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Full Discussion: How to handle grepping variable data containing wildcards?
Top Forums Shell Programming and Scripting How to handle grepping variable data containing wildcards? Post 302983348 by abercrom on Monday 10th of October 2016 01:16:56 PM
Old 10-10-2016
How to handle grepping variable data containing wildcards?
I have a lot of files with keywords and unique names. I'm using a shell script to refer to a simple pattern file with comma separated values in order to match on certain keywords. The problem is that I don't understand how to handle the wildcard values when I want to skip over the unique names.

Here is an example of the data patterns in the files:

Code:
abcd efgh ijkl
abcd efgh ijkl
abcd mnop unique-name01 efgh ijkl
abcd mnop unique-name02 efgh ijkl
abcd efgh ijkl


An example of the pattern file:

Code:
abcd efgh ijkl,LABEL001 LABEL002
mnop .* efgh ijkl,LABEL001 LABEL003


The shell script operates like this:

Code:
while IFS= read -r fi
  fn=`awk -F, '{print $NF}'`
  fp=`awk -F, '{print $1}'`

  echo "Pattern: \"$fp\""
  egrep "$fp" $source_file

done < pattern_file


The result looks like this:

Code:
Pattern: "abcd efgh ijkl"

[matches]
Code:
Pattern: "abcd mnop . .. efgh ijkl"

[no matches]

I get correct matches on the patterns that do not use a wildcards, so I know the script is working in that respect.
The wildcard patterns do not work, and it looks like the wildcards themselves are getting mangled somehow. In this example, the pattern has changed from "abcd mnop .* efgh ijkl" to "abcd mnop . .. efgh ijkl"

Thanks
Last edited by Scrutinizer; 10-10-2016 at 02:20 PM.. Reason: additional code tags for data samples
 

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LEARN ABOUT MOJAVE

locale::codes::langext5.18

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) 2011-2013 Sullivan Beck

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

perl v5.18.2							    2013-11-04					       Locale::Codes::LangExt(3pm)
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