/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU 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 "sd-bus.h" #include "log.h" #include "selinux-access.h" #include "cgroup-util.h" #include "strv.h" #include "path-util.h" #include "fileio.h" #include "bus-common-errors.h" #include "dbus.h" #include "dbus-manager.h" #include "dbus-unit.h" 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_failure_action, failure_action, FailureAction); 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) { Unit *u = userdata; Iterator i; const char *t; int r; assert(bus); assert(reply); assert(u); r = sd_bus_message_open_container(reply, 'a', "s"); if (r < 0) return r; SET_FOREACH(t, u->names, 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 : ""); } 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) { Set *s = *(Set**) userdata; Iterator j; Unit *u; int r; assert(bus); assert(reply); r = sd_bus_message_open_container(reply, 'a', "s"); if (r < 0) return r; SET_FOREACH(u, s, 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_description( 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_description(u)); } static int property_get_active_state( 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_active_state_to_string(unit_active_state(u))); } static int property_get_sub_state( 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_sub_state_to_string(u)); } 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 ? "": r > 0 ? "enabled" : "disabled"); } static int property_get_unit_file_state( 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_file_state_to_string(unit_get_unit_file_state(u))); } static int property_get_can_start( 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, "b", unit_can_start(u) && !u->refuse_manual_start); } static int property_get_can_stop( 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); /* On the lower levels we assume that every unit we can start * we can also stop */ return sd_bus_message_append(reply, "b", unit_can_start(u) && !u->refuse_manual_stop); } static int property_get_can_reload( 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, "b", unit_can_reload(u)); } static int property_get_can_isolate( 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, "b", unit_can_isolate(u) && !u->refuse_manual_start); } 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; Unit *u = userdata; assert(bus); assert(reply); assert(u); if (!u->job) return sd_bus_message_append(reply, "(uo)", 0, "/"); p = job_dbus_path(u->job); if (!p) return -ENOMEM; return sd_bus_message_append(reply, "(uo)", u->job->id, p); } static int property_get_need_daemon_reload( 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, "b", unit_need_daemon_reload(u)); } 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_bus_error_free_ sd_bus_error e = SD_BUS_ERROR_NULL; Unit *u = userdata; assert(bus); assert(reply); assert(u); if (u->load_error != 0) sd_bus_error_set_errno(&e, u->load_error); return sd_bus_message_append(reply, "(ss)", e.name, e.message); } int bus_unit_method_start_generic(sd_bus *bus, sd_bus_message *message, Unit *u, JobType job_type, bool reload_if_possible, sd_bus_error *error) { const char *smode; JobMode mode; int r; assert(bus); assert(message); assert(u); assert(job_type >= 0 && job_type < _JOB_TYPE_MAX); 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); return bus_unit_queue_job(bus, message, u, job_type, mode, reload_if_possible, error); } static int method_start(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(bus, message, userdata, JOB_START, false, error); } static int method_stop(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(bus, message, userdata, JOB_STOP, false, error); } static int method_reload(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(bus, message, userdata, JOB_RELOAD, false, error); } static int method_restart(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(bus, message, userdata, JOB_RESTART, false, error); } static int method_try_restart(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(bus, message, userdata, JOB_TRY_RESTART, false, error); } static int method_reload_or_restart(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(bus, message, userdata, JOB_RESTART, true, error); } static int method_reload_or_try_restart(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { return bus_unit_method_start_generic(bus, message, userdata, JOB_TRY_RESTART, true, error); } int bus_unit_method_kill(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { Unit *u = userdata; const char *swho; int32_t signo; KillWho who; int r; assert(bus); assert(message); assert(u); r = bus_verify_manage_unit_async_for_kill(u->manager, 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 = 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 (signo <= 0 || signo >= _NSIG) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Signal number out of range."); r = mac_selinux_unit_access_check(u, message, "stop", error); if (r < 0) return r; 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 *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { Unit *u = userdata; int r; assert(bus); assert(message); assert(u); r = bus_verify_manage_unit_async(u->manager, 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 = mac_selinux_unit_access_check(u, message, "reload", error); if (r < 0) return r; unit_reset_failed(u); return sd_bus_reply_method_return(message, NULL); } int bus_unit_method_set_properties(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { Unit *u = userdata; int runtime, r; assert(bus); assert(message); assert(u); r = bus_verify_manage_unit_async(u->manager, 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 = sd_bus_message_read(message, "b", &runtime); if (r < 0) return r; r = mac_selinux_unit_access_check(u, message, "start", error); if (r < 0) return r; 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); } 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, 0, 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("RequiresOverridable", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRES_OVERRIDABLE]), 