> Hi Ethan, list,
>
> I made a patch to make Nagios handle nicely perfdata_file as pipes. What
> it does is add a new file mode; i.e.:
>
> host_perfdata_file_mode=p
> service_perfdata_file_mode=p
>
> When set to "p", it will use open with O_NONBLOCK | O_RDWR, then fdopen
> on the fd, so that the fd will be left with O_NONBLOCK. This will allow
> Nagios to open the pipe without blocking even if there's no reader. It
> will also avoid loosing data if the reader goes away for a short period
> of time (ex. performance data daemon restart)
>
> While testing it I also found out there's a bug in the argument
> processing. strstr returns the pointer to the search string. so that
> if(!strstr(...)) is like saying if(string not there). The original code
> looked like this:
>
> if(!strstr(varvalue,"w"))
> xpddefault_host_perfdata_file_append=FALSE;
>
> So I changed that to explicitly check if the value is not NULL. This
> explains why with "w" I was seeing O_APPEND from strace
>
> If you accept this patch I'll submit a complete patch including doc and
> sample config modifications. I can also backport it to the 2-x branch if
> you're willing to accept it.
>
> Thanks,
>
> Thomas
>
Thanks! I'll get this applied to the Nagios 3 CVS code today.
Ethan Galstad,
Nagios Developer
---
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Website: http://www.nagios.org
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