Re: net/net-snmp build failure on 9.99.37

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

On Tue, 14 Jan 2020 at 15:43, Patrick Welche <prlw1%cam.ac.uk@localhost> wrote:
>
> On Tue, Jan 14, 2020 at 03:20:46PM +0000, Chavdar Ivanov wrote:
> > To complete the analysis, I tried to upgrade a 9.99.36 system to
> > 9.99.37 by booting off the ISO file I previously used for the clean
> > installation described above.
> >
> > It failed in a similar was as with sysupgrade :
> >
> > ls -l /sbin /bin /usr/sbin /usr/bin | egrep 'wheel[ \t]*0' | wc -l
> >       91
> > (the clean installation returns 0).
> >
> > It gets less clear after this... But at the moment I can't see how to
> > upgrade to 9.99.37.
>
> I just hit the same thing without using sysupgrade.
>
> Essentially tar built in I'm not sure which window can't unpack symlinks.
>
> On a couple of days old -current/amd64
>
> grab base.tar.xz
> tar -tzvf base.tar.xz | grep reboot        see that it's a symlink
> tar -xzpvf base.tar.xz -C /                see that /sbin/reboot is a zero
>                                                  length file
> cd / && pax -r -v -z -pe -f base.tar.xz    see that /sbin/reboot is fine
>
> Oddly - now repeat the tar, and also find that it is fine.
>
> So the work around seems to be "use pax". The surpise is that then tar is
> fixed.

And I find the following:
(on the system with many - 92 - zero length files in *bin directories):

nbuild# ls -l bin/test
-r-xr-xr-x  1 root  wheel  0 Jan 14 03:57 bin/test    #### test is zero length
nbuild# /bin/tar xopf ../base.tar.xz  ./bin                 ####
extracting the whole ./bin over *existing* directory
nbuild# ls -l bin/test
-r-xr-xr-x  1 root  wheel  0 Jan 14 03:57 bin/test   ##### test is
still zero length
nbuild# mv bin bin.old                                           #####
hiding the whole bin directory
nbuild# /bin/tar xopf ../base.tar.xz  ./bin
ksh: /bin/tar: not found
#####  me stoooopid
nbuild# /bin.old/tar xopf ../base.tar.xz  ./bin          #####
extracting in a fresh place
nbuild# ls -l bin/test
-r-xr-xr-x  2 root  wheel  18808 Jan 14 03:57 bin/test    ##### now test is ok.

So there is apparently some bsdtar bug here,

>
>
> Cheers,
>
> Patrick



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