logrm

#!/bin/bash
#write by shuaili

def_days=20
while getopts ":c:d:s:h" optname
  do
    case "$optname" in
      "c")
        count=$OPTARG
        #echo "Option $optname has value $OPTARG"
        ;;
      "d")
        days=$OPTARG
        #echo "Option $optname has value $OPTARG"
        ;;
      "s")
        size=$OPTARG
        #echo "Option $optname has value $OPTARG"
        ;;
      "h")
        echo "help:logrm -c count -d days -s disk_size dir"
        ;;
      "?")
        echo "Unknown option $OPTARG"
        ;;
      ":")
        echo "No argument value for option $OPTARG"
        ;;
      *)
        echo "Unknown error while processing options"
        ;;
    esac
  done

shift $(($OPTIND - 1))

dir=$1
mount_root_dir=$dir

df -h |grep -q "${mount_root_dir}$"
until [ $? -eq 0 ]
do
    mount_root_dir=`dirname $mount_root_dir`
    df -h |grep -q "${mount_root_dir}$"
done

if [ $dir ] 
then
    :
else
    echo "help:logrm -c count -d days -s disk_size dir"
    exit
fi

if [ $count ] 
then
    #echo "cd $dir;let tmp=`ls |wc -l`-$count;ls -t |tail -n $tmp|xargs rm -f" 
    cd $dir;let tmp=`ls |wc -l`-$count;ls -t |tail -n $tmp|xargs rm -f
fi

if [ $days ] 
then
    #echo "find $dir -mtime +$days |xargs rm -rf"
    find $dir -type f -mtime +$days |xargs rm -rf
    def_days=$days
fi

if [ $size ] 
then
    current_size=`df -h |grep "${mount_root_dir}$" |awk '{print $5}' |sed -e "s/%//"`
    while [[ $current_size -gt $size ]] && [[ $def_days -gt 2 ]]
    do
        #echo "find $dir -mtime +$def_days |xargs rm -rf"
        find $dir -type f -mtime +$def_days |xargs rm -rf
        let def_days=$def_days-1
        current_size=`df -h |grep "${mount_root_dir}$" |awk '{print $5}' |sed -e "s/%//"`
        #echo $def_days $current_size
    done
fi