utils/luci-app-lxc/files/controller/lxc.lua

   1 --[[
   2
   3 LuCI LXC module
   4
   5 Copyright (C) 2014, Cisco Systems, Inc.
   6
   7 Licensed under the Apache License, Version 2.0 (the "License");
   8 you may not use this file except in compliance with the License.
   9 You may obtain a copy of the License at
  10
  11         http://www.apache.org/licenses/LICENSE-2.0
  12
  13 Author: Petar Koretic <petar.koretic@sartura.hr>
  14
  15 ]]--
  16
  17 module("luci.controller.lxc", package.seeall)
  18
  19 require "ubus"
  20 local conn = ubus.connect()
  21 if not conn then
  22     error("Failed to connect to ubus")
  23 end
  24
  25
  26 function fork_exec(command)
  27         local pid = nixio.fork()
  28         if pid > 0 then
  29                 return
  30         elseif pid == 0 then
  31                 -- change to root dir
  32                 nixio.chdir("/")
  33
  34                 -- patch stdin, out, err to /dev/null
  35                 local null = nixio.open("/dev/null", "w+")
  36                 if null then
  37                         nixio.dup(null, nixio.stderr)
  38                         nixio.dup(null, nixio.stdout)
  39                         nixio.dup(null, nixio.stdin)
  40                         if null:fileno() > 2 then
  41                                 null:close()
  42                         end
  43                 end
  44
  45                 -- replace with target command
  46                 nixio.exec("/bin/sh", "-c", command)
  47         end
  48 end
  49
  50 function index()
  51         page = node("admin", "services", "lxc")
  52         page.target = cbi("lxc")
  53         page.title = _("LXC Containers")
  54         page.order = 70
  55
  56         page = entry({"admin", "services", "lxc_create"}, call("lxc_create"), nil)
  57         page.leaf = true
  58
  59         page = entry({"admin", "services", "lxc_action"}, call("lxc_action"), nil)
  60         page.leaf = true
  61
  62         page = entry({"admin", "services", "lxc_configuration_get"}, call("lxc_configuration_get"), nil)
  63         page.leaf = true
  64
  65         page = entry({"admin", "services", "lxc_configuration_set"}, call("lxc_configuration_set"), nil)
  66         page.leaf = true
  67
  68 end
  69
  70 function lxc_create(lxc_name, lxc_template)
  71         luci.http.prepare_content("text/plain")
  72
  73         local uci = require("uci").cursor()
  74
  75         local url = uci:get("lxc", "lxc", "url")
  76
  77         if not pcall(dofile, "/etc/openwrt_release") then
  78                 return luci.http.write("1")
  79         end
  80
  81         local target = _G.DISTRIB_TARGET:match('([^/]+)')
  82
  83         local data = conn:call("lxc", "create", { name = lxc_name, template = "download", args = { "--server", url,  "--no-validate", "--dist", lxc_template, "--release", "bb", "--arch", target } } )
  84
  85         luci.http.write(data)
  86 end
  87
  88 function lxc_action(lxc_action, lxc_name)
  89         luci.http.prepare_content("application/json")
  90
  91         local data, ec = conn:call("lxc", lxc_action, lxc_name and { name = lxc_name} or {} )
  92
  93         luci.http.write_json(ec and {} or data)
  94 end
  95
  96 function lxc_configuration_get(lxc_name)
  97         luci.http.prepare_content("text/plain")
  98
  99         local f = io.open("/lxc/" .. lxc_name .. "/config", "r")
 100         local content = f:read("*all")
 101         f:close()
 102
 103         luci.http.write(content)
 104 end
 105
 106 function lxc_configuration_set(lxc_name)
 107         luci.http.prepare_content("text/plain")
 108
 109         local lxc_configuration = luci.http.formvalue("lxc_configuration")
 110
 111         if lxc_configuration == nil then
 112                 return luci.http.write("1")
 113         end
 114
 115         local f, err = io.open("/lxc/" .. lxc_name .. "/config","w+")
 116         if not f then
 117                 return luci.http.write("2")
 118         end
 119
 120         f:write(lxc_configuration)
 121         f:close()
 122
 123         luci.http.write("0")
 124 end
 125