Bash script to display sorted list of processes using most memory or cpu with colorized output

proc.sh

#!/bin/bash

# Michelle L. Gill
# 2014/10/25
# For use with Today Scripts
# http://www.reddit.com/r/osx/comments/2k24ps/today_scripts_widget_update_colorized_output
# Inspired by: https://gist.github.com/anonymous/470bb40b05173fdb6348

# Set this to "cpu" or "mem"
procname="cpu"
# Number of processes to show
numproc=5

ps -amcwwwxo "pid %$procname command" | while read -r line; ((n++<$((numproc+1)))); do

    # Read commands from single line to handle spaces in command name
    line=`echo $line | sed -E 's/^ +//g;s/ +/ /g'`
    pid=`echo $line | cut -d' ' -f1`
    proc=`echo $line | cut -d' ' -f2`
    cmd=`echo $line | cut -d' ' -f3-10`

    # Setup formatting
    fmt=""

    # Color formatting for process rows
    if (($pid!="PID")); then

        # Format numbers
        numfmt="%6s %4.1f %s"

        # Truncate integer on % memory or cpu to determine color
        procint="${proc%%.*}"
        if (($procint >= 20)); then
            fmt=$'\e[1;31m'
        elif (($procint >= 10)); then
            fmt=$'\e[33m'
        else
            fmt=$'\e[m'
        fi

    else
        # Format the header with no color, boldface
        fmt=$'\e[1m'
        numfmt="%6s %4s %s"
    fi

    # Print the string
    printf "$fmt$numfmt\n" $pid $proc "$cmd" 
done