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## -----------------------------------------------------------------------
##
## Copyright 2007-2009 H. Peter Anvin - All Rights Reserved
## Copyright 2009 Intel Corporation; author: H. Peter Anvin
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, Inc., 53 Temple Place Ste 330,
## Boston MA 02111-1307, USA; either version 2 of the License, or
## (at your option) any later version; incorporated herein by reference.
##
## -----------------------------------------------------------------------
##
## checksize.pl
##
## Check the size of a binary file and pad it with zeroes to that size
##
use bytes;
($file, $maxsize, $padsize) = @ARGV;
if (!defined($maxsize)) {
# Defaults based on the filename
if ($file =~ /^mbr[^0-9a-z]/) {
$maxsize = $padsize = 440;
} elsif ($file =~ /^gptmbr[^0-9a-z]/) {
$maxsize = $padsize = 424;
} elsif ($file =~ /^isohdpfx[^0-9a-z]/) {
$maxsize = $padsize = 432;
} elsif ($file =~ /^altmbr[^0-9a-z]/) {
$maxsize = 439; $padsize = 440;
} else {
die "$0: no default size for filename: $file\n";
}
}
$padsize = $maxsize unless(defined($padsize));
open(FILE, '+<', $file) or die;
@st = stat(FILE);
if (!defined($size = $st[7])) {
die "$0: $file: $!\n";
}
if ($size > $maxsize) {
print STDERR "$file: too big ($size > $maxsize)\n";
exit 1;
} elsif ($size < $padsize) {
seek(FILE, $size, 0);
print FILE "\0" x ($padsize-$size);
}
exit 0;
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