RE: setting unix command through perl script

if you're trying to set just a environment variable for the perl script
then you can do (in your shell):

$ export CCASE_NO_FILE_HEADER=yes
$ perl /home/m.belgaonkar/merge_latest.pl

if you want to set the variable for another task (in your perl code):


#!/usr/bin/perl
use strict;
...your perl code...
qx(CCASE_NO_FILE_HEADER=yes perl /home/m.belgaonkar/merge_latest.pl);
...more perl code...

On 13:23:13 17/04/2008 <Irfan.Sayed@xxxxxxxxxxxxx> wrote:
Thanks for your reply.

I have run the command like this....

-> qx(CCASE_NO_FILE_HEADER=yes perl /home/m.belgaonkar/merge_latest.pl
)
bash: syntax error near unexpected token `qx(CCASE_NO_FILE_HEADER=yes'
m.belgaonkar@bogota ():/view/m.belgaonkar_oms_test/vob/oms [320]

Please help.

Regards,
Irfan

Project Lead
TSINDIA - Production Line
Individual Software Solutions - UMO
T-Systems India Private Limited, Pune
Telephone: +91-20-30245000/25605000 (Extn: 5271)
Mobile: +91 9822 854 227
Fax: +91-020 25674090
Internet: http://www.t-systems.com


-----Original Message-----
From: Martin Barth [mailto:martin@xxxxxxxxxx]
Sent: Thursday, April 17, 2008 4:42 PM
To: beginners@xxxxxxxx
Subject: RE: setting unix command through perl script

hi,

you could do something like that:

qx(CCASE_NO_FILE_HEADER=yes /path/to/your/task);

this would set the variable only for this task.

HTH,
Martin

On 11:48:35 17/04/2008 <Irfan.Sayed@xxxxxxxxxxxxx> wrote:
Thanks for your help.

Actually , I am automating one task in Perl in which this command
is there. If I don't execute this command then entire task would
fail. So it's very important that I should set this variable with
proper value and then start the execution of the task.

Regards,
Irfan


-----Original Message-----
From: Martin Barth [mailto:martin@xxxxxxxxxx]
Sent: Thursday, April 17, 2008 3:02 PM
To: beginners@xxxxxxxx
Subject: RE: setting unix command through perl script

Hi,

maybe yes. why do you need this variable to be set/changed? tell us
some more about your objectives, please.

Regards Martin

On 11:25:01 17/04/2008 <Irfan.Sayed@xxxxxxxxxxxxx> wrote:
Hi,

OK. Thanks.

IS there any other mechanism to achieve this??

Regards,
Irfan

-----Original Message-----
From: Martin Barth [mailto:martin@xxxxxxxxxx]
Sent: Thursday, April 17, 2008 1:01 PM
To: beginners@xxxxxxxx
Subject: RE: setting unix command through perl script

Hi

your "command" is executed. it changes the environment of the
shell you spawn with qx(); but after this statement your shell
dies and it seems that
nothing happend..

it is simply impossible to change the environment of a parent
when you're a
child.

maybe you can add this line to your shell configuration file.
(.bash_profile or .zshrc ...)

Regards Martin

On 9:05:15 17/04/2008 <Irfan.Sayed@xxxxxxxxxxxxx> wrote:
I want to execute "export CCASE_NO_FILE_HEADER=yes" command
in Perl script.
If I run this command on bash prompt then it is executing
properly but if I try to execute this command through perl
script then it is not executing at all

How should I achieve this . is there any another way.

Please help.

Regards,
Irfan

-----Original Message-----
From: Kenneth Wolcott [mailto:kennethwolcott@xxxxxxxxx]
Sent: Thursday, April 17, 2008 12:05 AM
To: beginners@xxxxxxxx
Subject: Fwd: setting unix command through perl script

Oops -- did reply and instead of reply-all :-(

---------- Forwarded message ----------
From: Kenneth Wolcott <kennethwolcott@xxxxxxxxx>
Date: Wed, Apr 16, 2008 at 11:33 AM
Subject: Re: setting unix command through perl script
To: martin@xxxxxxxxxx


Agreed that the parent process in which perl was invoked will
not be changed
by the perl script.

What is the overall objective?

Try to do everything you need to do inside the perl script,
or everything
you need to do outside the perl script.

HTH,
Ken Wolcott


On Wed, Apr 16, 2008 at 5:31 AM, Martin Barth
<martin@xxxxxxxxxx> wrote:

i think this is not possible.

if you start a new process (shell) it gets the
environment of its parent
process. but if you manipulate the environment in a child
the parent will
not notice this..

for example

$ bash
$ export FOO=BAR
$ echo $FOO
BAR
$ exit
$ echo $FOO


Regards Martin


On 14:20:18 16/04/2008 <Irfan.Sayed@xxxxxxxxxxxxx> wrote:
I tried the line : $ENV{CCASE_NO_FILE_HEADER} = 'yes';

But still the value is not getting set.

Please help.

Regards,
Irfan

Project Lead
TSINDIA - Production Line
Individual Software Solutions - UMO
T-Systems India Private Limited, Pune
Telephone: +91-20-30245000/25605000 (Extn: 5271)
Mobile: +91 9822 854 227
Fax: +91-020 25674090
Internet: http://www.t-systems.com


-----Original Message-----
From: Rodrick Brown [mailto:rodrick.brown@xxxxxxxxx]
Sent: Wednesday, April 16, 2008 5:04 PM
To: Sayed, Irfan
Cc: beginners@xxxxxxxx
Subject: Re: setting unix command through perl script

On Wed, Apr 16, 2008 at 7:05 AM, <Irfan.Sayed@t-systems
.co
m>
wrote: Hi All,



I need to execute the "export CCASE_NO_FILE_HEADER=y
es"
command through Perl script.



What I did is qx(export CCASE_NO_FILE_HEADER=yes);
but still the value for CCASE_NO_FILE_HEADER is not
getting set to "yes"


Regards,

Irfan





With Perl you can get and set environment variables
through using %ENV
ie. $ENV{FOO} = 'bar'

--
[ Rodrick R. Brown ]
http://www.rodrickbrown.com
http://www.linkedin.com/in/rodrickbrown

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