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-rw-r--r--src/core/dbus-unit.c2475
1 files changed, 2475 insertions, 0 deletions
diff --git a/src/core/dbus-unit.c b/src/core/dbus-unit.c
new file mode 100644
index 0000000..427152a
--- /dev/null
+++ b/src/core/dbus-unit.c
@@ -0,0 +1,2475 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "sd-bus.h"
+
+#include "alloc-util.h"
+#include "bpf-firewall.h"
+#include "bus-common-errors.h"
+#include "bus-get-properties.h"
+#include "bus-polkit.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 "install.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-table.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_GET2(property_get_freezer_state, "s", Unit, unit_freezer_state, freezer_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_can_freeze, "b", Unit, unit_can_freeze);
+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_can_clean(
+ 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;
+ ExecCleanMask mask;
+ int r;
+
+ assert(bus);
+ assert(reply);
+
+ r = unit_can_clean(u, &mask);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'a', "s");
+ if (r < 0)
+ return r;
+
+ for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) {
+ if (!FLAGS_SET(mask, 1U << t))
+ continue;
+
+ r = sd_bus_message_append(reply, "s", exec_resource_type_to_string(t));
+ if (r < 0)
+ return r;
+ }
+
+ return sd_bus_message_close_container(reply);
+}
+
+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;
+ 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;
+
+ r = sd_bus_message_append(reply, "s", u->id);
+ if (r < 0)
+ return r;
+
+ SET_FOREACH(t, u->aliases) {
+ 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;
+ 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) {
+ 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;
+ 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) {
+ 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);
+}
+
+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 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, *verb;
+ JobMode mode;
+ 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 = strjoina("reload-or-", job_type_to_string(job_type));
+ else
+ verb = job_type_to_string(job_type);
+
+ r = bus_verify_manage_units_async_full(
+ u,
+ verb,
+ CAP_SYS_ADMIN,
+ polkit_message_for_job[job_type],
+ 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 ? BUS_UNIT_QUEUE_RELOAD_IF_POSSIBLE : 0, 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_enqueue_job(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ BusUnitQueueFlags flags = BUS_UNIT_QUEUE_VERBOSE_REPLY;
+ const char *jtype, *smode;
+ Unit *u = userdata;
+ JobType type;
+ JobMode mode;
+ int r;
+
+ assert(message);
+ assert(u);
+
+ r = sd_bus_message_read(message, "ss", &jtype, &smode);
+ if (r < 0)
+ return r;
+
+ /* Parse the two magic reload types "reload-or-…" manually */
+ if (streq(jtype, "reload-or-restart")) {
+ type = JOB_RESTART;
+ flags |= BUS_UNIT_QUEUE_RELOAD_IF_POSSIBLE;
+ } else if (streq(jtype, "reload-or-try-restart")) {
+ type = JOB_TRY_RESTART;
+ flags |= BUS_UNIT_QUEUE_RELOAD_IF_POSSIBLE;
+ } else {
+ /* And the rest generically */
+ type = job_type_from_string(jtype);
+ if (type < 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Job type %s invalid", jtype);
+ }
+
+ 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);
+
+ r = mac_selinux_unit_access_check(
+ u, message,
+ job_type_to_access_method(type),
+ error);
+ if (r < 0)
+ return r;
+
+ r = bus_verify_manage_units_async_full(
+ u,
+ jtype,
+ CAP_SYS_ADMIN,
+ polkit_message_for_job[type],
+ 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, type, mode, flags, 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);
+}
+
+int bus_unit_method_clean(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ ExecCleanMask mask = 0;
+ Unit *u = userdata;
+ 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_enter_container(message, 'a', "s");
+ if (r < 0)
+ return r;
+
+ for (;;) {
+ const char *i;
+
