condition: record test state internally and beef it up to be a full enum

src/core/condition.c

@@ -53,11 +53,9 @@ bool condition_test_list(const char *unit, Condition *first) {
                                        c->trigger ? "|" : "",
                                        c->negate ? "!" : "",
                                        c->parameter,
-                                       r > 0 ? "succeeded" : "failed",
+                                       condition_result_to_string(c->result),
                                        unit);
 
-                c->state = r > 0 ? CONDITION_STATE_SUCCEEDED : CONDITION_STATE_FAILED;
-
                 if (!c->trigger && r <= 0)
                         return false;
 

src/core/dbus-unit.c

@@ -328,10 +328,16 @@ static int property_get_conditions(
                 return r;
 
         LIST_FOREACH(conditions, c, u->conditions) {
+                int tristate;
+
+                tristate =
+                        c->result == CONDITION_UNTESTED ? 0 :
+                        c->result == CONDITION_SUCCEEDED ? 1 : -1;
+
                 r = sd_bus_message_append(reply, "(sbbsi)",
                                           condition_type_to_string(c->type),
                                           c->trigger, c->negate,
-                                          c->parameter, c->state);
+                                          c->parameter, tristate);
                 if (r < 0)
                         return r;
 

src/shared/condition-util.c

@@ -429,17 +429,22 @@ int condition_test(Condition *c) {
                 [CONDITION_FIRST_BOOT] = condition_test_first_boot,
                 [CONDITION_NULL] = condition_test_null,
         };
-        int r;
+
+        int r, b;
 
         assert(c);
         assert(c->type >= 0);
         assert(c->type < _CONDITION_TYPE_MAX);
 
         r = condition_tests[c->type](c);
-        if (r < 0)
+        if (r < 0) {
+                c->result = CONDITION_ERROR;
                 return r;
+        }
 
-        return (r > 0) == !c->negate;
+        b = (r > 0) == !c->negate;
+        c->result = b ? CONDITION_SUCCEEDED : CONDITION_FAILED;
+        return b;
 }
 
 void condition_dump(Condition *c, FILE *f, const char *prefix) {
@@ -456,7 +461,7 @@ void condition_dump(Condition *c, FILE *f, const char *prefix) {
                 c->trigger ? "|" : "",
                 c->negate ? "!" : "",
                 c->parameter,
-                CONDITION_STATE_IS_FAILED(c->state) ? "failed" : CONDITION_STATE_IS_SUCCEEDED(c->state) ? "succeeded" : "untested");
+                condition_result_to_string(c->result));
 }
 
 void condition_dump_list(Condition *first, FILE *f, const char *prefix) {
@@ -489,3 +494,12 @@ static const char* const condition_type_table[_CONDITION_TYPE_MAX] = {
 };
 
 DEFINE_STRING_TABLE_LOOKUP(condition_type, ConditionType);
+
+static const char* const condition_result_table[_CONDITION_RESULT_MAX] = {
+        [CONDITION_UNTESTED] = "untested",
+        [CONDITION_SUCCEEDED] = "succeeded",
+        [CONDITION_FAILED] = "failed",
+        [CONDITION_ERROR] = "error",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(condition_result, ConditionResult);

src/shared/condition-util.h

@@ -51,15 +51,14 @@ typedef enum ConditionType {
         _CONDITION_TYPE_INVALID = -1
 } ConditionType;
 
-#define CONDITION_STATE_IS_SUCCEEDED(state) ((state) > 0)
+typedef enum ConditionResult {
-#define CONDITION_STATE_IS_UNKNOWN(state) ((state) == 0)
+        CONDITION_UNTESTED,
-#define CONDITION_STATE_IS_FAILED(state) ((state) < 0)
+        CONDITION_SUCCEEDED,
-
+        CONDITION_FAILED,
-enum {
+        CONDITION_ERROR,
-        CONDITION_STATE_SUCCEEDED = -1,
+        _CONDITION_RESULT_MAX,
-        CONDITION_STATE_UNKNOWN = 0,
+        _CONDITION_RESULT_INVALID = -1
-        CONDITION_STATE_FAILED = 1
+} ConditionResult;
-};
 
 typedef struct Condition {
         ConditionType type;
@@ -68,7 +67,7 @@ typedef struct Condition {
         bool negate:1;
 
         char *parameter;
-        int state;
+        ConditionResult result;
 
         LIST_FIELDS(struct Condition, conditions);
 } Condition;
@@ -84,3 +83,6 @@ void condition_dump_list(Condition *c, FILE *f, const char *prefix);
 
 const char* condition_type_to_string(ConditionType t) _const_;
 int condition_type_from_string(const char *s) _pure_;
+
+const char* condition_result_to_string(ConditionResult r) _const_;
+ConditionResult condition_result_from_string(const char *s) _pure_;