[mrtg] Re: Is there an easy way to do a latency check?

[Alex van den Bogaerdt]

paul beard wrote:

> write it to a text file and instead of doing an snmpget as your 
> target, use `cat /path/to/yourfile.txt` as the target. this just 
> means you can't run cfgmaker: you'll need to handcode the config 
> file, but you should be able to use the sample stuff.
> 
> ping -c 2 -q somehost.com | tail -1 | awk -F/ ' { print $6 }' > 
> /var/tmp/mrtg/somehost.com
> 
> then your config file would have Target[somehost]: 
> `cat/var/tmp/mrtg/somehost.com`

Note that this approach can occasionally fail if updating this
file happens to be done at exactly the same time mrtg tries to
read it.  MRTG will then see an empty file.

There is a way to overcome this:  write to a temporary file and
when finished move this file over the previous one.

cheers,
-- 
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