diff -ru bird-1.3.6/sysdep/unix/main.c bird-1.3.6_fix//sysdep/unix/main.c
--- bird-1.3.6/sysdep/unix/main.c	2011-10-10 04:57:59.000000000 -0300
+++ bird-1.3.6_fix//sysdep/unix/main.c	2012-03-18 10:50:31.397381192 -0300
@@ -167,12 +167,15 @@
 {
   char full_name[BIRD_FNAME_MAX];
   char *cur = filename;
+  char *dir;
   int ret;
 
   if (*filename != '/') {
-    snprintf(full_name, sizeof(full_name), "%s/%s", dirname(config_name), filename);
+    dir = strdup(config_name);
+    snprintf(full_name, sizeof(full_name), "%s/%s", dirname(dir), filename);
     full_name[sizeof(full_name)-1] = 0;
     cur = full_name;
+    free(dir);
   }
 
   if ((ret = open(cur, O_RDONLY)) == -1)