Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

passing variable from bash to perl from bash script

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting passing variable from bash to perl from bash script
# 1  
Old 05-22-2008
Error passing variable from bash to perl from bash script
Hi All,
I need to pass a variable to perl script from bash script, where in perl i am using if condition. Here is the cmd what i am using in perl
Code:
FROM_DATE="06/05/2008"
TO_DATE="07/05/2008"

"perl -ne ' print if ( $_ >="$FROM_DATE" && $_ <= "$TO_DATE" ) ' filename"

filename has following data :-
Code:
06/05/2008-07:59
06/05/2008-07:59
06/05/2008-07:59
06/05/2008-07:59
06/05/2008-07:59
07/05/2008-07:59
07/05/2008-07:59
07/05/2008-07:59
07/05/2008-07:59
07/05/2008-07:59:server5:DISK
08/05/2008-07:59:server1:DISK
08/05/2008-07:59:server2:DISK
08/05/2008-07:59:server3:DISK
08/05/2008-07:59:server4:DISK
08/05/2008-07:59:server5:DISK

if we hard code the values of FROM_DATE and TO_DATE it is working.I feel what to know why it is not working When i passing it as variable.
it will be great if some one telle me How to pass the variable to perl properly. Smilie
i am new to perl world.
Thanks
Arsidh
Last edited by Yogesh Sawant; 05-22-2008 at 01:57 PM.. Reason: added code tags
# 2  
Old 05-22-2008
replace $FROM_DATE with $ENV{'FROM_DATE'}

replace $TO_DATE with $ENV{'TO_DATE'}
# 3  
Old 05-23-2008
Error passing variable from bash to perl from bash script
Hi Yogesh,
Thanks for your valuable input, and Thanks for reply on it.
I have included the sugeestion , you told me, But When i run it , i am not getting any data, which i want, but the comment from the file.

Here is the Modified Code :
===========================

#!/bin/bash

FROM_DATE="04/05/2008"
TO_DATE="06/05/2008"


perl -ne 'print if ( $_ >= $ENV{'FROM_DATE'} && $_ <= $ENV{'TO_DATE'} )' monitor.audit
exit
=====================================
The output is only the commented line

#Memory Usage
#Check the Availability
#Disk Monitor
#Load Monitor
#Memory Usage
#Check the Availability


The file monitor.audit data
====================


04/05/2008-12:16Smilier:453
04/05/2008-12:16::77
04/05/2008-12:16::138
#Load Monitor
04/05/2008-12:16Smiliera:0.39
04/05/2008-12:16::9.01
04/05/2008-12:16::0.39
#Memory Usage
04/05/2008-12:16Smilieraprd01:13
04/05/2008-12:16::18
04/05/2008-12:16::18
#Check the Availability
04/05/2008-12:32Smiliera:453
04/05/2008-12:32::77
04/05/2008-12:32::138
#Load Monitor
============================================

Can you please , tell what i need to do
Thanks
Arsidh
# 4  
Old 05-23-2008
Do this:

Code:
export FROM_DATE="04/05/2008"
export TO_DATE="06/05/2008"

# 5  
Old 05-23-2008
passing variable from bash to perl from bash script
Hi rikxik/Yogesh,
Cool Man , it is working with "export" cmd.
Thanks guys, you guys rocks.Smilie

Thanks a ton.
Arsidh
# 6  
Old 06-02-2008
CPU & Memory passing variable from bash to perl from bash script
Hi Guys,
Now have some other problem with Perl script.
The solution which is given is working perfectly , if the dates are with in same month.If i give dates like this

export FROM_DATE=04/05/2008
export TO_DATE=02/06/2008
perl -ne 'print if ( $_ >= "'$FROM_DATE'" && $_ <= "'$TO_DATE'" )' monitor.audit >$FINAL_DATA
Then nothing is comming in the log file.

monitor.audit
==================

06/05/2008-10:24: orasdfprd01:DATABASE:gecolfdsafprd :1
06/05/2008-10:24: cisdsfsdmarsp010:DATABASE:mafdsrp :1
06/05/2008-10:24: sdfsdacismarsfp011:DATABASE:dxfdslp :1
06/05/2008-10:24: alpfdscisfdfspdb053:DATABASE:mbdsfsop :1
12/05/2008-10:24: cisfsdfmasdfdsfrsp020:APPLCATION :1
12/05/2008-10:24: cisdsfdsfmarsp021:APPLCATION :1
12/05/2008-10:24: alpcsdfdsfispapp054:DISCOVER :0
12/05/2008-10:24: alpcsdfdsispapp055:DISCOVER :1
12/05/2008-10:39: orapsdafdsafrd01:DISK : 456
12/05/2008-10:39: cismdsafsdaarsp010:DISK : 77
12/05/2008-10:39: cisfsdafdsamarsp011:DISK : 138
20/05/2008-10:39: cismsdafsdaarsp020:DISK: 28
20/05/2008-10:39: cismfsdfsdarsp021:DISK: 28
20/05/2008-10:39: alpcsdfdsispapp054:DISK: 190
20/05/2008-10:39: alpcifasfsdaspapp055:DISK: 190
20/05/2008-10:39: alpcfsdafsdaispdb053:DISK: 309
02/06/2008-10:39: orasdfdsprd01:LOAD: 1.05
02/06/2008-10:39: cisdsfdsmarsp010:LOAD:2.86
02/06/2008-10:39: cissdafdsmarsp011:LOAD:0.43
02/06/2008-10:39: cismasadfsdrsp020:LOAD:0.12
02/06/2008-10:39: cismarsdfdssp021:LOAD:0.08
02/06/2008-10:39: alpcisdsfdsapapp054:LOAD:0.44

