Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Parsing null or empty output
Top Forums UNIX for Beginners Questions & Answers Parsing null or empty output Post 303009253 by MadeInGermany on Monday 11th of December 2017 12:58:18 PM
Old 12-11-2017
Quote:
Originally Posted by apmcd47
Code:
if [[ ${lastseen:-a} =~ [^0-9] ]]
then 
   echo "Serial number invalid"
   exit 3
fi

If lastseen is null or unset replace with an invalid string sequence. In this case the letter a will suffice.

Andrew
I call this a trick.
Nice somehow, but I am not going to recommend that as a common practice...
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to check for null or empty string

Hi, I need to check for value not equal (<>) to 21 and not equal empty or null values. Please modify this script if then echo "$VALUE,$BSC_NAME,$BSC_ID" > $OUT_FILE/power_up.out end if TQ (5 Replies)
Discussion started by: doer
5 Replies

2. Shell Programming and Scripting

Removing Null data in output

Hello all, I have a script that has an infile with system package information. For the most part the script is looking well. The only thing i need help is in testing for null entries and removing null data. #!/usr/bin/ksh for i in `cat /mwncps/bin/eco_pack` do NAME=`pkginfo -l |... (2 Replies)
Discussion started by: liketheshell
2 Replies

3. Shell Programming and Scripting

Table null is empty

hi I m executing a shell script in which records are to be fetched from a table. If the sql that is running empty result set it is displaying "table null is empty !". I dont want this msg on the standard output. COuld you please help me in this regard (3 Replies)
Discussion started by: priyanka3006
3 Replies

4. UNIX for Dummies Questions & Answers

cp output /dev/null results in not a directory

Hello, I am working on a script to measure the read performance of a busybox environment. The logical choice is to use a command line like: (time cp * /dev/null) 2> /tmp/howlong.txt Ah, the rub is cp or /dev/null will only accept a single file at a time. The result in the txt file is and... (1 Reply)
Discussion started by: stevesmo
1 Replies

5. Shell Programming and Scripting

PHP: how can I delete empty/NULL elements from a multi-dimensional array.

Hi all I have a file that i'm running and exec(cat ./dat) against..and putting its contents into any array, then doing an exploding the array into a multi-dimension array... The 15 multi-dimensional arrays have elements that are null/empty, I would like to remove/unset these elements and then... (2 Replies)
Discussion started by: zeekblack
2 Replies

6. Shell Programming and Scripting

Redirect system output to null in perl

Hi Guys, Please help me.. it is urgent. I am writing a perl script to capture command output and redirect it to a logfile.At the same i want to check the return code of the command and log it if the command is not succesful in my logfile.. Here is my code, it is working but system command inside... (2 Replies)
Discussion started by: sriramperumalla
2 Replies

7. Shell Programming and Scripting

redirect the audio output to /dev/null

I'm using an text-to-speech synthesis in a script, and I need to redirect it's output to /dev/null how can I do that ? And how to redirect the stream to his normal output then （sound card ) ? thankx (2 Replies)
Discussion started by: firelink
2 Replies

8. Shell Programming and Scripting

How to handle NULL value output from ISQL command?

I am using ISQL command in ksh script. Suppose if i get NULL value from the query which i run,how can i handle it? I am getting a NULL result set and the following error is coming. ############### output of isql command for getting the sum of JEs ################ ----------- NULL... (4 Replies)
Discussion started by: Sharma331
4 Replies

9. Shell Programming and Scripting

How to control a null output in EMC storage?

I dont want to print the output in a EMC VMAX storage if it says "The specified device was not found", however it is not letting me do it. I am trying to run this command: symaccess -sid xxxx list -type storage -devs 1234 output: The specified device was not found I just want the script... (1 Reply)
Discussion started by: prodigy06
1 Replies

10. Shell Programming and Scripting

Identify empty file with null record

Hi Team, I have a file abc.dat which is a empty file. But it has null record in first line. I need to identify this unique file and handle it separately. scenario 1: abc/dw> wc abc.dat 1 0 1 abc.dat abc/dw> cat abc.dat abc/dw> scenario 2: abc/dw> wc pqr.dat 0 0 0 pqr.dat... (3 Replies)
Discussion started by: kmanivan82
3 Replies

LEARN ABOUT DEBIAN

locale::currency

Locale::Currency(3perl) 				 Perl Programmers Reference Guide				   Locale::Currency(3perl)

NAME

       Locale::Currency - standard codes for currency identification

SYNOPSIS

	   use Locale::Currency;

	   $curr = code2currency('usd');     # $curr gets 'US Dollar'
	   $code = currency2code('Euro');    # $code gets 'eur'

	   @codes   = all_currency_codes();
	   @names   = all_currency_names();

DESCRIPTION

       The "Locale::Currency" module provides access to standard codes used for identifying currencies and funds, such as those defined in ISO
       4217.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 4217
       three-letter codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying currencies. The ones currently supported are:

       alpha
	   This is a set of three-letter (uppercase) codes from ISO 4217 such as EUR for Euro.

	   Two of the codes specified by the standard (XTS which is reserved for testing purposes and XXX which is for transactions where no
	   currency is involved) are omitted.

	   This code set is identified with the symbol "LOCALE_CURR_ALPHA".

	   This is the default code set.

       num This is the set of three-digit numeric codes from ISO 4217.

	   This code set is identified with the symbol "LOCALE_CURR_NUMERIC".

ROUTINES

       code2currency ( CODE [,CODESET] )
       currency2code ( NAME [,CODESET] )
       currency_code2code ( CODE ,CODESET ,CODESET2 )
       all_currency_codes ( [CODESET] )
       all_currency_names ( [CODESET] )
       Locale::Currency::rename_currency  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Currency::add_currency  ( CODE ,NAME [,CODESET] )
       Locale::Currency::delete_currency  ( CODE [,CODESET] )
       Locale::Currency::add_currency_alias  ( NAME ,NEW_NAME )
       Locale::Currency::delete_currency_alias	( NAME )
       Locale::Currency::rename_currency_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Currency::add_currency_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Currency::delete_currency_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes man page.

SEE ALSO

       Locale::Codes
       Locale::Constants
       http://www.iso.org/iso/support/currency_codes_list-1.htm
	   The ISO 4217 data.

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 1997-2001 Canon Research Centre Europe (CRE).
	  Copyright (c) 2001	  Michael Hennecke
	  Copyright (c) 2001-2010 Neil Bowers
	  Copyright (c) 2010-2011 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2011-09-26						   Locale::Currency(3perl)
All times are GMT -4. The time now is 06:49 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy