Perl: Printing Multiple Lines after pattern match Post: 302333253

Sponsored Content

Top Forums Shell Programming and Scripting Perl: Printing Multiple Lines after pattern match Post 302333253 by Deep9000 on Saturday 11th of July 2009 11:38:06 PM

07-12-2009

Registered User

Perl: Printing Multiple Lines after pattern match

[SIZE=2][SIZE=2]Hello People,
Need some assistance/guidance.
OUTLINE:
Two files (File1 and File2)
File1 has some ids such as
009463_3922_1827
897654_8764_5432
File2 has things along the lines of:
Query= 009463_3922_1827 length=252
(252 letters)

More stufff here

Query= 009525_3967_2963 length=249 uaccno=FIFOXZ216JYL81
(249 letters)
AND MORE STUFF HERE
-----------
PROBLEM:
Capture/finding the Ids stored in File1 from file2 is trivial.
What I need to capture "also" is the remaining part.
For example:
This part of the code gives me the line when it has found the match: Query= 009463_3922_1827 length=252 uaccno=FIFOXZ216JUM5H
while ($line2=<INFILE2>)
{

if ($line2 =~ /$line1/)
{
print $line2;
}

Now how can I get to the other lines below this (Query= 009463_3922_1827 length=252 uaccno=FIFOXZ216JUM5H) line.
For example, everything until
Query= 009525_3967_2963 length=249 uaccno=FIFOXZ216JYL81
(249 letters)
>>>>>>>>>>>>>>>
a) Few ideas I can think of is using SEEK/tell.
Will this be a efficient way, how much to SEEK, the while loop is reading one line at a time so, some how buffer everything until see the pattern as Query=.....
How to find the bytes until then?

b) Using read()
How to find the number of byes after the pattern match?

c)Using the metacharacters to read ahead after the pattern match /ID (?=SOMETHING)/
Tried this but with until, but its not working. May be my regex is incorrect.

If any one can just be a push in the write direction--pseudocode etc. it would be much appreciated.

I am not reading the files or going to use array (copying the contents of a file to an array) as the files are big.

Last edited by Deep9000; 07-17-2009 at 09:57 AM..

Deep9000

View Public Profile for Deep9000

Find all posts by Deep9000

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Concatenating multiple lines to one line if match pattern

Hi all, I've been working on a script which I have hit a road block now. I have written a script using sed to extract the below data and pumped into another file: Severity............: MAJORWARNING Summary: System temperature is out of normal range. Severity............: MAJORWARNING...

2. Shell Programming and Scripting

read and match multiple lines in perl

Could any one tell me how to read and match multiple lines in perl? Did this code below still work in this situation? while (<FILE>) { if (/ /) { } } Thanks a lot!

3. Shell Programming and Scripting

Perl script to match a pattern and print lines

Hi I have a file (say 'file1')and I want to search for a first occurence of pattern (say 'ERROR') and print ten lines in the file below pattern. I have to code it in PERL and I am using Solaris 5.9. I appreciate any help with code Thanks Ammu

4. Shell Programming and Scripting

shell script: grep multiple lines after pattern match

I have sql file containing lot of queries on different database table. I have to filter specific table queries. Let say i need all queries of test1,test2,test3 along with four lines above it and sql queries can be multi lines or in single line. Input file contains. set INSERT_ID=1; set...

5. Shell Programming and Scripting

Sed/awk/perl command to replace pattern in multiple lines

Hi I know sed and awk has options to give range of line numbers, but I need to replace pattern in specific lines Something like sed -e '1s,14s,26s/pattern/new pattern/' file name Can somebody help me in this.... I am fine with see/awk/perl Thank you in advance

6. Shell Programming and Scripting

Printing next 6 lines from of pattern match

Hi, i have a big file having many opcodes. if (opcode="01110000000100000000" ) then --fadd result.opcode := "01110000000100000000"; result.s0 := '1'; result.s1 := '1'; result.s2 := '0'; result.inst := '0'; result.scalar := '1';...

