Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: awk processing of passed variables
Top Forums Shell Programming and Scripting awk processing of passed variables Post 302781893 by Mid Ocean on Monday 18th of March 2013 03:53:49 AM
Old 03-18-2013
awk processing of passed variables
Currently have this:

Code:
set current=192.168.0.5
set servicehost = `echo $current | awk -F. '{print $4}'`
echo $numberoffields

5

..but would like to reduce # of variables and eliminate echo to have something like this:

Code:
set servicehost = `awk -v s="$current" -F. 'BEGIN{print $2}'`

But doesn't work. In a similar vein how to determine NR and NF on variables passed via -v .. if possible. For example how to replace the following:

Code:
set string = "hello world"
set numberoffields = `echo $string | awk '{printf("%s\n",NF)}'`
echo $numberoffields

2

..with something like this:

Code:
set string = "hello world"
set numberoffields = awk -v s=$string 'BEGIN{printf("%s\n",NF)}'
echo $numberoffields

0

Would be great if it returned 2 somehow :-)
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

variable passed to awk

Anybody know what's wrong with this syntax? awk -v job="$job" 'BEGIN { FS="|"} {print $1,$2," ",$4," ",$3\n,$5,"\n"}' list It's keeping give me this message: awk: syntax error near line 1 awk: bailing out near line 1 It seems awk has problem with my BEGIN command. Any... (8 Replies)
Discussion started by: whatisthis
8 Replies

2. UNIX for Dummies Questions & Answers

variable passed to awk

Does anybody know how to print a variable passed to awk command? awk -F"|" 'BEGIN {print $job,"\n","Question \n"} {print $1,$2$4," ",$3}' "job=$job1" file1 I am trying to pass job the variable job1. the output is blank. ?? (3 Replies)
Discussion started by: whatisthis
3 Replies

3. Shell Programming and Scripting

AWK: Retrieving names of variables passed with -v

I'm an experienced awk user, but this one has me stumped. I have an awk script which is called from a UNIX command line as you'd expect: myscript.awk -v foo=$1 -v bar=$2 filename My question is this: is there a mechanism for determining the names of the -v variables within a script? ... (3 Replies)
Discussion started by: John Mac
3 Replies

4. Shell Programming and Scripting

Processing text variables that have numbers in CShell

Hello, I have a case where I need to process an environment variable text value in CShell to calculate the product of 2 numbers stated in the variable string having the format "<first_number>Letter x<second_number>". Ex: $VAR = "24x20" I need to set $VAR_PRODUCT = "Product of 20 and 24"... (3 Replies)
Discussion started by: mohy
3 Replies

5. Programming

awk processing / Shell Script Processing to remove columns text file

Hello, I extracted a list of files in a directory with the command ls . However this is not my computer, so the ls functionality has been revamped so that it gives the filesizes in front like this : This is the output of ls command : I stored the output in a file filelist 1.1M... (5 Replies)
Discussion started by: ajayram
5 Replies

6. Shell Programming and Scripting

awk - Why can't value of awk variables be passed to external functions ?

I wrote a very simple script to understand how to call user-defined functions from within awk after reading this post. function my_func_local { echo "In func $1" } export -f my_func_local echo $1 | awk -F"/" '{for (k=1;k<=NF;k++) { if ($k == "a" ) { system("my_local_func $k") } else{... (19 Replies)
Discussion started by: sreyan32
19 Replies

7. Shell Programming and Scripting

Multiple bash variables passed into nawk

I have a file that has 2 fields called b_file: 11977 DAR.V3.20150209.1.CSV 3295 DAR.V3.20150209.1.CSV 1721 DAR.V2.20150210.1.CSV I need to search a sftplog using the field 1, but want to maintain the relationship between field 1 and 2. I am passing field 1 as a parameter in a bash loop. ... (14 Replies)
Discussion started by: smenago
14 Replies

8. Shell Programming and Scripting

Shell Variables passed to awk to return certain rows

Hi Forum. I have the following test.txt file and need to extract certain rows based on "starting position", "length of string" and "string to search for": 1a2b3d 2a3c4d ..... My script accepts 3 parameters: (starting col pos, length to search for, string to search for) and would like to... (4 Replies)
Discussion started by: pchang
4 Replies

9. UNIX for Dummies Questions & Answers

Multiple variables to be passed in a loop

Hi, I need to pass the multiple values of src1 to another variable. I managed to print it but not sure how to assign it to a variable in a loop. src1=01,02,03 echo $src1|awk 'BEGIN {FS=","} {for(i=1;i<=NF;i++) print $i}' I need to pass the value as src2=01 src2=02 src2=03 Thanks... (4 Replies)
Discussion started by: shash
4 Replies

10. Shell Programming and Scripting

Shell script to create runtime variables based on the number of parameters passed in the script

Hi All, I have a script which intends to create as many variables at runtime, as the number of parameters passed to it. The script needs to save these parameter values in the variables created and print them abc.sh ---------- export Numbr_Parms=$# export a=1 while do export... (3 Replies)
Discussion started by: dev.devil.1983
3 Replies

LEARN ABOUT OSX

locale::codes::langext

Locale::Codes::LangExt(3pm)				 Perl Programmers Reference Guide			       Locale::Codes::LangExt(3pm)

NAME

       Locale::Codes::LangExt - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangExt;

	  $lext = code2langext('acm');		       # $lext gets 'Mesopotamian Arabic'
	  $code = langext2code('Mesopotamian Arabic'); # $code gets 'acm'

	  @codes   = all_langext_codes();
	  @names   = all_langext_names();

DESCRIPTION

       The "Locale::Codes::LangExt" module provides access to standard codes used for identifying language extensions, such as those as defined in
       the IANA language registry.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default IANA language
       registry codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language extensions. A code set may be specified using either a name, or
       a constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langext('acm','alpha');
	  $lext = code2langext('acm',LOCALE_LANGEXT_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from the IANA language registry, such as 'acm' for Mesopotamian Arabic.

	   This is the default code set.

ROUTINES

       code2langext ( CODE [,CODESET] )
       langext2code ( NAME [,CODESET] )
       langext_code2code ( CODE ,CODESET ,CODESET2 )
       all_langext_codes ( [CODESET] )
       all_langext_names ( [CODESET] )
       Locale::Codes::LangExt::rename_langext  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangExt::add_langext  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangExt::delete_langext  ( CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangExt::delete_langext_alias  ( NAME )
       Locale::Codes::LangExt::rename_langext_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::delete_langext_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.iana.org/assignments/language-subtag-registry
	   The IANA language subtag registry.

AUTHOR

       See Locale::Codes for full author history.

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

COPYRIGHT

	  Copyright (c) 2011-2012 Sullivan Beck

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

perl v5.16.2							    2012-10-11					       Locale::Codes::LangExt(3pm)
All times are GMT -4. The time now is 02:12 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy