+int unit_kill_common(
+ Unit *u,
+ KillWho who,
+ int signo,
+ pid_t main_pid,
+ pid_t control_pid,
+ DBusError *error) {
+
+ int r = 0;
+
+ if (who == KILL_MAIN && main_pid <= 0) {
+ if (main_pid < 0)
+ dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type));
+ else
+ dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
+ return -ESRCH;
+ }
+
+ if (who == KILL_CONTROL && control_pid <= 0) {
+ if (control_pid < 0)
+ dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type));
+ else
+ dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
+ return -ESRCH;
+ }
+
+ if (who == KILL_CONTROL || who == KILL_ALL)
+ if (control_pid > 0)
+ if (kill(control_pid, signo) < 0)
+ r = -errno;
+
+ if (who == KILL_MAIN || who == KILL_ALL)
+ if (main_pid > 0)
+ if (kill(main_pid, signo) < 0)
+ r = -errno;
+
+ if (who == KILL_ALL) {
+ _cleanup_set_free_ Set *pid_set = NULL;
+ int q;
+
+ pid_set = set_new(trivial_hash_func, trivial_compare_func);
+ if (!pid_set)
+ return -ENOMEM;
+
+ /* Exclude the control/main pid from being killed via the cgroup */
+ if (control_pid > 0) {
+ q = set_put(pid_set, LONG_TO_PTR(control_pid));
+ if (q < 0)
+ return q;
+ }
+
+ if (main_pid > 0) {
+ q = set_put(pid_set, LONG_TO_PTR(main_pid));
+ if (q < 0)
+ return q;
+ }
+
+ q = cgroup_bonding_kill_list(u->cgroup_bondings, signo, false, false, pid_set, NULL);
+ if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT)
+ r = q;
+ }
+
+ return r;
+}
+