function logez {
  typeset device path dir base logdir logname keep silent t status= checkerror=no

  for i; do
    shift
    if [[ $i = "--" ]]
    then break
    else eval "$i"
    fi
  done

  path=$1
  (( $# > 1 )) && shift

  : ${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
  [[ $silent = "yes" ]] || printf "%s\n" "Please check the logfile: $logname"
  find $logdir -type f -mtime +$keep -name "$base.log.*" -exec rm {} \; >/dev/null 2>&1
  
  if [[ $device = "both" ]]; then
    t=/tmp/$$.$RANDOM
    { $path --use-logez "$@" 2>&1; printf "%s\n" $? >$t; } | tee -a $logname

    status=$(< $t)

    while [[ -z "$status" ]]; do
      sleep 1
      status=$(< $t)
    done

    rm $t
  else
    $path --use-logez "$@" >> $logname 2>&1
    (( status = $? ))
  fi

  if [[ $checkerror = "yes" ]]; then
    if grep "^ERROR" $logname >/dev/null; then
      (( status = 1 ))
    fi
  fi

  return $status
}