Jorgen Lundman:
> However, I found that this works:
>
> char buffer[1];
> if ((write(fd, buffer, 0) < 0) && (errno == EPIPE)) {
> msg_warn("write_wait() connection reset %d", fd);
> return 0;
> }
Try:
return -1;
Then it won't send "221 Bye".
Wietse
> pollfd.fd = fd;
> pollfd.events = POLLOUT;
> for (;;) {
> switch (poll(&pollfd, 1, timeout < 0 ?
> WAIT_FOR_EVENT : timeout * 1000)) {
>
>
> Which truss shows as:
>
> 22179: 0.0000 read(11, " Q U I T\r\n", 4096) = 6
> 22179: 0.0001 ioctl(11, FIONREAD, 0x08047614) Err#131
> ECONNRESET
> 22179: 0.0000 write(11, 0x0804782F, 0) Err#32 EPIPE
> 22179: 0.0001 Received signal #13, SIGPIPE [ignored]
> 22179: 0.0000 write(11, " 2 2 1 2 . 0 . 0 B y".., 15) Err#32 EPIPE
> 22179: 0.0000 Received signal #13, SIGPIPE [ignored]
> 22179: 0.0001 close(11) = 0
>
>
> It is interesting to note the errno changed to EPIPE when calling write()
> instead of read().
>
> Is a write( ,0) always non-blocking? Probably needs answering.
>
>
> Running with L4 health checks for 20mins and:
>
> # ps -edaf| grep smtpd | wc -l
> 2
>
>
> Everything "appears to work" but I have no put it on production. I do wish
> there was a nicer way to detect the problem than to use a zero-write.
> Possibly signal the problem in peekfd(), and act on it in write_wait().
>
>
>
> --
> Jorgen Lundman | <lund...@lundman.net>
> Unix Administrator | +81 (0)3 -5456-2687 ext 1017 (work)
> Shibuya-ku, Tokyo | +81 (0)90-5578-8500 (cell)
> Japan | +81 (0)3 -3375-1767 (home)
>
