From owner-freebsd-current@freebsd.org  Mon Aug 31 11:17:33 2015
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From: Willem Jan Withagen <wjw@digiware.nl>
Subject: Strange behaviour of getcwd for hidden ZFS snapshots.
Organization: Digiware Management b.v.
Message-ID: <55E437C2.5080609@digiware.nl>
Date: Mon, 31 Aug 2015 13:17:22 +0200
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Hi,

I was trying to restore some deleted files from a snapshot with rsync:

[/home/www/.zfs/snapshot/zfs-auto-snap_hourly-2015-08-31-12h00/www.tegenbosch28.nl] 

root@zfs.digiware.nl# rsync -rav * /tmp
rsync: getcwd(): No such file or directory (2)
rsync error: errors selecting input/output files, dirs (code 3) at 
util.c(1101) [Receiver=3.1.1]
Exit 3

Turns out that if the snapshots are hidden, then getcwd() errors out?
Setting snapdir=visible on the volume gets it to do its job.
As does changing out of the snapshot directory and using the full path 
for source and destination

Is this a bug or a feature?
10.2-STABLE FreeBSD 10.2-STABLE #324 r287170: Thu Aug 27

--WjW