settings Manager

function get(item)
local file = io.open("os/settings.txt","r")
local Content
repeat
    Content = {file.readLine()}
until Content[1] == item
file.close()
return(Content[2])
end

function set(item,var)
local file = io.open("os/settings.txt","r")
local Text = {file.readAll()}
file.close()
local Doc = io.open("os/settings.txt","w")
local Content
for i = 1, #Text do
    Content = Text[i]
    if Content[1] == item then Text[i][2] = var end
end
Doc.write(Text)
Doc.close()
return true
end

function add(item,var)
local file = io.open("os/settings.txt","a")
file.writeLine({item,var})
file.close()
return true
end