1## ----------------------------------------------------------------------- 2## 3## Copyright 2007-2009 H. Peter Anvin - All Rights Reserved 4## Copyright 2009 Intel Corporation; author: H. Peter Anvin 5## 6## This program is free software; you can redistribute it and/or modify 7## it under the terms of the GNU General Public License as published by 8## the Free Software Foundation, Inc., 53 Temple Place Ste 330, 9## Boston MA 02111-1307, USA; either version 2 of the License, or 10## (at your option) any later version; incorporated herein by reference. 11## 12## ----------------------------------------------------------------------- 13 14## 15## checksize.pl 16## 17## Check the size of a binary file and pad it with zeroes to that size 18## 19 20use bytes; 21 22($file, $maxsize, $padsize) = @ARGV; 23 24if (!defined($maxsize)) { 25 # Defaults based on the filename 26 if ($file =~ /^mbr[^0-9a-z]/) { 27 $maxsize = $padsize = 440; 28 } elsif ($file =~ /^gptmbr[^0-9a-z]/) { 29 $maxsize = $padsize = 440; 30 } elsif ($file =~ /^isohdp[fp]x[^0-9a-z]/) { 31 $maxsize = $padsize = 432; 32 } elsif ($file =~ /^altmbr[^0-9a-z]/) { 33 $maxsize = $padsize = 439; 34 } else { 35 die "$0: no default size for filename: $file\n"; 36 } 37} 38 39$padsize = $maxsize unless(defined($padsize)); 40 41open(FILE, '+<', $file) or die; 42@st = stat(FILE); 43if (!defined($size = $st[7])) { 44 die "$0: $file: $!\n"; 45} 46if ($size > $maxsize) { 47 print STDERR "$file: too big ($size > $maxsize)\n"; 48 exit 1; 49} elsif ($size < $padsize) { 50 seek(FILE, $size, 0); 51 print FILE "\0" x ($padsize-$size); 52} 53 54exit 0; 55