From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Kevin Hao" <haokexin@gmail.com>
Subject: Re: How Linux /proc filesystem convert a fd to the actual pathname?
Date: Tue, 21 Aug 2007 14:03:58 +0800
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To: "Xin Zhao" <uszhaoxin@gmail.com>
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> I am curious how Linux convert an fd to the pathname?  Does it
> recursively walk back from current dentry to the root?
Using d_path.
> Can someone point me to the right place in the kernel where this
> functionality is implemented?
do_proc_readlink may be the function you want.