contrib/package/freifunk-common/files/usr/sbin/ff_olsr_watchdog

   1 #!/usr/bin/lua
   2
   3 require "os"
   4 require "io"
   5 require "uci"
   6 local fs = require "nixio.fs"
   7
   8 if fs.access("/var/run/olsrd.pid") or fs.access("/var/run/olsrd4.pid") then
   9         local stamp, intv
  10         local x = uci.cursor()
  11
  12         x:foreach("olsrd", "LoadPlugin",
  13                 function(s)
  14                         if s.library == "olsrd_watchdog" then
  15                                 intv  = tonumber(s.interval)
  16                                 stamp = s.file
  17                         end
  18                 end)
  19
  20         if intv and fs.access(stamp) then
  21                 local systime = os.time()
  22                 local wdgtime = tonumber(io.lines(stamp)())
  23
  24                 if not wdgtime or ( systime - wdgtime ) > ( intv * 2 ) then
  25                         os.execute("logger -t 'OLSR watchdog' 'Process died - restarting!'")
  26                         local tnls = io.popen("ip tunnel show | cut -d : -f 1")
  27                         while true do
  28                                 tnl = tnls:read("*line")
  29                                 if tnl == nil then break end
  30                                 if string.find(tnl, "tnl_") == 1 then
  31                                         os.execute(string.format("logger -t 'OLSR watchdog' 'Deleting stale tunnel %s'", tnl))
  32                                         os.execute(string.format("ip link del %s", tnl))
  33                                 end
  34                         end
  35                         os.execute("/etc/init.d/olsrd restart")
  36                 end
  37         end
  38 end