It prints 1 for me, as I expected. If you run the program below and it prints 1 for you as well, something you said is not true. Find out what, and you'll find your problem.

$dev_ref->{hostname} = '2383-RWAN-1';
$dev_ref->{grbr    } = '2383';

my $pattern = qr{HOSTNAME:\s*(?:\d{4}-)?$dev_ref->{hostname}\s+GRBR:\s
+*$dev_ref->{grbr}}i;

my $buffer = <<'__EOI__';
 9600/ARQ

                Some Company

---> Unauthorized use of this router is prohibited <---

*******************************************************
* Hostname: 2383-rwan-1                GRBR: 2383    *
* Model: Cisco 1234                                  *
* Location: Ansalon , DL                    *
*******************************************************

---> Unauthorized Access is strictly prohibited <---



User Access Verification

Username:
__EOI__

    my $hostname = $buffer =~ m/$pattern/i   ?  1 : 0 ;
print($hostname, "\n");

[download]

By the way, the i option on m/$pattern/i is useless, since it's already on for $pattern. Also, you should probably escape what you putt in from $dev_ref:
qr{HOSTNAME:\s*(?:\d{4}-)?\Q$dev_ref->{hostname}\E\s+GRBR:\s*\Q$dev_ref->{grbr}\E}i
Neither change would affect the result here, though.

In reply to Re: RegEx Confusion by ikegami
in thread RegEx Confusion by Argel

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