#!/usr/sbin/dtrace -s

syscall::open*:entry
/execname == $$1/
{
        self->filename = arg0;
}

syscall::open*:return
/errno != 0 && self->filename != NULL && execname == $$1/
{
        printf("%s returned %d", copyinstr(self->filename), errno);
        self->filename = NULL;
}