+int user_kill(User *u, int signo) {
+ int r = 0, q;
+ Set *pid_set = NULL;
+
+ assert(u);
+
+ if (!u->cgroup_path)
+ return -ESRCH;
+
+ pid_set = set_new(trivial_hash_func, trivial_compare_func);
+ if (!pid_set)
+ return -ENOMEM;
+
+ q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set);
+ if (q < 0)
+ if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
+ r = q;
+
+ if (pid_set)
+ set_free(pid_set);
+
+ return r;
+}
+