topic Re: Script help needed in Operating System - HP-UX

Script help needed

Hunki — Thu, 28 Dec 2006 15:56:33 GMT

Attached is part of a case statement of a script that I have to use to boot up JBOSS on a system. The thing is I have three instances of JBOSS ( REST-A/B/C ) for starting all three instances in the case statement I have function called check_"instance-name" to see if the instance is already up .

But the problem is if the instance is already up then how to make it switch to the next checking of the instance and then the next one within the case statement so that it does not start duplicate instances.

thanks in anticipation,
hunki

Re: Script help needed

James R. Ferguson — Thu, 28 Dec 2006 16:10:20 GMT

Hi:

One way would be to have a 'while' loop that runs until a maximum count of running objects is tallied by the 'case'.

Regards!

...JRF...

Re: Script help needed

Hunki — Thu, 28 Dec 2006 16:12:59 GMT

I dont get it ... can u show me within the script on how to do it please.

thanks,

Re: Script help needed

Raj D. — Thu, 28 Dec 2006 16:31:34 GMT

Hunki,

Here is an example with the case statement.

#----------------------------------------
#!/bin/sh
# An example with the case statement
# Reads a command from the user and processes it
echo "Enter your command (who, list, or cal)"
read command
case "$command" in
who)
echo "Running who..."
who
;;
list)
echo "Running ls..."
ls
;;
cal)
echo "Running cal..."
cal
;;
*)
echo "Bad command, your choices are: who, list, or cal"
;;
esac
exit 0
#----------------------------------

Hope this will help,

Cheers,
Raj.

Re: Script help needed

Hunki — Thu, 28 Dec 2006 16:36:21 GMT

read my question raj ...

Re: Script help needed

Sandman! — Thu, 28 Dec 2006 16:50:12 GMT

How about extending your decision statement for example:

check_REST-A && echo "JBoss - REST-A already running!" ||
(
echo "Starting JBOSS-A";
su - gt -c "nohup /export/home/tmp/mc/jboss-4.0.4.GA/bin/run.sh -c REST-A";
echo "Server startup may take a while - "
)

~hope it helps

Re: Script help needed

James R. Ferguson — Thu, 28 Dec 2006 17:07:34 GMT

Hi (again):

Consider something like this:

# cat ./looper
#!/usr/bin/sh
typeset -l REPLY
typeset FLAG_A=0
typeset FLAG_B=0
typeset FLAG_C=0
while true
do
echo "please respond..."
read REPLY
case ${REPLY} in
"a" )
[ ${FLAG_A} = 1 ] && echo "already done" || FLAG_A=1
;;
"b" )
[ ${FLAG_B} = 1 ] && echo "already done" || FLAG_B=1
;;
"c" )
[ ${FLAG_C} = 1 ] && echo "already done" || FLAG_C=1
;;
esac

[ ${FLAG_A} = 1 -a ${FLAG_B} = 1 -a ${FLAG_C} = 1 ] && break
done
echo "done!"
exit 0

...When executed, this script will run forever until it receives an "a", "b" or "c" set of responses. Duplicate responses are ignored. Input can be upper or lower case.

In the absence of a blocking I/O like a 'read' in this script, add a 'sleep' to the loop so that you do not needlessly consume the CPU.

Regards!

...JRF...

Re: Script help needed

Raj D. — Thu, 28 Dec 2006 17:43:23 GMT

Sorry for not misunderstanding the question!

To check the next checking of the instance after the first check , hope you can use decission making and flow control with " if then else" loop , what do you think.

Cheers,
Raj.

Re: Script help needed

Raj D. — Thu, 28 Dec 2006 17:45:21 GMT

Pls eliminate "not" in my last post.

P.S: "0" point pls. Thx.

Re: Script help needed

SANTOSH S. MHASKAR — Fri, 29 Dec 2006 04:31:30 GMT

Hi,

Use for loop

eg.

for Instance in REST-A REST-b REST-C
do
check_${Instance} && echo "Already UP ${Instance}"
..
..
..
done

-Santosh

Re: Script help needed

Hunki — Fri, 29 Dec 2006 11:24:37 GMT

Thanks Sandman and thanks also to James, Raj , Santosh for replying.

Re: Script help needed

Raj D. — Fri, 29 Dec 2006 20:01:25 GMT

Btw, Hunki did you got any solution, and would you like to share as how this is resolved.

Thanks,
Raj.