Merge pull request #20813 from unusual-thoughts/exittype_v2

Reintroduce ExitType

docs/TRANSIENT-SETTINGS.md

@@ -309,6 +309,7 @@ Most service unit settings are available for transient units.
 ✓ ExecStartPre=
 ✓ ExecStop=
 ✓ ExecStopPost=
+✓ ExitType=
 ✓ FileDescriptorStoreMax=
 ✓ GuessMainPID=
 ✓ NonBlocking=

man/org.freedesktop.systemd1.xml

@@ -2304,6 +2304,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly s Type = '...';
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly s ExitType = '...';
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly s Restart = '...';
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly s PIDFile = '...';
@@ -2898,6 +2900,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
 
     <!--property Type is not documented!-->
 
+    <!--property ExitType is not documented!-->
+
     <!--property Restart is not documented!-->
 
     <!--property PIDFile is not documented!-->
@@ -3428,6 +3432,8 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
 
     <variablelist class="dbus-property" generated="True" extra-ref="Type"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="ExitType"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="Restart"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="PIDFile"/>

man/systemd.service.xml

@@ -255,6 +255,31 @@
         </listitem>
       </varlistentry>
 
+      <varlistentry>
+        <term><varname>ExitType=</varname></term>
+
+        <listitem>
+          <para>Specifies when the manager should consider the service to be finished. One of <option>main</option> or
+          <option>cgroup</option>:</para>
+
+          <itemizedlist>
+            <listitem><para>If set to <option>main</option> (the default), the service manager
+            will consider the unit stopped when the main process, which is determined according to the
+            <varname>Type=</varname>, exits. Consequently, it cannot be used with
+            <varname>Type=</varname><option>oneshot</option>.</para></listitem>
+
+            <listitem><para>If set to <option>cgroup</option>, the service will be considered running as long as at
+            least one process in the cgroup has not exited.</para></listitem>
+          </itemizedlist>
+
+          <para>It is generally recommended to use <varname>ExitType=</varname><option>main</option> when a service has
+          a known forking model and a main process can reliably be determined. <varname>ExitType=</varname>
+          <option>cgroup</option> is meant for applications whose forking model is not known ahead of time and which
+          might not have a specific main process. It is well suited for transient or automatically generated services,
+          such as graphical applications inside of a desktop environment.</para>
+        </listitem>
+      </varlistentry>
+
       <varlistentry>
         <term><varname>RemainAfterExit=</varname></term>
 

shell-completion/bash/systemd-run

@@ -78,7 +78,7 @@ _systemd_run() {
         -p|--property)
             local comps='CPUAccounting= MemoryAccounting= BlockIOAccounting= SendSIGHUP=
                          SendSIGKILL= MemoryLimit= CPUShares= BlockIOWeight= User= Group=
-                         DevicePolicy= KillMode= DeviceAllow= BlockIOReadBandwidth=
+                         DevicePolicy= KillMode= ExitType= DeviceAllow= BlockIOReadBandwidth=
                          BlockIOWriteBandwidth= BlockIODeviceWeight= Nice= Environment=
                          KillSignal= RestartKillSignal= FinalKillSignal= LimitCPU= LimitFSIZE= LimitDATA=
                          LimitSTACK= LimitCORE= LimitRSS= LimitNOFILE= LimitAS= LimitNPROC=

shell-completion/zsh/_systemd-run

@@ -45,7 +45,7 @@ _arguments \
     {-p+,--property=}'[Set unit property]:NAME=VALUE:(( \
                 CPUAccounting= MemoryAccounting= BlockIOAccounting= SendSIGHUP= \
                 SendSIGKILL= MemoryLimit= CPUShares= BlockIOWeight= User= Group= \
-                DevicePolicy= KillMode= DeviceAllow= BlockIOReadBandwidth= \
+                DevicePolicy= KillMode= ExitType= DeviceAllow= BlockIOReadBandwidth= \
                 BlockIOWriteBandwidth= BlockIODeviceWeight= Nice= Environment= \
                 KillSignal= RestartKillSignal= FinalKillSignal= LimitCPU= LimitFSIZE= LimitDATA= \
                 LimitSTACK= LimitCORE= LimitRSS= LimitNOFILE= LimitAS= LimitNPROC= \

src/core/dbus-service.c

@@ -27,6 +27,7 @@
 #include "unit.h"
 
