timer: convert failure bool into enum

4 files changed, 46 insertions, 12 deletions

diff --git a/src/automount.c b/src/automount.c
index 507fc258d6..cf2fb60cdf 100644
--- a/src/automount.c
+++ b/src/automount.c
@@ -881,7 +881,7 @@ const UnitVTable automount_vtable = {
 
         .bus_interface = "org.freedesktop.systemd1.Automount",
         .bus_message_handler = bus_automount_message_handler,
-        .bus_invalidating_properties =  bus_automount_invalidating_properties,
+        .bus_invalidating_properties = bus_automount_invalidating_properties,
 
         .shutdown = automount_shutdown
 };
diff --git a/src/dbus-timer.c b/src/dbus-timer.c
index 0988b3e118..b396aed047 100644
--- a/src/dbus-timer.c
+++ b/src/dbus-timer.c
@@ -31,6 +31,7 @@
         "  <property name=\"Unit\" type=\"s\" access=\"read\"/>\n"      \
         "  <property name=\"Timers\" type=\"a(stt)\" access=\"read\"/>\n" \
         "  <property name=\"NextElapseUSec\" type=\"t\" access=\"read\"/>\n" \
+        "  <property name=\"Result\" type=\"s\" access=\"read\"/>\n"    \
         " </interface>\n"
 
 #define INTROSPECTION                                                   \
@@ -51,7 +52,8 @@ const char bus_timer_interface[] _introspect_("Timer") = BUS_TIMER_INTERFACE;
 
 const char bus_timer_invalidating_properties[] =
         "Timers\0"
-        "NextElapseUSec\0";
+        "NextElapseUSec\0"
+        "Result\0";
 
 static int bus_timer_append_timers(DBusMessageIter *i, const char *property, void *data) {
         Timer *p = data;
@@ -113,10 +115,13 @@ static int bus_timer_append_unit(DBusMessageIter *i, const char *property, void
         return dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t) ? 0 : -ENOMEM;
 }
 
+static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_timer_append_timer_result, timer_result, TimerResult);
+
 static const BusProperty bus_timer_properties[] = {
         { "Unit",           bus_timer_append_unit,        "s", 0 },
         { "Timers",         bus_timer_append_timers, "a(stt)", 0 },
         { "NextElapseUSec", bus_property_append_usec,     "t", offsetof(Timer, next_elapse) },
+        { "Result",         bus_timer_append_timer_result,"s", offsetof(Timer, result)      },
         { NULL, }
 };
 
diff --git a/src/timer.c b/src/timer.c
index ce7fd6bb3a..e318fee201 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -133,8 +133,10 @@ static void timer_dump(Unit *u, FILE *f, const char *prefix) {
 
         fprintf(f,
                 "%sTimer State: %s\n"
+                "%sResult: %s\n"
                 "%sUnit: %s\n",
                 prefix, timer_state_to_string(t->state),
+                prefix, timer_result_to_string(t->result),
                 prefix, UNIT_DEREF(t->unit)->id);
 
         LIST_FOREACH(value, v, t->values)
@@ -183,13 +185,13 @@ static int timer_coldplug(Unit *u) {
         return 0;
 }
 
-static void timer_enter_dead(Timer *t, bool success) {
+static void timer_enter_dead(Timer *t, TimerResult f) {
         assert(t);
 
-        if (!success)
-                t->failure = true;
+        if (f != TIMER_SUCCESS)
+                t->result = f;
 
-        timer_set_state(t, t->failure ? TIMER_FAILED : TIMER_DEAD);
+        timer_set_state(t, t->result != TIMER_SUCCESS ? TIMER_FAILED : TIMER_DEAD);
 }
 
 static void timer_enter_waiting(Timer *t, bool initial) {
@@ -273,7 +275,7 @@ static void timer_enter_waiting(Timer *t, bool initial) {
 
 fail:
         log_warning("%s failed to enter waiting state: %s", UNIT(t)->id, strerror(-r));
-        timer_enter_dead(t, false);
+        timer_enter_dead(t, TIMER_FAILURE_RESOURCES);
 }
 
