bash.lua

os.loadAPI("/boot/kernel.lua")
settings.load("/etc/settings")
function listen()
    while true do
        local event = {os.pullEvent("bash.cmd")}
        runCmd(event[2])
    end
end

local args = {...}


local oldPull = os.pullEventRaw
local coListen = coroutine.create(listen)
function os.pullEventRaw(sFilter)
    while true do
        local event = {oldPull()}
        if coroutine.status(coListen) == "suspended" then
            coroutine.resume(coListen, unpack(event))
        end
        if sFilter == event[1] or not sFilter then
            return unpack(event)
        end
    end
end
function loginShell()
    term.clear()
    term.setCursorPos(1,1)
    term.write(kernel.hostname .. " login: ")
    user = io.read()
    if settings.get(user) then
        term.clear()
        term.setCursorPos(1,1)
        term.write(user .. "'s password: ")
        pwd = textutils.serialize(hash.digest(read(" ")))
        password = textutils.serialise(settings.get(user))
        if pwd == password then
            initSession(user)
        else
            term.setCursorPos(1,2)
            term.write("Password incorrect.")
            os.sleep(3)
            loginShell()
        end
    end
end

if not kernel.bash.user() == nil then
    initSession(kernel.bash.user())
else
    loginShell()
end

function initSession(user)
    while true do
        term.write(user .. "@" ..kernel.hostname .. "[" .. getCurrentDir(user) .. "]: ")
        local cmd = io.read()
        local cursorX,cursorY = term.getCursorPos()
        term.setCursorPos(1,cursorY)
        if cmd == "exit" then
             break
        elseif cmd == "cd ~" then
             kernel.bash.nav("/home/".. user)
        else
             shell.run(cmd)
        end
    end
end

function getCurrentDir(user)
    local dir = kernel.bash.dir()
    if dir =="/home/".. user then
        return "~/"
    else
        return "/"..dir
    end
end