People seem to have missed that you are looking for "2-line strings". Reading and matching one line at a time won't succeed.

You need to maintain a rolling two-line buffer to do this. 

...## get $fh from somewhere (eg.open)
my $last = '';
while( <$fh> ) {
    ( $last . $_ ) =~ m[cpuinfo\nvendor_id\s+:\s(.*?)\n] 
        and print qq[CPU:$1] and last; 
    $last = $_;
}
...

[download]

Or as a (longish) one-liner 

perl -ne"($last.$_)=~m[cpuinfo\nvendor_id\s+:\s(.*?)\n]&&print qq[CPU:
+$1]&&exit;$last=$_" yourfile

[download]
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In reply to Re: Grepping with Perl: How to stop after first match? by BrowserUk
in thread Grepping with Perl: How to stop after first match? by paulnovl

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