safe rm command

rm.sh

logger () 
{ 
    time=`TZ="Asia/Shanghai"  date +"%Y-%m-%d %T"`;
    echo "[$time] $*"
}

filesize () 
{ 
    /bin/ls -alF "$1" | awk '{print $5}'
}

function rm(){
    local limit=52428800 #50M.
    if [ -d $HOME/.local/share/Trash/files ];then
        trash="$HOME/.local/share/Trash/files"
    else
        trash="$HOME/.Trash"
    fi

    local log="/var/log/trash.log"

    while [[ ! -z "$1" ]]
    do
        if [[ ! -d "$1" ]]; then
            if [[ ! -f "$1" ]] ; then
                shift
                continue
            fi
        fi
        full=`readlink -f "$1"`
        base=`basename "$full"`

        if [[ ` echo "$base" |grep "\." ` ]]; then
            new=`echo "$base" |sed -e "s/\([^.]*$\)/$RANDOM.\1/" `
        else
            new="$base.$RANDOM"
        fi
        trash_file="$trash/$new"
        local fs=`filesize "$full"`

        if [ "$fs" -gt "$limit" ]; then                                                                                                                                                                           
            read -p "File is ${fs}c, too large. rm it permanently? [Y/n]" answer                                                                                                                                  
            case "$answer" in                                                                                                                                                                                     
                "Y" | "" | "y" )                                                                                                                                                                                  
                     /bin/rm -v "$full"                                                                                                                                                                           
                     logger "'$full' removed permanently";;                                                                                                                                                       
                *)                                                                                                                                                                                                
                     logger "aborted from deleting $full";;                                                                                                                                                       
            esac                                                                                                                                                                                                  
            shift                                                                                                                                                                                                 
            continue                                                                                                                                                                                              
        fi
        
        mv "$full" "$trash_file"
        if [ $? -eq 0 ];then
            if [ -w "$log" ]; then
                logger "$full => [$trash_file]" |tee -a "$log"
            else
                logger "$full => [$trash_file]"
            fi
        else
            logger "Error deleting $full"
        fi
        shift
    done
}