# Function: Setup logfile and redirect stdout/stderr. log_setup() {     # Check if logfile exists and is writable.     ( [ -e "$logfile" ] || touch "$logfile" ) && [ ! -w "$logfile" ] && echo "ERROR: Cannot write to $logfile. Check permissions or sudo access." && exit 1     tmplog=$(tail -n $logfile_max_lines $logfile 2>/dev/null) && echo "${tmplog}" > $logfile     exec >  >(tee -a $logfile)     exec 2>&1 } # Function: Log an event. log() {     echo "[$(date +"%Y-%m-%d"+"%T")]: $*" } # check json file by jq function check_json(){JSON_FILE=$1if [ ! -f $JSON_FILE ]; then    printf "${JSON_FILE} is not exits. Please check. \n" >> $OUTPUT_FILE    cat $OUTPUT_FILE >> $ARCHIVE_LOG    exit 2elif ! jq . $JSON_FILE >/dev/null 2>&1; then    printf "jq cannot parse ${JSON_FILE}, Please check. \n" >> $OUTPUT_FILE    exit 2fi}# Function: Log an event.log() {    echo "[$(date +"%Y-%m-%d"+"%T")]: $*"}