View difference between Paste ID: QKSH9E3S and GweLdEAQ

 
 -- Install lua parts of the os api
 function os.version()
 	if turtle then
 		return "TurtleOS 1.3"
 	end
 	return "CraftOS 1.3"
 end
 
 function os.pullEventRaw( _sFilter )
 	return coroutine.yield( _sFilter )
 end
 
 function os.pullEvent( _sFilter )
 	local event, p1, p2, p3, p4, p5 = os.pullEventRaw( _sFilter )
 	if event == "terminate" then
 		print( "Terminated" )
 		error()
 	end
 	return event, p1, p2, p3, p4, p5
 end
 
 -- Install globals
 function sleep( _nTime )
     local timer = os.startTimer( _nTime )
 	repeat
 		local sEvent, param = os.pullEvent( "timer" )
 	until param == timer
 end
 
 function write( sText )
 	local w,h = term.getSize()
 	local x,y = term.getCursorPos()
 
 	local nLinesPrinted = 0
 	local function newLine()
 		if y + 1 <= h then
 			term.setCursorPos(1, y + 1)
 		else
 			term.scroll(1)
 			term.setCursorPos(1, h)
 		end
 		x, y = term.getCursorPos()
 		nLinesPrinted = nLinesPrinted + 1
 	end
 
 	-- Print the line with proper word wrapping
 	while string.len(sText) > 0 do
 		local whitespace = string.match( sText, "^[ \t]+" )
 		if whitespace then
 			-- Print whitespace
 			term.write( whitespace )
 			x,y = term.getCursorPos()
 			sText = string.sub( sText, string.len(whitespace) + 1 )
 		end
 
 		local newline = string.match( sText, "^\n" )
 		if newline then
 			-- Print newlines
 			newLine()
 			sText = string.sub( sText, 2 )
 		end
 
 		local text = string.match( sText, "^[^ \t\n]+" )
 		if text then
 			sText = string.sub( sText, string.len(text) + 1 )
 			if string.len(text) > w then
 				-- Print a multiline word
 				while string.len( text ) > 0 do
 				if x > w then
 					newLine()
 				end
 					term.write( text )
 					text = string.sub( text, (w-x) + 2 )
 					x,y = term.getCursorPos()
 				end
 			else
 				-- Print a word normally
 				if x + string.len(text) > w then
 					newLine()
 				end
 				term.write( text )
 				x,y = term.getCursorPos()
 			end
 		end
 	end
 
 	return nLinesPrinted
 end
 
 function print( ... )
 	local nLinesPrinted = 0
 	for n,v in ipairs( { ... } ) do
 		nLinesPrinted = nLinesPrinted + write( tostring( v ) )
 	end
 	nLinesPrinted = nLinesPrinted + write( "\n" )
 	return nLinesPrinted
 end
 
 function read( _sReplaceChar, _tHistory )
 	term.setCursorBlink( true )
 
     local sLine = ""
 	local nHistoryPos = nil
 	local nPos = 0
     if _sReplaceChar then
 		_sReplaceChar = string.sub( _sReplaceChar, 1, 1 )
 	end
 
 	local w, h = term.getSize()
 	local sx, sy = term.getCursorPos()
 	local function redraw()
 		local nScroll = 0
 		if sx + nPos >= w then
 			nScroll = (sx + nPos) - w
 		end
 
 		term.setCursorPos( sx, sy )
 		term.write( string.rep(" ", w - sx + 1) )
 		term.setCursorPos( sx, sy )
 		if _sReplaceChar then
 			term.write( string.rep(_sReplaceChar, string.len(sLine) - nScroll) )
 		else
 			term.write( string.sub( sLine, nScroll + 1 ) )
 		end
 		term.setCursorPos( sx + nPos - nScroll, sy )
 	end
 
 	while true do
 		local sEvent, param = os.pullEvent()
 		if sEvent == "char" then
 			sLine = string.sub( sLine, 1, nPos ) .. param .. string.sub( sLine, nPos + 1 )
 			nPos = nPos + 1
 			redraw()
 