+ r = sd_bus_message_read(message, "s", &i);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ if (streq(i, "all"))
+ mask |= EXEC_CLEAN_ALL;
+ else {
+ ExecDirectoryType t;
+
+ t = exec_resource_type_from_string(i);
+ if (t < 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid resource type: %s", i);
+
+ mask |= 1U << t;
+ }
+ }
+
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ return r;
+
+ r = bus_verify_manage_units_async_full(
+ u,
+ "clean",
+ CAP_DAC_OVERRIDE,
+ N_("Authentication is required to delete files and directories associated with '$(unit)'."),
+ true,
+ message,
+ error);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
+
+ r = unit_clean(u, mask);
+ if (r == -EOPNOTSUPP)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Unit '%s' does not supporting cleaning.", u->id);
+ if (r == -EUNATCH)
+ return sd_bus_error_setf(error, BUS_ERROR_NOTHING_TO_CLEAN, "No matching resources found.");
+ if (r == -EBUSY)
+ return sd_bus_error_setf(error, BUS_ERROR_UNIT_BUSY, "Unit is not inactive or has pending job.");
+ if (r < 0)
+ return r;
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+static int bus_unit_method_freezer_generic(sd_bus_message *message, void *userdata, sd_bus_error *error, FreezerAction action) {
+ const char* perm;
+ int (*method)(Unit*);
+ Unit *u = userdata;
+ bool reply_no_delay = false;
+ int r;
+
+ assert(message);
+ assert(u);
+ assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW));
+
+ if (action == FREEZER_FREEZE) {
+ perm = "stop";
+ method = unit_freeze;
+ } else {
+ perm = "start";
+ method = unit_thaw;
+ }
+
+ r = mac_selinux_unit_access_check(u, message, perm, error);
+ if (r < 0)
+ return r;
+
+ r = bus_verify_manage_units_async_full(
+ u,
+ perm,
+ CAP_SYS_ADMIN,
+ N_("Authentication is required to freeze or thaw the processes of '$(unit)' 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 = method(u);
+ if (r == -EOPNOTSUPP)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Unit '%s' does not support freezing.", u->id);
+ if (r == -EBUSY)
+ return sd_bus_error_setf(error, BUS_ERROR_UNIT_BUSY, "Unit has a pending job.");
+ if (r == -EHOSTDOWN)
+ return sd_bus_error_setf(error, BUS_ERROR_UNIT_INACTIVE, "Unit is inactive.");
+ if (r == -EALREADY)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_FAILED, "Previously requested freezer operation for unit '%s' is still in progress.", u->id);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ reply_no_delay = true;
+
+ assert(!u->pending_freezer_message);
+
+ r = sd_bus_message_new_method_return(message, &u->pending_freezer_message);
+ if (r < 0)
+ return r;
+
+ if (reply_no_delay) {
+ r = bus_unit_send_pending_freezer_message(u);
+ if (r < 0)
+ return r;
+ }
+
+ return 1;
+}
+
+int bus_unit_method_thaw(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ return bus_unit_method_freezer_generic(message, userdata, error, FREEZER_THAW);
+}
+
+int bus_unit_method_freeze(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ return bus_unit_method_freezer_generic(message, userdata, error, FREEZER_FREEZE);
+}
+
+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, 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("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("FreezerState", "s", property_get_freezer_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("CanClean", "as", property_get_can_clean, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("CanFreeze", "b", property_get_can_freeze, 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), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
+ SD_BUS_PROPERTY("Asserts", "a(sbbsi)", property_get_conditions, offsetof(Unit, asserts), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
