Shell Programming and Scripting

Hi All,
I want to run 5 `ps -ef | grep [process]` cmds in one script and i want the script to give me return code 0 if everything is OK. If it notices one of the processes is not there, it will prompt me the process name and advice me to check it.

I've wrote a script that separates the output but I want to combine it into one output.

echo "\n***------------------------------***"
echo "\nNo. 8"
echo "To check WAS-server1 process.."
varB=`ps -ef | grep server1`
if [ $? -eq 0 ]
then
echo "OK, WAS-server1 process is up."
else
echo "==>NOT OK; WAS-server1 PROCESS IS DOWN, please check!!"
fi
sleep 3

echo "\n***------------------------------***"
echo "\nNo. 9"
echo "To check tws process.."
varC=`ps -ef | grep tws`
if [ $? -eq 0 ]
then
echo "OK, tws processes are up."
else
echo "==>NOT OK; tws PROCESS IS DOWN, please check!!"
fi
sleep 3

And the output is;
No. 8
To check WAS-server1 process..
OK, WAS-server1 process is up.

***------------------------------***

No. 9
To check tws process..
OK, tws processes are up.

I want the output to be like this;
(If all processes are up)
Checking all processes..
Return code : 0
All processes are up, OK.

(If one of the processes in not up)
Checking all processes..
WAS-server1 is UP, OK.
==> TWS is not UP, PLEASE CHECK!!


Please help, thank you.

Your first problem is that

Code:

ps -ef|grep whatever

will always be successful resulting in $? being always 0, because of your grep process itself. You could try grep -C process name if you know the actual command for the process you are looking for.

As for the output, you could collect the names of all the processes in two lists, e.g.
something along the lines of

Code:

ps -C $process > /dev/null
if[ $? -eq 0 ]
then 
  procs_up="$procs_up $process"
else
  procs_down="$procs_down $process"
fi

if [ ${#procs_down} -eq 0 ]
then
  echo All processes are up, OK.
else
  for p in $procs_up
  do
     echo "$p is up. OK"
  done
  for p in $procs_down
  do
     echo "$p is not up. please check"
  done
 fi

You could also usefully put the process checking bit into a function.

spirtle,

I tried with single process first;
root@axdevt01::/tmp/fara/script> cat grep2.sh
#process=df
process=server1
ps -ef | grep $process | grep -v grep > /dev/null
if [ $? -eq 0 ]
then
procs_up="$procs_up $process"
else
procs_down="$procs_down $process"
fi

if [ ${procs_down} -eq 0 ]
then
echo All processes are up, OK.
else
for p in $procs_up
do
echo "$p is up. OK"
done
for p in $procs_down
do
echo "$p is not up. please check"
done
fi

And this is the output;
root@axdevt01::/tmp/fara/script> grep2.sh
grep2.sh[12]: test: argument expected
server1 is up. OK

Then I tried df (not server1, df is not up), and this is the output;
root@axdevt01::/tmp/fara/script> grep2.sh
grep2.sh[12]: df: bad number
df is not up. please check


Any advise?