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#!/usr/bin/env bash
set -euo pipefail
#################### CONFIG ####################
LUKS_SOURCE="/dev/disk/by-uuid/bdd2a016-b6db-493d-ad0a-e8dd8a93dfbd"
MAPPER_NAME="usb_safe"
MOUNTPOINT="/mnt/usb_safe"
RAW_DEVICE=""
# Source vault (docs/vault)
SOURCE_VAULT_MOUNT="$HOME/docs/vault"
SOURCE_VAULT_IMAGE="$HOME/secure/containers/work-vault.img"
SOURCE_VAULT_MAPPER="vault"
# Tomb
SECRETS_TOMB_FILE="$HOME/.secrets.tomb"
SECRETS_TOMB_KEY="$HOME/.secrets.tomb.key"
SECRETS_TOMB_MOUNT="/media/.secrets"
BACKUP_ITEMS=(
"$HOME/.abook"
"$HOME/.config"
"$HOME/docs"
"$HOME/git"
"$HOME/.password-store"
"$HOME/secure"
"$HOME/.password.tomb"
"$HOME/.password.tomb.key"
"$HOME/.secrets.tomb"
"$HOME/.secrets.tomb.key"
"/media/.secrets"
"$HOME/.bitmonero"
"$HOME/.electrum"
"$HOME/.zotero-data"
)
RSYNC_OPTS=(
-a
--delete
--no-perms
--no-owner
--no-group
--no-xattrs
--omit-dir-times
--progress
)
LOGFILE="$HOME/backup_flash_rsync.log"
#################### HELPERS ####################
die() { echo "ERROR: $*" >&2; exit 1; }
is_mapper_open() { [[ -e "/dev/mapper/${MAPPER_NAME}" ]]; }
is_mounted() { mountpoint -q "${MOUNTPOINT}"; }
require_mount() {
local path="$1"
local label="$2"
[[ -e "$path" ]] || die "${label} path missing: ${path}"
mountpoint -q "$path" || die "${label} is not mounted: ${path}"
}
OPENED_SOURCE_VAULT=0
OPENED_SECRETS_TOMB=0
ensure_source_vault_open() {
if mountpoint -q "${SOURCE_VAULT_MOUNT}"; then
echo ">>> Source vault already mounted"
return
fi
echo ">>> Opening source vault..."
mkdir -p "${SOURCE_VAULT_MOUNT}"
if [[ ! -e "/dev/mapper/${SOURCE_VAULT_MAPPER}" ]]; then
sudo cryptsetup open "${SOURCE_VAULT_IMAGE}" "${SOURCE_VAULT_MAPPER}"
fi
sudo mount "/dev/mapper/${SOURCE_VAULT_MAPPER}" "${SOURCE_VAULT_MOUNT}"
OPENED_SOURCE_VAULT=1
}
ensure_secrets_tomb_open() {
if mountpoint -q "${SECRETS_TOMB_MOUNT}"; then
echo ">>> Secrets tomb already mounted"
return
fi
echo ">>> Opening secrets tomb..."
tomb open "${SECRETS_TOMB_FILE}" -k "${SECRETS_TOMB_KEY}" "${SECRETS_TOMB_MOUNT}"
OPENED_SECRETS_TOMB=1
}
cleanup() {
set +e
if is_mounted; then
echo ">>> Unmounting backup drive..."
sudo umount "${MOUNTPOINT}" || true
fi
if is_mapper_open; then
echo ">>> Closing backup mapper..."
sudo cryptsetup close "${MAPPER_NAME}" || true
fi
if [[ "${OPENED_SECRETS_TOMB}" -eq 1 ]]; then
echo ">>> Closing secrets tomb..."
tomb close "${SECRETS_TOMB_MOUNT}" || true
fi
if [[ "${OPENED_SOURCE_VAULT}" -eq 1 ]]; then
echo ">>> Closing source vault..."
sudo umount "${SOURCE_VAULT_MOUNT}" || true
sudo cryptsetup close "${SOURCE_VAULT_MAPPER}" || true
fi
if [[ -n "${RAW_DEVICE}" ]]; then
udisksctl power-off -b "${RAW_DEVICE}" >/dev/null 2>&1 || true
fi
}
trap cleanup EXIT
#################### OPEN DESTINATION ####################
echo ">>> Ensuring backup mountpoint exists..."
sudo mkdir -p "${MOUNTPOINT}"
if is_mounted; then
echo ">>> Backup drive already mounted at ${MOUNTPOINT}"
elif is_mapper_open; then
echo ">>> Backup mapper already open, mounting..."
sudo mount "/dev/mapper/${MAPPER_NAME}" "${MOUNTPOINT}"
else
echo ">>> Opening backup LUKS..."
sudo cryptsetup open "${LUKS_SOURCE}" "${MAPPER_NAME}"
echo ">>> Mounting backup filesystem..."
sudo mount "/dev/mapper/${MAPPER_NAME}" "${MOUNTPOINT}"
fi
#################### OPEN SOURCES ####################
ensure_source_vault_open
ensure_secrets_tomb_open
require_mount "${SOURCE_VAULT_MOUNT}" "Vault"
require_mount "${SECRETS_TOMB_MOUNT}" "Secrets"
#################### BACKUP ####################
echo "[$(date)] Backup start" >> "$LOGFILE"
ANY_WARNING=0
for SRC in "${BACKUP_ITEMS[@]}"; do
[[ -e "${SRC}" ]] || die "Missing: ${SRC}"
NAME="$(basename "${SRC}")"
DEST="${MOUNTPOINT}/${NAME}"
echo ">>> ${SRC} -> ${DEST}"
echo "[$(date)] rsync: ${SRC} -> ${DEST}" >> "$LOGFILE"
set +e
if [[ -d "${SRC}" ]]; then
rsync "${RSYNC_OPTS[@]}" "${SRC}/" "${DEST}/" 2>>"$LOGFILE"
else
rsync "${RSYNC_OPTS[@]}" "${SRC}" "${DEST}" 2>>"$LOGFILE"
fi
RS=$?
set -e
if [[ "${RS}" -eq 0 ]]; then
echo ">>> rsync OK: ${SRC}"
echo "[$(date)] rsync OK: ${SRC}" >> "$LOGFILE"
elif [[ "${RS}" -eq 23 || "${RS}" -eq 24 ]]; then
echo ">>> WARNING: rsync non-critical issues (code ${RS}) for: ${SRC}"
echo "[$(date)] WARNING: rsync code ${RS} for: ${SRC}" >> "$LOGFILE"
ANY_WARNING=1
else
echo "[$(date)] ERROR: rsync failed code ${RS} for: ${SRC}" >> "$LOGFILE"
exit "${RS}"
fi
done
if [[ "${ANY_WARNING}" -eq 1 ]]; then
echo ">>> Backup completed WITH WARNINGS"
echo "[$(date)] Backup completed WITH WARNINGS" >> "$LOGFILE"
else
echo ">>> Backup completed OK"
echo "[$(date)] Backup completed OK" >> "$LOGFILE"
fi
echo ">>> Done"
sync
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