typedef struct a_backup_db {
    unsigned short      version;
    const char *        output_dir;
    const char *        connectparms;
    MSG_CALLBACK        confirmrtn;
    MSG_CALLBACK        errorrtn;
    MSG_CALLBACK        msgrtn;
    MSG_CALLBACK        statusrtn;
    a_bit_field         backup_database : 1;
    a_bit_field         backup_logfile  : 1;
    a_bit_field         no_confirm      : 1;
    a_bit_field         quiet           : 1;
    a_bit_field         rename_log      : 1;
    a_bit_field         truncate_log    : 1;
    a_bit_field         rename_local_log: 1;
    a_bit_field         server_backup   : 1;
    const char *        hotlog_filename;
    char                backup_interrupted;
    a_chkpt_log_type    chkpt_log_type;
    a_sql_uint32        page_blocksize;
} a_backup_db;