badcode9

Yes, options as you describe them, as well as input parameters such as numbers or strings that can be used by the program. eg. a farming program might accept the following: "farm 9 9"

The provided digits might indicate the dimensions to farm within.

To have any program run when the computer boots, you will need to call it from an autorun script.

1. First, what I would suggest is to place your program in the "/usr/bin" directory, that way it can be called by name without specifying the directory path. This is optional but I find it useful.
2. Next, create a new file in the root "/" directory, called "autorun.lua". In this script, use the following code, supposing your program name was "pass.lua". Then reboot it too test. 

os.execute("pass.lua")

--[[ 
  Password Lock Program for OpenComputers


  This program is designed to run indefinitely on a basic terminal to provide 
  password protection via redstone. It includes configurations for the door open
  duration, redstone output side, password, and an "admin" break password that will
  allow a user to gracefully terminate the program.


  By badcode9, 2016
]]

local component = require("component")

if not component.isAvailable("redstone") then
  io.stderr:write("This program requires either a Redstone Card Tier 1 or Redstone I/O block to run.\n")
  return
end
local rs = component.redstone

local os = require("os")
local term = require("term")
local text = require("text")
local sides = require("sides")




--[[ Config ]]-----------------------------------------------------------------
local pass = "password"
local d = 5 -- Door open duration
local s = sides.bottom -- Where to output redstone signal to open the door

--[[ Door Control ]]-----------------------------------------------------------
local function openDoor(duration)
  -- Open door for the duration provided, then close again.
  rs.setOutput(s, 0)
  os.sleep(duration)
  rs.setOutput(s, 255)
end

--[[ Main ]]-------------------------------------------------------------------

-- Close door on init
rs.setOutput(s, 255)

while true do
 term.clear()

 -- Password Request
 print("Enter Password:")
 answer = text.trim(term.read(nil, false, nil, "*"))  -- Masking input characters; trim newline
 term.setCursor(1,2)
 term.clearLine()

 -- Password Check
 if answer == "admin" then -- admin pwd to break execution
  term.clear()
  print("Admin Override\n")
  return
 elseif answer == pass then
   print("ACCESS GRANTED")
   openDoor(d)
 else
   print("ACCESS DENIED")
   os.sleep(3)
 end
end

I am having a similar issue with accessing the robots internal inventory, but it doesn't appear that there is a dedicated function. I want to count the number of slots in the robots inventory, and anticipated that the function, getInventorySize(side: number): number or nil[, string] would work.

However, when I use this function specifying "sides.back", I get an unsupported sides error (like Jalopy43 did).

Does anybody know how I can accomplish this without the need for an additional block?

Thanks!

jhagrid77,

Would you have any insight on how to properly use program arguments? An example script would be phenomenal.

Cheers

Hi The Duke of Crawley,

I was actually working on something very similar as well this weekend. I opted to use the term.read() function, which allows you to mask the input. I don't think io.read() does this.. Would be cool if you could link the documentation for that function.

Here's a snippet of my code. I'd be happy to share the whole program with you if you'd like.

answer = text.trim(term.read(nil, false, nil, "*"))  -- Masking input characters; trim newline

Note that the one downside to using term.read() is that it will also append a "\n" newline to your input which can cause the input not no match your configured password of course. I resolved this by using the text.trim() to remove it.

Hope this helps.

Cheers!