#!/bin/bash
 
## variable 
 
for executor
 
path="/home"
depth="2"
 
function helpu {
 
    ## print help info
 
    echo " "
    echo "[disk monitor]"
    echo "Usage: $0 --depth N directory_path"
    echo " "
    exit
}
 
function parser {
 
    ## parse the input parameters
 
    if [ $# -gt 3 ]; then
 
        echo -e "\nError: The number of parameters is wrong, please input the correct parameters number first
 
"
        helpu
 
        exit 1
    fi
 
    while [ True ]; do
        if [ "${1}" = "--help" -o "${1}" = "-h" ]; then
            helpu
        elif [ "${1}" = "--depth" -o "${1}" = "-d" ]; then
            depth="${2}"
            shift 2
        elif [ "${1}" != "" ]; then
            path=${1}
            break
        
 
elif [ "${1}" == "" ]; then
            break
        else
            echo "Unexpected error happened"
            exit 1
        fi
    done
}
 
function executor {
    ## real monitor executor
 
    DATE=$(date '+%m%d%y')
    du -d "${depth}" "${path}" | sort -rn | sed '{21,$D; =}' | sed 'N; s/\n/ /' | gawk '{printf $1 ":" "\t" $2 "\t" $3 "\n"}' | tee /tmp/disk_monitor_${DATE}.report
}
 
parser "${@}"
executor