On 04/25/06 09:08, Andrew Gill wrote:
> Hello,
>
> I'm new to syslog-ng and am trying to configure it to run on HP-UX 10.20
> and 11.11. It seems to have problems reading from the /dev/log pipe.
> Each time a message is received on the pipe, syslog-ng hits an I/O error
> and closes the filehandle, and no more messages are received. However,
> the first message is always processed correctly.
>
> Here is my syslog-ng.conf:
> source src {
> pipe("/dev/log" pad_size(2048));
> internal();
> };
>
> destination d_file {
> file("/var/adm/syslog-ng/messages"
> owner(root)
> group(systaff)
> perm(0640)
> );
> };
>
> destination d_net {
> tcp(testy port(1514));
> };
>
> log {
> source(src);
> destination(d_file);
> destination(d_net);
> };
>
> When I run syslog-ng in the foreground with debug and verbose options,
> this is what I see:
>
> io.c: Preparing fd 3 for reading
> io.c: connecting using fd 6
> connecting fd 6 to inetaddr testy, port 1514
> syslog-ng version 1.6.10 starting
> io.c: Preparing fd 6 for writing
> io.c: Preparing fd 7 for writing
> io.c: do_read: read() failed (errno 11), Resource temporarily
> unavailable
> fd = 3, buffer = 00098b0, length = 2048
> Marking fd 3 for closing.
> Closing fd 3.
>
> The do_read line is when the message is received. syslog-ng continues
> to run, and internal messages (e.g. STATS) continue to show up on the
> local host and the remote loghost.
>
> Any thoughts would be greatly appreciated.
>
> -Andy
>
>
I think I figured this out...in libol's src/io.c an assumption is made that EAGAIN == EWOULDBLOCK, but this is not the case for HP-UX.
> egrep "EAGAIN|EWOULD" /usr/include/sys/errno.h
#define EAGAIN 11 /* No more processes */
#define EWOULDBLOCK 246 /* Operation would block */
I applied the following change to src/io.c and recompiled libol, and it works correctly now.
-Andy
-- io.c.orig Mon Mar 13 10:01:31 2006
+++ io.c Mon Mar 13 10:01:31 2006
@@ -361,6 +361,7 @@
case EINTR:
continue; /* FIXME: Is it really worth looping here,
* instead of in the select loop? */
+ case EAGAIN:
case EWOULDBLOCK: /* aka EAGAIN */
return 0;
case EPIPE:
@@ -415,6 +416,7 @@
continue; /* FIXME: Is it really worth looping here,
* instead of in the select loop? */
case EWOULDBLOCK: /* aka EAGAIN */
+ case EAGAIN:
return 0;
case EPIPE:
werror("io.c: recvfrom() returned EPIPE! Treating it as EOF.\n");