7. Shell Programming and Scripting

Sed: printing lines AFTER pattern matching EXCLUDING the line containing the pattern

'Hi I'm using the following code to extract the lines(and redirect them to a txt file) after the pattern match. But the output is inclusive of the line with pattern match. Which option is to be used to exclude the line containing the pattern? sed -n '/Conn.*User/,$p' > consumers.txt

8. Shell Programming and Scripting

Match Pattern and print pattern and multiple lines into one line

Hello Experts , require help . See below output: File inputs ------------------------------------------ Server Host = mike id rl images allocated last updated density vimages expiration last read <------- STATUS ------->...

9. Shell Programming and Scripting

Remove multiple lines that match pattern

Not sure how I can accomplish this. I would like to remove all interfaces that have the commands I would like to see: switchport port-security, spanning-tree portfast. One line is no problem. interface FastEthernet0/8 spanning-tree portfast interface FastEthernet0/9 spanning-tree...

10. Shell Programming and Scripting

Removing multiple lines from input file, if multiple lines match a pattern.

GM, I have an issue at work, which requires a simple solution. But, after multiple attempts, I have not been able to hit on the code needed. I am assuming that sed, awk or even perl could do what I need. I have an application that adds extra blank page feeds, for multiple reports, when...

LEARN ABOUT DEBIAN

split

SPLIT(1)							   User Commands							  SPLIT(1)

NAME

       split - split a file into pieces

SYNOPSIS

       split [OPTION]... [INPUT [PREFIX]]

DESCRIPTION

       Output  fixed-size  pieces  of  INPUT to PREFIXaa, PREFIXab, ...; default size is 1000 lines, and default PREFIX is `x'.  With no INPUT, or
       when INPUT is -, read standard input.

       Mandatory arguments to long options are mandatory for short options too.

       -a, --suffix-length=N
	      use suffixes of length N (default 2)

       -b, --bytes=SIZE
	      put SIZE bytes per output file

       -C, --line-bytes=SIZE
	      put at most SIZE bytes of lines per output file

       -d, --numeric-suffixes
	      use numeric suffixes instead of alphabetic

       -e, --elide-empty-files
	      do not generate empty output files with `-n'

       --filter=COMMAND
	      write to shell COMMAND; file name is $FILE

       -l, --lines=NUMBER
	      put NUMBER lines per output file

       -n, --number=CHUNKS
	      generate CHUNKS output files.  See below

       -u, --unbuffered
	      immediately copy input to output with `-n r/...'

       --verbose
	      print a diagnostic just before each output file is opened

       --help display this help and exit

       --version
	      output version information and exit

       SIZE may be (or may be an integer optionally followed by) one of following: KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T,
       P, E, Z, Y.

       CHUNKS  may  be:  N	  split  into  N files based on size of input K/N     output Kth of N to stdout l/N	split into N files without
       splitting lines l/K/N   output Kth of N to stdout without splitting lines r/N	 like `l' but use round robin distribution  r/K/N    like-
       wise but only output Kth of N to stdout

AUTHOR

       Written by Torbjorn Granlund and Richard M. Stallman.

REPORTING BUGS

       Report split bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report split translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2011 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The  full  documentation  for split is maintained as a Texinfo manual.  If the info and split programs are properly installed at your site,
       the command

	      info coreutils 'split invocation'

       should give you access to the complete manual.

GNU coreutils 8.12.197-032bb					  September 2011							  SPLIT(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Concatenating multiple lines to one line if match pattern

Discussion started by: phixsius

2. Shell Programming and Scripting

read and match multiple lines in perl

Discussion started by: zx1106

3. Shell Programming and Scripting

Perl script to match a pattern and print lines

Discussion started by: ammu

4. Shell Programming and Scripting

shell script: grep multiple lines after pattern match

Discussion started by: mirfan