Apologies for my broken email client, which shall remain nameless!

> > # default contrib'd version
> > # source s_sys { pipe("/dev/log"); internal(); };
> >
> > # recommended by INSTALL
> > source s_sys { pipe("/dev/log" pad_size(2048)); };
>
> This should be the proper source statement. I've just retested it on our
> local HP-UX box and it seems to work fine.
>
> The things you are experiencing seems to indicate that the pad_size()
> option is missing, therefore I'd like to ask if you are certain that
> syslog-ng is running with the pad_size() configuration.

Yep, it definitely appears to be opening the configuration file that I'm playing with:

# nohup /opt/tusc/bin/truss -o /tmp/syslog-ng.truss -aef /usr/local/sbin/syslog-ng --debug --foreground --stderr > syslog-ng.out 2>&1 &
# grep syslog-ng.conf /tmp/syslog-ng.truss
7197:   open("/usr/local/etc/syslog-ng.conf", O_RDONLY|O_LARGEFILE, 0666) = 4
#

> If you still think it is, you might want to use tusc to check if
> syslog-ng reads /dev/log in 2048 byte chunks (which is should if
> pad_size() is enabled and which it doesn't if it is not).

Most of the time it does, but sometimes it doesn't:

7197:   read(4, "< 3 8 > S e p     7   1 0 : 5 2 ".., 8192) = 2048
7197:   read(4, 0x40025dbd, 8187)                           ERR#11 EAGAIN
7197:   read(4, "< 2 8 > S e p     7   1 0 : 5 3 ".., 8187) = 2048
7197:   read(4, "< 2 7 > S e p     7   1 0 : 5 3 ".., 8187) = 4096
7197:   read(4, 0x40025db8, 8192)                           ERR#11 EAGAIN
7197:   read(4, "< 2 2 > S e p     7   1 0 : 5 4 ".., 8192) = 4096
7197:   read(4, "< 2 2 > S e p     7   1 0 : 5 4 ".., 8187) = 2048
7197:   read(4, 0x40025dbd, 8187)                           ERR#11 EAGAIN
7197:   read(4, "< 2 2 > S e p     7   1 0 : 5 4 ".., 8187) = 2048
7197:   read(4, 0x40025dbd, 8187)                           ERR#11 EAGAIN
7197:   read(4, "< 3 8 > S e p     7   1 0 : 5 5 ".., 8187) = 8187
7197:   read(4, "\0\0\0\0\0< 3 8 > S e p     7   ".., 8192) = 6149
7197:   read(4, "< 2 2 > S e p     7   1 0 : 5 5 ".., 8187) = 8187
7197:   read(4, "u s . n e ", 8173)                         = 5
7197:   read(4, "< 2 8 > S e p     7   1 0 : 5 5 ".., 8168) = 2048
7197:   read(4, "< 2 7 > S e p     7   1 0 : 5 5 ".., 8187) = 4096
7197:   read(4, 0x40025db8, 8192)                           ERR#11 EAGAIN
7197:   read(4, "< 2 8 > S e p     7   1 0 : 5 7 ".., 8192) = 2048
7197:   read(4, "< 2 7 > S e p     7   1 0 : 5 7 ".., 8187) = 4096
7197:   read(4, 0x40025db8, 8192)                           ERR#11 EAGAIN
7197:   read(4, "< 2 8 > S e p     7   1 0 : 5 9 ".., 8192) = 2048
7197:   read(4, "< 2 7 > S e p     7   1 0 : 5 9 ".., 8187) = 4096
7197:   read(4, 0x40025db8, 8192)                           ERR#11 EAGAIN
7197:   read(4, "< 3 8 > S e p     7   1 1 : 0 0 ".., 8192) = 2048
7197:   read(4, "< 3 8 > S e p     7   1 1 : 0 0 ".., 8192) = 8192
7197:   read(4, "< 3 8 > S e p     7   1 1 : 0 0 ".., 8192) = 8192
7197:   read(4, "< 3 8 > S e p     7   1 1 : 0 0 ".., 8192) = 8192
7197:   read(4, "< 2 2 > S e p     7   1 1 : 0 0 ".., 8192) = 8192
7197:   read(4, "< 2 2 > S e p     7   1 1 : 0 0 ".., 8187) = 8187
7197:   read(4, "\0\0\0\0\0", 8192)                         = 5
7197:   read(4, "< 2 8 > S e p     7   1 1 : 0 1 ".., 8192) = 2048
7197:   read(4, "< 2 7 > S e p     7   1 1 : 0 1 ".., 8187) = 4096
7197:   read(4, 0x40025db8, 8192)                           ERR#11 EAGAIN

Regards,

Scott