topic Re: command querry in Operating System - HP-UX

command querry

kumardev — Thu, 09 Apr 2009 13:15:51 GMT

Hi,
I am not a newbie to hp-ux but just want to know that after we have run a specific command how does the commad internally works to get us the desired output? like what system call it internall calls, how may process it spawns and what is the command execution flow? etc

Thx for the answers.

Regards
Dev

Re: command querry

James R. Ferguson — Thu, 09 Apr 2009 13:22:07 GMT

Hi:

As a general answer, it would be helpful to run 'tusc' against an actual command (process):

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/tusc-7.9/

Regards!

...JRF...

Re: command querry

Pete Randall — Thu, 09 Apr 2009 13:23:32 GMT

You want us to tell you all the possible system calls invoked by all the possible commands? That could be a little tough. I would suggest that you might start by a careful read of the man pages for the particular command that you're interested in.

Pete

Re: command querry

Mel Burslan — Thu, 09 Apr 2009 14:16:09 GMT

This question sounded like a mid-term question for "systems programming 401" class to me. If you are really curious about how HP-UX innards operate in the system calls level, I'd suggest you buy the HP-UX 11i Internals book and read it. I am sure it will put you sleep faster than an Ambien CR pill, but here it is:

http://www.amazon.com/HP-UX-Internals-Hewlett-Packard-Professional-Books/dp/product-description/0130328618

Re: command querry

Frank de Vries — Thu, 09 Apr 2009 14:17:05 GMT

Tusc is already mentioned,
really good tool.

But indeed it is usefulness when you can compare a good and bad process increases,
because it is easier to compare the differences.

Another good one is 'lsof'
You can get lsof from the HP porting and archive centre at http://hpux.cae.wisc.edu/

have fun ...

Re: command querry

Ganesan R — Thu, 09 Apr 2009 14:17:08 GMT

Hi,

tusc is the tool which trace unix system calls.

Read the man page here to know more about it.

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/tusc-7.9/man.html