diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | Makefile | 5 | ||||
| -rw-r--r-- | forwarddown.in | 111 |
3 files changed, 115 insertions, 2 deletions
@@ -4,6 +4,7 @@ backup@.timer backup-progress backup-statistics fast-repair +forwarddown last-backups remove-old-backups man.commons @@ -33,6 +33,7 @@ all: man.commons \ backup@.service backup@.timer \ backup-progress \ backup-statistics backup-statistics.1 \ + forwarddown forwarddown.1 \ last-backups last-backups.1 \ remove-old-backups remove-old-backups.1 @@ -53,9 +54,9 @@ all: man.commons \ .PHONY: install dist clean install: all - install -D -m0755 -t $(DESTDIR)$(BINDIR) backup backup-progress backup-statistics last-backups remove-old-backups + install -D -m0755 -t $(DESTDIR)$(BINDIR) backup backup-progress backup-statistics forwarddown last-backups remove-old-backups install -D -m0644 -t $(DESTDIR)$(LIBDIR)/systemd/system backup@.service backup@.timer - install -D -m0644 -t $(DESTDIR)$(MANDIR)/man1 backup.1 backup-statistics.1 last-backups.1 remove-old-backups.1 + install -D -m0644 -t $(DESTDIR)$(MANDIR)/man1 backup.1 backup-statistics.1 forwarddown.1 last-backups.1 remove-old-backups.1 install -D -m0644 -t $(DESTDIR)$(ETCDIR) backup.conf install -D -m0755 -T sendmailadvanced.hook $(DESTDIR)$(ETCDIR)/sendmailadvanced.hooks/last-backups diff --git a/forwarddown.in b/forwarddown.in new file mode 100644 index 0000000..31b4487 --- /dev/null +++ b/forwarddown.in @@ -0,0 +1,111 @@ +#!/bin/bash + +[ -r "#ETCDIR#/backup.conf" ] && \ + . "#ETCDIR#/backup.conf" + +usage() +{ + >&2 echo \ +'Usage: forwarddown key-id date backup-id1 backup-id2 ... +Write encrypted, compressed tar from backed up files not newer than date to stdout. + +Options: + key-id key id of key to encrypt to + date backup should not be newer than the given date + backup-id[n] backups to restore +#HELPTEXT# #' + [ -z "$1" ] && exit 1 + exit $1 +} + +if [ $# -eq 1 ]; then + if [ "$1" == "--help" ]; then + usage 0 + elif [ "$1" == "--version" ]; then + echo '#VERSION#' + exit + fi +fi + +if [ $# -lt 3 ]; then + usage +fi + +key_id=$( + printf '%s\n' "$1" \ + | tr '[:lower:]' '[:upper:]' +) +shift + +if ! gpg --list-keys --with-colon "${key_id}" \ +| grep -qxF 'fpr:::::::::'"${key_id}"':'; then + >&2 printf 'Cannot find gpg key with fingerprint "%s"\n' "${key_id}" + usage +fi + +if ! date=$(date -u '+%Y_%m_%d' -d"${1}"); then + >&2 printf 'Cannot parse date "%s"\n' "${1}" + usage +fi +shift + +forwarddown_dirs=() + +for backup_id in "$@"; do + if [ -z "${backups[${backup_id}]}" ]; then + >&2 printf 'backup id "%s" is unknown\n' "${backup_id}" + usage + fi + forwarddown_dirs+=("${backups[${backup_id}]## *}") +done + +date=$( + { + find "${forwarddown_dirs[@]%% *}" -mindepth 1 -maxdepth 1 -type d -printf '0 %f\n' + printf '1 %s\n' "${date}" + } \ + | sort -k2,2 -k1,1 \ + | sed ' + s/^0 // + t + /^1 / q + ' \ + | uniq -c \ + | sed ' + s/^\s*'"${#forwarddown_dirs[@]}"'\s\+// + t + d + ' \ + | tail -n1 +) + +transforms=( + $( + for backup_id in "$@"; do + printf -- '--transform=s@^%s/%s/@%s/%s/@\n' \ + "${backups[${backup_id}]%% *}" \ + "${date}" \ + "${date}" \ + "${backup_id}" + done + ) +) + +directories=( + $( + for backup_id in "$@"; do + printf '%s/%s/\n' \ + "${backups[${backup_id}]%% *}" \ + "${date}" + done + ) +) + +tar \ + -c \ + -f - \ + --absolute-names \ + "${transforms[@]}" \ + "${directories[@]}" \ +| pigz --best -c - \ +| gpg -e -r "${key_id}" -o - - |