP(flags)) u->job_running_timeout_set = true; return r; } if (streq(name, "JobTimeoutAction")) return bus_set_transient_emergency_action(u, name, &u->job_timeout_action, message, flags, error); if (streq(name, "JobTimeoutRebootArgument")) return bus_set_transient_string(u, name, &u->job_timeout_reboot_arg, message, flags, error); if (streq(name, "StartLimitIntervalUSec")) return bus_set_transient_usec(u, name, &u->start_limit.interval, message, flags, error); if (streq(name, "StartLimitBurst")) return bus_set_transient_unsigned(u, name, &u->start_limit.burst, message, flags, error); if (streq(name, "StartLimitAction")) return bus_set_transient_emergency_action(u, name, &u->start_limit_action, message, flags, error); if (streq(name, "FailureAction")) return bus_set_transient_emergency_action(u, name, &u->failure_action, message, flags, error); if (streq(name, "SuccessAction")) return bus_set_transient_emergency_action(u, name, &u->success_action, message, flags, error); if (streq(name, "RebootArgument")) return bus_set_transient_string(u, name, &u->reboot_arg, message, flags, error); if (streq(name, "CollectMode")) return bus_set_transient_collect_mode(u, name, &u->collect_mode, message, flags, error); if (streq(name, "Conditions")) return bus_set_transient_conditions(u, name, &u->conditions, true, message, flags, error); if (streq(name, "Asserts")) return bus_set_transient_conditions(u, name, &u->asserts, false, message, flags, error); if (streq(name, "Documentation")) { _cleanup_strv_free_ char **l = NULL; char **p; r = sd_bus_message_read_strv(message, &l); if (r < 0) return r; STRV_FOREACH(p, l) { if (!documentation_url_is_valid(*p)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid URL in %s: %s", name, *p); } if (!UNIT_WRITE_FLAGS_NOOP(flags)) { if (strv_isempty(l)) { u->documentation = strv_free(u->documentation); unit_write_settingf(u, flags, name, "%s=", name); } else { strv_extend_strv(&u->documentation, l, false); STRV_FOREACH(p, l) unit_write_settingf(u, flags, name, "%s=%s", name, *p); } } return 1; } else if (streq(name, "Slice")) { Unit *slice; const char *s; if (!UNIT_HAS_CGROUP_CONTEXT(u)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "The slice property is only available for units with control groups."); if (u->type == UNIT_SLICE) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Slice may not be set for slice units."); if (unit_has_name(u, SPECIAL_INIT_SCOPE)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot set slice for init.scope"); r = sd_bus_message_read(message, "s", &s); if (r < 0) return r; if (!unit_name_is_valid(s, UNIT_NAME_PLAIN)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name '%s'", s); /* Note that we do not dispatch the load queue here yet, as we don't want our own transient unit to be * loaded while we are still setting it up. Or in other words, we use manager_load_unit_prepare() * instead of manager_load_unit() on purpose, here. */ r = manager_load_unit_prepare(u->manager, s, NULL, error, &slice); if (r < 0) return r; if (slice->type != UNIT_SLICE) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unit name '%s' is not a slice", s); if (!UNIT_WRITE_FLAGS_NOOP(flags)) { r = unit_set_slice(u, slice); if (r < 0) return r; unit_write_settingf(u, flags|UNIT_PRIVATE, name, "Slice=%s", s); } return 1; } else if (streq(name, "RequiresMountsFor")) { _cleanup_strv_free_ char **l = NULL; char **p; r = sd_bus_message_read_strv(message, &l); if (r < 0) return r; STRV_FOREACH(p, l) { if (!path_is_absolute(*p)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path specified in %s is not absolute: %s", name, *p); if (!UNIT_WRITE_FLAGS_NOOP(flags)) { r = unit_require_mounts_for(u, *p, UNIT_DEPENDENCY_FILE); if (r < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Failed to add required mount \"%s\": %m", *p); unit_write_settingf(u, flags, name, "%s=%s", name, *p); } } return 1; } if (streq(name, "RequiresOverridable")) d = UNIT_REQUIRES; /* redirect for obsolete unit dependency type */ else if (streq(name, "RequisiteOverridable")) d = UNIT_REQUISITE; /* same here */ else d = unit_dependency_from_string(name); if (d >= 0) { const char *other; r = sd_bus_message_enter_container(message, 'a', "s"); if (r < 0) return r; while ((r = sd_bus_message_read(message, "s", &other)) > 0) { if (!unit_name_is_valid(other, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name %s", other); if (!UNIT_WRITE_FLAGS_NOOP(flags)) { _cleanup_free_ char *label = NULL; r = unit_add_dependency_by_name(u, d, other, true, UNIT_DEPENDENCY_FILE); if (r < 0) return r; label = strjoin(name, "-", other); if (!label) return -ENOMEM; unit_write_settingf(u, flags, label, "%s=%s", unit_dependency_to_string(d), other); } } if (r < 0) return r; r = sd_bus_message_exit_container(message); if (r < 0) return r; return 1; } else if (streq(name, "AddRef")) { int b; /* Why is this called "AddRef" rather than just "Ref", or "Reference"? There's already a "Ref()" method * on the Unit interface, and it's probably not a good idea to expose a property and a method on