+ 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_ratelimit.interval), SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("StartLimitBurst", "u", bus_property_get_unsigned, offsetof(Unit, start_ratelimit.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("FailureActionExitStatus", "i", bus_property_get_int, offsetof(Unit, failure_action_exit_status), 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("SuccessActionExitStatus", "i", bus_property_get_int, offsetof(Unit, success_action_exit_status), 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), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+ SD_BUS_PROPERTY("CollectMode", "s", property_get_collect_mode, offsetof(Unit, collect_mode), SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("Refs", "as", property_get_refs, 0, 0),
+
+ SD_BUS_METHOD_WITH_NAMES("Start",
+ "s",
+ SD_BUS_PARAM(mode),
+ "o",
+ SD_BUS_PARAM(job),
+ method_start,
+ SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD_WITH_NAMES("Stop",
+ "s",
+ SD_BUS_PARAM(mode),
+ "o",
+ SD_BUS_PARAM(job),
+ method_stop,
+ SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD_WITH_NAMES("Reload",
+ "s",
+ SD_BUS_PARAM(mode),
+ "o",
+ SD_BUS_PARAM(job),
+ method_reload,
+ SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD_WITH_NAMES("Restart",
+ "s",
+ SD_BUS_PARAM(mode),
+ "o",
+ SD_BUS_PARAM(job),
+ method_restart,
+ SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD_WITH_NAMES("TryRestart",
+ "s",
+ SD_BUS_PARAM(mode),
+ "o",
+ SD_BUS_PARAM(job),
+ method_try_restart,
+ SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD_WITH_NAMES("ReloadOrRestart",
+ "s",
+ SD_BUS_PARAM(mode),
+ "o",
+ SD_BUS_PARAM(job),
+ method_reload_or_restart,
+ SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD_WITH_NAMES("ReloadOrTryRestart",
+ "s",
+ SD_BUS_PARAM(mode),
+ "o",
+ SD_BUS_PARAM(job),
+ method_reload_or_try_restart,
+ SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD_WITH_NAMES("EnqueueJob",
+ "ss",
+ SD_BUS_PARAM(job_type)
+ SD_BUS_PARAM(job_mode),
+ "uososa(uosos)",
+ SD_BUS_PARAM(job_id)
+ SD_BUS_PARAM(job_path)
+ SD_BUS_PARAM(unit_id)
+ SD_BUS_PARAM(unit_path)
+ SD_BUS_PARAM(job_type)
+ SD_BUS_PARAM(affected_jobs),
+ bus_unit_method_enqueue_job,
+ SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD_WITH_NAMES("Kill",
+ "si",
+ SD_BUS_PARAM(whom)
+ SD_BUS_PARAM(signal),
+ 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_WITH_NAMES("SetProperties",
+ "ba(sv)",
+ SD_BUS_PARAM(runtime)
+ SD_BUS_PARAM(properties),
+ 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),
+ SD_BUS_METHOD_WITH_NAMES("Clean",
+ "as",
+ SD_BUS_PARAM(mask),
+ NULL,,
+ bus_unit_method_clean,
+ SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("Freeze",
+ NULL,
+ NULL,
+ bus_unit_method_freeze,
+ SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("Thaw",
+ NULL,
+ NULL,
+ bus_unit_method_thaw,
+ 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_ratelimit.interval), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
+ SD_BUS_PROPERTY("StartLimitIntervalSec", "t", bus_property_get_usec, offsetof(Unit, start_ratelimit.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_cpuset_cpus(
+ 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;
+ _cleanup_(cpu_set_reset) CPUSet cpus = {};
+ _cleanup_free_ uint8_t *array = NULL;
+ size_t allocated;
+
+ assert(bus);
+ assert(reply);
+ assert(u);
+
+ (void) unit_get_cpuset(u, &cpus, "cpuset.cpus.effective");
+ (void) cpu_set_to_dbus(&cpus, &array, &allocated);
+ return sd_bus_message_append_array(reply, 'y', array, allocated);
+}
+
+static int property_get_cpuset_mems(
+ 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;
+ _cleanup_(cpu_set_reset) CPUSet mems = {};
+ _cleanup_free_ uint8_t *array = NULL;
+ size_t allocated;
+
+ assert(bus);
+ assert(reply);
+ assert(u);
+
+ (void) unit_get_cpuset(u, &mems, "cpuset.mems.effective");
+ (void) cpu_set_to_dbus(&mems, &array, &allocated);
+ return sd_bus_message_append_array(reply, 'y', array, allocated);
+}
+
+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, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &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 = path_join(empty_to_root(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) {
+
+ static const char *const table[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = {
+ [CGROUP_IP_INGRESS_BYTES] = "IPIngressBytes",
