Jane,
I had the same issue of wanting to know if there was anything to read before
I actually committed to reading the socket descriptor. Since the read does
not have a timeout parm, if you commit to read and there is nothing there,
you are stuck.
I used the API called poll() to check the status of the descriptor
before I issued the recv()
Poll() is a little tricky because it expects a pointer to an array of
descriptors and the status of each descriptor you want to check, rather than
a single descriptor and status. Then it return the number of descriptor that
match the status you ask for.
If you think it will work for you I can track down my prototype and a snip
of code.
Charlie
-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Jane Taubman
Sent: Wednesday, September 18, 2013 2:57 AM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Re: TCP/IP Buffer to variable in Scott Klement's sample
Thanks all, I ended up using the %SUBST on the recbuf field and used it's
length to eval the data into the Q field and that seemed to fix the problem,
I have a second problem if anyone knows a quick answer. The readln()
function waits for data to arrive, but I need to be able to check for data
arriving with out waiting, eg
While socket open do
if data in buffer then
readline
else
read down data Queue don't wait
if data then send down socket
end
end
Does anyone know how I can check for data with out reading it.
Thanks again for the help
--
Jane.
--
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