OpenWrt LuCI Wol web interface

wol.lua

--[[
 FILE: /usr/lib/lua/luci/controller/wolapp/wol.lua

 USAGE: http://..../cgi-bin/luci/wolapp/wol?m=xx:xx:xx:xx:xx:xx
]]--
module("luci.controller.wolapp.wol", package.seeall)

function index()
    entry({"wolapp", "wol"}, call("action_wol"), "W-O-L", 10).dependent=false
end

function action_wol()
  local fs = require "nixio.fs"
  luci.http.prepare_content("text/plain")
  local m = luci.http.formvalue("m")

  local outfile = os.tmpname()
  local errfile = os.tmpname()
  local rv = os.execute("/usr/bin/wol %s >%s 2>%s" %{ m, outfile, errfile })
  local stdout = fs.readfile(outfile, 1024 * 512) or ""
  local stderr = fs.readfile(errfile, 1024 * 512) or ""
  fs.unlink(outfile)
  fs.unlink(errfile)

  luci.http.write("ADDRESS: %s \n" % {m})
  luci.http.write("%s\n%s\n" % {stdout, stderr}) 

end