shell 日志

# 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=$1
if [ ! -f $JSON_FILE ]; then
    printf "${JSON_FILE} is not exits. Please check. \n" >> $OUTPUT_FILE
    cat $OUTPUT_FILE >> $ARCHIVE_LOG
    exit 2
elif ! jq . $JSON_FILE >/dev/null 2>&1; then
    printf "jq cannot parse ${JSON_FILE}, Please check. \n" >> $OUTPUT_FILE
    exit 2
fi
}
# Function: Log an event.
log() {
    echo "[$(date +"%Y-%m-%d"+"%T")]: $*"
}

转载于:https://my.oschina.net/firxiao/blog/3039786

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