 		elseif sEvent == "key" then
 		    if param == 28 then
 				-- Enter
 				break
 			elseif param == 15 then
 				-- Tab
 				sLine = string.sub( sLine, 1, nPos ) .. "  " .. string.sub( sLine, nPos + 1 )
 				nPos = nPos + 2
 				redraw()
 			elseif param == 199 then
 				-- Home
 				nPos=0
 				redraw()
 			elseif param == 207 then
 				-- End
 				nPos=string.len(sLine)
 				redraw()
 			elseif param == 203 then
 				-- Left
 				if nPos > 0 then
 					nPos = nPos - 1
 					redraw()
 				end
 
 			elseif param == 205 then
 				-- Right
 				if nPos < string.len(sLine) then
 					nPos = nPos + 1
 					redraw()
 				end
 
 			elseif param == 200 or param == 208 then
                 -- Up or down
 				if _tHistory then
 					if param == 200 then
 						-- Up
 						if nHistoryPos == nil then
 							if #_tHistory > 0 then
 								nHistoryPos = #_tHistory
 							end
 						elseif nHistoryPos > 1 then
 							nHistoryPos = nHistoryPos - 1
 						end
 					else
 						-- Down
 						if nHistoryPos == #_tHistory then
 							nHistoryPos = nil
 						elseif nHistoryPos ~= nil then
 							nHistoryPos = nHistoryPos + 1
 						end
 					end
 
 					if nHistoryPos then
                     	sLine = _tHistory[nHistoryPos]
                     	nPos = string.len( sLine )
                     else
 						sLine = ""
 						nPos = 0
 					end
 					redraw()
                 end
             elseif param == 211 then
             	-- Delete
             	if nPos < string.len(sLine) then
             		sLine = string.sub(sLine,1,nPos) .. string.sub(sLine,nPos+2)
             		redraw()
             	end
 			elseif param == 14 then
 				-- Backspace
 				if nPos > 0 then
 					sLine = string.sub( sLine, 1, nPos - 1 ) .. string.sub( sLine, nPos + 1 )
 					nPos = nPos - 1
 					redraw()
 				end
 			end
 		end
 	end
 
 	term.setCursorBlink( false )
 	term.setCursorPos( w + 1, sy )
 	print()
 
 	return sLine
 end
 
 loadfile = function( _sFile )
 	local file = fs.open( _sFile, "r" )
 	if file then
 		local func, err = loadstring( file.readAll(), fs.getName( _sFile ) )
 		file.close()
 		return func, err
 	end
 	return nil, "File not found"
 end
 
 dofile = function( _sFile )
 	local fnFile, e = loadfile( _sFile )
 	if fnFile then
 		setfenv( fnFile, getfenv(2) )
 		fnFile()
 	else
 		error( e )
 	end
 end
 
 -- Install the rest of the OS api
 function os.run( _tEnv, _sPath, ... )
     local tArgs = { ... }
     local fnFile, err = loadfile( _sPath )
     if fnFile then
         local tEnv = _tEnv
         setmetatable( tEnv, { __index = _G } )
         setfenv( fnFile, tEnv )
         local ok, err = pcall( function()
         	fnFile( unpack( tArgs ) )
         end )
         if not ok then
         	if err and err ~= "" then
 	        	print( err )
 	        end
         	return false
         end
         return true
     end
     if err and err ~= "" then
 		print( err )
 	end
     return false
 end
 
 local nativegetmetatable = getmetatable
 function getmetatable( _t )
 	if type( _t ) == "string" then
 		error( "Attempt to access string metatable" )
 	end
 	return nativegetmetatable( _t )
 end
 
 local bProtected = true
 local function protect( _t )
 	local meta = getmetatable( _t )
 	if meta == "Protected" then
 		-- already protected
 		return
 	end
 
 	setmetatable( _t, {
 		__newindex = function( t, k, v )
 			if bProtected then
 				error( "Attempt to write to global" )
 			else
 				rawset( t, k, v )
 			end
 		end,
 		__metatable = "Protected",
 	} )
 end
 
