#define LINENUM_LENGTH_BOUND (sizeof (LINENUM) * CHAR_BIT / 3 + 1)
XTERN enum backup_type backup_type;
int ok_to_reverse (char const *, ...) __attribute__ ((format (printf, 1, 2)));
void ask (char const *, ...) __attribute__ ((format (printf, 1, 2)));
void say (char const *, ...) __attribute__ ((format (printf, 1, 2)));
void fatal (char const *, ...)
__attribute__ ((noreturn, format (printf, 1, 2)));
void pfatal (char const *, ...)
__attribute__ ((noreturn, format (printf, 1, 2)));
char *fetchname (char *, int, time_t *);
char *savebuf (char const *, size_t);
char *savestr (char const *);
char const *version_controller (char const *, int, struct stat const *, char **, char **);
int version_get (char const *, char const *, int, int, char const *, struct stat *);
int create_file (char const *, int, mode_t);
int systemic (char const *);
char *format_linenum (char[LINENUM_LENGTH_BOUND + 1], LINENUM);
void Fseek (FILE *, file_offset, int);
void copy_file (char const *, char const *, int, mode_t);
void exit_with_signal (int) __attribute__ ((noreturn));
void ignore_signals (void);
void init_time (void);
void memory_fatal (void) __attribute__ ((noreturn));
void move_file (char const *, int volatile *, char *, mode_t, int);
void read_fatal (void) __attribute__ ((noreturn));
void remove_prefix (char *, size_t);
void removedirs (char *);
void set_signals (int);
void write_fatal (void) __attribute__ ((noreturn));