From 210dca6fd02254b8c4d145064cdfadbfef68dbd3 Mon Sep 17 00:00:00 2001
From: Olivier Brunel <jjk@jjacky.com>
Date: Thu, 14 Nov 2013 15:52:54 +0100
Subject: [PATCH] Fix RemainAfterExit services keeping a hold on console

When a service exits succesfully and has RemainAfterExit set, its hold
on the console (in m->n_on_console) wasn't released since the unit state
didn't change.
---
 src/core/service.c | 16 ++++++++++++++++
 src/core/unit.c    |  3 +++
 2 files changed, 19 insertions(+)

diff --git a/src/core/service.c b/src/core/service.c
index 5662180..62ae8f0 100644
--- a/src/core/service.c
+++ b/src/core/service.c
@@ -1570,6 +1570,22 @@ static void service_set_state(Service *s, ServiceState state) {
         if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
                 unit_destroy_cgroup(UNIT(s));
 
+        /* For remain_after_exit services, let's see if we can "release" the
+         * hold on the console, since unit_notify() only does that in case of
+         * change of state */
+        if (state == SERVICE_EXITED && s->remain_after_exit &&
+            UNIT(s)->manager->n_on_console > 0) {
+                ExecContext *ec = unit_get_exec_context(UNIT(s));
+                if (ec && exec_context_may_touch_console(ec)) {
+                        Manager *m = UNIT(s)->manager;
+
+                        m->n_on_console --;
+                        if (m->n_on_console == 0)
+                                /* unset no_console_output flag, since the console is free */
+                                m->no_console_output = false;
+                }
+        }
+
         if (old_state != state)
                 log_debug_unit(UNIT(s)->id,
                                "%s changed %s -> %s", UNIT(s)->id,
diff --git a/src/core/unit.c b/src/core/unit.c
index acd9c74..6c2c4a0 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -1449,6 +1449,9 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su
         if (UNIT_IS_INACTIVE_OR_FAILED(ns))
                 unit_destroy_cgroup(u);
 
+        /* Note that this doesn't apply to RemainAfterExit services exiting
+         * sucessfully, since there's no change of state in that case. Which is
+         * why it is handled in service_set_state() */
         if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) {
                 ExecContext *ec = unit_get_exec_context(u);
                 if (ec && exec_context_may_touch_console(ec)) {