stdout to buffer
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- Subject: stdout to buffer
- From: jseb <gmane2010@...>
- Date: 2013年7月15日 16:23:34 +0000 (UTC)
Hello,
I'd like to accumulate stdio to a buffer.
Let me explain:
I have a Lua server, which is waiting for various tasks to do (reading
and sourcing files, executing commands, …). He is listening on Unix
demain sockets.
>From a client, i type things like this:
source foo.file
exec for k,v in pairs(foo_buffer) do print(k,v) end
The «exec» function is this one:
function exec(client,command)
local chunk,err_msg = load(command)
if chunk then
_, err_msg = pcall(chunk)
end
if err_msg then
client:send(err_msg)
end
end
As you can see, all outputs to stdio will be done on the server-side.
(only errors will be send to client)
I'd like to redirect stdout to a buffer, and sending this buffer to the
client.
I could do something like this:
if chunk then
curr_stdout = io.output()
handle = io.output("/tmp/foo")
_, err_msg = pcall(chunk)
-- here, reading /tmp/foo to buffer
-- and then…
client:send(buffer)
io.output(curr_stdout)
io.close(handle)
end
I'm sure there's another way to do this.
Thank you.