Gonzalo Merayo, el 29 de octubre a las 15:14 me escribiste:
> > 1) redirigir stdout a stdin de nc.
> > 2) redirigir stdout de nc a la "consola" (el el ex-stdout de mi script)
> > 3) correr el nc en background
> > 4) tirar echos desde el script, que los "procese" el nc y que la salida
> > del nc vaya a la consola
> >
> > Se entiende?
>
> Hice la prueba de hacerlo con un mkfifo pero se ve que esta optimizado
> para transferir cosas grandes por que los buffers acumulan varios
> segundos antes de mandar.
Por las dudas comento que ya lo solucioné con el while ... done | nc. Lo
quería para hacer un monitor del MPD[1] para el ion3[2], que adjunto por
si a alguien le sirve =)
--
Leandro Lucarella (luca) | Blog colectivo: http://www.mazziblog.com.ar/blog/
.------------------------------------------------------------------------,
\ GPG: 5F5A8D05 // F8CD F9A7 BF00 5431 4145 104C 949E BFB6 5F5A 8D05 /
'--------------------------------------------------------------------'
A veces quisiera ser un avion,
para volar como vuelo siendo humano,
y no caerme como me caigo.
-- statusd for MPD (Music Player Daemon) using a single persistent connection
--
-- bugs/requests/comments: Leandro Lucarella <[EMAIL PROTECTED]>
--
-- Based on statusd_exec.lua from Antti Vähäkotamäki (the async code) and
-- statusd_mpd.lua from [EMAIL PROTECTED] (the mpd glue code).
--
-- Usage is self documented in the default settings section. It provides the
-- same functionality from statusd_mpd.luam from [EMAIL PROTECTED] but it
-- uses a single persistent connection to MPD and does better usage from hints
-- (the status is "hinted important" when mpd status or volume change (and
-- optionally, up to important_time seconds from the begining of each song).
--
-- This is free software; you can redistribute it and/or modify it under
-- the terms of the GNU Lesser General Public License as published by
-- the Free Software Foundation; either version 2.1 of the License, or
-- (at your option) any later version.
local defaults={
-- netcat path
netcat = 'netcat',
-- 500 or less makes seconds increment relatively smoothly while playing
update_interval = 1000,
-- mpd server info (localhost:6600 are mpd defaults)
address = "localhost",
port = 6600,
-- mpd password (if any)
password = nil,
-- seconds to consider the mpd in 'important' hint (0 never, -1 always)
important_time = 10, -- seconds
-- display template
-- ---
-- can use the following:
-- track metadata: %artist, %title, %num, %album, %year, %len
-- current track position: %pos
-- volume: %volume
-- escape for the percent character: %%
-- a default template
template = "%artist - %num - %title (%pos / %len)"
}
local settings = table.join(statusd.get_config("mpd"), defaults)
local timer
local last_volume
local last_state
-- Function for starting and restarting execution of a process
local function start_execution()
-- Set up a function for receiving the data
-- and informing the statusbar
local function process_input(data)
-- At first, we are not initialized
local inited = false
-- When we get new data, output the last complete line
while data do
if not inited then
-- welcome msg
if string.sub(data, 1, 6) ~= "OK MPD" then
statusd.inform("mpd_hint", "critical")
statusd.inform("mpd", "bad mpd response on init")
end
-- 'password' response (if necessary)
if settings.password ~= nil then
if string.sub(data, 1, 2) ~= "OK" then
statusd.inform("mpd_hint", "critical")
statusd.inform("mpd_hint", "bad mpd password")
end
end
-- everything ok, receive more data
inited = true
data = coroutine.yield()
end
local info = {}
local hint = "normal"
for attrib, val in string.gfind(data, "([^\n]-): ([^\n]*)") do
if attrib == "time" then
_, _, info.pos, info.len = string.find(val, "(%d+):(%d+)")
if settings.important_time == -1
or info.pos+0 <= settings.important_time
and settings.important_time ~= 0 then
hint = "important"
end
info.pos = string.format("%d:%02d", math.floor(info.pos /
60),
math.mod(info.pos, 60))
info.len = string.format("%d:%02d", math.floor(info.len /
60),
math.mod(info.len, 60))
elseif attrib == "state" then
info.state = val
if info.state ~= last_state then
hint = "important"
end
last_state = info.state
elseif attrib == "volume" then
info.volume = val .. "%"
if info.volume ~= last_volume then
hint = "important"
end
last_volume = info.volume
elseif attrib == "Artist" then
info.artist = val
elseif attrib == "Title" then
info.title = val
elseif attrib == "Album" then
info.album = val
elseif attrib == "Track" then
info.num = val
elseif attrib == "Date" then
info.year = val
end
end
-- done querying; now build the string
statusd.inform("mpd_hint", hint)
if info.state == "play" then
local mpd_st = settings.template
-- fill in %values
mpd_st = string.gsub(mpd_st, "%%([%w%_]+)",
function (x) return(info[x] or "") end)
mpd_st = string.gsub(mpd_st, "%%%%", "%%")
statusd.inform("mpd", mpd_st)
elseif info.state == "pause" then
statusd.inform("mpd", "Paused")
else
statusd.inform("mpd", "No song playing")
end
-- Wait for bgread to signal that more data
-- is available or the program has exited
data = coroutine.yield()
end
-- Program has exited.
-- Start a timer for a new execution if set.
timer:set(settings.update_interval,
function() start_execution() end)
end
-- Set up a simple function for printing errors
local function process_error(data)
while data do
io.stderr:write("ion-statusd [statusd_mpd]: " .. data)
io.stderr:flush()
data = coroutine.yield()
end
end
-- Execute the program in the background and create
-- coroutine functions to handle input and error data
local sleep = settings.update_interval / 1000
sleep = string.gsub(sleep, '(%d+),(%d+)', '%1.%2')
local cmd = 'while sleep ' .. sleep .. '; do ' ..
'echo "status\ncurrentsong"; done | ' ..
settings.netcat .. ' ' .. settings.address .. ' ' ..
settings.port
if settings.password ~= nil then
cmd = "echo 'password " .. settings.password .. "'; " .. cmd
end
statusd.popen_bgread(cmd, coroutine.wrap(process_input),
coroutine.wrap(process_error))
end
-- Now start execution of all defined processes
timer = statusd.create_timer()
start_execution()
-- vim: set et sts=4 sw=4 :
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