1 terminal multiple disks

os.pullEvent = os.pullEventRaw
while true do
		if disk.isPresent("top") then
				if fs.exists("disk/.security/key") then
						shell.run("disk/.security/key")
						if key == "lemmein" then
								disk.eject("top")
								rs.setOutput("left", true)
								sleep(3)
								rs.setOutput("left", false)
						else
								disk.eject("top")
						end
				else
						disk.eject("top")
				end
		end
		sleep(0.1)
end

local tKeys = {
	["basement"] = "right",
	["level2"] = "left",
	--# add additional entries here to pair more sides and phrases
}
while true do
	local event, side = os.pullEvent( "disk" )
	--#note: instead of checking 10 times a second,
	--#this only checks when a disk was inserted
	if disk.hasData( side ) and fs.exists( "/disk/.security/key", "r" ) then
		--#I check if the disk has data first, because technically
		--#it's possible to insert music disks which don't have a file system.
		local file = fs.open( "/disk/.security/key" )
		local key = file.readAll()
		file.close()
		--#running a program on a disk is a major security flaw of the progrm you posted
		--#that program could do anything, such as deleting all your files, or opening all the doors
		--#instead, here I read the file, the contents of which should simply be basement or level2
		if tKeys[ key ] then --#modify this to be "basement" or whatever you want
			--#eject the disk
			disk.eject( side )
			rs.setOutput(tKeys[key], true)
			sleep(3)
			rs.setOutput(tKeys[key], false)
		else --#add additional elseifs before the else to add different sides.
			disk.eject( side )
		end
	end
end

local tKeys = {
		["basement"] = "back",
		["level2"] = "left",
}
while true do
		local event, side = os.pullEvent("disk")
		if disk.hasData("top") and fs.exists( "/disk/.security/key", "r") then
				local file = fs.open( "/disk/.security/key" )
				local key = file.readAll()
				file.close()
				if tKeys["basement"] then
						disk.eject("top")
						rs.setOutput(tKeys[key], true)
						sleep(3)
						rs.setOutput(tKeys[key], false)
				elseif
		tKeys["level2"] then
						disk.eject("top")
						rs.setOutput(tKeys[key], true)
						sleep(3)
						rs.setOutput(tKeys[key], false)
	else
						disk.eject("top")
				end
		end
end

if disk.hasData("top") and fs.exists( "/disk/.security/key" ) then
  local file = fs.open( "/disk/.security/key", "r" )

KingofGamesYami, on 28 February 2018 - 10:09 PM said:

I'm terribly sorry I've been messing this up so much, thought this would be super easy to write. Had a bunch of classes to take but I'm back now :)/>/>

Spoiler

local tKeys = {
		["basement"] = "right",
		["level2"] = "left",
		--# add additional entries here to pair more sides and phrases
}
while true do
		local event, side = os.pullEvent( "disk" )
		--#note: instead of checking 10 times a second,
		--#this only checks when a disk was inserted
		if disk.hasData( side ) and fs.exists( "/disk/.security/key" ) then
				--#I check if the disk has data first, because technically
				--#it's possible to insert music disks which don't have a file system.
				local file = fs.open( "/disk/.security/key", "r" )
				local key = file.readAll()
				file.close()
				--#running a program on a disk is a major security flaw of the progrm you posted
				--#that program could do anything, such as deleting all your files, or opening all the doors
				--#instead, here I read the file, the contents of which should simply be basement or level2
				if tKeys[ key ] then
					--#if the key given is in tKeys ("basement" or "level2")
					--#eject the disk
					disk.eject( side )
					--# set output on the side paired in tKeys (for "basement", that is "right")
					rs.setOutput(tKeys[key], true)
					sleep(3)
					rs.setOutput(tKeys[key], false)
				else
					disk.eject( side )
				end
		end
end

Don't actually modify the part that was marked as "modify this" with a comment earlier – that was accedentially left in there from an earlier design. The only part you should need to change is the table at the top.