 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, service_type, ServiceType);
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_exit_type, service_exit_type, ServiceExitType);
 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, service_result, ServiceResult);
 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_restart, service_restart, ServiceRestart);
 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_notify_access, notify_access, NotifyAccess);
@@ -192,6 +193,7 @@ int bus_service_method_mount_image(sd_bus_message *message, void *userdata, sd_b
 const sd_bus_vtable bus_service_vtable[] = {
         SD_BUS_VTABLE_START(0),
         SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Service, type), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("ExitType", "s", property_get_exit_type, offsetof(Service, exit_type), SD_BUS_VTABLE_PROPERTY_CONST),
         SD_BUS_PROPERTY("Restart", "s", property_get_restart, offsetof(Service, restart), SD_BUS_VTABLE_PROPERTY_CONST),
         SD_BUS_PROPERTY("PIDFile", "s", NULL, offsetof(Service, pid_file), SD_BUS_VTABLE_PROPERTY_CONST),
         SD_BUS_PROPERTY("NotifyAccess", "s", property_get_notify_access, offsetof(Service, notify_access), SD_BUS_VTABLE_PROPERTY_CONST),
@@ -378,6 +380,7 @@ static int bus_set_transient_std_fd(
 }
 static BUS_DEFINE_SET_TRANSIENT_PARSE(notify_access, NotifyAccess, notify_access_from_string);
 static BUS_DEFINE_SET_TRANSIENT_PARSE(service_type, ServiceType, service_type_from_string);
+static BUS_DEFINE_SET_TRANSIENT_PARSE(service_exit_type, ServiceExitType, service_exit_type_from_string);
 static BUS_DEFINE_SET_TRANSIENT_PARSE(service_restart, ServiceRestart, service_restart_from_string);
 static BUS_DEFINE_SET_TRANSIENT_PARSE(oom_policy, OOMPolicy, oom_policy_from_string);
 static BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(bus_name, sd_bus_service_name_is_valid);
@@ -415,6 +418,9 @@ static int bus_service_set_transient_property(
         if (streq(name, "Type"))
                 return bus_set_transient_service_type(u, name, &s->type, message, flags, error);
 
+        if (streq(name, "ExitType"))
+                return bus_set_transient_service_exit_type(u, name, &s->exit_type, message, flags, error);
+
         if (streq(name, "OOMPolicy"))
                 return bus_set_transient_oom_policy(u, name, &s->oom_policy, message, flags, error);
 

src/core/load-fragment-gperf.gperf.in

@@ -394,6 +394,7 @@ Service.StartLimitAction,                config_parse_emergency_action,
 Service.FailureAction,                   config_parse_emergency_action,               0,                                  offsetof(Unit, failure_action)
 Service.RebootArgument,                  config_parse_unit_string_printf,             0,                                  offsetof(Unit, reboot_arg)
 Service.Type,                            config_parse_service_type,                   0,                                  offsetof(Service, type)
+Service.ExitType,                        config_parse_service_exit_type,              0,                                  offsetof(Service, exit_type)
 Service.Restart,                         config_parse_service_restart,                0,                                  offsetof(Service, restart)
 Service.PermissionsStartOnly,            config_parse_bool,                           0,                                  offsetof(Service, permissions_start_only)
 Service.RootDirectoryStartOnly,          config_parse_bool,                           0,                                  offsetof(Service, root_directory_start_only)

src/core/load-fragment.c

@@ -136,6 +136,7 @@ DEFINE_CONFIG_PARSE_ENUM(config_parse_protect_home, protect_home, ProtectHome, "
 DEFINE_CONFIG_PARSE_ENUM(config_parse_protect_system, protect_system, ProtectSystem, "Failed to parse protect system value");
 DEFINE_CONFIG_PARSE_ENUM(config_parse_runtime_preserve_mode, exec_preserve_mode, ExecPreserveMode, "Failed to parse runtime directory preserve mode");
 DEFINE_CONFIG_PARSE_ENUM(config_parse_service_type, service_type, ServiceType, "Failed to parse service type");
+DEFINE_CONFIG_PARSE_ENUM(config_parse_service_exit_type, service_exit_type, ServiceExitType, "Failed to parse service exit type");
 DEFINE_CONFIG_PARSE_ENUM(config_parse_service_restart, service_restart, ServiceRestart, "Failed to parse service restart specifier");
 DEFINE_CONFIG_PARSE_ENUM(config_parse_service_timeout_failure_mode, service_timeout_failure_mode, ServiceTimeoutFailureMode, "Failed to parse timeout failure mode");
 DEFINE_CONFIG_PARSE_ENUM(config_parse_socket_bind, socket_address_bind_ipv6_only_or_bool, SocketAddressBindIPv6Only, "Failed to parse bind IPv6 only value");
@@ -6194,6 +6195,7 @@ void unit_dump_config_items(FILE *f) {
                 { config_parse_unit_deps,             "UNIT [...]" },
                 { config_parse_exec,                  "PATH [ARGUMENT [...]]" },
                 { config_parse_service_type,          "SERVICETYPE" },
+                { config_parse_service_exit_type,     "SERVICEEXITTYPE" },
                 { config_parse_service_restart,       "SERVICERESTART" },
                 { config_parse_service_timeout_failure_mode, "TIMEOUTMODE" },
                 { config_parse_kill_mode,             "KILLMODE" },

src/core/load-fragment.h

@@ -37,6 +37,7 @@ CONFIG_PARSER_PROTOTYPE(config_parse_service_timeout);
 CONFIG_PARSER_PROTOTYPE(config_parse_service_timeout_abort);
 CONFIG_PARSER_PROTOTYPE(config_parse_service_timeout_failure_mode);
 CONFIG_PARSER_PROTOTYPE(config_parse_service_type);
+CONFIG_PARSER_PROTOTYPE(config_parse_service_exit_type);
 CONFIG_PARSER_PROTOTYPE(config_parse_service_restart);
 CONFIG_PARSER_PROTOTYPE(config_parse_socket_bindtodevice);
 CONFIG_PARSER_PROTOTYPE(config_parse_exec_output);

src/core/service.c

@@ -602,6 +602,9 @@ static int service_verify(Service *s) {
         if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status))
                 return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
 
+        if (s->type == SERVICE_ONESHOT && s->exit_type == SERVICE_EXIT_CGROUP)
+                return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Service has ExitType=cgroup set, which isn't allowed for Type=oneshot services. Refusing.");
+
         if (s->type == SERVICE_DBUS && !s->bus_name)
                 return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
 
@@ -3289,6 +3292,9 @@ static void service_notify_cgroup_empty_event(Unit *u) {
                         break;
                 }
 
+                if (s->exit_type == SERVICE_EXIT_CGROUP && main_pid_good(s) <= 0)
+                        service_enter_start_post(s);
+
                 _fallthrough_;
         case SERVICE_START_POST:
                 if (s->pid_file_pathspec &&
@@ -3477,79 +3483,82 @@ static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
                         service_run_next_main(s);
 
                 } else {
-
-                        /* The service exited, so the service is officially gone. */
                         s->main_command = NULL;
 
-                        switch (s->state) {
+                        /* Services with ExitType=cgroup do not act on main PID exiting,
+                         * unless the cgroup is already empty */
+                        if (s->exit_type == SERVICE_EXIT_MAIN || cgroup_good(s) <= 0) {
+                                /* The service exited, so the service is officially gone. */
+                                switch (s->state) {
 
-                        case SERVICE_START_POST:
+                                case SERVICE_START_POST:
-                        case SERVICE_RELOAD:
+                                case SERVICE_RELOAD:
-                                /* If neither main nor control processes are running then
+                                        /* If neither main nor control processes are running then
-                                 * the current state can never exit cleanly, hence immediately
+                                         * the current state can never exit cleanly, hence immediately
-                                 * terminate the service. */
+                                         * terminate the service. */
-                                if (control_pid_good(s) <= 0)
+                                        if (control_pid_good(s) <= 0)
-                                        service_enter_stop(s, f);
+                                                service_enter_stop(s, f);
 
-                                /* Otherwise need to wait until the operation is done. */
+                                        /* Otherwise need to wait until the operation is done. */
-                                break;
-
-                        case SERVICE_STOP:
-                                /* Need to wait until the operation is done. */
-                                break;
-
-                        case SERVICE_START:
-                                if (s->type == SERVICE_ONESHOT) {
-                                        /* This was our main goal, so let's go on */
-                                        if (f == SERVICE_SUCCESS)
-                                                service_enter_start_post(s);
-                                        else
-                                                service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
                                         break;
-                                } else if (s->type == SERVICE_NOTIFY) {
+
-                                        /* Only enter running through a notification, so that the
+                                case SERVICE_STOP:
-                                         * SERVICE_START state signifies that no ready notification
+                                        /* Need to wait until the operation is done. */
-                                         * has been received */
-                                        if (f != SERVICE_SUCCESS)
-                                                service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
-                                        else if (!s->remain_after_exit || s->notify_access == NOTIFY_MAIN)
-                                                /* The service has never been and will never be active */
-                                                service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
                                         break;
+
+                                case SERVICE_START:
+                                        if (s->type == SERVICE_ONESHOT) {
+                                                /* This was our main goal, so let's go on */
+                                                if (f == SERVICE_SUCCESS)
+                                                        service_enter_start_post(s);
+                                                else
+                                                        service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
+                                                break;
+                                        } else if (s->type == SERVICE_NOTIFY) {
+                                                /* Only enter running through a notification, so that the
+                                                 * SERVICE_START state signifies that no ready notification
+                                                 * has been received */
+                                                if (f != SERVICE_SUCCESS)
+                                                        service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
+                                                else if (!s->remain_after_exit || s->notify_access == NOTIFY_MAIN)
+                                                        /* The service has never been and will never be active */
+                                                        service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
+                                                break;
+                                        }
+
+                                        _fallthrough_;
+                                case SERVICE_RUNNING:
+                                        service_enter_running(s, f);
+                                        break;
+
+                                case SERVICE_STOP_WATCHDOG:
+                                case SERVICE_STOP_SIGTERM:
+                                case SERVICE_STOP_SIGKILL:
+
+                                        if (control_pid_good(s) <= 0)
+                                                service_enter_stop_post(s, f);
+
+                                        /* If there is still a control process, wait for that first */
+                                        break;
+
+                                case SERVICE_STOP_POST:
+
+                                        if (control_pid_good(s) <= 0)
+                                                service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
+
+                                        break;
+
+                                case SERVICE_FINAL_WATCHDOG:
+                                case SERVICE_FINAL_SIGTERM:
+                                case SERVICE_FINAL_SIGKILL:
+
+                                        if (control_pid_good(s) <= 0)
+                                                service_enter_dead(s, f, true);
+                                        break;
+
+                                default:
+                                        assert_not_reached();
                                 }
-
-                                _fallthrough_;
-                        case SERVICE_RUNNING:
-                                service_enter_running(s, f);
-                                break;
-
-                        case SERVICE_STOP_WATCHDOG:
-                        case SERVICE_STOP_SIGTERM:
-                        case SERVICE_STOP_SIGKILL:
-
-                                if (control_pid_good(s) <= 0)
-                                        service_enter_stop_post(s, f);
-
-                                /* If there is still a control process, wait for that first */
-                                break;
-
-                        case SERVICE_STOP_POST:
-
-                                if (control_pid_good(s) <= 0)
-                                        service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
-
-                                break;
-
-                        case SERVICE_FINAL_WATCHDOG:
-                        case SERVICE_FINAL_SIGTERM:
-                        case SERVICE_FINAL_SIGKILL:
-
-                                if (control_pid_good(s) <= 0)
-                                        service_enter_dead(s, f, true);
-                                break;
-
-                        default:
-                                assert_not_reached();
                         }
                 }
 
@@ -4513,6 +4522,13 @@ static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
 
 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
 
+static const char* const service_exit_type_table[_SERVICE_EXIT_TYPE_MAX] = {
+        [SERVICE_EXIT_MAIN] = "main",
+        [SERVICE_EXIT_CGROUP] = "cgroup",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(service_exit_type, ServiceExitType);
+
 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
         [SERVICE_EXEC_CONDITION]  = "ExecCondition",
         [SERVICE_EXEC_START_PRE]  = "ExecStartPre",

src/core/service.h

@@ -35,6 +35,13 @@ typedef enum ServiceType {
         _SERVICE_TYPE_INVALID = -EINVAL,
 } ServiceType;
 
+typedef enum ServiceExitType {
+        SERVICE_EXIT_MAIN,    /* we consider the main PID when deciding if the service exited */
+        SERVICE_EXIT_CGROUP,  /* we wait for the last process in the cgroup to exit */
+        _SERVICE_EXIT_TYPE_MAX,
+        _SERVICE_EXIT_TYPE_INVALID = -EINVAL,
+} ServiceExitType;
+
 typedef enum ServiceExecCommand {
         SERVICE_EXEC_CONDITION,
         SERVICE_EXEC_START_PRE,
@@ -97,6 +104,7 @@ struct Service {
         Unit meta;
 
         ServiceType type;
+        ServiceExitType exit_type;
         ServiceRestart restart;
         ExitStatusSet restart_prevent_status;
         ExitStatusSet restart_force_status;
@@ -227,6 +235,9 @@ ServiceRestart service_restart_from_string(const char *s) _pure_;
 const char* service_type_to_string(ServiceType i) _const_;
 ServiceType service_type_from_string(const char *s) _pure_;
 