 static void timer_enter_running(Timer *t) {
@@ -295,7 +297,7 @@ static void timer_enter_running(Timer *t) {
 
 fail:
         log_warning("%s failed to queue unit startup job: %s", UNIT(t)->id, bus_error(&error, r));
-        timer_enter_dead(t, false);
+        timer_enter_dead(t, TIMER_FAILURE_RESOURCES);
 
         dbus_error_free(&error);
 }
@@ -309,7 +311,7 @@ static int timer_start(Unit *u) {
         if (UNIT_DEREF(t->unit)->load_state != UNIT_LOADED)
                 return -ENOENT;
 
-        t->failure = false;
+        t->result = TIMER_SUCCESS;
         timer_enter_waiting(t, true);
         return 0;
 }
@@ -320,7 +322,7 @@ static int timer_stop(Unit *u) {
         assert(t);
         assert(t->state == TIMER_WAITING || t->state == TIMER_RUNNING || t->state == TIMER_ELAPSED);
 
-        timer_enter_dead(t, true);
+        timer_enter_dead(t, TIMER_SUCCESS);
         return 0;
 }
 
@@ -332,6 +334,7 @@ static int timer_serialize(Unit *u, FILE *f, FDSet *fds) {
         assert(fds);
 
         unit_serialize_item(u, f, "state", timer_state_to_string(t->state));
+        unit_serialize_item(u, f, "result", timer_result_to_string(t->result));
 
         return 0;
 }
@@ -351,6 +354,15 @@ static int timer_deserialize_item(Unit *u, const char *key, const char *value, F
                         log_debug("Failed to parse state value %s", value);
                 else
                         t->deserialized_state = state;
+        } else if (streq(key, "result")) {
+                TimerResult f;
+
+                f = timer_result_from_string(value);
+                if (f < 0)
+                        log_debug("Failed to parse result value %s", value);
+                else if (f != TIMER_SUCCESS)
+                        t->result = f;
+
         } else
                 log_debug("Unknown serialization key '%s'", key);
 
@@ -443,7 +455,7 @@ static void timer_reset_failed(Unit *u) {
         if (t->state == TIMER_FAILED)
                 timer_set_state(t, TIMER_DEAD);
 
-        t->failure = false;
+        t->result = TIMER_SUCCESS;
 }
 
 static const char* const timer_state_table[_TIMER_STATE_MAX] = {
@@ -466,6 +478,13 @@ static const char* const timer_base_table[_TIMER_BASE_MAX] = {
 
 DEFINE_STRING_TABLE_LOOKUP(timer_base, TimerBase);
 
+static const char* const timer_result_table[_TIMER_RESULT_MAX] = {
+        [TIMER_SUCCESS] = "success",
+        [TIMER_FAILURE_RESOURCES] = "resources"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(timer_result, TimerResult);
+
 const UnitVTable timer_vtable = {
         .suffix = ".timer",
         .object_size = sizeof(Timer),
diff --git a/src/timer.h b/src/timer.h
index d5cbc11561..f5c5c64f25 100644
--- a/src/timer.h
+++ b/src/timer.h
@@ -56,6 +56,13 @@ typedef struct TimerValue {
         bool disabled;
 } TimerValue;
 
+typedef enum TimerResult {
+        TIMER_SUCCESS,
+        TIMER_FAILURE_RESOURCES,
+        _TIMER_RESULT_MAX,
+        _TIMER_RESULT_INVALID = -1
+} TimerResult;
+
 struct Timer {
         Unit meta;
 
@@ -67,7 +74,7 @@ struct Timer {
 
         Watch timer_watch;
 
-        bool failure;
+        TimerResult result;
 };
 
 void timer_unit_notify(Unit *u, UnitActiveState new_state);
@@ -80,4 +87,7 @@ TimerState timer_state_from_string(const char *s);
 const char *timer_base_to_string(TimerBase i);
 TimerBase timer_base_from_string(const char *s);
 
+const char* timer_result_to_string(TimerResult i);
+TimerResult timer_result_from_string(const char *s);
+
 #endif