Shell Programming and Scripting

Alrighty, I'm trying to get a perl script going to search through a bunch of files for me and compile it to a single location. I am currently having troubles on just getting the grep to work.

Here is what I currently have:

Code:

#!/usr/bin/perl
open (LOG, "errors.txt") or die
 ("Unable to open error.txt");
@errors=<LOG>;
close(LOG);
$errors2 = grep Error,@errors;
foreach ($errors2)
{
chomp($_);
print "$_";
print "\n";
}

Here is the current output:

Code:

$ ./perl.sh
7
$

Here is the contents of errors.txt

Code:

$ more errors.txt
Error1
Error2
Error3
Makeshift Error
Makeshift
Pluto
jerror

For some reason it's doing a line count. Which is my next thing I wanted to do with it. I want to line count the results to see to even write them, or just skip over writing that section of my perl script.

I'm not too sure if I'm making much sense right now, but I'm just trying re-relearn perl. More of a brush up.

I've tried:

Code:

 
open (LOG, "errors.txt") or die
 ("Unable to open error.txt");
@errors=<LOG>;
close(LOG);
$errors2 = `grep Error errors.txt`;
foreach ($errors2)
{
chomp($_);
print "$_";
print "\n";
}

Which works fine as well. Then when I try to line count $errors2, it wants to line count the file Error1, Error2, etc.

But when I try to

Code:

$errors2 = `grep Error @errors`;

it tries to grep for the word Error in file Error1,Error2,etc. So that doesn't work either.


Any chance another set of eyes could see what I am doing wrong? Thank you for your time. I greatly appriciate it.

You made a minor mistake here ,

You tried to assign the result of the grep to the scalar ( $errors2) . Because of it it you get the count of the occurrence . Just change that as an array.

Code:

#!/usr/bin/perl

use strict;
use warnings;

open (LOG, "errors.txt") or die ("Unable to open error.txt");
my @errors=<LOG>;
close(LOG);
my @errors2 = grep /Error/,@errors;
foreach (@errors2)
{
chomp($_);
print "$_";
print "\n";
}

Thank you so much!

Could you breifly explain the purpose of the forward slashes around the Error so I may better understand?

Code:

my @errors2 = grep /Error/,@errors;