Date: Wed, 12 Feb 2020 12:50:19 +0100 From: Florian Weimer <fw@...eb.enyo.de> To: Paul Eggert <eggert@...ucla.edu> Cc: Rich Felker <dalias@...c.org>, Florian Weimer <fweimer@...hat.com>, Gnulib bugs <bug-gnulib@....org>, musl@...ts.openwall.com, 39236@...bugs.gnu.org Subject: Re: bug#39236: coreutils cp mishandles error return from lchmod * Paul Eggert: > On 1/22/20 2:05 PM, Rich Felker wrote: >> I think we're approaching a consensus that glibc should fix this too, >> so then it would just be gnulib matching the fix. > > I installed the attached patch to Gnulib in preparation for the upcoming > glibc fix. The patch causes fchmodat with AT_SYMLINK_NOFOLLOW to work on > non-symlinks, and similarly for lchmod on non-symlinks. The idea is to > avoid this sort of problem in the future, and to let Coreutils etc. work > on older platforms as if glibc 2.32 (or whatever) is already in place. The lchmod implementation based on /proc tickles an XFS bug: <https://sourceware.org/ml/libc-alpha/2020-02/msg00467.html>
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