/* 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 kill '$(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);
}
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_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 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 BUS_DEFINE_SET_TRANSIENT_PARSE(collect_mode, CollectMode, collect_mode_from_string);
static BUS_DEFINE_SET_TRANSIENT_PARSE(emergency_action, EmergencyAction, emergency_action_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, NULL, 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 loaded 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 */
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);
}