topic PID Number in the TOP in Operating System - HP-UX

PID Number in the TOP

clefeitosa — Wed, 07 Feb 2007 12:00:19 GMT

Hello experts!

I'm using HPUX 11i.

Please I would like to know how can I get the PID number in the TOP... For example

host:> top -h

CPU TTY PID USERNAME PRI NI SIZE RES STATE TIME %WCPU %CPU
3 ? 13538 oracle9i 154 20 643M 7764K sleep 0:40 4.98 4.97 oracledbscmdes
1 ? 5819 root 154 20 9632K 2848K sleep 1514:55 3.17 3.16 cupsd
0 ? 7125 root 154 20 12024K 3140K sleep 433:13 2.90 2.89 netmon
0 ? 29685 oracle9i 154 20 800M 1788K sleep 33:15 2.36 2.36 oracledbslade1

In this case I need the 13538 PID number!
By command line is it possible to get this PID number?

Please, could someone give me a help?

Thanks!

Re: PID Number in the TOP

A. Clay Stephenson — Wed, 07 Feb 2007 12:09:43 GMT

You can use top -f filename to output to a file and then use awk to extract the PID's.

Re: PID Number in the TOP

clefeitosa — Wed, 07 Feb 2007 12:28:41 GMT

Thanks for reply!

Sorry, but could you show an example because my problem is exactly this... I'm not obtaining to extract the first PID on the TOP...

Thanks!!!!

Re: PID Number in the TOP

Pete Randall — Wed, 07 Feb 2007 12:33:11 GMT

Unless I'm missing something, the -f switch adds nothing to the normal display, it just redirects the output to a file. The only way I know of to get the parent is to select the process you are interested in from the top output and then run ps against it:

ps -ef |grep 13538

Pete

Re: PID Number in the TOP

Pete Randall — Wed, 07 Feb 2007 12:36:30 GMT

Ahhh, that's where the confusion is coming from. I think the author means PPID of the PID in question!!

Pete

Re: PID Number in the TOP

Ignacio Javier — Wed, 07 Feb 2007 12:37:05 GMT

Hi clefeitosa:

You could open the file and remove all the lines until PID inclusive, save the file and then execute:

cat | awk -F" " '{print $2}'

Re: PID Number in the TOP

A. Clay Stephenson — Wed, 07 Feb 2007 12:52:29 GMT

The other thing that -f does is NOT SEND terminal escape sequences that you definitely don't want in your output when you are trying to parse it.

Re: PID Number in the TOP

Scot Bean — Wed, 07 Feb 2007 13:36:04 GMT

Or, 'ps -ef |grep 13538'

Re: PID Number in the TOP

Dennis Handly — Thu, 08 Feb 2007 02:29:14 GMT

Instead of using grep with ps, you can do it directly: ps -fp 13538

But grep will find the children of that PID.

Re: PID Number in the TOP

Arturo Galbiati — Thu, 08 Feb 2007 04:50:39 GMT

Hi,
top -h -f top.out
awk 'NF>12&&!/^CPU/ {print $3}' top.out

This to have all the PID, if you want only the first:
awk 'NF>12&&!/^CPU/ {print $3}' top.out|head -1

HTH,
Art

Re: PID Number in the TOP

clefeitosa — Thu, 08 Feb 2007 05:53:13 GMT

Hi!

Thanks everbody for all answers!!!

Arturo,

I liked your tips but happens:

host:~> top -h -f top.out
host:~>awk 'NF>12&&!/^CPU/ {print $3}' top.out | head -1
/: Event not found.

Do you know why this happens (Event not found)

Please, could you explain what means the parameters "NF>12&&!/^CPU/" because I didn't understand.

Thanks a lot!

Re: PID Number in the TOP

Dennis Handly — Thu, 08 Feb 2007 06:08:15 GMT

>Do you know why this happens (Event not found)

Is this in the file top.out? Or from awk?

>could you explain what means the parameters "NF>12&&!/^CPU/"

For all lines that have more than 12 fields and don't have the string "CPU" starting in column 1.

Re: PID Number in the TOP

Dennis Handly — Thu, 08 Feb 2007 06:13:51 GMT

>Do you know why this happens (Event not found)

Ah! Are you using the scummy C shell?

This occurs because of the !/, even in single quotes. You can suppress it by going to a real shell or in this case by adding a space between ! and /. Or you can quote it:
% echo '\!/'
!/

Re: PID Number in the TOP

clefeitosa — Thu, 08 Feb 2007 06:34:46 GMT

Very nice!!!!

Success using the command:
awk 'NF>12&& ! / ^CPU / {print $3}' top.out | head -1 (Thanks Arturo e Dennis)

One last question... Using the above command I received the result:
PID

If I use with ... | head -2 I receive the result:
PID
13538

How can I get only 13538?? Is it possible?

Sorry for many questions....

Thanks!

Re: PID Number in the TOP

Ignacio Javier — Thu, 08 Feb 2007 06:41:45 GMT

Hi:

you could add to the sentence, "| grep -v PID"

Regards

Re: PID Number in the TOP

Dennis Handly — Thu, 08 Feb 2007 06:42:46 GMT

>Using the above command I received the result:
PID

You added too many spaces. You should not have fiddled with the /^CPU/. Treat that if it was in quotes. (That is a regular expression matching expression.)
% awk 'NF>12 && ! /^CPU/ {print $3}' top.out | head -1

Re: PID Number in the TOP

clefeitosa — Thu, 08 Feb 2007 07:33:33 GMT

Dennis,

Thank you very much!!!!!
You all right...

Thanks everbody!

Best regards,
clefeitosa!