Issue with Regex and NORRDDISKS Setting

Hi J.C.,

It doesn't seem to be working with or without the escape backslash. It
doesn't show up in the env output either way.

root@<host> ~]# grep NORRDDISK /etc/xymon/xymonserver.cfg
NORRDDISKS="^/dev|^/var|^/tmp$"
[root@<host> ~]# xymoncmd env | grep NORRD
2016-03-02 14:18:47.151545 xgetenv: Cannot find value for variable
NORRDDISKS=^/dev|^/var|^/tmp

[root@<host> ~]# grep NORRDDISK /etc/xymon/xymonserver.cfg
NORRDDISKS="^/dev|^/var|^/tmp\$"
[root@<host> ~]# xymoncmd env | grep NORRD
2016-03-02 14:17:47.233910 xgetenv: Cannot find value for variable
NORRDDISKS=^/dev|^/var|^/tmp


When I do it with them grouped together, it gives me the same result:

[root@<host> ~]# grep NORRDDISK /etc/xymon/xymonserver.cfg
NORRDDISKS="^(/dev|/var|/tmp)$"
[root@<host> ~]# xymoncmd env | grep NORRD
2016-03-02 14:20:35.984507 xgetenv: Cannot find value for variable
NORRDDISKS=^(/dev|/var|/tmp)

Any ideas?

Thanks!!

--
Matt Vander Werf

On Wed, Mar 2, 2016 at 11:50 AM, J.C. Cleaver <user-87556346d4af@xymon.invalid>
wrote:

On Wed, March 2, 2016 8:31 am, Matt Vander Werf wrote:

Hello,

Looking at past list e-mails, it is my understanding that the NORRDDISKS
setting in xymonserver.cfg allows for PCRE regular expressions. Is this
correct? Or does it only allow certain PCRE regular expressions, but not
everything?

I ask because I'm experiencing an issue with my NORRDDISKS setting.

I'd like to ignore disks for graphing that have mount points "/tmp", but
not ignore disks with mount points that have "tmp" in them, like
"/tmpscratch".

I noticed that for other disk mount point names that if you just use
"^/<name>" with no modifiers, then it only ignores disk mount points with
only exactly "^/<name>" and not "^/<name><additional text>" or
"^/<name>/<more name>" (at least from what I can tell).

For example when using:

NORRDDISKS="^/dev|^/tmp|^/var"

It ignores disks with mount points "/dev" and "/var", but also "/tmp" AND
"/tmpscratch". But it doesn't look like it ignores "/var/tmp" (at least
as
far as I can tell).

I tried using "^/tmp$" and that didn't work either (still ignored both
names).


Any idea what's going on here? Or how this can be done correctly? Is the
"$" metacharacter not allowed in this setting?


If it's needed, I'm running the latest 4.3.26-1 Terabithia RPM on RHEL 7.

Thanks for any help!!

--
Matt Vander Werf

Try checking the output of 'xymoncmd env | grep NORRD' ? If the '$' is not
coming through, it might be getting read in as an attempt at a shell
variable.

If so, can you try escaping it as \$ instead?

Alternatively: '^(/dev|/tmp|/var)$'


HTH,
-jc