the * same interface (well, strictly speaking AddRef isn't exposed as full property, we just read it for * transient units, but still). And "References" and "ReferencedBy" is already used as unit reference * dependency type, hence let's not confuse things with that. * * Note that we don't acually add the reference to the bus track. We do that only after the setup of * the transient unit is complete, so that setting this property multiple times in the same transient * unit creation call doesn't count as individual references. */ r = sd_bus_message_read(message, "b", &b); if (r < 0) return r; if (!UNIT_WRITE_FLAGS_NOOP(flags)) u->bus_track_add = b; return 1; } return 0; } int bus_unit_set_properties( Unit *u, sd_bus_message *message, UnitWriteFlags flags, bool commit, sd_bus_error *error) { bool for_real = false; unsigned n = 0; int r; assert(u); assert(message); /* We iterate through the array twice. First run we just check * if all passed data is valid, second run actually applies * it. This is to implement transaction-like behaviour without * actually providing full transactions. */ r = sd_bus_message_enter_container(message, 'a', "(sv)"); if (r < 0) return r; for (;;) { const char *name; UnitWriteFlags f; r = sd_bus_message_enter_container(message, 'r', "sv"); if (r < 0) return r; if (r == 0) { if (for_real || UNIT_WRITE_FLAGS_NOOP(flags)) break; /* Reached EOF. Let's try again, and this time for realz... */ r = sd_bus_message_rewind(message, false); if (r < 0) return r; for_real = true; continue; } r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; if (!UNIT_VTABLE(u)->bus_set_property) return sd_bus_error_setf(error, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Objects of this type do not support setting properties."); r = sd_bus_message_enter_container(message, 'v', NULL); if (r < 0) return r; /* If not for real, then mask out the two target flags */ f = for_real ? flags : (flags & ~(UNIT_RUNTIME|UNIT_PERSISTENT)); r = UNIT_VTABLE(u)->bus_set_property(u, name, message, f, error); if (r == 0 && u->transient && u->load_state == UNIT_STUB) r = bus_unit_set_transient_property(u, name, message, f, error); if (r == 0) r = bus_unit_set_live_property(u, name, message, f, error); if (r < 0) return r; if (r == 0) return sd_bus_error_setf(error, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Cannot set property %s, or unknown property.", name); r = sd_bus_message_exit_container(message); if (r < 0) return r; r = sd_bus_message_exit_container(message); if (r < 0) return r; n += for_real; } r = sd_bus_message_exit_container(message); if (r < 0) return r; if (commit && n > 0 && UNIT_VTABLE(u)->bus_commit_properties) UNIT_VTABLE(u)->bus_commit_properties(u); return n; } int bus_unit_validate_load_state(Unit *u, sd_bus_error *error) { assert(u); /* Generates a pretty error if a unit isn't properly loaded. */ switch (u->load_state) { case UNIT_LOADED: return 0; case UNIT_NOT_FOUND: return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not found.", u->id); case UNIT_BAD_SETTING: return sd_bus_error_setf(error, BUS_ERROR_BAD_UNIT_SETTING, "Unit %s has a bad unit file setting.", u->id); case UNIT_ERROR: /* Only show .load_error in UNIT_ERROR state */ return sd_bus_error_set_errnof(error, u->load_error, "Unit %s failed to load properly: %m.", u->id); case UNIT_MASKED: return sd_bus_error_setf(error, BUS_ERROR_UNIT_MASKED, "Unit %s is masked.", u->id); case UNIT_STUB: case UNIT_MERGED: default: return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unexpected load state of unit %s", u->id); } } static int bus_unit_track_handler(sd_bus_track *t, void *userdata) { Unit *u = userdata; assert(t); assert(u); u->bus_track = sd_bus_track_unref(u->bus_track); /* make sure we aren't called again */ /* If the client that tracks us disappeared, then there's reason to believe that the cgroup is empty now too, * let's see */ unit_add_to_cgroup_empty_queue(u); /* Also add the unit to the GC queue, after all if the client left it might be time to GC this unit */ unit_add_to_gc_queue(u); return 0; } static int bus_unit_allocate_bus_track(Unit *u) { int r; assert(u); if (u->bus_track) return 0; r = sd_bus_track_new(u->manager->api_bus, &u->bus_track, bus_unit_track_handler, u); if (r < 0) return r; r = sd_bus_track_set_recursive(u->bus_track, true); if (r < 0) { u->bus_track = sd_bus_track_unref(u->bus_track); return r; } return 0; } int bus_unit_track_add_name(Unit *u, const char *name) { int r; assert(u); r = bus_unit_allocate_bus_track(u); if (r < 0) return r; return sd_bus_track_add_name(u->bus_track, name); } int bus_unit_track_add_sender(Unit *u, sd_bus_message *m) { int r; assert(u); r = bus_unit_allocate_bus_track(u); if (r < 0) return r; return sd_bus_track_add_sender(u->bus_track, m); } int bus_unit_track_remove_sender(Unit *u, sd_bus_message *m) { assert(u); /* If we haven't allocated the bus track object yet, then there's definitely no reference taken yet, return an * error */ if (!u->bus_track) return -EUNATCH; return sd_bus_track_remove_sender(u->bus_track, m); }