diff -urNad asterisk-1.0.9.dfsg.1/config.c /tmp/dpep.oKwZhH/asterisk-1.0.9.dfsg.1/config.c
--- asterisk-1.0.9.dfsg.1/config.c	2005-07-04 21:58:39.000000000 +0300
+++ /tmp/dpep.oKwZhH/asterisk-1.0.9.dfsg.1/config.c	2005-07-04 22:02:01.000000000 +0300
@@ -568,8 +568,10 @@
 			ast_log(LOG_DEBUG, "Parsing %s\n", fn);
 		else if (option_verbose > 1)
 			ast_verbose("Found\n");
-		while(!feof(f)) {
+		while(!feof(f) && ((ferror(f)) != 0) ) {
+			/* in the above, when read(2) sets errno to EISDIR, ferror returns 1 */
 			lineno++;
+			clearer(f); /* to notice fgets errors. really necessary? */
 			if (fgets(buf, sizeof(buf), f)) {
 				new_buf = buf;
 				if (comment)