You seem to assume the mapping between filenames and i-node
numbers is a 1-1 mapping. It isn't. While each filename has
one i-node number, more than one filename can have the same
i-node number - this is called "links". If you do
ln old new
you create a new filename
new, but it will have
the same i-node number as
old. Furthermore, it's
also possible that you have a file (and hence an i-node number),
without a file name. That happens for instance in the following
code:
my $file = "/tmp/whatever";
open my $fh => "> $file" or die;
unlink $file or die;
The file still exists (and you can write to it), it uses an
i-node, but there's no directory with an entry, and hence there's
no file name for it.
Abigail
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