safer rm command

rm.sh

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

rm () 
{ 
    local limit=50;
    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 [[ -n ` echo "$base" |grep "\." ` ]]; then
            new=`echo "$base" |sed -e "s/\([^.]*$\)/$RANDOM.\1/" `;
        else
            new="$base.$RANDOM";
        fi;
        trash_file="$trash/$new";
        local fs=`du -BM -s "$full" |awk -FM '{print $1}'`;
        if [ "$fs" -gt "$limit" ]; then
            read -p "File/Folder is ${fs}Mb, too large. rm it permanently? [Y/n]" answer;
            case "$answer" in 
                "Y" | "" | "y")
                    /bin/rm -rv "$full";
                    logger "'$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
}