diff -u -r src.org/tools/periph/dexeconfig.c src/tools/periph/dexeconfig.c
--- src.org/tools/periph/dexeconfig.c	2010-06-10 06:48:00.000000000 +0400
+++ src/tools/periph/dexeconfig.c	2010-06-10 06:49:16.000000000 +0400
@@ -238,7 +238,7 @@
     exit(1);
   }
   close(fd);
-  fc = open(cfile, O_WRONLY | O_CREAT | O_TRUNC);
+  fc = open(cfile, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
   if (fc < 0) {
     perror("cannot open config file");
     exit(1);