[Nagiosplug-help] Questions using negate?
Voon, Ton
Ton.Voon at egg.com
Tue Mar 18 05:53:16 CET 2003
Managed to have a play at cfpopen and here are the results:
A) RIGHT
$ ./negate /usr/bin/grep Network /etc/services
# Network services, Internet style
nntp 119/tcp usenet # Network News Transfer
ntp 123/tcp # Network Time Protocol
ntp 123/udp # Network Time Protocol
B) WRONG (the " are lost)
$ ./negate /usr/bin/grep "Network Time" /etc/services
grep: can't open Time
/etc/services:# Network services, Internet style
/etc/services:nntp 119/tcp usenet # Network
News Transfer
/etc/services:ntp 123/tcp # Network
Time Protocol
/etc/services:ntp 123/udp # Network
Time Protocol
C) WRONG (same as above)
$ ./negate /usr/bin/grep 'Network Time' /etc/services
grep: can't open Time
/etc/services:# Network services, Internet style
/etc/services:nntp 119/tcp usenet # Network
News Transfer
/etc/services:ntp 123/tcp # Network
Time Protocol
/etc/services:ntp 123/udp # Network
Time Protocol
D) RIGHT
$ ./negate '/usr/bin/grep "Network Time" /etc/services'
ntp 123/tcp # Network Time Protocol
ntp 123/udp # Network Time Protocol
E) RIGHT
$ ./negate "/usr/bin/grep 'Network Time' /etc/services"
ntp 123/tcp # Network Time Protocol
ntp 123/udp # Network Time Protocol
The only benefit is case D. Is it worth a switch over? Maybe the only change
is to provide better instructions on using case E and a better error message
if double quotes exist.
Any comments?
Ton
> -----Original Message-----
> From: Voon, Ton [SMTP:Ton.Voon at egg.com]
> Sent: Tuesday, March 18, 2003 12:31 PM
> To: 'Subhendu Ghosh'; Nagiosplug-help at lists.sourceforge.net
> Subject: RE: [Nagiosplug-help] Questions using negate?
>
> I think there is a problem in spopen which affects negate and other
> plugins
> where external command calls with double quotes do not work correctly.
>
> RIGHT (no spaces in command)
> $ negate /usr/bin/grep Network /etc/services
> # Network services, Internet style
> nntp 119/tcp usenet # Network News Transfer
> ntp 123/tcp # Network Time Protocol
>
> WRONG (spaces lost when passed to spopen - I think it is running a grep
> against a file called Time, then /etc/services)
> $ negate /usr/bin/grep "Network Time" /etc/services
> /etc/services:# Network services, Internet style
> /etc/services:nntp 119/tcp usenet # Network
> News Transfer
> /etc/services:ntp 123/tcp # Network
> Time Protocol
>
> WRONG (same as above)
> $ negate /usr/bin/grep 'Network Time' /etc/services
> /etc/services:# Network services, Internet style
> /etc/services:nntp 119/tcp usenet # Network
> News Transfer
> /etc/services:ntp 123/tcp # Network
> Time Protocol
>
> WRONG (spopen returns NULL if " found in the command line)
> $ negate '/usr/bin/grep "Network Time" /etc/services'
> Could not open pipe: /usr/bin/grep "Network Time" /etc/services
>
> RIGHT (spopen doesn't mind ' and the shell has kept the spaces in between)
> $ negate "/usr/bin/grep 'Network Time' /etc/services"
> ntp 123/tcp # Network Time Protocol
>
> I'll look into using cfpopen (http://www.cfengine.org) to see if that will
> help, but it will take me ages!
>
> Ton
>
> > -----Original Message-----
> > From: Subhendu Ghosh [SMTP:sghosh at sghosh.org]
> > Sent: Tuesday, March 18, 2003 3:11 AM
> > To: Nagiosplug-help at lists.sourceforge.net
> > Subject: RE: [Nagiosplug-help] Questions using negate?
> >
> > I thinks you need backslash to escape not forward slash...
