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Help with simple script to find PID of process

 
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Top Forums UNIX for Dummies Questions & Answers Help with simple script to find PID of process
# 8  
Old 11-05-2012
OR..

Code:
if [[ ! $(jps -l | grep cq) ]]

# 9  
Old 11-05-2012
Quote:
Originally Posted by thirdcoaster
Code:
. . . 
if [ 'jps -l | grep cq | wc -l' -eq 0 ]
then
        echo "Process is not running"
else
        echo "Process is running"
fi

Not sure how far your SUN OS / shell supports this, but you might want to try
Code:
 jps -l | grep [c]q && echo "proc running" || echo "proc not running"

grep will leave an exit code: 0 if found, 1 if not found. && will execute the next statement, or even list, if found; || will do if not found. The [c] makes grep not find itself; and you may want to be way more specific in the process pattern that you grep for.
This User Gave Thanks to RudiC For This Post:
thirdcoaster
# 10  
Old 11-05-2012
Unfortunately that didn't work either. I made the suggested change and get the following:

Code:
root@quartz>/var/opt/OV/bin/instrumentation> ./cq_mon.sh cq_mon
invalid argument count
usage: jps [-help]
       jps [-q] [-mlvV] [<hostid>]

Definitions:
    <hostid>:      <hostname>[:<port>]
./cq_mon.sh[57]: jps:  not found
Process is not running

My concern here is that the process is in fact running...previously it would at least echo the right message. My question is now whether something is wrong with that last 'if' line:

Code:
if [ `jps -l | grep cq | wc -l` -eq 0 ]

is being run from the right dir, since the error indicates that jps is not found. Smilie

---------- Post updated at 03:22 PM ---------- Previous update was at 03:10 PM ----------

Quote:
Originally Posted by RudiC
Not sure how far your SUN OS / shell supports this, but you might want to try
Code:
 jps -l | grep [c]q && echo "proc running" || echo "proc not running"

grep will leave an exit code: 0 if found, 1 if not found. && will execute the next statement, or even list, if found; || will do if not found. The [c] makes grep not find itself; and you may want to be way more specific in the process pattern that you grep for.
I appreciate you explaining what each piece does, THANK YOU! I am bumping up against the same problem though, the command jps isn't being found. Somehow I think I need to pass the location of jps from the first part of the script into the bottom.

Code:
root@server>/var/opt/OV/bin/instrumentation> ./cq_mon.sh cq_mon
invalid argument count
usage: jps [-help]
       jps [-q] [-mlvV] [<hostid>]

Definitions:
    <hostid>:      <hostname>[:<port>]
./cq_mon.sh[57]: jps:  not found
proc not running

Last edited by thirdcoaster; 11-05-2012 at 04:11 PM.. Reason: missed a bracket
# 11  
Old 11-05-2012
Can you re-try using the absolute path of jps in your if statement?
# 12  
Old 11-05-2012
Quote:
Originally Posted by bipinajith
Can you re-try using the absolute path of jps in your if statement?
Yes. I did that and got a better result - the pid is returned and the correct message comes through: proc running. However, there is still an invalid argument error, and I am still stuck with the problem that this script is to be run on three different systems, two of which have a different absolute path for jps. Result follows:

Code:
root@server>/var/opt/OV/bin/instrumentation> ./cq_mon.sh cq_mon
invalid argument count
usage: jps [-help]
       jps [-q] [-mlvV] [<hostid>]

Definitions:
    <hostid>:      <hostname>[:<port>]
350 cq5-author-4502.jar
proc running

# 13  
Old 11-06-2012
Quote:
Originally Posted by thirdcoaster
Code:
root@quartz>/var/opt/OV/bin/instrumentation> ./cq_mon.sh cq_mon
invalid argument count
usage: jps [-help]
       jps [-q] [-mlvV] [<hostid>]

Definitions:
    <hostid>:      <hostname>[:<port>]

Are you sure you want to run jps? From that errror msg I infer it does not report process states etc. but info about remote hosts. Why don't you use ps?
# 14  
Old 11-06-2012
It is a requirement of my business partner that I use jps. jps will return the information I need, which is basically, is there a cq process running or not. I have confirmed this many times.

The only outstanding issue is that I'm still getting the error, which I believe is because in the last call of jps the directory isn't getting passed correctly. That's what I need help with.

Thanks.
 
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