+void session_destroy_all(void (*)(Session *));
+void session_pty_cleanup2(Session *);
+
+Session *session_new(void);
+Session *session_by_tty(char *);
+void session_close(Session *);
+void do_setusercontext(struct passwd *);
+void child_set_env(char ***envp, u_int *envsizep, const char *name,
+ const char *value);