From 12f7666a2f38658f418e33db9158d332545546b2 Mon Sep 17 00:00:00 2001
From: Kevin McCormick <github@mccormicklabs.com>
Date: Mon, 12 Sep 2016 11:28:48 -0700
Subject: [PATCH] fail early if destination fs doesn't exist

zfs receive will fail, but the source snapshot has already been created,
and the rotation/cleanup of old snapshots will be triggered
---
 backup-zfs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/backup-zfs b/backup-zfs
index 8c204e7..7898dc9 100755
--- a/backup-zfs
+++ b/backup-zfs
@@ -109,6 +109,11 @@ destfs="${dest#*:}"
 # get the last src component
 srcbase="${srcfs##*/}"
 
+# ensure the destination fs exists before proceeding
+if [[ $(ZFS "$desthost" list -H -o name "$destfs" 2>/dev/null) != $destfs ]] ; then
+	die 1 "destination fs '$destfs' doesn't exist"
+fi
+
 ###
 ### create new snapshot on src
 ###