From 1ada10f44e2baf28823156c006c82a076c52f530 Mon Sep 17 00:00:00 2001
From: Ludovic Pouzenc <ludovic@pouzenc.fr>
Date: Fri, 15 Jan 2021 23:17:34 +0100
Subject: borg-family_0.1-1

---
 borg-family-0.1/src/etc/bfhooks           | 27 +++++++++++++++++++++++++++
 borg-family-0.1/src/etc/confvars          |  5 +++++
 borg-family-0.1/src/etc/excludes.d/home   |  4 ++++
 borg-family-0.1/src/etc/excludes.d/rootfs |  5 +++++
 borg-family-0.1/src/sbin/bfenv            | 31 +++++++++++++++++++++++++++++++
 borg-family-0.1/src/sbin/bfrun            | 29 +++++++++++++++++++++++++++++
 borg-family-0.1/src/sbin/bfwhat           | 24 ++++++++++++++++++++++++
 7 files changed, 125 insertions(+)
 create mode 100755 borg-family-0.1/src/etc/bfhooks
 create mode 100644 borg-family-0.1/src/etc/confvars
 create mode 100644 borg-family-0.1/src/etc/excludes.d/home
 create mode 100644 borg-family-0.1/src/etc/excludes.d/rootfs
 create mode 100755 borg-family-0.1/src/sbin/bfenv
 create mode 100755 borg-family-0.1/src/sbin/bfrun
 create mode 100755 borg-family-0.1/src/sbin/bfwhat

(limited to 'borg-family-0.1/src')

