Having upgraded from 5.4 to 6.1-PRERELEASE on two systems I find that ipmon
produces an output on one but not the other. "truss ipmon" on the
non-
functioning system produces
. . .
open("/var/run/ipmon.pid",0x601,0644) = 4 (0x4)
getdtablesize() = 11095 (0x2b57)
fcntl(4,F_GETFL,0x0) = 1 (0x1)
getpid() = 88512 (0x159c0)
fstat(4,0xbfbfc900) = 0 (0x0)
write(4,0x805f000,5) = 5 (0x5)
close(4) = 0 (0x0)
sigaction(SIGHUP,{ 0x8049510
0x0|ONSTACK|RESETHAND|NOCLDSTOP|NODEFER|NOCLDWAIT|SIGINFO ss_t },{ SIG_DFL
0x0|ONSTACK|RESTART|RESETHAND|NOCLDSTOP|NODEFER|NOCLDWAIT|SIGINFO ss_t }) = 0
(0x0)
ioctl(3,FIONREAD,0xbfbfccfc) = 0 (0x0)
nanosleep({1 0}) = 0 (0x0)
ioctl(3,FIONREAD,0xbfbfccfc) = 0 (0x0)
leading to endless iterations of nanosleep, whereas the system w/ the working
ipmon begins to write packet pass/block values @ this point.
there are no relevant kernel differences (ipfilter, ipfilter log, & ipfilter
default block are compiled into both). both run 6.1-PRERELEASE on i386,
loader.conf sysctl.conf are the same on both systems, rc.conf is the same in
all relevent respects w/ the possible exception that the system w/the non-
working ipmon is natting, & both system have the same modules installed.
i'd appreciate suggestions for troubleshooting this problem.
thanks.
==========David Coder
Erstwhile Network Engineer
Washington, DC