#!/bin/sh

# A simple login bash script
#trap interrupts your keyboard if you press ctrl+z or ctrl+c
trap '' INT TSTP

read -p "Enter username: " usname
grep -q $usname mango.txt

if [ "$?" -gt 0 ]; then
    echo "Username not found"
    sleep 1
    pkill -9 bash
else
    read -s -p "Password: " password
    if [ "$password" == "" ]; then 
        echo "Password can not be blank"
        ./login.sh
    else
        #saves the password in md5sum format in tmp.txt
        echo $password | md5sum > tmp.txt
        #assigning a tmp variable which reads the tmp.txt
        tmp="$(cat tmp.txt)"
        #if the md5 hashes match, then allow login saying yo
        cat mango.txt | grep -q $usname::$tmp
        if [ "$?" == 0 ]; then
            echo -e "\nyo"
            #else print login failed
        else
            echo -e "\nLogin failed"
            sleep 1
            pkill -9 bash
        fi
    fi
fi
rm tmp.txt