If condition in shell Script

Question

I have a shell script like this.

#!/bin/sh

s=$1      

pro=`ps -ef | grep $s | grep -v grep | grep -v test3.sh | wc -l`

 if [ $pro -eq 0 ] 
    then
            echo "Service $s is DOWN..."
            echo "Service $s is DOWN..." >> processlogs.txt
            echo "Starting Service $s..."
            echo "Starting Service $s..." >> processlogs.txt
            java -jar clientApplication.jar $s &

 else
            echo "Service $s is Running..."
            echo "Service $s is Running..." >> processlogs.txt

 fi

When I execute the shell script, and the operation enters in the if condition it never come back. It continuously executes the command "java -jar clientApplication.jar $s". But there is no problem in else condition. Is my syntax wrong or any logical error.

Thanks ...

$pro will always be at least 1 since you are setting 's' to $1 and $1 should show up in ps -ef | grep $s — Red Cricket
– Red Cricket, Commented Feb 13, 2013 at 5:39

Red Cricket · Accepted Answer · 2013-02-13 05:47:34Z

1

You should try this ...

(java -jar clientApplication.jar $s &)

... instead of ...

java -jar clientApplication.jar $s &

and if that does work take a look at nohup

answered Feb 13, 2013 at 5:47

Red Cricket

10.6k24 gold badges96 silver badges193 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

Suniel Over a year ago

Thanks Red Cricket but both doesnot work. It works in VMware in ip 100.100.100.186 but it doesnot work in ip 100.100.100.7 . Can ip be the factor for it.

Red Cricket Over a year ago

I guess that depend more on what clientApplication.jar does. If it is your code I would suggest daemonizing it so that you wouldn't have to worry about back-grounding with a shell script.

Suniel Over a year ago

clientApplication just takes arguments and print continuously.

Red Cricket Over a year ago

then IP address shouldn't matter. So why does this java program need IP address to just print continuously?

Suniel Over a year ago

program dont need ip. Previously I was testing in VMware and now I am testing in different computer having linux environment.

Collectives™ on Stack Overflow

If condition in shell Script

1 Answer 1

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related