================================

Please can any one suggest on this .
# 7  
Old 06-03-2008
You should be aware, though, that Perl's <= and >= operators simply do numeric comparison. In other words, your script will not work without modification e.g. across a month boundary. The solution is to parse the date strings, and use the resulting raw numbers for comparison.

Oops, you noticed already. Anyway, Google for date parsing in Perl. Also perhaps read the time and date handling threads in the FAQs for these forums.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Web Development

Passing variable from PHP to bash script

I am totally new to PHP and I am trying to create a script that will as a user for a hostname and then use the "hostname" variable to generate a report using REST API. I am able to create the html script and php script to GET the "hostname" but I am having trouble passing the hostname variable... (10 Replies)
Discussion started by: kieranfoley
10 Replies

2. Shell Programming and Scripting

Passing variable from bash to perl script

Hi All, I need to pass a variable from bash script to perl script and in the perl script i am using those variables in the sql query but its giving error : Use of uninitialized value $ENV{"COUNTRYCD"} in concatenation (.) or string at /GIS_ROOT/custom/tables/DBread_vendor.pl line 50. Can ... (6 Replies)
Discussion started by: NileshJ
6 Replies

3. Shell Programming and Scripting

Passing arguments to a bash script

Hi, I wanted to pass an argument to a bash script. So that the argument is used inside the awk command inside the bash script. I know the noraml way of passing argument to a bash script as below : sh myScript.sh abc Inside the bash script i can use like this myArg1=$1 wc $myArg But... (8 Replies)
Discussion started by: shree11
8 Replies

4. Shell Programming and Scripting

Passing string from SQL to a BASH script

OS Solaris 10, DB oracle 10g Hello, We currently have a BASH script that runs and moves image files from a remote server to the local db server. A snippet of the code shows that we are picking up all Images that are 'mtime -1' some code... for file in `ssh user@10.200.200.10 'find... (3 Replies)
Discussion started by: JonP
3 Replies

5. Shell Programming and Scripting

How to change Linux Terminal environment variable in a perl or bash script?

Hi, I meet an problem that it cannot change Terminal environment variable in a perl or bash script. This change can only exist and become effective in script lifetime. But I want to make this change take effect in current opened Terminal. In our view, the thought seems to be impossible, As... (9 Replies)
Discussion started by: weichanghe2000
9 Replies

6. Shell Programming and Scripting

Passing string as variable(s) in bash

I'm trying to write a basic bash script that takes input you give (what directory, if any, what name, if any ....) and passes the information to find. I'm trying to just create a string with all variables and then pass it to find. So far I have this extremely simple: #!/bin/bash -f ... (2 Replies)
Discussion started by: Starting_Leaf
2 Replies

7. Shell Programming and Scripting

Trouble with passing Variable from bash to awk gsub command

Would really appreciate it if someone could point out my mistake in this line of code, i've been staring blankly at it trying everything i can think of some time now and coming up with nothing. #!/bin/bash echo "Enter Username" read Username awk -F: -v var=${Username} '/^var:/... (9 Replies)
Discussion started by: Nostyx
9 Replies

8. Shell Programming and Scripting

Passing Bash variable to javascript

How do I pass a bash variable to a javascript? I've tried #!/bin/bash echo "Content-type: text/html" echo "" echo "<html>" echo "<head>" counter=0 echo '<script> window.parent.document.forms.counter.value = "$counter"; </script>' I have an iframe script which I am trying to pass a... (3 Replies)
Discussion started by: numele
3 Replies

9. Shell Programming and Scripting

Passing a MySql password from bash script

Hi all, I am running this script on Mandrakelinux release 10.1, 2.6.8.1-12mdksmp #1 SMP I have also installed 'expect' separately. I have created an Rsync script, but before any Rsync command does run, a MySql dump must be done first, and I am battling a bit to pass the MySql password from... (2 Replies)
Discussion started by: codenjanod
2 Replies

10. Shell Programming and Scripting

Passing options to a bash script

I'm just not sure where to start looking into this. I want to be able to create switches for my script. Back in the day I'd make my scripts interactive...you know: echo "what report do you want" echo "A)boxes with errors" echo "B)boxes with more than 5 errors" echo "C)Service groups that have... (3 Replies)
Discussion started by: DeCoTwc
3 Replies
Login or Register to Ask a Question