Nagios Support Forum

Hi,

I'm getting below error in the plugin check.

[/usr/local/nagios/libexec/check_rdpusers.sh: line 5: [: : integer expression expected
/usr/local/nagios/libexec/check_rdpusers.sh: line 11: [: : integer expression expected
/usr/local/nagios/libexec/check_rdpusers.sh: line 15: [: : integer expression expected]

But when i manually do a run check command, it works fine.
Can you please assist me here?

# cat /usr/local/nagios/libexec/check_rdpusers.sh
#!/bin/bash

result=`/usr/local/nagios/libexec/check_nrpe -H $1 -t 60 -c "check_get_rdp_info"| grep Active | awk {'print $5'} | cut -b 11-20`

if [ "$result" -ge $2 ] ; then
if [ "$result" -lt $3 ] ; then
echo "WARNING - Remote users logged in is "$result""
exit 1
fi
fi
if [ "$result" -ge $3 ] ; then
echo "CRITICAL - Remote users logged in is "$result""
exit 2
fi
if [ "$result" -lt $2 ] ; then
echo "OK - Remote users logged in is "$result""
exit 0
fi

FYI..

Line 5 : if [ "$result" -ge $2 ]; then
Line 11: if [ "$result" -ge $3 ]; then
Line 15: if [ "$result" -lt $2 ]; then

PFA screenshot, the same check runs fine with the other hosts, not sure why it gives this error for other hosts. When i run a check command manually on those servers it works fine.

Hello, @bosecorp. You said the check command works, right? Can you run:
/usr/local/nagios/libexec/check_nrpe -H $1 -t 60 -c "check_get_rdp_info"| grep Active | awk {'print $5'} | cut -b 11-20
And demonstrate us the output.
Thanks.

# /usr/local/nagios/libexec/check_nrpe -H usmacssrdsh12.bose.com $1 -t 60 -c "check_get_rdp_info"| grep Active | awk {'print $5'} | cut -b 11-20
17

@ bosecorp, I think whatever result nrpe returns is a string. You may need to convert the "result" to an integer before passing it forward to the IF functions. Also, printing out the output of the $result inside the plugin may be useful during the troubleshooting process.

i tried declaring the variable as interger

declare -i result

But it didnt worked. Not sure why the nagios check is throwing up that error. The scirpt when we run manually works fine.

# bash -x check_rdpusers.sh xxx.bose.com 25 30
+ declare -i result
++ /usr/local/nagios/libexec/check_nrpe -H xxx.bose.com -t 60 -c check_get_rdp_info
++ grep Active
++ awk '{print $5}'
++ cut -b 11-20
+ result=15
+ '[' 15 -ge 25 ']'
+ '[' 15 -ge 30 ']'
+ '[' 15 -lt 25 ']'
+ echo 'OK - Remote users logged in is 15'
OK - Remote users logged in is 15
+ exit 0

@bosecorp, Can you run the following commands on your plugin to make sure it has the right permissions?

I do not see any issues with the permission.
# ls -l check_rdpusers.sh
-rwxrwxr-x 1 apache nagios 518 Dec 12 15:10 check_rdpusers.sh

Please see the attachment in my previous comments, there you can clearly see that it works from most of the servers, but fails on some.

The script works fine when you run it manually as a root user. Does it also work, when you run it as nagios user?

What is the OS/architecture of the "failing" servers, and the version of bash that is installed on them? Is nagios added to sudoers?