contrib/statusd/legacy/statusd_iface.lua

   1 -- Authors: Relu Patrascu <ikoflexer@gmail.com>
   2 -- License: LGPL, version 2.1 or later
   3 -- Last Changed: 2004-11-05
   4 --
   5 -- statusd_iface.lua
   6 --
   7 -- Copyright (c) Relu Patrascu 2004.
   8 --
   9 -- Ion is free software; you can redistribute it and/or modify it under
  10 -- the terms of the GNU Lesser General Public License as published by
  11 -- the Free Software Foundation; either version 2.1 of the License, or
  12 -- (at your option) any later version.
  13 --
  14 -- Nov. 5, 2004
  15 -- Disclaimer
  16 -- Neither am I a lua expert nor do I have the time to invest in writing
  17 -- better code here.  I simply needed this utility and it works OK for me.
  18 -- I give no guarantees of any kind for this code.  Suggestions for
  19 -- improvement are welcome.
  20 -- ikoflexer at gmail dot com
  21
  22 if not statusd_iface then
  23   statusd_iface={ interval=10*1000 }
  24 end
  25
  26 local iface
  27 local function get_iface_proc()
  28     local st, en
  29     local f=io.open('/proc/net/wireless', 'r')
  30     if not f then
  31         return ""
  32     end
  33     -- first 2 lines -- headers
  34     local s=f:read('*l')
  35     s=f:read('*l')
  36     -- the third line has wifi info
  37     s=f:read('*l')
  38     if not s then
  39                 f=io.open('/proc/net/dev', 'r')
  40                 if not f then
  41                         return "net off"
  42                 end
  43                 -- first 2 lines -- headers, next line check for lo
  44         s=f:read('*l')
  45         s=f:read('*l')
  46         s=f:read('*l')
  47         st, en, iface = string.find(s, '(%w+:)')
  48                 if iface == 'lo:' then
  49                 s=f:read('*l')
  50                 end
  51                 if not s then
  52                         return "net off"
  53                 end
  54         st, en, iface = string.find(s, '(%w+:)')
  55         f:close()
  56         return tostring(iface)
  57     end
  58     st, en, iface = string.find(s, '(%w+:)')
  59     f:close()
  60     return tostring(iface)
  61 end
  62
  63 local function get_iface_fn()
  64         return get_iface_proc
  65 end
  66
  67 local get_iface, iface_timer
  68
  69 local function update_iface()
  70     statusd.inform("iface", get_iface())
  71     iface_timer:set(statusd_iface.interval, update_iface)
  72 end
  73
  74 -- Init
  75 get_iface=get_iface_fn()
  76 iface_timer=statusd.create_timer()
  77 update_iface()
  78