Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

if match found go to a particular line in perl

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting if match found go to a particular line in perl
Prev   Next
# 1  
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..
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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
Login or Register to Ask a Question