hexedit.lua

local term = require("term")
local component = require("component")
local shell = require("shell")
local fs = require("filesystem")
local drive = component.drive
local offset = 1
local data = {}
local filename = ""
local length = 0

local args = shell.parse(...)

filename = args[1]
length = drive.getCapacity()

local function displayBytes()
  length = drive.getCapacity()
  repeat
    data = drive.readByte(offset)
    offset = offset + 1
    term.write(string.format("%02x",math.abs(data)))
    local cursorX, cursorY = term.getCursor()
    term.setCursor(cursorX + 1, cursorY)
  until string.byte(data)  == 48
end

displayBytes()