[rrd-developers] suggestion: increase MAX_VNAME_LEN ?

[George Coulouris]

Hello,

First, kudos! rrdtool 1.2 rocks.

Is it possible to make MAX_VNAME_LEN larger, perhaps FILENAME_MAX?

It's very easy to overflow the default MAX_VNAME_LEN of 29 when you're 
constructing vnames in an automated fashion (e.g. 
DEF:${MACHINE}_${RRDNAME}).

The following (or similar) should do the job:

$ diff rrd_graph.h.orig rrd_graph.h
8,9c8,9
< #define MAX_VNAME_LEN 29
< #define DEF_NAM_FMT "%29[-_A-Za-z0-9]"
---
 > #define MAX_VNAME_LEN 64
 > #define DEF_NAM_FMT "%64[-_A-Za-z0-9]"

Thanks!

Regards,
George Coulouris
National Center for Biotechnology Information (contractor)

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