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Full Discussion: Using forward slash in search pattern in perl script
Top Forums UNIX for Beginners Questions & Answers Using forward slash in search pattern in perl script Post 302975508 by bakunin on Tuesday 14th of June 2016 01:37:02 PM
Old 06-14-2016
Quote:
Originally Posted by ambarginni
and I wanted to include below keywords in my search pattern
Code:
 "I/O exception" and "FileNotFoundException"

It is relatively easy: the forward slash has a special meaning. Whenever you want to use a character with a special meaning literally you need to "escape" it. Escaping is done by prepending it with a backslash:

Code:
my $pattern = "^Line.*?:|^Errors*: [^0]|[...]|I\/O exception";

Notice that "|" separates different patterns to seach for and is like a logical OR. The expression

Code:
"ab|cd|ef|gh"

searches for any occurrence of "ab" or "cd" or "ef" or "gh". Therefore to add a pattern just add a "|" at the end and then the pattern you intend to search for.

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
ambarginni
 

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LEARN ABOUT DEBIAN

ptargrep

PTARGREP(1)						 Perl Programmers Reference Guide					       PTARGREP(1)

NAME

       ptargrep - Apply pattern matching to the contents of files in a tar archive

SYNOPSIS

	 ptargrep [options] <pattern> <tar file> ...

	 Options:

	  --basename|-b     ignore directory paths from archive
	  --ignore-case|-i  do case-insensitive pattern matching
	  --list-only|-l    list matching filenames rather than extracting matches
	  --verbose|-v	    write debugging message to STDERR
	  --help|-?	    detailed help message

DESCRIPTION

       This utility allows you to apply pattern matching to the contents of files contained in a tar archive.  You might use this to identify all
       files in an archive which contain lines matching the specified pattern and either print out the pathnames or extract the files.

       The pattern will be used as a Perl regular expression (as opposed to a simple grep regex).

       Multiple tar archive filenames can be specified - they will each be processed in turn.

OPTIONS

       --basename (alias -b)
	   When matching files are extracted, ignore the directory path from the archive and write to the current directory using the basename of
	   the file from the archive.  Beware: if two matching files in the archive have the same basename, the second file extracted will
	   overwrite the first.

       --ignore-case (alias -i)
	   Make pattern matching case-insensitive.

       --list-only (alias -l)
	   Print the pathname of each matching file from the archive to STDOUT.  Without this option, the default behaviour is to extract each
	   matching file.

       --verbose (alias -v)
	   Log debugging info to STDERR.

       --help (alias -?)
	   Display this documentation.

COPYRIGHT

       Copyright 2010 Grant McLean <grantm@cpan.org>

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

perl v5.14.2							    2014-09-30							       PTARGREP(1)
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