+const char* service_exit_type_to_string(ServiceExitType i) _const_;
+ServiceExitType service_exit_type_from_string(const char *s) _pure_;
+
 const char* service_exec_command_to_string(ServiceExecCommand i) _const_;
 ServiceExecCommand service_exec_command_from_string(const char *s) _pure_;
 

src/shared/bus-unit-util.c

@@ -2132,6 +2132,7 @@ static int bus_append_service_property(sd_bus_message *m, const char *field, con
 
         if (STR_IN_SET(field, "PIDFile",
                               "Type",
+                              "ExitType",
                               "Restart",
                               "BusName",
                               "NotifyAccess",

src/xdg-autostart-generator/xdg-autostart-service.c

@@ -597,6 +597,7 @@ int xdg_autostart_service_generate_unit(
         fprintf(f,
                 "\n[Service]\n"
                 "Type=exec\n"
+                "ExitType=cgroup\n"
                 "ExecStart=:%s\n"
                 "Restart=no\n"
                 "TimeoutSec=5s\n"

test/TEST-56-EXIT-TYPE/Makefile

@@ -0,0 +1 @@
+../TEST-01-BASIC/Makefile

test/TEST-56-EXIT-TYPE/test.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -e
+
+TEST_DESCRIPTION="test ExitType=cgroup"
+
+# shellcheck source=test/test-functions
+. "${TEST_BASE_DIR:?}/test-functions"
+
+do_test "$@"

test/fuzz/fuzz-unit-file/directives.service

@@ -161,6 +161,7 @@ ExecStartPost=
 ExecStartPre=
 ExecStop=
 ExecStopPost=
+ExitType=
 ExtensionImages=
 FailureAction=
 FileDescriptorStoreMax=

test/units/testsuite-56.service

@@ -0,0 +1,6 @@
+[Unit]
+Description=TEST-56-EXIT-TYPE
+
+[Service]
+ExecStart=/usr/lib/systemd/tests/testdata/units/%N.sh
+Type=oneshot

test/units/testsuite-56.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+set -eux
+
+systemd-analyze log-level debug
+
+# Multiple level process tree, parent process stays up
+cat >/tmp/test56-exit-cgroup.sh <<EOF
+#!/usr/bin/env bash
+set -eux
+
+# process tree: systemd -> sleep
+sleep infinity &
+disown
+
+# process tree: systemd -> bash -> bash -> sleep
+((sleep infinity); true) &
+
+systemd-notify --ready
+
+# process tree: systemd -> bash -> sleep
+sleep infinity
+EOF
+chmod +x /tmp/test56-exit-cgroup.sh
+
+# service should be stopped cleanly
+systemd-run --wait --unit=one -p Type=notify -p ExitType=cgroup \
+    -p ExecStartPost='bash -c "systemctl stop one &"' \
+    /tmp/test56-exit-cgroup.sh
+
+# same thing with a truthy exec condition
+systemd-run --wait --unit=two -p Type=notify -p ExitType=cgroup \
+    -p ExecCondition=true \
+    -p ExecStartPost='bash -c "systemctl stop two &"' \
+    /tmp/test56-exit-cgroup.sh
+
+# false exec condition: systemd-run should exit immediately with status code: 1
+systemd-run --wait --unit=three -p Type=notify -p ExitType=cgroup \
+    -p ExecCondition=false \
+    /tmp/test56-exit-cgroup.sh \
+    && { echo 'unexpected success'; exit 1; }
+
+# service should exit uncleanly (main process exits with SIGKILL)
+systemd-run --wait --unit=four -p Type=notify -p ExitType=cgroup \
+    -p ExecStartPost='bash -c "systemctl kill --signal 9 four &"' \
+    /tmp/test56-exit-cgroup.sh \
+    && { echo 'unexpected success'; exit 1; }
+
+
+# Multiple level process tree, parent process exits quickly
+cat >/tmp/test56-exit-cgroup-parentless.sh <<EOF
+#!/usr/bin/env bash
+set -eux
+
+# process tree: systemd -> sleep
+sleep infinity &
+
+# process tree: systemd -> bash -> sleep
+((sleep infinity); true) &
+
+systemd-notify --ready
+EOF
+chmod +x /tmp/test56-exit-cgroup-parentless.sh
+
+# service should be stopped cleanly
+systemd-run --wait --unit=five -p Type=notify -p ExitType=cgroup \
+    -p ExecStartPost='bash -c "systemctl stop five &"' \
+    /tmp/test56-exit-cgroup-parentless.sh
+
+# service should still exit cleanly despite SIGKILL (the main process already exited cleanly)
+systemd-run --wait --unit=six -p Type=notify -p ExitType=cgroup \
+    -p ExecStartPost='bash -c "systemctl kill --signal 9 six &"' \
+    /tmp/test56-exit-cgroup-parentless.sh
+
+
+systemd-analyze log-level info
+
+echo OK >/testok
+
+exit 0