> >
> > -s \"word1 word2\"
> >
> > -sg
> >
> > On Tue, 18 Mar 2003, Rick . wrote:
> >
> > > Thanks Subhendu,
> > >
> > > The plugin works a lot better. My only problem now is that i need to
> use
> > the
> > > -s command to check for a string of text using check_http. The string
> > needs
> > > to be two words.
> > > When i put the two words in the quotes "word1 word2" with check_http
> > only,
> > > the command works fine. But as soon as i negate the check_http
> command,
> > it
> > > doesn't work with more than one word in the string.
> > > I have tried -s /"word1 word2/" etc but unfortunately it isn't
> working.
> > >
> > > Is there any way to do this?
> > >
> > > Thanks alot!
> > >
> > > Rick :)
> > >
> > >
> > >
> > >
> > >
> > > >From: Subhendu Ghosh <sghosh at sghosh.org>
> > > >To: Nagiosplug-help at lists.sourceforge.net
> > > >Subject: RE: [Nagiosplug-help] Questions using negate?
> > > >Date: Fri, 14 Mar 2003 19:10:05 -0500 (EST)
> > > >
> > > >
> > > >There was a recent patch applied on negate - you might want to grab
> the
> > > >latest version of negate from CVS...
> > > >
> > > >-sg
> > > >
> > > >On Thu, 6 Mar 2003, Rick . wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > > I downloaded and tested this plugin, and i am having the same
> > problem.
> > > > >
> > > > > The plugin is always giving an OK, whether the negated plugin is
> OK
> > or
> > > > > CRITICAL.
> > > > >
> > > > > Does anybody know how to fix this?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Rick.
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > >From: Rose David <DRose at snyderdrug.com>
> > > > > >To: Nagiosplug-help at lists.sourceforge.net
> > > > > >Subject: RE: [Nagiosplug-help] Questions using negate?
> > > > > >Date: Wed, 5 Mar 2003 11:38:13 -0600
> > > > > >
> > > > > >Thank you for your response and input. I have now used your
> script
> > and
> > > >it
> > > > > >has gotten me farther along than I have been able to this point.
> > Here
> > > >is
> > > > > >the catch. When I run this on the command line, it works just as
> > > > > >advertised, switching the return codes from 2 to 0 or from 0 to
> 2.
> > > > > >However,
> > > > > >when I run it in nagios as a command, either a Critical or an OK
> > state
> > > >on
> > > > > >the check_ping shows up as OK. Using the same command, I get the
>
> > > >following
> > > > > >two results:
> > > > > >
> > > > > >Status Status Information
> > > > > >OK CRITICAL - Plugin timed out after 10 seconds
> > > > > >OK PING OK - Packet loss = 20%, RTA = 245.95 ms
> > > > > >
> > > > > >Any further input as to what I might do to get this to work?
> > > > > >
> > > > > >
> > > > > >
> > > > > > > We re-wrote negate as a simple perl script. I have tried your
> > > > > > > check_ping input with my version of negate and here is what I
> > get:
> > > > > > >
> > > > > > >
> > > > > > > root at lxxxx:[/home/nagios/etc]: /home/nagios/libexec/new-negate
> > > > > > > /home/nagios/libexec/check_ping -H auspap01 -w 1000.0,100% -c
> > > > > > > 1000.0,100% -p 5
> > > > > > > Command is: /home/nagios/libexec/check_ping -H host01 -w
> > > > > > > 1000.0,100% -c
> > > > > > > 1000.0,100% -p 5PING OK - Packet loss = 0%, RTA = 4.62 ms
> > > > > > > Return code is 0
> > > > > > > root at lapin:[/home/nagios/etc]: echo $?
> > > > > > > 2
> > > > > > >
> > > > > > > The first return code is the actual return from the check_ping
>
> > > >plugin,
> > > > > > > the second $? output is the negated output. Since check_ping
> > > >produces
> > > > > > > multiple return codes depending on the result, it is
> > > > > > > difficult to use a
> > > > > > > generic negate plugin. I have included our version of the
> > plugin
> > > > > > > "new-negate. Hope this helps..
> > > > > > >
> > > > > > > Good luck
> > > > > > >
> > > > > > >
> > > > > > > John Cockerham
> > > > > > > Sr. Network Administrator
> > > > >
> > > > >
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