Counting Processes

heprox · #1 (**permalink**) 03-21-2007

I have a simple script that I want to notify me whenever there are anything other than one instance of a particular process running. I've always used the script:

Code:

DPID_DW=$(ps -ef | grep [d][w] | wc -l)
if [ "${DPID_DW}" -eq 0 ]
   then
        echo "The data warehouse manager for DB is down"
elif [ "${DPID_DW}" -gt 1 ]
  then
        echo "More than one instance of the DW Manager is running"
fi

blowtorch · #2 (**permalink**) 03-21-2007

Er, you should confirm that. The output is spread across multiple lines on screen, but if you check with wc -l or grep -c, you will find that it is on a single line.

heprox · #3 (**permalink**) 03-21-2007

I thought the same thing, but I always get "echo "More than one instance of the DW Manager is running" message? Indicating that it is counting more than one line....

blowtorch · #4 (**permalink**) 03-21-2007

Can you actually do an echo of DPID_DW and check the value stored there?

heprox · #5 (**permalink**) 03-21-2007

I comes back as "2"?

Code:

x-4-1-user# dw_test
       2
x-4-1-user#

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