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-rw-r--r--src/core/dbus-unit.c32
-rw-r--r--src/systemctl/systemctl.c11
2 files changed, 34 insertions, 9 deletions
diff --git a/src/core/dbus-unit.c b/src/core/dbus-unit.c
index 1892725f91..0a9effda71 100644
--- a/src/core/dbus-unit.c
+++ b/src/core/dbus-unit.c
@@ -697,10 +697,40 @@ static int property_get_cpu_usage(
return sd_bus_message_append(reply, "t", ns);
}
+static int property_get_cgroup(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ Unit *u = userdata;
+ const char *t;
+
+ 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 = isempty(u->cgroup_path) ? "/" : u->cgroup_path;
+ else
+ t = "";
+
+ return sd_bus_message_append(reply, "s", t);
+}
+
const sd_bus_vtable bus_unit_cgroup_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_PROPERTY("Slice", "s", property_get_slice, 0, 0),
- SD_BUS_PROPERTY("ControlGroup", "s", NULL, offsetof(Unit, cgroup_path), 0),
+ SD_BUS_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_VTABLE_END
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 587793fb17..3cb5f61868 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -3635,14 +3635,7 @@ static int status_property(const char *name, sd_bus_message *m, UnitStatusInfo *
if (r < 0)
return bus_log_parse_error(r);
- if (streq(name, "ControlGroup"))
- i->control_group = s;
- else if (!isempty(s)) {
- /* For all but the cgroup path (see above) we
- * consider the empty string as unset. For the
- * cgroup path the empty string refers to the
- * root of the cgroup tree. */
-
+ if (!isempty(s)) {
if (streq(name, "Id"))
i->id = s;
else if (streq(name, "LoadState"))
@@ -3665,6 +3658,8 @@ static int status_property(const char *name, sd_bus_message *m, UnitStatusInfo *
i->control_group = e;
}
#endif
+ else if (streq(name, "ControlGroup"))
+ i->control_group = s;
else if (streq(name, "StatusText"))
i->status_text = s;
else if (streq(name, "PIDFile"))