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#!/usr/bin/perl
open(SIG, $ARGV[0]) || die "open $ARGV[0]: $!";
$n = sysread(SIG, $buf, 1000);
if($n > 510){
print STDERR "boot block too large: $n bytes (max 510)\n";
exit 1;
}
print STDERR "boot block is $n bytes (max 510)\n";
$buf .= "\0" x (510-$n);
$buf .= "\x55\xAA";
open(SIG, ">$ARGV[0]") || die "open >$ARGV[0]: $!";
print SIG $buf;
close SIG;
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