+orig_args=("$@")
+temp=$(getopt -l pull-reexec,help cl:m:nps:t:vh "$@") || usage 1
+eval set -- "$temp"
+while true; do
+ case $1 in
+ # only creates the config file, does not run btrbk
+ -c) conf_only=true; shift ;;
+ # bytes per second, suffix k m g
+ -l) rate_limit=$2; shift 2 ;;
+ # Comma separated mountpoints to backup. This has defaults set below.
+ -m) IFS=, mountpoints=($2); unset IFS; shift 2 ;;
+ -n) dry_run=true; dry_run_arg=-n; shift ;;
+ -p) progress_arg="--progress"; shift ;;
+ --pull-reexec) pull_reexec=true; shift ;;
+ -q) verbose=false; verbose_arg=; progress_arg=; shift ;;
+ # source host to receive a backup from
+ -s) source=$2; shift 2 ;;
+ # target hosts to send to. empty is valid for just doing local
+ # snapshot. we have default hosts we will populate.
+ -t) IFS=, targets=($2); unset IFS; shift 2 ;;
+ -v) verbose=true; verbose_arg=-v; shift ;;
+ -h|--help) usage ;;
+ --) shift; break ;;
+ *) echo "$0: Internal error!" ; exit 1 ;;
+ esac
+done
+
+# usefull commands are resume and archive
+cmd_arg=${1:-run}
+
+if [[ -v targets && $source ]]; then
+ echo "$0: error: -t and -s are mutually exclusive" >&2
+ exit 1
+fi
+
+
+echo -e "$0: options: conf_only=$conf_only\ndry_run=$dry_run\nrate_limit=$rate_limit\nverbose=$verbose\ncmd_arg=$cmd_arg"
+### end options parsing
+
+
+# set default targets
+if [[ ! -v targets && ! $source ]]; then
+ case $HOSTNAME in
+ x2|kw)
+ if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
+ targets=($HOME_DOMAIN)
+ fi
+ ;;
+ tp)
+ targets=(frodo)
+ if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
+ if timeout -s 9 10 ssh x2 :; then
+ targets+=(x2)
+ fi
+ fi
+ ;;
+ frodo)
+ targets=()
+ ;;
+ *)
+ echo "$0: error: no default targets for this host, use -t"
+ exit 1
+ ;;
+ esac
+fi
+
+if [[ -v targets ]]; then
+ echo "targets: ${targets[*]}"
+fi
+
+if [[ $source ]]; then
+ echo "source: $source"
+fi
+
+
+if [[ $mountpoints ]]; then
+ for mp in ${mountpoints[@]}; do # default mountpoints to sync
+ if [[ -e /nocow/btrfs-stale/$mp ]]; then
+ echo "$0: error: $mp is stale, mount-latest-subvol first"
+ exit 1
+ fi
+ done
+else
+ # set default mountpoints
+ case $HOSTNAME in
+ # no remote backups atm. note, if we do enable this, configuration below will need some changes.
+ # frodo)
+ # prospective_mps=(/i)
+ # ;;
+ *)
+ prospective_mps=(/a /q)
+ if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
+ prospective_mps+=(/o)
+ fi
+ ;;
+ esac
+ for mp in ${prospective_mps[@]}; do # default mountpoints to sync
+ if [[ -e /nocow/btrfs-stale/$mp ]]; then
+ echo "$0: warning: $mp stale, not adding to default mountpoints"
+ continue
+ fi
+ if awk '{print $2}' /etc/fstab | grep -xF $mp &>/dev/null; then
+ mountpoints+=($mp)
+ fi
+ done
+fi
+
+echo "mountpoints: ${mountpoints[*]}"
+
+
+
+# pull_reexec stops us from getting into an infinite loop if there is some
+# kind of weird problem
+pulla=false
+for m in "${mountpoints[@]}"; do
+ if [[ $m == /a ]]; then
+ pulla=true
+ break
+ fi
+done
+if ! $pull_reexec && [[ $source ]] && ! $pulla ; then
+ tmpf=$(mktemp)
+ scp $source:/a/bin/distro-setup/btrbk-run $tmpf
+ if ! diff -q $tmpf $BASH_SOURCE; then
+ echo "$0: found newer version on host $source. reexecing"
+ install -T $tmpf /usr/local/bin/btrbk-run
+ m /usr/local/bin/btrbk-run --pull-reexec "${orig_args[@]}"
+ exit
+ fi
+fi
+
+
+##### end command line parsing ########
+
+
+
+if ! which btrbk &>/dev/null; then
+ echo "$0: error: no btrbk binary found"
+ exit 1
+fi
+# if our mountpoints are from stale snapshots,
+# it doesn't make sense to do a backup.
+check-subvol-stale ${mountpoints[@]} || exit 1
+
+
+cat >/etc/btrbk.conf <<EOF
+ssh_identity /root/.ssh/home
+# Just a guess that local7 is a good facility to pick.
+# It's a bit odd that the transaction log has to be logged to
+# a file or syslog, while other output is sent to std out.
+# The man does not mention a way for them to be together, but
+# I dunno if setting a log level like warn might also output
+# transaction info.
+transaction_syslog local7
+
+# note, i had this because man said 20% speedup, but ran into
+# this issue, https://github.com/digint/btrbk/issues/275
+#stream_buffer 512m