viewinfo

#!/bin/bash
function howto {
  echo "-----------------------------"
  echo "+  USAGE: viewinfo [-i cpu|mem] [-n NUM]"
  echo "+  INFOS: show top NUM processes with the most CPU or memory usage in descent order"
  echo "+  PARAM:"
  echo "    -i, cpu|mem, the item info to view, only support cpu or memory,default cpu"
  echo "    -n, NUM, the number of processes to view, default 10"
  echo "    -m, minimum,        the minimum user-id,default 1000"
  echo "    -M, maximum,        the maximum user-id,default 60000"
  echo "    -h, show this help information"
  exit
}

m=1000
M=60000
I=4
N=10


while getopts "i:n:m:M:h" option
do
case "${option}" in
i)
  case "${OPTARG}" in
  "cpu"|"CPU"|"Cpu")
    I=4
    ;;
  "mem"|"MEM"|"memory")
    I=5
    ;;
  *)
    howto
    ;;
  esac
  ;;
n)
  if [[ ${OPTARG} =~ ^[1-9][0-9]*$ ]]; then
    N=${OPTARG}
  else
    howto
  fi
  ;;
m)
  if [[ ${OPTARG} =~ ^[1-9][0-9]*$ ]]; then
    m=${OPTARG}
  else
    howto
  fi
  ;;
M)
  if [[ ${OPTARG} =~ ^[1-9][0-9]*$ ]]; then
    M=${OPTARG}
  else
    howto
  fi
  ;;
h)
  howto
  ;;
*)
  howto
  ;;
esac
done

usrs=$(getent passwd | awk -F':' -v "min=$m" -v "max=$M" '{ if ( ($3 >= min && $3 <= max  && $7 != "/sbin/nologin")) print $1 }' | sort -u | xargs | sed 's/ /,/g')

# echo $usrs
# echo $m
# echo $M
# echo $I
# echo $N
ps -U mail -u mail -o ni,user,pid,pcpu,pmem,cputime,etime,comm | grep PID
ps -U $usrs -u $usrs -o ni,user,pid,pcpu,pmem,cputime,etime,comm | grep -v PID | sort -rn -k +${I} | head -${N}