[rrd-users] Supressing RRDTool "OK" message in pipe mode
Alex van den Bogaerdt
alex at vandenbogaerdt.nl
Fri Feb 27 18:12:42 CET 2009
----- Original Message -----
From: "Phix" <mark at phix.me>
To: <rrd-users at lists.oetiker.ch>
Sent: Friday, February 27, 2009 5:09 PM
Subject: [rrd-users] Supressing RRDTool "OK" message in pipe mode
> This isn't a problem as such, more a quirk I am interested in solving. I
> running rrdtool in pipe mode (which is "rrdtool -" at the command line)
> passing it a graph definition. It then spits back a binary stream which is
> the PNG file data, but right at the end of this stream, it adds it's usual
> "OK" message, something like "OK u:2.86 s:0.14 r:3.00".
> Obviously, this isn't part of the PNG stream - is there anyway of turning
> this off so it doesn't print this "garbage" at the end? The documentation
> says that when pipe mode is invoked, RRDTool should suppress all other
> output except the PNG stream, but this is not happening in my case (I'm
> running RRDtool 1.2.18).
> Any feedback would be much appreciated.
The "graph" command does suppress any other output, but "rrdtool -" does
I have no answer to your question about turning this off, but I do have a
I assume you do something like: echo graph - DEF:... AREA:... | rrdtool -
Why? Why are you doing this in pipe mode?
Maybe I'm missing something here, but I see no benefit in running a single
rrdtool command in pipe mode.
Changing your command line to "rrdtool graph - DEF:... AREA:..." would solve
the problem, but does not answer your question.
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