void tar_stat_destroy (struct tar_stat_info *st);
void usage (int) __attribute__ ((noreturn));
int tar_timespec_cmp (struct timespec a, struct timespec b);
+const char *archive_format_string (enum archive_format fmt);
+const char *subcommand_string (enum subcommand c);
/* Module update.c. */
bool sys_get_archive_stat (void);
int sys_exec_command (char *file_name, int typechar, struct tar_stat_info *st);
void sys_wait_command (void);
+int sys_exec_info_script (const char *archive_name, int volume_number);
/* Module compare.c */
void report_difference (struct tar_stat_info *st, const char *message, ...);