topic Re: Process IDs Reserved by System in Operating System - HP-UX

Process IDs Reserved by System

Sandeep L R — Wed, 09 Mar 2005 10:52:31 GMT

Hi All,

Can anyone help me out with answer for this question.

What process ids are generally reserved by Opearting system?

TIA

Sandeep

Re: Process IDs Reserved by System

John Poff — Wed, 09 Mar 2005 10:58:41 GMT

Hi,

The swapper process will get PID 0, and init will get PID 1.

JP

Re: Process IDs Reserved by System

Sandeep L R — Wed, 09 Mar 2005 11:01:58 GMT

Thanks!!

Is there any other restriction on other process ids like OS will reserve some process ids for its internal purpose. Does this mean applications can take any pid except 0 and 1, if its available?

Re: Process IDs Reserved by System

A. Clay Stephenson — Wed, 09 Mar 2005 11:02:28 GMT

When answering for generic UNIX, there are really only 2. PID 0 -- swapper; PID 1 --- init. Various flavors of UNIX have a few more.

One way to probe this for your particular case, is a simple ps -p N where N might range for 0 to 10.