diff --git a/borg-family-0.1/src/etc/bfhooks b/borg-family-0.1/src/etc/bfhooks
new file mode 100755
index 0000000..5b6b204
--- /dev/null
+++ b/borg-family-0.1/src/etc/bfhooks
@@ -0,0 +1,27 @@
+#!/bin/bash -e
+mount_bind_rootfs() {
+	if ! mount | grep -q /rootfs; then
+		mkdir -p /rootfs
+		mount --bind / /rootfs
+	fi
+}
+
+umount_bind_rootfs() {
+	if mount | grep -q /rootfs; then
+		umount /rootfs || lsof -n | grep /rootfs
+		rmdir /rootfs
+	fi
+}
+
+case $1 in
+	before)
+		case $2 in
+			rootfs) apt-get clean || true; mount_bind_rootfs;;
+		esac
+		;;
+	after)
+		case $2 in
+			rootfs) umount_bind_rootfs ;;
+		esac
+		;;
+esac
diff --git a/borg-family-0.1/src/etc/confvars b/borg-family-0.1/src/etc/confvars
new file mode 100644
index 0000000..f737648
--- /dev/null
+++ b/borg-family-0.1/src/etc/confvars
@@ -0,0 +1,5 @@
+# This file is used by bfenv and bfrun (bash scripts)
+borg_init_opts=( -e repokey-blake2 --make-parent-dirs -v )
+borg_check_opts=( --last $((1+$(bfwhat | wc -l) )) -v )
+borg_create_opts=( --one-file-system --compression zstd --exclude-caches --exclude-if-present=NOBACKUPDIR.TAG --keep-exclude-tags --list --filter=AMEi-x --stats --show-rc -v )
+quiet=0
diff --git a/borg-family-0.1/src/etc/excludes.d/home b/borg-family-0.1/src/etc/excludes.d/home
new file mode 100644
index 0000000..c7aead3
--- /dev/null
+++ b/borg-family-0.1/src/etc/excludes.d/home
@@ -0,0 +1,4 @@
+**/.cache/*
+/home/*/.mozilla/**/datareporting
+/home/*/.thunderbird/**/global-messages-db.sqlite
+/home/*/.thunderbird/**/ImapMail
diff --git a/borg-family-0.1/src/etc/excludes.d/rootfs b/borg-family-0.1/src/etc/excludes.d/rootfs
new file mode 100644
index 0000000..b61797b
--- /dev/null
+++ b/borg-family-0.1/src/etc/excludes.d/rootfs
@@ -0,0 +1,5 @@
+/rootfs/var/cache/apt/*
+**/.cache/*
+/rootfs/home/*/.mozilla/**/datareporting
+/rootfs/home/*/.thunderbird/**/global-messages-db.sqlite
+/rootfs/home/*/.thunderbird/**/ImapMail
diff --git a/borg-family-0.1/src/sbin/bfenv b/borg-family-0.1/src/sbin/bfenv
new file mode 100755
index 0000000..756ef62
--- /dev/null
+++ b/borg-family-0.1/src/sbin/bfenv
@@ -0,0 +1,31 @@
+#!/bin/bash
+umask 0077
+source /etc/borg-family/confvars
+source /etc/borg-family/envvars
+PATH="/etc/borg-family:$PATH"
+
+if [ \! -r /etc/borg-family/passphrase ]; then
+	echo "No passphrase (repokey) found, creating a new one" >&2
+	touch /etc/borg-family/passphrase
+	chmod 600 /etc/borg-family/passphrase
+	pwgen 32 1 >> /etc/borg-family/passphrase
+	ls -l /etc/borg-family/passphrase >&2
+	echo "You NEED to store it in a password manager to be able to restore backups" >&2
+fi
+
+if [ \! -r /etc/borg-family/id_rsa_borg ]; then
+	echo "No SSH key found, creating a new one" >&2
+	ssh-keygen -N "" -C "$(id -un)_borg@$(hostname)" -f /etc/borg-family/id_rsa_borg \
+		&& cat /etc/borg-family/id_rsa_borg.pub
+fi
+
+borg init "${borg_init_opts[@]}" 2>&1 | grep -vE '^A repository already exists' >&2
+
+if ! borg check "${borg_check_opts[@]}"; then
+	echo "Showing BORG_* env variables (see /etc/borg-family/envvars) :" >&2
+	env | grep ^BORG_ >&2
+	echo "End of BORG_* env variables" >&2
+	echo >&2
+	echo "Can't access to or check the borg repository, exiting, no backup made" >&2
+	exit 1
+fi
diff --git a/borg-family-0.1/src/sbin/bfrun b/borg-family-0.1/src/sbin/bfrun
new file mode 100755
index 0000000..c02187a
--- /dev/null
+++ b/borg-family-0.1/src/sbin/bfrun
@@ -0,0 +1,29 @@
+#!/bin/bash
+source bfenv
+bfwhat | while IFS=' ' read -r mpe dev; do
+	mp=$(echo -e "$mpe")              # mp: interpret escapings that may be present in /proc/mounts (\040 for space...)
+	name=${mp// /_};                  # name: replace space by underscore
+	name=${mp//\//-}; name=${name/-/} # name: replace slash by dash, remove the leading one
+	if [[ "$mp $name $dev" =~ "--" || "$mp $name $dev" =~ ".." || "$mp $name $dev" =~ "[|&;()<>]" ]]; then
+		echo "Skipping $mpe because of shell unsafe characters" >&2
+		continue
+	fi
+
+	comment=$(blkid -- "$dev")
+	if [ -r "/etc/borg-family/excludes.d/$name" ]; then
+		runtime_args=( --comment="$comment" --exclude-from="/etc/borg-family/excludes.d/$name" )
+	else	
+		runtime_args=( --comment="$comment" )
+	fi
+
+	bfhooks before "$name" && \
+	borg create "${runtime_args[@]}" "${borg_create_opts[@]}" "::{hostname}-$name-{now:%Y-%m-%d}" "$mp"
+	rc1=$?
+	bfhooks after "$name"
+	rc2=$?
+	if [ "$rc1" -ne 0 -o "$rc2" -ne 0 ]; then
+		echo "Errors during $name backup, return codes $rc1 (bfhook before && borg create) and $rc2 (bfhook after)" >&2
+	else
+		[ "x$quiet" == "x1" ] || echo "Success for $name backup"
+	fi
+done
diff --git a/borg-family-0.1/src/sbin/bfwhat b/borg-family-0.1/src/sbin/bfwhat
new file mode 100755
index 0000000..bf9cf4d
--- /dev/null
+++ b/borg-family-0.1/src/sbin/bfwhat
@@ -0,0 +1,24 @@
+#!/bin/bash
+what-from-proc-mounts() {
+	# Special case for "/", show it as /rootfs (see hook_* files). Helps saving initial /dev nodes files behind udev
+	awk '( $2 == "/" ) { print "/rootfs",$1 }' /proc/mounts
+
+	# Backup all non "/", non-removable, mounted filesystems which device is also shown in /sys/block
+	tmp=$(mktemp)
+	grep 0 /sys/block/*/removable | sed -e 's#^/sys/block#^/dev#' -e 's#/removable:0$##' >> "$tmp"
+	grep -Ef "$tmp" /proc/mounts | awk '( $2 !~ /^\/(rootfs|$)/ ) { print $2,$1 }'
+	rm -- "$tmp"
+}
+
+if [ -r /etc/borg-family/what.override ]; then
+	cat /etc/borg-family/what.override
+else
+	if [ -r /etc/borg-family/what.include ]; then
+		cat /etc/borg-family/what.include
+	fi
+	if [ -r /etc/borg-family/what.exclude ]; then
+		what-from-proc-mounts | grep -vEf /etc/borg-family/what.exclude
+	else
+		what-from-proc-mounts
+	fi
+fi
-- 
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