From c720dea8e601ff3a6acd6ee982dae431923c294a Mon Sep 17 00:00:00 2001
From: Thomas Merkel <tm@core.io>
Date: Tue, 31 Jul 2018 15:21:14 +0200
Subject: [PATCH] Provide support for FreeBSD

bash is not always located at /bin/bash so it's required to use /usr/bin/env to lookup for the correct bash location. On FreeBSD (and maybe on different operating systems) bind mount didn't work so nullfs need to be used on FreeBSD for example - providing an option in the conf-file. To support different remote locations it should be supported to specify the remote borg command path.
---
 borgsnap          | 12 ++++++------
 sample.conf       |  1 +
 sample_rsync.conf |  2 ++
 3 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/borgsnap b/borgsnap
index d0dfd82..73483bf 100755
--- a/borgsnap
+++ b/borgsnap
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # borgsnap - licensed under GPLv3. See the LICENSE file for additional
 # details.
@@ -109,13 +109,13 @@ dobackup() {
   echo "------ $(date) ------"
   bind_dir="${OUT}/bind/${1}"
   mkdir -p "$bind_dir"
-  mount --bind "${mount}/.zfs/snapshot/${2}" "$bind_dir"
+  mount -t ${MOUNT_FS_TYPE:-bind} "${mount}/.zfs/snapshot/${2}" "$bind_dir"
   echo "Doing local backup of ${1}@${2}"
   BORG_OPTS="--info --stats --compression lz4 --exclude-if-present .noborg"
   borg create $BORG_OPTS "${borgdir}::${2}" "$bind_dir"
   if [[ -n $rsyncdir ]]; then
     echo "Doing rsync backup of ${1}@${2}"
-    borg create $BORG_OPTS --remote-path=borg1 "${rsyncdir}::${2}" "$bind_dir"
+    borg create $BORG_OPTS --remote-path=$REMOTE_BORG "${rsyncdir}::${2}" "$bind_dir"
   fi
   umount "$bind_dir"
 }
@@ -143,7 +143,7 @@ purgeold() {
     borg prune $BORG_OPTS "$borgdir"
     if [[ -n $rsyncdir ]]; then
       echo "Pruning rsync borg"
-      borg prune $BORG_OPTS --remote-path=borg1 "$rsyncdir"
+      borg prune $BORG_OPTS --remote-path=$REMOTE_BORG "$rsyncdir"
     fi
   fi
 }
@@ -168,14 +168,14 @@ for i in $FS; do
   if [[ ! -d $borgdir ]]; then
     echo "Initializing borg $borgdir"
     mkdir -p "$borgdir"
-    borg init "$borgdir"
+    borg init --encryption=keyfile "$borgdir"
     if [[ -n $REMOTE ]]; then
       echo "Initializing rsync $rsyncdir"
       host=${REMOTE%:*}
       dir=${REMOTE#*:}
       ssh "$host" mkdir -p "$dir/$pool/$fs"
       if [[ -n $rsyncdir ]]; then
-        borg init --remote-path=borg1 "$rsyncdir"
+        borg init --encryption=keyfile --remote-path=$REMOTE_BORG "$rsyncdir"
       fi
     fi
   fi
diff --git a/sample.conf b/sample.conf
index 4762538..f52bd9e 100644
--- a/sample.conf
+++ b/sample.conf
@@ -2,6 +2,7 @@ FS="zroot/root zroot/home zdata/data"
 OUT="/backup/borg"
 REMOTE=""
 PASS="/path/to/my/super/secret/myhost.key"
+MOUNT_FS_TYPE="bind"
 MONTH_KEEP=1
 WEEK_KEEP=4
 DAY_KEEP=7
diff --git a/sample_rsync.conf b/sample_rsync.conf
index c3367fb..8bfc72c 100644
--- a/sample_rsync.conf
+++ b/sample_rsync.conf
@@ -1,7 +1,9 @@
 FS="zroot/root zroot/home zdata/data"
 OUT="/backup/borg"
 REMOTE="XXXX@YYYY.rsync.net:myhost"
+REMOTE_BORG="borg1"
 PASS="/path/to/my/super/secret/myhost.key"
+MOUNT_FS_TYPE="bind"
 MONTH_KEEP=1
 WEEK_KEEP=4
 DAY_KEEP=7