function logeasy {
  typeset path dir base device logdir logname keep pid abba silent
  eval path= keep=30 device=file silent=no "$@"

  [[ $device = stdout ]] && return 0
  [[ $device = null   ]] && { exec >/dev/null 2>&1; return 0; }

  base=${path##*/}
  base=${base%.@(ksh|sh|s|ss)}

  [[ -z "$logdir" ]] && {
    if [[ $path = */* ]]
    then dir=${path%/*}
    else dir="."
    fi

    logdir=$dir/log
  }

  logdir=$logdir/$base
  [[ -d $logdir ]] || mkdir -p $logdir
  logdir=$(cd $logdir >/dev/null 2>&1 && pwd -P)

  while [[ -z $logname || -f $logname ]]
  do
    [[ -z $logname ]] || sleep 1
    logname=$logdir/$base.log.$(date +%Y-%m-%dT%H:%M:%S)
  done

  touch $logname
  
  [[ $device = "both" ]] && {
    tail -f $logname & pid=$!

    abba=$(function t { trap 'printf "%s" a' EXIT; }; t; printf "%s" b)

    t=/tmp/$$.$RANDOM
    trap -p > $t

    if [[ -s $t ]]
    then has_trap="Y"
    else has_trap="N"
    fi

    rm $t

    if [[ ${has_trap} = "Y" ]]
    then
      t=/tmp/$$.$RANDOM
      trapadd "exec >&-; exec 2>&-; sleep 3; kill $pid" EXIT append trapout > $t
      new_trap=$(< $t)
      rm $t
      if [[ $abba = "ab" ]]
      then trap "eval \"${new_trap}\"" EXIT
      else       eval  "${new_trap}"
      fi
    else 
      if [[ $abba = "ab" ]]
      then trap "trapadd \"exec >&-; exec 2>&-; sleep 3; kill $pid\" EXIT" EXIT
      else       trap     "exec >&-; exec 2>&-; sleep 3; kill $pid"  EXIT
      fi
    fi
  }

  [[ $silent = "yes" ]] || printf "%s\n" "Please check the logfile: $logname"
  exec >>$logname 2>&1
  
  find $logdir -type f -mtime +$keep -exec rm {} \;
}