modules/niu/luasrc/controller/niu/system.lua

   1 --[[
   2 LuCI - Lua Development Framework
   3
   4 Copyright 2009 Steven Barth <steven@midlink.org>
   5
   6 Licensed under the Apache License, Version 2.0 (the "License");
   7 you may not use this file except in compliance with the License.
   8 You may obtain a copy of the License at
   9
  10         http://www.apache.org/licenses/LICENSE-2.0
  11
  12 $Id$
  13 ]]--
  14
  15 local require, pairs, unpack = require, pairs, unpack
  16 module "luci.controller.niu.system"
  17
  18 function index()
  19         entry({"niu", "system"}, nil, "System").dbtemplate = "niu/system"
  20
  21         entry({"niu", "system", "general"},
  22         cbi("niu/system/general", {on_success_to={"niu"}}), "General", 10)
  23
  24         entry({"niu", "system", "backup"}, call("backup"), "Backup Settings", 20)
  25 end
  26
  27 function backup()
  28         local os = require "os"
  29         local uci = require "luci.model.uci".cursor()
  30         local nixio, nutl = require "nixio", require "nixio.util"
  31         local fs = require "nixio.fs"
  32         local http = require "luci.http"
  33
  34
  35         local call = {"/bin/tar", "-cz"}
  36         for k, v in pairs(uci:get_all("luci", "flash_keep")) do
  37                 if k:byte() ~= 46 then  -- k[1] ~= "."
  38                         nutl.consume(fs.glob(v), call)
  39                 end
  40         end
  41
  42
  43         http.header(
  44                 'Content-Disposition', 'attachment; filename="backup-%s-%s.tar.gz"' % {
  45                         nixio.uname().nodename, os.date("%Y-%m-%d")
  46                 }
  47         )
  48         http.prepare_content("application/x-targz")
  49
  50
  51         local fdin, fdout = nixio.pipe()
  52         local devnull = nixio.open("/dev/null", "r+")
  53         local proc = nixio.fork()
  54
  55         if proc == 0 then
  56                 fdin:close()
  57                 nixio.dup(devnull, nixio.stdin)
  58                 nixio.dup(devnull, nixio.stderr)
  59                 nixio.dup(fdout, nixio.stdout)
  60                 nixio.exec(unpack(call))
  61                 os.exit(1)
  62         end
  63
  64         fdout:close()
  65         http.splice(fdin)
  66         http.close()
  67 end