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local alien = require 'alien'
local structs = require 'structs'
local struct = require 'alien.struct'

local function listdir(path)
  local result = {}
  local libc = alien.default
  libc.strerror:types("string", "int")
  libc.opendir:types("pointer", "string")
  libc.readdir:types("pointer", "pointer")
  libc.closedir:types("int", "pointer")

  local dirh = libc.opendir(path)
  if (dirh == nil) then
    err = alien.errno()
    merr = libc.strerror(err)
    log.crit("opendir('%s') returned: errno=(%d) %s", tostring(path), err, merr)
    error("Failed to open: ".. path)
  end

  while true do
    dp = libc.readdir(dirh)
    if dp == nil then
      break
    end

    local s = struct.unpack("s", dp, structs.dirent.__size, structs.dirent.d_name + 1)
    log.crit("str: %d: %s", structs.dirent.d_name, s)
    table.insert(result, s)
  end

  return result
end