assignment #2-q4

nums.sh

#!/bin/sh
# Author: Chris Niesel
# Class: Computer Science 2211A
# check if there are 2 arguments
if [ "$#" -eq "2" ]
 then
	# check if file doesn't exist
	if [ ! -f "$2" ]; then
		echo "input-file not found"
		exit 2
	# check what number argument #1 is
	# if argument #1 is equal to 1 show highest and second highest number
	elif [ "$1" -eq 1 ]
	then
		echo highest=`cat "$2" | sort -n | tail -2 | awk 'NR == 2'`
		echo secondHighest=`cat "$2" | sort -n | tail -2 | awk 'NR == 1'`
	exit 0
	# if argument #1 is equal to 0 show lowest and second lowest number
	elif [ "$1" -eq 0 ]
	then
		echo smallest=`cat "$2" | sort -n | head -2 | awk 'NR == 1'`
		echo secondSmallest=`cat "$2" | sort -n | head -2 | awk 'NR == 2'`
	exit 0
	# if argument #1 is not between 0 or 1 output error
	else
		echo "Option must be 0 or 1"
		exit 3
	fi
else
	# if input is less or more than 2 arguments output error and exit
	echo "Usage: nums option input-file"
	exit 1
fi