[rrd-users] RRDtool Pipe Transaction Delimiter

Tobias Oetiker tobi at oetiker.ch
Mon Aug 10 17:54:59 CEST 2009

Hi Larry,

Today Larry Adams wrote:

> All,
> I am writing a function in PHP that opens a bi-directional process to
> rrdtool using the syntax:
> rrdtool -
> As everyone is pretty much aware, this open a pipe that can receive
> commands from standard in and echo back on standard out.
> However, I wanted to confirm what character steam should be used to
> confirm that an entire package has been received from the rrdtool pipe.
> At the moment, I am using either of the following two substring matches:
> "OK"
> Is this sufficient?  Are there any other substring matches that tell me
> that the command has completed?

almost, but have a look at the graphv command since it can return
an inline graph, there  you have to just read the number of
characters advised before the graph is being dumped ...


> Thanks in Advance,
> Larry Adams
> TheWitness @
> www.cacti.net
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> rrd-users at lists.oetiker.ch
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Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900

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