#!/usr/bin/perl
#use strict;
use warnings;
sub search_pattern
{
my $file_name = $_[0];
my $search = $_[1];
open(LOGFILE, $_[0]) or die("Error: cannot open file '$_[0]'\n");
while (<LOGFILE>)
{
if ( $_ =~ /$search/ ) {
my $val = $`; #Matches Everything after pattern
$val =~ s/^\s+//; #remove leading spaces
$val =~ s/\s+$//; #remove trailing spaces
$val =~ s/\D//g; #Just has the digits. All other charcters are filtered.
#print "$val\n";
print "\nFirst Occurence:$val \n";
my $line = $.;
print "Line number:$line\n";
#$temp = $line;
#print "$temp";
#print "$.";
last;
}
}
}
my $file_n ="test.txt";
my $search_p = "This is phrase 2";
&search_pattern($file_n, $search_p);
OUTPUT
------
First Occurence:90
Line number:3
Hi guys,
My code above searches for the first occurence of a phrase and returns the line number...
What if i wanna search for multiple search phrases in a single file and return the line numbers.
For example:
test.txt
1.This is phrase 1
2.This is phrase 3
3.This is phrase 2
4.This is phrase 3
any text in between
5.This is phrase 5
any text in between
6.This is phrase 4
7.This is phrase 1
8.This is phrase 2
9.This is phrase 3
10.This is phrase 6
11.This is phrase 7
12.This is phrase 1
13.This is phrase 2
14.This is phrase 3
15.This is phrase 4
16.This is phrase 8
17.This is phrase 1
.................
.................
i have given the line numbers for my reference in reality, it is not present...
The arguments passed are file_name and Search phrases (for eg: this is phrase1, this is phrase 2, This Phrase 3, phrase 5...)
The number of arguments passed may vary... But the first argument is always the file_name.
first it will check for phrase 1 and then from that line number phrase 2 (even though in our case Phrase 3 come in between phrase 2 ie., line 2 we need phrase 2 first and then phrase 3) and then phrase 3 and return phrase 3.
lets say we have 4 arguments including file name...
if (phrase 1 exists) ---------- if (phrase 1 doesnt exists)
from that line number ----------- search for phrase 2
search for phrase 2 ---------- if (phrase 2 also doesnt exists)
from that line number ---------- search for phrase 2 and return phrase 3
---------if \(phrase 3 also doesnt exists\)
----------- return phrase 2
----------- else phrase 1
search for phrase 3 ----------- if none of them exists display a message
return the phrase 3
the reason iam keeping track of line number is so that the file is not parsed from line 1.
if i know the number of arguments passed then its fine...
But the thing is what if i dont know the number of arguments presents.
can anybody suggest how do i proceed for this problem.