Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: if match found go to a particular line in perl
Top Forums Shell Programming and Scripting if match found go to a particular line in perl Post 302179515 by user_prady on Thursday 27th of March 2008 10:37:48 PM
Old 03-27-2008
Data if match found go to a particular line in perl
Hello Experts,

I am newbie to perl, just curious to know how to do the following in perl.
suppose I ve a txt file like below. when it founds "*Main Start"
Then go to "*Main End,,,,,,,," patteren and just collect the number from the previous line of "*Main End,,,,,,," pattern . In my case it is 5 . Then start excuting normally from the "*Main Start" position

Following is the picture .. I dont want to create any temp file also..
Input file:
Code:
*Init End
*Main Start
*Comment Reset Timers
000000,0000,0,0,0,0,0,1,0
000000,0000,0,0,0,0,1,1,0 
*Comment Control Frame at 1.04596 ms
000000,0400,0,0,0,0,1,0,1
2418A4,0000,0,1,3,0,0,0,0 
049C00,0000,0,0,2,0,0,0,0
*Comment Control Frame at 1.04673 ms
*Comment Control Frame at
000002,0000,0,0,0,0,1,0,1
241002,0000,0,1,3,0,0,0,0
000100,0000,0,0,2,0,0,0,0
*Comment Control Frame at
000004,0000,0,0,0,0,1,0,1
241002,0000,0,1,3,0,0,0,0
000000,0000,0,0,2,0,0,0,0
*Comment Frame 13 at ** us,,,,,,,,
000005,7E3D,0,0,0,0,1,0,1
*Main End,,,,,,,,

output:
Code:
*Init End
*Main Start
 repeat(5);
process all lines as usual here.

............
*Main End,,,,,,,,,

I ve to print all lines as it is when it found a line starting with * . Thats why I am doing like below
Code:
 if(m/^\*/){
              print "//", $_;
              next;
    }

Code:
Basic Algorithm of my programme need :
1. If "*Main Start" pattern found go to line where Pattern matches "*Main end".
2. Get the previous line. and get the value of the first field.
3. Return to "*Main start" position again. & Print repeat(that number) : in my case it is 5 :
4. stop/next;

Any help most appriciated..

regards,
user_prady
Last edited by user_prady; 03-28-2008 at 01:51 AM..
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl: Match a line with multiple search patterns

Hi I'm not very good with the serach patterns and I'd need a sample how to find a line that has multiple patterns. Say I want to find a line that has "abd", "123" and "QWERTY" and there can be any characters or numbers between the serach patterns, I have a file that has thousands of lines and... (10 Replies)
Discussion started by: Juha
10 Replies

2. Shell Programming and Scripting

help with script to send email and if subject line match is found

Help with script that will check log, then find a match is found, add that as the subject line. 1. The script will always run as a deamon.. and scan the event.log file 2. when a new 101 line is added to the event.log file, have the script check position 5,6 and 7 which is the job name, which... (2 Replies)
Discussion started by: axdelg
2 Replies

3. UNIX for Dummies Questions & Answers

awk display the match and 2 lines after the match is found.

Hello, can someone help me how to find a word and 2 lines after it and then send the output to another file. For example, here is myfile1.txt. I want to search for "Error" and 2 lines below it and send it to myfile2.txt I tried with grep -A but it's not supported on my system. I tried with awk,... (4 Replies)
Discussion started by: eurouno
4 Replies

4. UNIX for Dummies Questions & Answers

Display n lines after match found and other line

I have a file like this DoctorName Address1 Address2 DOB InsuredName Address1 Address2 DOB PatientName Address1 Address2 DOB ClaimNo1 DoctorName Address1 Address2 DOB InsuredName (2 Replies)
Discussion started by: nsuresh316
2 Replies

5. Shell Programming and Scripting

Displaying text till pattern match found in a line

Hi All, From the below line if we want to display all the text till found pattern dot/. I was trying with the below code but couldn't able to print text before the pattern. it display texts which is found after pattern. awk '/assed/{print;getline;print}' file_name | sed 's/^*. *//' input... (4 Replies)
Discussion started by: Optimus81
4 Replies

6. Shell Programming and Scripting

How to print the entire line if the mentioned match is found?

Hello Everyone, I have a file with 5 fields in each line just like mentioned below. Also the 4th field is time elapsed(hh:mm:ss) since the process is running xyz abc status 23:00:00 idle abc def status 24:00:00 idle def gji status 27:00:02 idle fgh gty status 00:00:00 idle Here I... (8 Replies)
Discussion started by: rahul2662
8 Replies

7. Shell Programming and Scripting

Perl removing line match with pattern in column

Hi, I have log like this: ... (1 Reply)
Discussion started by: justbow
1 Replies

8. Shell Programming and Scripting

Perl removing line match with pattern in column

Hi, I have log like this: ... (1 Reply)
Discussion started by: justbow
1 Replies

9. Shell Programming and Scripting

Add comment on last line if found match

Hi All, totally new on it , normally use it for just 1 line. i'm looking for help. i'm have 2 file. file 1 : -------------------------------------------------- c12 c1 c3 -------------------------------------------------- file 2: other content ... (10 Replies)
Discussion started by: kttan
10 Replies

10. UNIX for Beginners Questions & Answers

Modify text file if found multiple pattern match for every line.

Looking for help, i have input file like below and want to modify to expected output, if can without create additional file, hope can direct modify it. have 2 thing need do. 1st is adding a word (testplan generation off) after ! ! IPG: Tue Aug 07 14:31:17 2018 2nd is adding... (16 Replies)
Discussion started by: kttan
16 Replies

LEARN ABOUT CENTOS

ppix::regexp::structure::main

PPIx::Regexp::Structure::Main(3)			User Contributed Perl Documentation			  PPIx::Regexp::Structure::Main(3)

NAME

       PPIx::Regexp::Structure::Main - Represent a regular expression proper, or a substitution

SYNOPSIS

	use PPIx::Regexp::Dumper;
	PPIx::Regexp::Dumper->new( 'qr{foo}smx' )
	    ->print();

INHERITANCE

       "PPIx::Regexp::Structure::Main" is a PPIx::Regexp::Structure.

       "PPIx::Regexp::Structure::Main" is the parent of PPIx::Regexp::Structure::Regexp and PPIx::Regexp::Structure::Replacement.

DESCRIPTION

       This abstract class represents one of the top-level structures in the expression. Both PPIx::Regexp::Structure::Regexp and
       PPIx::Regexp::Structure::Replacement are derived from it.

METHODS

       This class provides the following public methods. Methods not documented here are private, and unsupported in the sense that the author
       reserves the right to change or remove them without notice.

   delimiters
       This method returns a string representing the delimiters of a regular expression or substitution string. In the case of something like
       "s/foo/bar/", it will return '//' for both the regular expression and the replacement.

   interpolates
       This method returns true if the regular expression or replacement interpolates, and false otherwise. All it really does is to check whether
       the ending delimiter is a single quote.

SUPPORT

       Support is by the author. Please file bug reports at <http://rt.cpan.org>, or in electronic mail to the author.

AUTHOR

       Thomas R. Wyant, III wyant at cpan dot org

COPYRIGHT AND LICENSE

       Copyright (C) 2009-2013 by Thomas R. Wyant, III

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl 5.10.0. For more details, see the full
       text of the licenses in the directory LICENSES.

       This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of
       merchantability or fitness for a particular purpose.

perl v5.16.3							    2014-06-10					  PPIx::Regexp::Structure::Main(3)
All times are GMT -4. The time now is 07:06 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy