+extern void slide_free(Slide *s);
+extern void slide_consume(Slide *s, int n);
+extern void slide_added(Slide *s, int n);
+extern Slide *slide_new(int n);
+extern void slide_expand(Slide *s, int n);
+/* symsocket.c */
+extern int wrap_recv(int fd, void *buf, int len);
+extern int wrap_send(int fd, void *buf, int len);
+extern void socket_free(Socket *s);
+extern void socket_free_parent(Socket *s);
+extern Socket *socket_listen(char *path);
+extern Socket *socket_accept(Socket *l);
+extern Socket *socket_connect(char *path);
+extern void socket_consume_msg(Socket *s);
+extern void socket_pre_select(Socket *s, fd_set *rfds, fd_set *wfds);
+extern int socket_post_select(Socket *s, fd_set *rfds, fd_set *wfds);
+extern int socket_write(Socket *s, void *buf, int len);
+/* serial.c */
+extern TTY *serial_open(char *path, int lock_mode);
+/* cmd.c */
+extern int cmd_parse(Cmd *c, Context *ctx, char *buf);
+extern void cmd_show_status(Cmd *c, Context *ctx);
+extern int cmd_key(Cmd *c, Context *ctx, int key);
+extern int cmd_activate(Cmd *c, Context *ctx);
+extern void cmd_new_status(Cmd *c, Context *ctx, char *msg);
+extern Cmd *cmd_new(void);
+/* lockfile.c */
+extern Filelist *filelist_new(void);
+extern void filelist_remove(Filelist *fl, Filelist_ent *fle);
+extern void filelist_add(Filelist *fl, char *fn);
+extern void filelist_free(Filelist *fl);
+extern void filelist_print(Filelist *fl, FILE *f);
+extern int lockfile_make(char *name);
+extern void lockfile_add_places(Filelist *fl, char *leaf);
+extern void lockfile_regularize_and_add(Filelist *fl, char *leaf);
+extern void lockfile_add_name_from_path(Filelist *fl, char *file);
+extern void lockfile_add_name_from_dev(Filelist *fl, dev_t dev);
+extern void lockfile_check_dir_for_dev(Filelist *fl, char *dir, dev_t dev);
+extern Filelist *lockfile_make_list(char *device);
+extern void lockfile_remove_stale(Filelist *fl);
+extern Filelist *lockfile_lock(Filelist *fl);
+extern void lockfile_unlock(Filelist *fl);
+extern int serial_lock_check(Serial_lock *l);
+extern void serial_lock_free(Serial_lock *l);
+extern Serial_lock *serial_lock_new(char *dev, int mode);
+/* utf8.c */
+extern void utf8_flush(Context *c);
+extern void utf8_parse(Context *c, uint32_t ch);
+extern UTF8 *utf8_new(void);
+extern int utf8_encode(char *ptr, int ch);
+extern void utf8_emit(TTY *t, int ch);
+/* vt102_charset.c */
+extern uint32_t vt102_charset_c0[VT102_CHARSET_SIZE];
+extern uint32_t vt102_charset_us[VT102_CHARSET_SIZE];
+extern uint32_t vt102_charset_uk[VT102_CHARSET_SIZE];
+extern uint32_t vt102_charset_vt52[VT102_CHARSET_SIZE];
+extern uint32_t vt102_charset_gl[VT102_CHARSET_SIZE];
+extern uint32_t *charset_from_csid[];