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
@@ -799,8 +799,10 @@
 			fclose(f);
 			return NULL;
 		}
-		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)) {
 				if (cfg_process(tmp, _tmpc, _last, buf, lineno, configfile, includelevel
 #ifdef PRESERVE_COMMENTS