4 messages in net.sourceforge.lists.courier-imapRe: [Courier-imap] Patch for authdaem...| From | Sent On | Attachments |
|---|---|---|
| Norbert Kottmann | May 24, 2006 8:41 am | |
| Sam Varshavchik | May 24, 2006 3:21 pm | |
| Brian Candler | May 25, 2006 12:40 am | |
| Brian Candler | May 25, 2006 1:21 am |
| Subject: | Re: [Courier-imap] Patch for authdaemonlib.c opensock() function | |
|---|---|---|
| From: | Brian Candler (B.Ca...@pobox.com) | |
| Date: | May 25, 2006 1:21:59 am | |
| List: | net.sourceforge.lists.courier-imap | |
On Thu, May 25, 2006 at 08:40:52AM +0100, Brian Candler wrote:
Wrong.
The correct solution is to increase the number of authdaemond processes, in the authdaemonrc configuration file.
But his patch seems only to make a difference in the case of EAGAIN. According to the connect(2) manpage:
EAGAIN No more free local ports or insufficient entries in the routing cache. For PF_INET see the net.ipv4.ip_local_port_range sysctl in ip(7) on how to increase the number of local ports.
But the unix(7) manpage doesn't list EAGAIN.
In any case, if all the authdaemond processes are busy (i.e. maxdaemons is too small), would you really get EAGAIN in that case? I would have thought something like ECONNREFUSED or ETIMEDOUT, but I've not tested it.
OK, I have now. Under FreeBSD 5.4, I set
daemons=1 authmodulelist="authpipe"
and installed samplepipe.pl as authProg, but added "sleep(3);" at the top of function sendres()
Now if I run two authtest commands in two different windows:
# authtest fr...@example.com foobar
then the second waits behind the first. That is, after 3 seconds I get a result in the first window, then 3 seconds later I get a result in the second. The requests simply queue up.
I've also tried it with three authtests concurrently, and it's the same.
Now, maybe the semantics of Unix domain sockets are different between FreeBSD and Linux. However, if they are the same, then it would appear that having insufficient authdaemons is not a cause of the connect() call failing with EAGAIN (or conversely, if you are seeing EAGAIN errors, then increasing the number of authdaemons will not help you)
Regards,
Brian.