Why not just use the IO::Handle package?
Use the opened method. It will tell you if a file handle is opened and ready.
try the following code...
use strict;
use warnings;
use IO::Handle;
open my $fh, '>', 'file' or die $!;
test_fh($fh);
close $fh or die $!;
test_fh($fh);
sub test_fh {
my ($fh) = @_;
if ($fh->opened()) {
print "fh is opened and ready\n";
}
else {
print "fh is closed\n";
}
return;
}
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