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Top Forums Shell Programming and Scripting Want to extract certain lines from big file Post 302965023 by mad man on Friday 22nd of January 2016 10:25:54 AM
Old 01-22-2016
Want to extract certain lines from big file

Hi All,

I am trying to get some lines from a file i did it with while-do-loop. since the files are huge it is taking much time. now i want to make it faster.

The requirement is the file will be having 1 million lines.
The format is like below.
Code:
##transaction, , , ,blah, blah
%%blah~trannum~blah~blah~blah
0000content01
0001content02
.
.
0010contentnn
0000EOT
##transaction, , , ,blah, blah
%%blah~trannum~blah~blah~blah
0000content01
0001content02
.
.
0010contentnn
0000EOT
##transaction, , , ,blah, blah
%%blah~transnum~blah~blah~blah
0000content01
0001content02
.
.
0010contentnn
0000EOT

What i know from the file is transnum in a set. I want to copy the ##transaction to till the next EOT for the particular transnum.
Also my requirement is from that file i want to copy only one set because my process will know only one transnum only.
So my output file will have only 10 to 15 lines (Only 1 transaction)
So please help me thanks.

Last edited by vbe; 01-22-2016 at 11:58 AM.. Reason: code tags please!
 

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Msgcat(3pm)						User Contributed Perl Documentation					       Msgcat(3pm)

NAME
Locale::Msgcat - Perl extension for blah blah blah SYNOPSIS
use Locale::Msgcat; $cat = new Locale::Msgcat; $rc = $cat->catopen(name, oflag); $msg = $cat->catgets(set_number, message_number, string); $rc = $cat->catclose(); DESCRIPTION
The Locale::Msgcat module allows access to the message catalog functions which are available on some systems. A new Locale::Msgcat object must first be created for each catalog which has to be open at a given time. The catopen operation opens the catalog whose name is given as argument. The oflag can be either 0 or NL_CAT_LOCALE (usually 1) which is the recommended value. The catgets message retrieves message_number for the set_number message set, and if not found returns string. The catclose function should be used when access to a catalog is not needed anymore. EXAMPLES
use Locale::Msgcat; $cat = new Locale::Msgcat; unless ($cat->catopen("whois.cat", 1)) { print STDERR "Can't open whois catalog. "; exit(1); } printf "First message, first set : %s ", $cat->catgets(1, 1, "not found"); unless ($cat->catclose()) { print STDERR "Can't close whois catalog. "; exit(1); } The above example would print the first message from the first message set found in the whois catalog, or if not found it would print "not found". AUTHOR
Christophe Wolfhugel, wolf@pasteur.fr SEE ALSO
catopen(3), catclose(3), catgets(3), perl(1). perl v5.14.2 1999-11-15 Msgcat(3pm)
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