[Nagiosplug-help] Avoiding tmp-files for SNMP-check

[Ralph.Grothe at itdz-berlin.de]

If it's a deep snmpwalk I would avoid the push on @result
but do the parsing already in the while loop over the open pipe.

> -----Original Message-----
> From: nagiosplug-help-bounces at lists.sourceforge.net
> [mailto:nagiosplug-help-bounces at lists.sourceforge.net]On Behalf
Of
> Andreas Baetz
> Sent: Friday, November 10, 2006 7:22 AM
> To: nagiosplug-help at lists.sourceforge.net
> Subject: Re: [Nagiosplug-help] Avoiding tmp-files for
SNMP-check
> 
> 
> On Thursday 09 November 2006 20:33, Ingo Lantschner wrote:
> > Hello,
> > I wrote a plugin to check the fanstatus in FuSi Servers. 
> The complete  
> > script is attached at the end of this email.
> > 
> > The plugin works, but what I dont like so much ist this part:
> > OUTPUT=/tmp/$1-fancheck.tmp
> > snmpwalk -mAll -v1 -c $2 $1 
> 1.3.6.1.4.1.231.2.10.2.2.5.2.2.1 > $OUTPUT
> > 
> > Using  tempfile is not recommended according to the
guidelines for  
> > nagiosplugins. But how can I store a "multiline-variable" 
> and "grep"  
> > single lines of it later on?
> > 
> > For the moment I do it like this:
> > FANSPRESENT=$(grep fanStatus $OUTPUT | grep -v unknown | \
> > 	cut -d " " -f1 | cut -d \. -f2-3)
> >          for FID in $FANSPRESENT; do
> >              FNAME=$(cat $OUTPUT | grep fans.16.$FID | cut
-d: -f4)
> > 	    ...
> > 
> > May be some of you already came over this prblem - thanks for
any  
> > hint! Ingo.
> 
> You could use perl like that:
> 
> --------------------------------------------------------------
> -----------------
> /usr/bin/perl -w
> my cmd="/path/command";
> my @result; # holds the output of your command
> open IN, "$command |" or die "Can't run $command: $!";
> while (<IN>) {
>  # $_ holds the lines of output of the command
>  # remove CR/LF
>  chomp;
>  push (@result, $_);
> }
> 
> # do something with the output:
> foreach (@result) { 
>  # $_ holds the lines of output of the command
>  if (/searchstring/i) {
>   # etc, etc
>  }
> }
> --------------------------------------------------------------
> -----------------
> 
> Andreas
> 
> 
>
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