proxmark3/client/scripts/cmdline.lua

print("This is how a cmd-line interface could be implemented\nPrint 'exit' to exit.\n")
local answer
repeat
    io.write("$>")
    io.flush()
    answer=io.read()
    if answer ~= 'exit' then
        local func = assert(loadstring("return " .. answer))
        io.write("\n"..tostring(func() or "").."\n");
    end--]]
until answer=="exit"
print("Bye\n");