1 files changed, 30 insertions, 0 deletions
diff --git a/src/conf-parser.c b/src/conf-parser.c
index 3ccd1c067a..ac8d9f5ac5 100644
--- a/src/conf-parser.c
+++ b/src/conf-parser.c
@@ -509,6 +509,36 @@ int config_parse_bool(
         return 0;
 }
 
+int config_parse_tristate(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        int k;
+        int *b = data;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        /* Tristates are like booleans, but can also take the 'default' value, i.e. "-1" */
+
+        k = parse_boolean(rvalue);
+        if (k < 0) {
+                log_error("[%s:%u] Failed to parse boolean value, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        *b = !!k;
+        return 0;
+}
+
 int config_parse_string(
                 const char *filename,
                 unsigned line,