75 lines
1.7 KiB
Bash
75 lines
1.7 KiB
Bash
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#!/bin/sh
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# env
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# Written in 2021 by Lucas
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# CC0 1.0 Universal/Public domain - No rights reserved
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#
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# To the extent possible under law, the author(s) have dedicated all
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# copyright and related and neighboring rights to this software to the
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# public domain worldwide. This software is distributed without any
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# warranty. You should have received a copy of the CC0 Public Domain
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# Dedication along with this software. If not, see
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# <http://creativecommons.org/publicdomain/zero/1.0/>.
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usage()
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{
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printf "Usage: %s [-c] [-l login_name] host backup-name\n" \
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"${0##*/}" >&2
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exit 1
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}
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err()
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{
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printf "%s: %s\n" "${0##*/}" "$*" >&2
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exit 1
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}
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login_name=$(id -nu)
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agent_mode=yes
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while getopts cl: flag; do
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case $flag in
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c) agent_mode=confirm ;;
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l) login_name=$OPTARG ;;
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*) usage
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esac
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done
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shift $((OPTIND - 1))
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if [ $# -ne 2 ] || [ -z "$1" ] || [ -z "$2" ]; then
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usage
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fi
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host=$1
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backup_name=$2
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[ -f "$host/bulist" ] || err "no bulist present in \"$h/\""
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eval $(ssh-agent -s)
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trap 'eval $(ssh-agent -ks)' EXIT INT QUIT TERM
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set -e
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# Load correct key into ssh-agent.
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ssh -o AddKeysToAgent=$agent_mode "$login_name@$host" true
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cd "$host"
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tmpdir=$(ssh "$login_name@$host" mktemp -dt rbucmd.XXXXXX)
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sftp "$login_name@$host" <<EOF
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put bulist $tmpdir/bulist
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EOF
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ssh "$login_name@$host" "cat - >\"$tmpdir/bu.sh\"" <<EOF
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cd / &&
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pkg_info -mz >/tmp/pkg-info.txt &&
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doas xargs pax -wzf "$tmpdir/$backup_name.tgz" <"$tmpdir/bulist" &&
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doas chown "$login_name:$login_name" "$tmpdir/$backup_name.tgz"
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EOF
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# -t is needed for doas to read a password.
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ssh -t "$login_name@$host" sh "$tmpdir/bu.sh"
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sftp -o "user=$login_name" "$host" <<EOF
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get $tmpdir/$backup_name.tgz
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rm $tmpdir/*
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rmdir $tmpdir/
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rm /tmp/pkg-info.txt
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EOF
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