topic cpio ?? in Operating System - HP-UX

cpio ??

Amit Dixit_2 — Thu, 01 Jul 2004 09:09:28 GMT

Hi
I am having a script like this

install_informix_dir=/opt/install_informix_dir
informix_dir=/opt/informix

Now it executes a tar command to extract
informix tar

tar xf

and then

mkdir $informix_dir
cd $informix_dir

Then it is having these 2 cpio command, please explain what this is doing

cpio -icdBum < $informix_install_dir/informix/server/ids.cpi > /dev/null 2>&1

cpio -icdBum < $informix_install_dir/informix/iconnect/hp/connect.cpi > /dev/null 2>&1

What are the above 2 CPIO command doing please explain.....

Thanks,
Amit

Re: cpio ??

Todd McDaniel_1 — Thu, 01 Jul 2004 09:12:04 GMT

Looks like you are cping files to the dir you just made and want to see errors goin to STDOUT from STDERR...

Re: cpio ??

Muthukumar_5 — Thu, 01 Jul 2004 10:07:00 GMT

Hai,

You are coping the ids.cpi and connect.cpi files to pwd directory with the same directory path. It will use the read / write headers in ASCII format.

cpio is using the method of extraction of files from the standard input.

If you want to redirect to or from devices,we have to use B option to control the block input / output to 5120 bytes.

Old files are not replaced with the new files with it's name. It will use the same modification time as before extraction.

STDOUT messages are Redirected to null device. Error messages are redirected to STDOUT mode.

I hope B option is not needed if you are not using the devices.

Regards,
Muthukumar.

Re: cpio ??

Amit Dixit_2 — Thu, 01 Jul 2004 10:19:43 GMT

Hi,
Thanks for the reply but the script is
not doing what it is suppose to do
It doesn't create the same directory
structure and cpi's the file to them

What could be the possible reason for
this and can I display error on screen.

Thanks,
Amit

Re: cpio ??

Kevin Batter_4 — Thu, 01 Jul 2004 10:34:10 GMT

silly ?

but should the cpios be
$install_informix_dir not $informix_install_dir

Re: cpio ??

Amit Dixit_2 — Thu, 01 Jul 2004 10:58:20 GMT

Hi,
That is not the mistake I typed it wrong
on ITRC but in the script there is no
mistake related to that

Please see the attached for the details
and tell me what I am doing wrong.

Thanks,
Amit