topic Re: inittab in Operating System - HP-UX

inittab

Joe Profaizer — Thu, 21 Sep 2000 15:13:53 GMT

We have an application that we want to ensure it is always running. We put an entry in /etc/inittab. We were informed that this was monitored by the init process and would restart processes that were terminated.
Below is our entry:
----------------------------
hrms::respawn:su - hradm -c "cd /opt/appserver/psfthrms/hrms751/appserv; ./psad
min -p start -d STL_HDEV"
----------------------------

Upon killing this process, the process didn't restart. Did we define the entry wrong or do we have to notify the init process that the inittab has changed? Must we reboot for every entry we put in the inittab?

Please consult.

..Joe

Re: inittab

John_16 — Thu, 21 Sep 2000 15:16:10 GMT

Do an "init q" and it will reread the inittab and the new changes will take effect.

Re: inittab

John Palmer — Thu, 21 Sep 2000 15:18:34 GMT

After changing inittab you need to inform init with the command 'init c'.

Also init will only respawn a process that it started in the first place. ie if you started your daemon manually and then killed it, init would not be aware.

Re: inittab

Robert Gamble — Thu, 21 Sep 2000 15:19:34 GMT

Joe,

I would recommend using a different method of keeping that 'aemon' alive.
Use a start script that not only starts your process, but a second process that checks to see if the 1st is still alive with logic included to restart it.

Good Luck

Re: inittab

John Palmer — Thu, 21 Sep 2000 15:20:54 GMT

Joe,

Sorry about the typo, I meant 'init q'

Re: inittab

John Palmer — Thu, 21 Sep 2000 15:27:23 GMT

Joe,

You should also consider defining a runlevel (second field of the inittab entry) the same as your default (second field of the first record). This will ensure that your daemon only gets started when the system gets to the normal runlevel after a boot.

Re: inittab

Vincente Fernandes — Thu, 21 Sep 2000 15:42:57 GMT

You need to define a runlevel(second field), this will make sure that your daemon will restart automatically) when the system comes up in normal runlevel. Do "who -r" will tell you the current level of system. Also you have to create a script in "/sbin/init.d/appscriptname" and linked to the appropriate "rc.?" directory if you want your application to come bootsup/shut down automatically when the server comes bootsup/down. To test it, change second field in inittab to the require runlevel, kill the application and it should come up automatically otherwise do "init q".

Re: inittab

Joe Profaizer — Thu, 21 Sep 2000 15:46:55 GMT

Thank you all!!!

Re: inittab

Joe Profaizer — Thu, 21 Sep 2000 15:47:00 GMT

Thank you all!!!