Re: bin/54467: new tar overwrites symlinks to directories

[Joerg Sonnenberger <joerg%bec.de@localhost>]

On Sat, Aug 17, 2019 at 08:30:02PM +0000, Martin Husemann wrote:
>  On Sat, Aug 17, 2019 at 07:50:02PM +0000, Joerg Sonnenberger wrote:
>  >  On Thu, Aug 15, 2019 at 04:25:00PM +0000, martin%NetBSD.org@localhost wrote:
>  >  > The new tar(1) is overeager in restoring directories if those already exist
>  >  > as a symlink to another directory.
>  >  
>  >  That's how it should behave. Seems like a bug in pax-as-tar if nothing
>  >  else.
>  
>  It should be overridable by some option, at least.

It can be, -P covers it. I strongly believe that sysinst should not be
setting it though.

>  >  > This kills updates on machines that have /usr as a symlink to someplace else
>  >  > with our base.tgz containing
>  >  > 
>  >  > 	 drwxr-xr-x  0 root   wheel        0 Jul 14 16:36 ./usr
>  >  
>  >  This sounds like it is asking for trouble to me. Why would you ever want
>  >  to make /usr a symlink?!
>  
>  Why not?

Because it messes up physical vs logical path. Even a null mount would
be better.

Joerg