+ [CGROUP_IP_EGRESS_BYTES] = "IPEgressBytes",
+ [CGROUP_IP_INGRESS_PACKETS] = "IPIngressPackets",
+ [CGROUP_IP_EGRESS_PACKETS] = "IPEgressPackets",
+ };
+
+ uint64_t value = UINT64_MAX;
+ Unit *u = userdata;
+ ssize_t metric;
+
+ assert(bus);
+ assert(reply);
+ assert(property);
+ assert(u);
+
+ assert_se((metric = string_table_lookup(table, ELEMENTSOF(table), property)) >= 0);
+ (void) unit_get_ip_accounting(u, metric, &value);
+ return sd_bus_message_append(reply, "t", value);
+}
+
+static int property_get_io_counter(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ static const char *const table[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = {
+ [CGROUP_IO_READ_BYTES] = "IOReadBytes",
+ [CGROUP_IO_WRITE_BYTES] = "IOWriteBytes",
+ [CGROUP_IO_READ_OPERATIONS] = "IOReadOperations",
+ [CGROUP_IO_WRITE_OPERATIONS] = "IOWriteOperations",
+ };
+
+ uint64_t value = UINT64_MAX;
+ Unit *u = userdata;
+ ssize_t metric;
+
+ assert(bus);
+ assert(reply);
+ assert(property);
+ assert(u);
+
+ assert_se((metric = string_table_lookup(table, ELEMENTSOF(table), property)) >= 0);
+ (void) unit_get_io_accounting(u, metric, false, &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("EffectiveCPUs", "ay", property_get_cpuset_cpus, 0, 0),
+ SD_BUS_PROPERTY("EffectiveMemoryNodes", "ay", property_get_cpuset_mems, 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_PROPERTY("IOReadBytes", "t", property_get_io_counter, 0, 0),
+ SD_BUS_PROPERTY("IOReadOperations", "t", property_get_io_counter, 0, 0),
+ SD_BUS_PROPERTY("IOWriteBytes", "t", property_get_io_counter, 0, 0),
+ SD_BUS_PROPERTY("IOWriteOperations", "t", property_get_io_counter, 0, 0),
+
+ SD_BUS_METHOD_WITH_NAMES("GetProcesses",
+ NULL,,
+ "a(sus)",
+ SD_BUS_PARAM(processes),
+ bus_unit_method_get_processes,
+ SD_BUS_VTABLE_UNPRIVILEGED),
+
+ SD_BUS_METHOD_WITH_NAMES("AttachProcesses",
+ "sau",
+ SD_BUS_PARAM(subcgroup)
+ SD_BUS_PARAM(pids),
+ 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;
+}
+
+void bus_unit_send_pending_change_signal(Unit *u, bool including_new) {
+
+ /* Sends out any pending change signals, but only if they really are pending. This call is used when we are
+ * about to change state in order to force out a PropertiesChanged signal beforehand if there was one pending
+ * so that clients can follow the full state transition */
+
+ if (!u->in_dbus_queue) /* If not enqueued, don't bother */
+ return;
+
+ if (!u->sent_dbus_new_signal && !including_new) /* If the unit was never announced, don't bother, it's fine if
+ * the unit appears in the new state right-away (except if the
+ * caller explicitly asked us to send it anyway) */
+ return;
+
+ if (MANAGER_IS_RELOADING(u->manager)) /* Don't generate unnecessary PropertiesChanged signals for the same unit
+ * when we are reloading. */
+ return;
+
+ bus_unit_send_change_signal(u);
+}
+
+int bus_unit_send_pending_freezer_message(Unit *u) {
+ int r;
+
+ assert(u);
+
+ if (!u->pending_freezer_message)
+ return 0;
+
+ r = sd_bus_send(NULL, u->pending_freezer_message, NULL);
+ if (r < 0)
+ log_warning_errno(r, "Failed to send queued message, ignoring: %m");
+
+ u->pending_freezer_message = sd_bus_message_unref(u->pending_freezer_message);
+
+ return 0;
+}
+
+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,
+ BusUnitQueueFlags flags,
+ sd_bus_error *error) {
+
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ _cleanup_free_ char *job_path = NULL, *unit_path = NULL;
+ _cleanup_set_free_ Set *affected = NULL;
+ Job *j, *a;
+ 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 (FLAGS_SET(flags, BUS_UNIT_QUEUE_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);
+
+ if (FLAGS_SET(flags, BUS_UNIT_QUEUE_VERBOSE_REPLY)) {
+ affected = set_new(NULL);
+ if (!affected)
+ return -ENOMEM;
+ }
+
+ r = manager_add_job(u->manager, type, u, mode, affected, error, &j);
+ if (r < 0)
+ return r;
+
+ r = bus_job_track_sender(j, message);
+ if (r < 0)
+ return r;
+
+ /* Before we send the method reply, force out the announcement JobNew for this job */
