Korn Shell

Shell Programming and Scripting
1

Hi I am new to shell programming. I need help to write a script to monitor a process on Sun OS. If the process fails then call a oracle procedure.

i check the process if running by typing

ps -ef | grep ESP | grep -v grep
    root 29002     1  0   Mar 18 ?        7:20 /u01p/system/ESPSystemAgent/cybAgent

thanks

2 
#!/bin/ksh

if (( $(ps -ef | grep -c [E]SP) > 0 )) ; then
   echo 'ESP is running'
else
   echo 'ESP is NOT running'
fi
3

How would keep this job running all the time. will the job end if the grep process is not found

or i can i run it in the backround and leave the process on machine?

4

the script will exit either way. This was intended as a hint at the implementation - not a complete solution.

If you want to keep cheking for the job/process, you'll either:

  1. 'cron' [man crontab] the script to be ran at predefined times
  2. write the infinite look around the 'if' with the 'sleep #Seconds' to suspend the exucution for a '# of Seconds'
5

thanks for the help