RE: [Ntop-dev] ntop-3.2-0.fc2 crashes

Burton Strauss Tue, 06 Dec 2005 10:35:11 -0800

Title: RE: [Ntop-dev] ntop-3.2-0.fc2 crashes

Please use the list, unless you are looking for fee-based support (which I'm happy to provide, btw).

gdb is a wonderful pit of arcana... you are right about run.

As you have done, you can try using ntop's -K switch ... that disables the fork() calls and other stuff, which is enough of a change that you don't always see the same problems.

You can try adding the gdb parameter 'set follow-fork-mode child' before the run, e.g.:

gdb /usr/local/bin/ntop
...
(gdb) set args -u root -i eth0 @/etc/ntop.conf -K
(gdb) set follow-fork-mode child
(gdb) r

That should follow ntop through it's daemonizing process. Usually I just remove the daemonizing switch from the .conf file, however.

Inside gdb, you may also see it break on SIGPIPE ... that's something that just happens and can't be worked around, so if you see it, just type cont (continue) and it will continue... The bomb you are looking for is probably a SIGSEGV.

-----Burton

From: Todd Bushnell [mailto:[EMAIL PROTECTED]
Sent: Tuesday, December 06, 2005 11:54 AM
To: [EMAIL PROTECTED]
Subject: RE: [Ntop-dev] ntop-3.2-0.fc2 crashes

Thanks for the guidance – sorry for not RTFM :-\

Forgive my gdb ignorance, but when I try running ntop via gdb using the faq instructions I’m unable to launch the browser (which I can do one time (before crashing) when I run ntop regularly). I then assumed that it was implied that we need to do a “run” in gdb after setting the arguments. When I try this I get the following:

[EMAIL PROTECTED] pts -={09:40/06-Dec-05}=-

Tue Dec 6 09:45:52 2005 Initializing gdbm databases

Detaching after fork from child process 14763.

Program exited normally.

Am I doing something wrong?

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RE: [Ntop-dev] ntop-3.2-0.fc2 crashes

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