Re: st_size of a symlink

From: Guillem Jover
Date: Mon Jul 23 2012 - 19:13:48 EST

On Tue, 2012-07-24 at 00:07:48 +0200, Richard Weinberger wrote:
> On 23.07.2012 22:47, Jesper Juhl wrote:
> >>Fix it _how_?
> >
> >By returning the size as the number of bytes in the name the link is
> >currently pointing at.
> This is not easy.
> procfs has no clue where the link pointing at.
> The information is generated while accessing the link.
> tmpfs on the other hand has this information because symlinks get
> only changed through tmpfs...

Well, can't the link be accessed when getting the stat information

> >> By retrying readlink() with bigger buffer.
> >>With procfs there's just a few more ways the readlink() output can
> >>change, that's all.
> >>
> >Still not a good reason to just return 0 IMHO.
> IMHO the lstat() and readlink() manpages have to be more precise
> about st_size.

They document what POSIX says:


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