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Date:      Tue, 4 Dec 2018 09:11:07 -0800 (PST)
From:      "Rodney W. Grimes" <freebsd@pdx.rh.CN85.dnsmgr.net>
To:        Yuri Pankov <yuripv@freebsd.org>
Cc:        Alexey Dokuchaev <danfe@freebsd.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: svn commit: r341446 - head/release/amd64
Message-ID:  <201812041711.wB4HB7Fc037202@pdx.rh.CN85.dnsmgr.net>
In-Reply-To: <05039715-2792-fdb2-735f-c5842f4d8087@FreeBSD.org>

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> Alexey Dokuchaev wrote:
> > On Mon, Dec 03, 2018 at 10:31:57PM +0000, Yuri Pankov wrote:
> >> New Revision: 341446
> >> URL: https://svnweb.freebsd.org/changeset/base/341446
> >>
> >> Log:
> >>   mkisoimages.sh: don't use -p flag when copying loader.efi to msdosfs.
> >>   
> >>   This fixes 'cdrom' target in the case when world was built by user,
> >>   and not root.
> > 
> > Could you please explain why -p should not have been used here?  I fail
> > to understand this from the commit log.  I've always considered preserving
> > various file metadata as a good thing to do, and this commit puzzles me.
> 
> Because the target is on msdosfs, and the only metadata that can be
> preserved is modification time which isn't that useful with the file
> being hidden in ESP.  OTOH, 'cp -p' fails trying to preserve owner/group
> if source is not owned by root (as commit message says).  Additional
> 'chmod' call done in HBSD doesn't do much as well -- it seems we can
> only set/unset owner's 'write' flag which corresponds to DOS 'readonly'
> attribute.
> 

I agree with this assesment, and the present state of the script,
besides cp followed by chmod is usually spelled ${INSTALL}.


-- 
Rod Grimes                                                 rgrimes@freebsd.org



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