Shell Programming and Scripting

Hi all,
I am very new to shell scripting.I have the requirement like
one program is there, if it is running leave like that only and if it is stopped it has to be restart and once again keep watching and it is stopped we a have to restart once agian.I want a shell script for this.Please help me in this.

This is an urgent one.Thanks in advance.

Hello,

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Code:

while [ 1 ]
do
   #run your process in background 
   process argument &
   wait $!
   sleep 1
echo 'Restarting'
done

Its working .Thank you very much for ur valuable reply.
Regards,
Vijay

---------- Post updated at 08:07 AM ---------- Previous update was at 08:05 AM ----------


Hi,
Slight modification in my requirement, I want in the code that if the process is killed or aborted when the process is running, It should restart at that time also.
The signals are as below:

switch(signum){
case SIGHUP: return "JVM hangup";
break;
case SIGINT: return "JVM interrupted";
break;
case SIGQUIT: return "JVM Quit";
break;
case SIGILL: return "Illegal instruction";
break;
case SIGABRT: return "JVM aborted";
break;
case SIGFPE: return "Floating point exception";
break;
case SIGKILL: return "JVM killed";
break;
case SIGBUS: return "Bus error";
break;
case SIGSEGV: return "Segmentation violation";
break;
case SIGSYS: return "Bad argument to system call";
break;
case SIGTERM: return "Software termination signal from kill";
break;
case SIGCHLD: return "Child process terminated or stopped";
break;
default: return "JVM abnormally terminated";
break;
}
I dont know how to trap these signals in the script.
Please let me solve in this issue.

Thanks in advance.
Vijay,

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The UNIX and Linux Forums

Did you test jonbach script ? No. How I Know it ? Your message is answer. Test first the solution and then ask more, if solution not work or ...

---------- Post updated at 06:20 PM ---------- Previous update was at 04:20 PM ----------

Look trap/signal

---------- Post updated 05-08-09 at 01:42 PM ---------- Previous update was 04-08-09 at 06:20 PM ----------

I got Infractions from this answer. I can't still understand why ?
If we give solution and thread maker not test it, why we give answer ?

Makers first answer was
"Slight modification in my requirement, I want in the code that if the process is killed or aborted when the process is running, It should restart at that time also."

1st solution do it. Later added signal list give more info - then the 1st solution is not anymore answer even it's better - it can handle subprocess in every case, but if you try to restart yourself, you can handle only some interrupts.

If you want others to follow rules, then you should follow rules yourself, right?

First of all, the forum rules are clear on the requirement to post descriptive subject text.

Your original subject text was clearly a rule violation, but our moderators did not give you an infraction for that. They were kind to you.

Then, you are unhappy when someone offers an untested suggestion. Why? Are you paying for the service here? What gives you any right to demand answers from others here in the way you want?

Perhaps English is not your native language. That is OK. However, the rules apply to all, regardless of language.

I hope my reply is clear.

You are welcome to post here, but you should follow the rules. Thanks.