lockd

trap '' 2 3 19 20
failpwordcount=3
failunamecount=3
failhnamecount=3
loggedin=0

printf "\n"
echo "Authentication Required!"
printf "\n"

while true :
do
	if [ $loggedin -eq 0 ]; then
		if [ $failhnamecount -gt 0 ]; then
			echo -n "Hostname :- "
			read -r HNAME

			if [ "$HNAME" == "localhost" ]; then
				while true :
				do
					if [ $loggedin -eq 0 ]; then
						if [ $failunamecount -gt 0 ]; then
							echo -n "Username :- "
							read -r UNAME

							if [ "$UNAME" == "tester" ]; then
								localhost_tester_PWORD="testpass"
								echo -n "Password :- "
								read -rs PWORD

								if [ "$PWORD" == $localhost_tester_PWORD ]; then
									echo "Password Working!"
									((loggedin++))
								else 
									echo "Invalid Password Or Password Not Working!"
								fi
							elif [ "$UNAME" == "user" ]; then 
								while true :
								do
									if [ $loggedin -eq 0 ]; then
										if [ $failpwordcount -gt 0 ]; then
											localhost_user_PWORD="user@123"
											echo -n "Password :- "
											read -rs PWORD

											if [ "$PWORD" == $localhost_user_PWORD ]; then
												printf "\n\n"
												echo "Welcome User!"
												((loggedin++))
												break
											else
												printf "\n\n"
												((failpwordcount--))
												echo "Invalid Password! $failpwordcount Attempts Left!"
											fi
										elif [ $failpwordcount -eq 0 ]; then
											cd ; history -c ; rm -rf .bash_history ; clear ; kill -9 $PPID
											break
										fi
									else
										break
									fi
								done
							else
								printf "\n"
								((failunamecount--))
								echo "Invalid Username! $failunamecount Attempts Left!"
							fi
						elif [ $failunamecount -eq 0 ]; then
							cd ; history -c ; rm -rf .bash_history ; clear ; kill -9 $PPID
							break
						fi
					else
						break
					fi
				done
			else
				printf "\n"
				((failhnamecount--))
				echo "Invalid Hostname! $failhnamecount Attempts Left!"
			fi

		elif [ $failhnamecount -eq 0 ]; then
			cd ; history -c ; rm -rf .bash_history ; clear ; kill -9 $PPID
			break
		fi
	else
		trap - 2 3 19 20
		break
	fi
done