--- libaitcfg/src/parse.c	2012/07/30 11:23:09	1.8.4.3
+++ libaitcfg/src/parse.c	2012/07/30 11:44:35	1.8.4.4
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: parse.c,v 1.8.4.3 2012/07/30 11:23:09 misho Exp $
+* $Id: parse.c,v 1.8.4.4 2012/07/30 11:44:35 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -359,7 +359,7 @@ int
 cfgReadLines(FILE *f, const char *delim, const char *end, cfg_root_t * __restrict cfg)
 {
 	char line[BUFSIZ];
-	struct tagCfg *av = NULL;
+	struct tagCfg *d, *av = NULL;
 	char *psAttr, *psVal = NULL;
 
 	while (!feof(f)) {
@@ -391,12 +391,8 @@ cfgReadLines(FILE *f, const char *delim, const char *e
 		if (!av) {
 			LOGERR;
 			return -1;
-		} else {
+		} else
 			memset(av, 0, sizeof(struct tagCfg));
-			CFG_RC_LOCK(cfg);
-			SLIST_INSERT_HEAD(cfg, av, cfg_next);
-			CFG_RC_UNLOCK(cfg);
-		}
 
 		if (psVal)
 			AIT_SET_STR(&av->cfg_val, psVal);
@@ -405,6 +401,18 @@ cfgReadLines(FILE *f, const char *delim, const char *e
 				io_align(AIT_LEN(&av->cfg_attr) - 1, 1) / 2);
 
 		CFG_RC_LOCK(cfg);
+		/* find & delete duplicates */
+		if ((d = RB_FIND(tagRC, cfg, av))) {
+			RB_REMOVE(tagRC, cfg, d);
+			SLIST_REMOVE(cfg, d, tagCfg, cfg_next);
+
+			AIT_FREE_VAL(&d->cfg_val);
+			AIT_FREE_VAL(&d->cfg_attr);
+			AIT_FREE_VAL(&d->cfg_sec);
+			io_free(d);
+		}
+
+		SLIST_INSERT_HEAD(cfg, av, cfg_next);
 		RB_INSERT(tagRC, cfg, av);
 		CFG_RC_UNLOCK(cfg);
 	}