Update slabos.lua

slabos.lua

@@ -1,5 +1,39 @@
 local basalt = require("/lib/basalt")
 
+config = {}
+if fs.exists("config.json") then
+    
+    local config_file = fs.open("/config.json","r")
+    local config_text = config_file.readAll()
+    config = textutils.unserialiseJSON(config_text)
+    config_file.close()
+    
+end
+
+if config.password then
+
+    while true do
+
+        if config.password == "" then
+            break
+        end
+
+        term.setCursorPos(1, 1) 
+        term.clear()
+        print("This device requires a password to start.")
+        write("Password: ")
+        local msg = read()
+
+        if msg == config.password then
+            break
+        else
+            print("Incorrect!")
+            sleep(1)
+        end
+
+    end
+end
+
 local main = basalt.getMainFrame()
 
 local FRAME_WIDTH = 26
@@ -12,6 +46,10 @@ local homescreen = main:addFrame()
     :setBackground(colours.blue)
     :setVisible(true) 
 
+if config.wallpaperColour then
+    homescreen:setBackground(colours[config.wallpaperColour])
+end
+
 local active_app_frames = {}
 local current_active_frame = homescreen