but that doesn't work for ram file handles.
is not  fileno ($mem) == -1 the right way to tell if an handle is opened onto a memory file? and reliably be sure that is an handle anyway? The only minus is that for memory filehandle we cant be sure they point to the same point because they all returns -1. 
# real file
perl -Mstrict -wE "open my $fh,'<','out.log' or die;say fileno($fh) ? 
+'FileHandle! '.fileno($fh):'NA'"
FileHandle! 3

# memory file
perl -Mstrict -wE "open my $fh,'<',\my $mem or die;say fileno($fh) ? '
+FileHandle! '.fileno($fh):'NA'"
FileHandle! -1

# not existing file, closed filehandles, aliens things..
perl -Mstrict -wE "open my $fh,'<','out.logXX';say fileno($fh) ? 'File
+Handle! '.fileno($fh):'NA'"
NA

[download]
so you dont need tell to tell!

L*
There are no rules, there are no thumbs..
Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.

In reply to Re^2: check scalar holds filehandle by Discipulus
in thread check scalar holds filehandle by bagyi

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