2.11.3 Sample script

Assume that you are responsible for managing the printers on your network. Your goal is to write a script that executes the snmptrap command when the printer scheduler goes down. Here is an example script.

#! /bin/sh
#
#
# This script checks to see if the printer scheduler
# (lpshed) is running. This check is performed every
# hour. If the scheduler is not running, the agent
# sends an SNMP trap to the management station.
 
#
# If a management station receives a trap from a system with 
# enterprise equal to .1.3.6.1.4.1.4242, generic-trap equal 
# to 6, and the specific trap equal to 2, the management station 
# knows that the printer scheduler for that agent-addr is down.
 
# The agent sends how many hours the lp scheduler has been 
# down with the trap.
#
 
AGENT_ADDRESS=15.6.71.223
 
MGMT_STATION=flcndmak
 
hours=0
while true
do
    sleep 3600
    pid='ps -ef | grep lpsched | grep -v grep |wc -l'
    if [$pid -eq 0]
    then
        hours='expr $hours + 1'
        snmptrap -cpublic $MGMT_STATION .1.3.6.1.4.1.4242 
        $AGENT_ADDRESS 6 2 0 \
               .1.3.6.1.4.1.4242.4.2.0 Integer $hours
    else
        hours=0
    fi
done

Important note

In AIX, if the snmptrap or systemtrap command is executed as an extension of a shell script or program started from cron or /etc/inittab, the command might fail with the following message:

snmptrap:cannot set locale($LANG="Ja_JP")

If this message is output, in the LC_ALL environment variable, set the language you want to use.

The following shows an example of setting C as the language code for the B shell.

LC_ALL=C
export LC_ALL
snmptrap flcndmak .1.3.6.1.4.1.4242 15.6.71.223 6 2 0

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