portable realpath

[Eric]

On Tue, 13 Dec 2011, Antonio Sun wrote:

> Anyone knows a portable way to get realpath, ie, the canonical file name of
> a symbolic link?
>
> Both GNU Linux and NetBSD seem to support 'readlink -f', but the '-f' will
> fail in FreeBSD, v8.2-RELEASE-p4 at least.
>
> Any suggestions?
>
> PS. 'readlink -f', will canonicalize by  following  every symlink in every
> component of the given name recursively.

What about:

   perl -le 'use Cwd; print Cwd::realpath("tmp")'

What is happening on FreeBSD, v8.2-RELEASE-p4, with 'readlink -f'?


-- 
Eric.
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