afd_t
afd_t *afd = &curthread->t_activefd;
free_afd(afd_t *afd) /* called below and from thread_free() */
afd_t *afd = &curthread->t_activefd;
afd_t *afd = &curthread->t_activefd;
afd_t *afd = &t->t_activefd;
extern void free_afd(afd_t *afd);
afd_t t_activefd; /* active file descriptor table */