ping plugin - no output

[James Green]

Hi

Due to one of my machines bizarrely giving weird error messages at random:

jmkg at m1:/etc/nagios$ ping xxx.xxx.xxx.xxx
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx) from xxx.xxx.xxx.xxx : 56(84) 
bytes of data.
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=1 ttl=254 time=0.412 ms
WARNING: failed to install socket filter
: Protocol not available
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=2 ttl=254 time=0.258 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=3 ttl=254 time=0.314 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=4 ttl=254 time=0.370 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=5 ttl=254 time=0.301 ms

--- xxx.xxx.xxx.xxx ping statistics ---
5 packets transmitted, 5 received, 0% loss, time 4047ms
rtt min/avg/max/mdev = 0.258/0.331/0.412/0.054 ms

I built a simple wrapper script, thus:

#!/bin/bash

output=`$1|tail -1`
echo $output

Which works rather well at the command line:

jmkg at m1:/etc/nagios$ /opt/nagios/libexec/check_ping_stealthnet 
'/opt/nagios/libexec/check_ping -H xxx.xxx.xxx.xxx  -w 10,10% -c 20,20% 
-p 10'
Packet loss = 0%, RTA = 0.34 ms

And within the checkcommands.cfg:

define command {
        command_name            check_ping_int
        command_line            
/opt/nagios/libexec/check_ping_stealthnet 
'/opt/nagios/libexec/check_ping -H $ARG3$  -w $ARG1$ -c $ARG2 -p 10'
        }

Yet within nagios it reports a critical situation, with "No output!" as 
the result.

I have no idea why. Can anyone offer some advice please?

Many thanks!

-- 
James Green
Systems Administrator, StealthNET Ltd, www.stealthnet.co.uk
Tel: 0870 800 1777 Intl: +44 1493 660066 Fax: 0870 135 1069



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