nv-l

RE: [nv-l] Formatting trap variables like "$+1"

2002-03-12 11:20:17
Subject: RE: [nv-l] Formatting trap variables like "$+1"
From: "James Shanks" <jshanks AT us.ibm DOT com>
To: "Treptow, Craig" <Treptow.Craig AT principal DOT com>
Date: Tue, 12 Mar 2002 11:20:17 -0500
Ah, Now I see.  Sorry, Craig.

I re-read the original post and reminded myself of the issue.
The problem here is that what gets passed to nvcorrd is just the contents 
of the trap.  The content of the first variable is just the integer 6, and 
there is nothing you can do to change that, except to issue your own trap 
with more in it.   What you want to reference is not the content itself, 
but the "box" that the variable content came in, as I called it in the 
earlier post.  But nvcorrd doesn't have access to that.  So you cannot do 
what you want to do in a ruleset action.

Who has access to the incoming box?  trapd.  Who can he give it to besides 
himself?  ovactiond.  ovactiond does not use the encoded trap structure 
that nvcorrd and all the other daemons do.  If you want him to get 
something you have to pass it.  So your only choice is to have him execute 
your script, or some variant of it.   To do that you add the command as a 
"Command for Automatic Action" to trapd.conf using xnmtrap.

This, for example, should work,
        <full_path>.myscript  "$+1" "$+2" "$+3" "$+4" "$+5" "$+6" "$+7" 
"$+8"

and in the script you have
        echo "$1" >> $LOGFILE
and so on.

That is essentailly what I did.


James Shanks
Level 3 Support  for Tivoli NetView for UNIX and NT
Tivoli Software / IBM Software Group
 





"Treptow, Craig" <Treptow.Craig AT principal DOT com>
03/12/2002 10:30 AM

 
        To:     nv-l AT lists.tivoli DOT com
        cc:     James Shanks/Raleigh/IBM@IBMUS
        Subject:        RE: [nv-l] Formatting trap variables like "$+1"

 

Hmmm...

I'm doing this right now in the script:

echo "NVA=[$NVA]" > $LOGFILE
echo "NVATTR_1=[$NVATTR_1]" >> $LOGFILE
echo "NVATTR_2=[$NVATTR_2]" >> $LOGFILE
echo "NVATTR_3=[$NVATTR_3]" >> $LOGFILE
echo "NVATTR_4=[$NVATTR_4]" >> $LOGFILE

The NVATTR_1, just gets me '6', not 
'cHsrpGrpEntry.cHsrpGrpStandbyState.8.0 6'.

So, I think I'm still missing something, or doing something wrong.

Thanks for your help!!

Craig

-----Original Message-----
From: James Shanks [mailto:jshanks AT us.ibm DOT com]
Sent: Tuesday, March 12, 2002 9:25 AM
To: Treptow, Craig
Cc: nv-l AT lists.tivoli DOT com
Subject: Re: [nv-l] Formatting trap variables like "$+1"


Craig -
Are you passing the NVATTR variables to your script, or just referencing 
them?
To pass them you must enclose them in quotation marks, because otherwise 
the shell will stop as the first space when it instantiates the variable.
For example, to pass your variables you'd need to say
   <full_path>myscript  "NVATTR_1"  "NVATTR_2"  "NVATTR_3" 
and so on.
But because these are exported  you can just use them in your script. 
If you are going to echo them to file, then you could just say
        echo "var1 = " NVATTR_1  >>  myfile
right in the script.

James Shanks
Level 3 Support  for Tivoli NetView for UNIX and NT
Tivoli Software / IBM Software Group
 





"Treptow, Craig" <Treptow.Craig AT principal DOT com>
03/12/2002 10:06 AM

 
        To:     "NetView List (E-mail)" <nv-l AT lists.tivoli DOT com>
        cc: 
        Subject:        [nv-l] Formatting trap variables like "$+1"

 

I am having trouble implementing James Shanks' solution to Karin Binder's 
problem back in February and am hoping somebody can help me.

This is the question I'm referring to:

http://www.vk.net/tivoli/Netview-List.nsf/4a25624e007bfc5c85255a850068ca27/5bf179679b67e533ca256b6600544312!OpenDocument
 

Basically, James suggested using the "$+1" formatting of a trap variable.

It seems straightforward, but I think I am missing something.

I have a similar situation with Cisco HSRP state change traps.
I can format the variable in the trap by doing the "$+1", and in the 
events display I do get:
"cHsrpGrpEntry.cHsrpGrpStandbyState.8.0 6", but when I look at the 
"NVATTR_*" variables passed to my script in an action node all I have is:
NVA=[offline-dist-1-l3.net.principal.com]
NVATTR_1=[6]
NVATTR_2=[3]
NVATTR_3=[A]
NVATTR_4=[4]

What am I missing to make this work?  I'm trying to use the "8.0" to 
eventually do some SNMP gets and figure out which interface had the HSRP 
state change.

Thanks for any help.

Craig

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