#!/bin/bash
 
auth=/var/log/auth.log
 
if [ "$1" != "" ]; then  #check that there is an argument
 
        if [ "$1" = success ]; then     #check the entered argument for success
                for i in `grep Accepted ${auth} | cut -d: -f3 | cut -c18-23`  #search and cut the session id
                do
 
                id=$i
                user=`grep Accepted ${auth} | grep ${id} | cut -d: -f4 | cut -d' ' -f5`
                month=`grep Accepted ${auth} | grep ${id} | cut -d" " -f1`
                day=`grep Accepted ${auth} | grep ${id} | cut -c4-6 | cut -c1-3`
                atime=`grep Accepted ${auth} | grep ${id} | cut -c7-15`
 
                echo "Status: [success] Account name: $user  Date:$month,$day,$atime"
 
                done
 
        elif [ "$1" = fail ]; then      #check the entered argument for fail
 
                for i in `grep Failed ${auth} | grep password | cut -c8-15` #search and cut the time
                do
 
                id=$i
                user=`grep Failed ${auth} | grep ${id} | grep password | cut -d: -f4 | cut -d" " -f5`
                month=`grep Failed ${auth} | grep ${id} | grep password | cut -c1-3`
                day=`grep Failed ${auth} | grep ${id} | grep password | cut -c4-6`
                #atime=`grep Failed ${auth} | grep ${id} | cut -d" " -f3`
                atime=$i
 
                echo "Status: [fail] Account name: $user  Date: $month, $day, $atime"
 
                done
 
 
        else    #if more than one argument is entered or it doesn't match fail or success exit
        exit 0
        fi
 
 
else
        echo "Example: ./auth.sh [success | fail]"  #if there is no argument entered show example
        exit 0
fi