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Date: Thu, 25 May 2023 01:52:55 -0600
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Subject: Re: inside /bin/tar: cannot change mode
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To: cygwin AT cygwin DOT com
References: <A666F534-16CB-47FE-A6A9-A9DFDE47E642 AT Denis-Excoffier DOT org>
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From: Brian Inglis via Cygwin <cygwin AT cygwin DOT com>
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On 2023-05-24 12:18, Denis Excoffier via Cygwin wrote:
> I have an error (about symlinks it seems) that i have never met in years: Cannot change mode.
> Apart from this message (and return code != 0), the ’tar extract’ is ok.
> % uname -a
> CYGWIN_NT-10.0-17763 {edited} 3.5.0-0.295.g3bee68248fc8.x86_64 2023-05-01 17:58 UTC x86_64 Cygwin
> % cd /tmp; rm -rf mytest mytest.tar
> % mkdir mytest
> % ln -s b mytest/a
> % /bin/tar cf /tmp/mytest.tar mytest
> % /bin/tar tvf /tmp/mytest.tar
> drwxr-xr-x {edited}/{edited} 0 2023-05-24 13:12 mytest/
> lrwxrwxrwx {edited}/{edited} 0 2023-05-24 13:12 mytest/a -> b
> % rm -rf mytest
> % /bin/tar xf /tmp/mytest.tar
> /bin/tar: mytest/a: Cannot change mode to rwxr-xr-x: Not a directory
> /bin/tar: Exiting with failure status due to previous errors
> % echo $status
> 2
> %
> /tmp is under ntfs filesystem, all packages are up to date (e.g. /bin/tar --version is 1.34).

I recently got this during a package update build, when it decided to tar a 
build directory, which contained only symlinks to files in the src directory, 
which the tar did not include, which would have created many dangling symlinks.

I fixed the issue by adding -h, --dereference to give chf and tar real files.

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

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