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Date: Wed, 19 Sep 2007 12:34:22 -0700
From: Marcus Reid <marcus@blazingdot.com>
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Subject: Portsnap serving up bad snapshots?
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Hi,

I've tried this on a couple of different machines a few times over
the last couple of days, and keep getting the same results.  Starting
with an empty /var/db/portsnap :

  [root@austin /var/db]# portsnap fetch
  Looking up portsnap.FreeBSD.org mirrors... 4 mirrors found.
  Fetching public key from portsnap3.freebsd.org... done.
  Fetching snapshot tag from portsnap3.freebsd.org... done.
  Fetching snapshot metadata... done.
  Fetching snapshot generated at Tue Sep 18 17:22:37 PDT 2007:
  1d76db54d472a78981f30c134f34eea49141d183d48127100% of   49 MB   90 kBps 00m00s
  Extracting snapshot... done.
  Verifying snapshot integrity... gunzip: snap/2bafbd0d8edc7a7cfa7e19833986ae4032f82006fd0d65cba9c4a75b432b5c8e.gz: unexpected end of file
  gunzip: snap/2bafbd0d8edc7a7cfa7e19833986ae4032f82006fd0d65cba9c4a75b432b5c8e.gz: uncompress failed
  snapshot corrupt.

While it's downloading the big .tgz file, I've hardlinked it
to a different filename so that I still have a copy left over
to see what's wrong with it after portsnap deletes the original.

  [root@austin /var/db/portsnap]# ls -l *.bak
  -rw-r--r--  2 root  wheel  52085075 Sep 18 17:57 1d76db54d472a78981f30c134f34eea49141d183d481275cb44faae00dc65bdc.tgz.bak
  [root@austin /var/db/portsnap]# gunzip -t 1d76db54d472a78981f30c134f34eea49141d183d481275cb44faae00dc65bdc.tgz.bak
  [root@austin /var/db/portsnap]# echo $?
  0

The sha256 of the file and the filename don't line up:

  [root@austin /var/db/portsnap]# sha256 1d76db54d472a78981f30c134f34eea49141d183d481275cb44faae00dc65bdc.tgz.bak
  SHA256 (1d76db54d472a78981f30c134f34eea49141d183d481275cb44faae00dc65bdc.tgz.bak) = b8fa376bb2f878f36bf46ebdba2fe267c945c67e6d3085d580adb52b5692b8e4
  [root@austin /var/db/portsnap]# 

Some files in the archive are valid, but many seem to be
truncated.  Is there a big problem with portsnap right now?

Thanks,

Marcus