+int close_all_fds(const int except[], unsigned n_except);
+
+bool fstype_is_network(const char *fstype);
+
+int chvt(int vt);
+
+int read_one_char(FILE *f, char *ret, bool *need_nl);
+int ask(char *ret, const char *replies, const char *text, ...);
+
+int reset_terminal(int fd);
+int open_terminal(const char *name, int mode);
+int acquire_terminal(const char *name, bool fail, bool force);
+int release_terminal(void);
+
+int flush_fd(int fd);
+
+int ignore_signal(int sig);
+
+int close_pipe(int p[]);
+
+ssize_t loop_read(int fd, void *buf, size_t nbytes);
+
+int path_is_mount_point(const char *path);
+
+extern char * __progname;
+