case 'b': strcat(out_mode, "b"); break;
case 't': fn_list = strdup(optarg); is_bamin = 0; break;
case 'h': is_header = 1; break;
case 'H': is_header_only = 1; break;
case 'o': fn_out = strdup(optarg); break;
case 'f': g_flag_on = strtol(optarg, 0, 0); break;
case 'b': strcat(out_mode, "b"); break;
case 't': fn_list = strdup(optarg); is_bamin = 0; break;
case 'h': is_header = 1; break;
case 'H': is_header_only = 1; break;
case 'o': fn_out = strdup(optarg); break;
case 'f': g_flag_on = strtol(optarg, 0, 0); break;