To do some alert testing I needed to create a very large file on windows, so I wrote a little perl script to do it. This script works fine on my desktop with ActivePerl 5.8.8. I put it on the servers I need to test with Perl 5.6.1 and it doesn't work at all. Can anyone suggest why? 
# Script create_big_file.pl
#
# Generates a file 10gb in size. Use -s to change the size.
#
use Getopt::Std;

my $usage = <<EOT;
Usage: $0 [-h] [-f file] [-s size]
    -h    This help screen.
    -f file    The file to create.
    -s size    Size of the file to create in GB.
    Example: create_big_file.bat -s 26 -f 26gb.dat
EOT

warn($usage), exit(0) if !getopts('hf:s:',\%OPT) or $OPT{'h'};

$filesize = 10000000000;
if ($OPT{'s'}) {
    $filesize = $OPT{'s'} * 1000000000 ;
}
$filename = "oat_bigfile_1.dat";
if ( $OPT{'f'}) {
    $filename = $OPT{'f'};
} 
$size = $filesize -1;

print STDOUT "Creating $filename of $filesize bytes.\n";
open(BIGFILE, "+>", "$filename") || die ("Could not create $filename.\
+n");
binmode BIGFILE;
die("Could not extend $filename to $filesize bytes.\n") unless seek BI
+GFILE, $size, 0;
print BIGFILE "\0";
seek BIGFILE, 0, 0;
close BIGFILE;

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In reply to Pre-extend a file on Windows by kenth

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