After playing with this question for a while this morning I have discovered some strange behaviour that appears to be related to the CGI module on Win32. Basically it appears to break reading from STDIN. I'm very bad at explaining things so take a look at this code: 
#!/usr/bin/perl -w
use strict;
use CGI;
my $indir = <STDIN>;
chomp $indir;
my $dir = 'c:/temp';

print "Opening $dir\n";
opendir (DIR, $dir) || die "Could not open dir: $!";
my @array=readdir (DIR);
closedir (DIR);
print "$_\n" foreach @array;

print "Opening $indir\n";
opendir (INDIR, $indir) || die "Could not open dir: $!";
my @inarray=readdir (INDIR);
closedir (INDIR);
print "$_\n" foreach @inarray;

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This works fine on a Linux machine but dies during the $indir open in the second part on a Win32 machine, all the $dir bits work just fine. Poking at the CGI.pm I notice this little bit of code: 
if ($needs_binmode) {
    $CGI::DefaultClass->binmode(main::STDOUT);
    $CGI::DefaultClass->binmode(main::STDIN);
    $CGI::DefaultClass->binmode(main::STDERR);
}

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If I uncomment those then both opendirs work fine. Can anybody enlighten me as to why this is happening?

In reply to Win32 CGI breaks STDIN? by the_slycer

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