[net_freebsd] Switched to async spawn

widgets/net_freebsd.lua

@@ -1,10 +1,12 @@
 -- {{{ Grab environment
 local tonumber = tonumber
 local os = { time = os.time }
-local setmetatable = setmetatable
 local helpers = require("vicious.helpers")
-local io = { popen = io.popen }
+local spawn = require("vicious.spawn")
-local string = { match = string.match }
+local string = { 
+    match = string.match,
+    gmatch = string.gmatch
+}
 -- }}}
 
 
@@ -21,15 +23,13 @@ local unit = { ["b"] = 1, ["kb"] = 1024,
 }
 
 -- {{{ Net widget type
-local function worker(format, warg)
+local function parse(stdout, stderr, exitreason, exitcode)
-    if not warg then return end
 
     local args = {}
     local buffer = nil
-    local f = io.popen("netstat -n -b -I " .. helpers.shellquote(warg))
     local now = os.time()
     
-    for line in f:lines() do
+    for line in string.gmatch(stdout, "[^\n]+") do
         if not (line:find("<Link") or line:find("Name")) then -- skipping missleading lines
             local split = { line:match(("([^%s]*)%s*"):rep(12)) }
 
@@ -41,8 +41,6 @@ local function worker(format, warg)
         end
     end
 
-    f:close()
-
     if buffer == nil then
         args["{carrier}"] = 0
         helpers.uformat(args, "rx", 0, unit)
@@ -78,6 +76,12 @@ local function worker(format, warg)
     return args
 
 end
+
+function net_freebsd.async(format, warg, callback)
+    if not warg then return callback{} end
+    spawn.easy_async("netstat -n -b -I " .. helpers.shellquote(warg),
+                     function (...) callback(parse(...)) end)
+end
 -- }}}
 
-return setmetatable(net_freebsd, { __call = function(_, ...) return worker(...) end })
+return helpers.setasyncall(net_freebsd)