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("RequisiteOverridable", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUISITE_OVERRIDABLE]), 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("RequiredByOverridable", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRED_BY_OVERRIDABLE]), 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", NULL, 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("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, 0, 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("IgnoreOnSnapshot", "b", bus_property_get_bool, offsetof(Unit, ignore_on_snapshot), 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("JobTimeoutAction", "s", property_get_failure_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_METHOD("Start", "s", "o", method_start, 0), SD_BUS_METHOD("Stop", "s", "o", method_stop, 0), SD_BUS_METHOD("Reload", "s", "o", method_reload, 0), SD_BUS_METHOD("Restart", "s", "o", method_restart, 0), SD_BUS_METHOD("TryRestart", "s", "o", method_try_restart, 0), SD_BUS_METHOD("ReloadOrRestart", "s", "o", method_reload_or_restart, 0), SD_BUS_METHOD("ReloadOrTryRestart", "s", "o", method_reload_or_try_restart, 0), SD_BUS_METHOD("Kill", "si", NULL, bus_unit_method_kill, 0), SD_BUS_METHOD("ResetFailed", NULL, NULL, bus_unit_method_reset_failed, 0), SD_BUS_METHOD("SetProperties", "ba(sv)", NULL, bus_unit_method_set_properties, 0), 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)); } 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", NULL, offsetof(Unit, cgroup_path), 0), SD_BUS_VTABLE_END }; static int send_new_signal(sd_bus *bus, void *userdata) { _cleanup_bus_message_unref_ 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 (!u) 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_VTABLE(u)->bus_interface, 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, NULL, u->sent_dbus_new_signal ? send_changed_signal : send_new_signal, u); if (r < 0) log_debug_errno(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_bus_message_unref_ 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 (!u) 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) bus_unit_send_change_signal(u); if (!u->id) return; r = bus_foreach_bus(u->manager, NULL, send_removed_signal, u); if (r < 0) log_debug_errno(r, "Failed to send unit remove signal for %s: %m", u->id); } int bus_unit_queue_job( sd_bus *bus, 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(bus); assert(message); assert(u); assert(type >= 0 && type < _JOB_TYPE_MAX); assert(mode >= 0 && mode < _JOB_MODE_MAX); 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_RELOAD; } r = mac_selinux_unit_access_check( u, message, (type == JOB_START || type == JOB_RESTART || type == JOB_TRY_RESTART) ? "start" : type == JOB_STOP ? "stop" : "reload", error); if (r < 0) return r; if (type == JOB_STOP && (u->load_state == UNIT_NOT_FOUND || u->load_state == UNIT_ERROR) && 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) || ((type == JOB_RESTART || type == JOB_TRY_RESTART) && (u->refuse_manual_start || u->refuse_manual_stop))) return sd_bus_error_setf(error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, unit %s may be requested by dependency only.", u->id); r = manager_add_job(u->manager, type, u, mode, true, error, &j); if (r < 0) return r; if (bus == u->manager->api_bus) { if (!j->clients) { r = sd_bus_track_new(bus, &j->clients, NULL, NULL); if (r < 0) return r; } r = sd_bus_track_add_sender(j->clients, 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_transient_property( Unit *u, const char *name, sd_bus_message *message, UnitSetPropertiesMode mode, sd_bus_error *error) { int r; assert(u); assert(name); assert(message); if (streq(name, "Description")) { const char *d; r = sd_bus_message_read(message, "s", &d); if (r < 0) return r; if (mode != UNIT_CHECK) { r = unit_set_description(u, d); if (r < 0) return r; unit_write_drop_in_format(u, mode, name, "[Unit]\nDescription=%s\n", d); } return 1; } else if (streq(name, "Slice") && unit_get_cgroup_context(u)) { const char *s; r = sd_bus_message_read(message, "s", &s); if (r < 0) return r; if (!unit_name_is_valid(s, TEMPLATE_INVALID) || !endswith(s, ".slice")) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid slice name %s", s); if (isempty(s)) { if (mode != UNIT_CHECK) { unit_ref_unset(&u->slice); unit_remove_drop_in(u, mode, name); } } else { Unit *slice; r = manager_load_unit(u->manager, s, NULL, error, &slice); if (r < 0) return r; if (slice->type != UNIT_SLICE) return -EINVAL; if (mode != UNIT_CHECK) { unit_ref_set(&u->slice, slice); unit_write_drop_in_private_format(u, mode, name, "Slice=%s\n", s); } } return 1; } else if (STR_IN_SET(name, "Requires", "RequiresOverridable", "Requisite", "RequisiteOverridable", "Wants", "BindsTo", "Conflicts", "Before", "After", "OnFailure", "PropagatesReloadTo", "ReloadPropagatedFrom", "PartOf")) { UnitDependency d; const char *other; d = unit_dependency_from_string(name); if (d < 0) return -EINVAL; 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, TEMPLATE_INVALID)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name %s", other); if (mode != UNIT_CHECK) { _cleanup_free_ char *label = NULL; r = unit_add_dependency_by_name(u, d, other, NULL, true); if (r < 0) return r; label = strjoin(name, "-", other, NULL); if (!label) return -ENOMEM; unit_write_drop_in_format(u, mode, label, "[Unit]\n%s=%s\n", name, other); } } if (r < 0) return r; r = sd_bus_message_exit_container(message); if (r < 0) return r; return 1; } return 0; } int bus_unit_set_properties( Unit *u, sd_bus_message *message, UnitSetPropertiesMode mode, 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; r = sd_bus_message_enter_container(message, 'r', "sv"); if (r < 0) return r; if (r == 0) { if (for_real || mode == UNIT_CHECK) 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; r = UNIT_VTABLE(u)->bus_set_property(u, name, message, for_real ? mode : UNIT_CHECK, error); if (r == 0 && u->transient && u->load_state == UNIT_STUB) r = bus_unit_set_transient_property(u, name, message, for_real ? mode : UNIT_CHECK, 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; }