first process in hpux

[Shivkumar]

Hi,

In HPUX 11.11i or 11.23 which is the first process which spawns other processes ?

If i remember correctly in Sun Solaris it was scheduler process with pid 0.

Just curious how hpux spawns the process world.

Thanks,
Shiv

[Rajeev Shukla]

Hi Shiv,

In HPUX it is the init process which starts the other processes.
You can run ps -ef|more and see all the system daemons start with a PPID of 1 which is the PID of init process

Cheers
Rajeev

[Arunvijai_4 · Accepted solution]

Hi Shiv,

"swapper" is the process,

# ps -ef

UID PID PPID C STIME TTY TIME COMMAND
root 0 0 0 Jun 9 ? 6:10 swapper
root 1 0 0 Jun 9 ? 0:01 init

-Arun

[Rajeev Shukla]

If you are talking about the first process then yes it is swapper.
But if you are asking which process spawns other process in the system then it is init.
Have a look at the man pages of init, the first line explains
"The init daemon and command is a general process spawner"

Cheers
Rajeev

[inventsekar_1]

hi Shivkumar,

The init daemon and command is a general process spawner. Its primary role is to create processes from a script stored in the file /etc/inittab.

ps -ef|more
UID PID PPID C STIME TTY TIME COMMAND
root 0 0 0 Jul 15 ? 0:17 swapper
root 1 0 0 Jul 15 ? 0:00 init
root 8 0 0 Jul 15 ? 0:00 ioconfigd
root 9 0 0 Jul 15 ? 0:25 nfsktcpd
root 10 0 0 Jul 15 ? 0:00 autofskd
root 11 0 0 Jul 15 ? 0:00 lvmkd
root 12 0 0 Jul 15 ? 0:00 lvmkd


reference:
http://en.wikipedia.org/wiki/Init

init man page:
http://docs.hp.com/en/B2355-60127/init.1M.html

[Raj D.]

Hi Shiv,

swapper is the first process in hp-ux , and with PID= 0 .



UID PID PPID C STIME TTY TIME COMMAND
root 0 0 0 Jul 13 ? 0:14 swapper
--------------------------------------------

Init is the 2nd process with PID=1 . And vhand is the 3rd with PID=2 .


Cheers,
Raj.

[Rajesh SB]

Hi Shiv,

First process started by HPUX is "swapper" with pid 0 used as RAMDISK. Next process is "init" with pid 1, which is ancestor of all the process.

init process with pid-1 is common across all the unix like Linux/Solaris.

Regards,
Rajesh SB

[Raj D.]

Shiv,

Also you can check this good document:

[ HP-UX Process Management: White Paper: ]

http://docs.hp.com/en/5965-4642/index.html


hth,
Raj.

[dirk dierickx]

swapper is not even a real process, ea it is not started from a binary from the disk. init is the first real process that gets read from disk.