[Bug 15466] 'realpath -- /tmp' non-compliant with upcoming POSIX

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=15466

--- Comment #2 from Eric Blake <eblake at redhat.com> ---
Created attachment 9561
  --> https://bugs.busybox.net/attachment.cgi?id=9561&action=edit
readlink: Support --, -n always

Ugh - unlike many open-source projects, your mailing list does not allow
moderated posting from non-subscribers. So while I wait for my subscription
request to be processed, I'm attaching a partial proposed patch for readlink.

Originally, I thought to do a one-liner to use single_argv(); then realized
that it was easier to blindly support -n in all configurations since POSIX will
require -n support.  I'm still trying to learn whether POSIX or GNU Coreutils
will prevail on whether readlink should be silent or verbose by default.

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