You could adapt this:
#! perl -slw
use strict;
open I, '<:raw', $ARGV[0] or die $!;
my $regex = $ARGV[1] or die 'No search pattern supplied.';
my $o = 0;
my $buffer;
## Read into the buffer after any residual copied from the last chunk
while( my $read = read I, $buffer, 4096, pos( $buffer )||0 ) {
while( $buffer =~ m[$regex]gc ) {
## Print the offset, the matched text plus (following) context
print $o + $-[0], ':', substr $buffer, $-[0], 100;
}
## Slide the unsearched remainer to the front of the buffer.
substr( $buffer, 0, pos( $buffer ) ) = substr $buffer, pos( $buffe
+r );
$o += $read; ## track the overall offset.
}
close I;
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
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