Counting Processes

Shell Programming and Scripting
1

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:

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

,,,the problem is that the process is more than a single line. It looks like:

ps -ef | grep [d][w]
  genret 156098      1   0   Mar 19      - 167:25 /prod/jre_1.3.1/sh/java -Dprgi
d=DWManager -Xms1m -Xmx1024m -Djava.security.policy=/gers/genret/.java.policy -D
xml.catalog.files=/gers/catalog/catalog -cp /gers/genret/opt/path/gerscs.jar:/ge
rs/genret/opt/path/gersdw.jar:/gers/genret/jdbc/lib/classes12.zip:/gers/genret/m
enu/pub/sbin:/gers/genret/menu/pub/bin:/gers/genret/menu/pub/mac:/gers/genret/me
nu/adm/sbin:/gers/genret/menu/adm/bin:/gers/genret/menu/adm/mac:/gers/genret/men
u/sup/bin:/gers/genret/menu/sup/mac:/gers/genret/custom:/gers/genret/fix:/gers/g
enret/src_rev/fix:/gers/genret/opt/path:/gers/genret/bin:/g/bin:/usr/bin:/etc:/u
sr/sbin:/usr/ucb:/sbin -DVERBOSE=n com.gers.dw.DWManager
2

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.

3

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....

4

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

5

I comes back as "2"?

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