 local tAPIsLoading = {}
 function os.loadAPI( _sPath )
 	local sName = fs.getName( _sPath )
 	if tAPIsLoading[sName] == true then
 		print( "API "..sName.." is already being loaded" )
 		return false
 	end
 	tAPIsLoading[sName] = true
 
 	local tEnv = {}
 	setmetatable( tEnv, { __index = _G } )
 	local fnAPI, err = loadfile( _sPath )
 	if fnAPI then
 		setfenv( fnAPI, tEnv )
 		fnAPI()
 	else
 		print( err )
 		return false
 	end
 
 	local tAPI = {}
 	for k,v in pairs( tEnv ) do
 		tAPI[k] =  v
 	end
 	protect( tAPI )
 
 	bProtected = false
 	_G[sName] = tAPI
 	bProtected = true
 
 	tAPIsLoading[sName] = nil
 	return true
 end
 
 function os.unloadAPI( _sName )
 	if _sName ~= "_G" and type(_G[_sName]) == "table" then
 		bProtected = false
 		_G[_sName] = nil
 		bProtected = true
 	end
 end
 
 function os.sleep( _nTime )
 	sleep( _nTime )
 end
 
 local nativeShutdown = os.shutdown
 function os.shutdown()
 	nativeShutdown()
 	while true do
 		coroutine.yield()
 	end
 end
 
 -- Install the lua part of the HTTP api (if enabled)
 if http then
 	local function wrapRequest( _url, _post )
 		local requestID = http.request( _url, _post )
 		while true do
 			local event, param1, param2 = os.pullEvent()
 			if event == "http_success" and param1 == _url then
 				return param2
 			elseif event == "http_failure" and param1 == _url then
 				return nil
 			end
 		end
 	end
 
 	http.get = function( _url )
 		return wrapRequest( _url, nil )
 	end
 
 	http.post = function( _url, _post )
 		return wrapRequest( _url, _post or "" )
 	end
 end
 
 -- Install the lua part of the peripheral api
 peripheral.wrap = function( _sSide )
 	if peripheral.isPresent( _sSide ) then
 		local tMethods = peripheral.getMethods( _sSide )
 		local tResult = {}
 		for n,sMethod in ipairs( tMethods ) do
 			tResult[sMethod] = function( ... )
 				return peripheral.call( _sSide, sMethod, ... )
 			end
 		end
 		tResult.type = peripheral.getType(_sSide)
 		tResult["getType"] = function() return peripheral.getType( _sSide ) end
 		tResult["getMethods"] = function() return peripheral.getMethods( _sSide ) end
 		tResult["isPresent"] = function() return peripheral.isPresent( _sSide ) end
 		return tResult
 	end
 	return nil
 end
 
 -- Protect the global table against modifications
 protect( _G )
 for k,v in pairs( _G ) do
 	if type(v) == "table" then
 		protect( v )
 	end
 end
 
 -- Load APIs
 local tApis = fs.list( "rom/apis" )
 for n,sFile in ipairs( tApis ) do
 	if string.sub( sFile, 1, 1 ) ~= "." then
 		local sPath = fs.combine( "rom/apis", sFile )
 		if not fs.isDir( sPath ) then
 			os.loadAPI( sPath )
 		end
 	end
 end
 
 if turtle then
 	local tApis = fs.list( "rom/apis/turtle" )
 	for n,sFile in ipairs( tApis ) do
 		if string.sub( sFile, 1, 1 ) ~= "." then
 			local sPath = fs.combine( "rom/apis/turtle", sFile )
 			if not fs.isDir( sPath ) then
 				os.loadAPI( sPath )
 			end
 		end
 	end
 end
 
 -- Run the shell
 local ok, err = pcall( function()
 	parallel.waitForAny(
 		function()
 			rednet.run()
 		end,
 		function()
 			os.run( {}, "rom/programs/shell" )
 		end
 	)
 end )
 
 -- If the shell errored, let the user read it.
 if not ok then
 	print( err )
 end
 
 pcall( function()
 	term.setCursorBlink( false )
 	print( "Press any key to continue" )
 	os.pullEvent( "key" )
 end )
 os.shutdown()