+ bus_job_send_pending_change_signal(j, true);
+
+ job_path = job_dbus_path(j);
+ if (!job_path)
+ return -ENOMEM;
+
+ /* The classic response is just a job object path */
+ if (!FLAGS_SET(flags, BUS_UNIT_QUEUE_VERBOSE_REPLY))
+ return sd_bus_reply_method_return(message, "o", job_path);
+
+ /* In verbose mode respond with the anchor job plus everything that has been affected */
+ r = sd_bus_message_new_method_return(message, &reply);
+ if (r < 0)
+ return r;
+
+ unit_path = unit_dbus_path(j->unit);
+ if (!unit_path)
+ return -ENOMEM;
+
+ r = sd_bus_message_append(reply, "uosos",
+ j->id, job_path,
+ j->unit->id, unit_path,
+ job_type_to_string(j->type));
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'a', "(uosos)");
+ if (r < 0)
+ return r;
+
+ SET_FOREACH(a, affected) {
+
+ if (a->id == j->id)
+ continue;
+
+ /* Free paths from previous iteration */
+ job_path = mfree(job_path);
+ unit_path = mfree(unit_path);
+
+ job_path = job_dbus_path(a);
+ if (!job_path)
+ return -ENOMEM;
+
+ unit_path = unit_dbus_path(a->unit);
+ if (!unit_path)
+ return -ENOMEM;
+
+ r = sd_bus_message_append(reply, "(uosos)",
+ a->id, job_path,
+ a->unit->id, unit_path,
+ job_type_to_string(a->type));
+ 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 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 (r < 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
+ r == -EOPNOTSUPP ? "%s 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 int bus_set_transient_exit_status(
+ Unit *u,
+ const char *name,
+ int *p,
+ sd_bus_message *message,
+ UnitWriteFlags flags,
+ sd_bus_error *error) {
+
+ int32_t k;
+ int r;
+
+ assert(p);
+
+ r = sd_bus_message_read(message, "i", &k);
+ if (r < 0)
+ return r;
+
+ if (k > 255)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Exit status must be in range 0…255 or negative.");
+
+ if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
+ *p = k < 0 ? -1 : k;
+
+ if (k < 0)
+ unit_write_settingf(u, flags, name, "%s=", name);
+ else
+ unit_write_settingf(u, flags, name, "%s=%i", name, k);
+ }
+
+ 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, &param)) > 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 (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);
+
+ if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
+ Condition *c;
+
+ c = condition_new(t, param, trigger, negate);
+ if (!c)
+ return -ENOMEM;
+
+ LIST_PREPEND(conditions, *list, c);
+
+ unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name,
+ "%s=%s%s%s", type_name,
+ trigger ? "|" : "", negate ? "!" : "", param);
+ }
+
+ 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_ratelimit.interval, message, flags, error);
+
+ if (streq(name, "StartLimitBurst"))
+ return bus_set_transient_unsigned(u, name, &u->start_ratelimit.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, "FailureActionExitStatus"))
+ return bus_set_transient_exit_status(u, name, &u->failure_action_exit_status, message, flags, error);
+
+ if (streq(name, "SuccessActionExitStatus"))
+ return bus_set_transient_exit_status(u, name, &u->success_action_exit_status, 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) {
+ path_simplify(*p, true);
+
+ 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 (!path_is_valid(*p))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path specified in %s has invalid length: %s", name, *p);
+
+ if (!path_is_normalized(*p))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path specified in %s is not normalized: %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;
+
+ if (!IN_SET(d,
+ UNIT_REQUIRES,
+ UNIT_REQUISITE,
+ UNIT_WANTS,
+ UNIT_BINDS_TO,
+ UNIT_PART_OF,
+ UNIT_CONFLICTS,
+ UNIT_BEFORE,
+ UNIT_AFTER,
+ UNIT_ON_FAILURE,
+ UNIT_PROPAGATES_RELOAD_TO,
+ UNIT_RELOAD_PROPAGATED_FROM,
+ UNIT_JOINS_NAMESPACE_OF))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Dependency type %s may not be created transiently.", unit_dependency_to_string(d));
+
+ 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 actually 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);
+}