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#! /bin/sh
# This file is part of BEAM
# Copyright (C) 2012-2014 Sergey Poznyakoff
#
# BEAM is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# BEAM is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with BEAM. If not, see <http://www.gnu.org/licenses/>.
# Configuration keywords:
#
# item_type=fs [mandatory]
# item_dir=STRING [mandatory]
# item_files=STRING [mandatory]
# item_exclude=STRING [optional]
# item_exclude_from=STRING [optional]
# item_tar_options=STRING [optional internal]
#
# initdb item
# Initializes snapshot for the given basename.
initdb() {
local filename
if [ -n "$dry_run" ]; then
logit "initializing snapshot for $1"
return
fi
if [ $level -eq 0 ]; then
filename=$backup_snapshot_dir/$1-$week-$round-$level.db
test -r $filename && rm $filename
else
if [ $level -eq 1 ]; then
filename=$backup_snapshot_dir/$1-$week-0-0.db
else
filename=$backup_snapshot_dir/$1-$week-$round-$((level - 1)).db
fi
if [ -r $filename ]; then
cp $filename $backup_snapshot_dir/$1-$week-$round-$level.db
else
logit "previous snapshot file $filename not found; falling back to level 0"
filename=$backup_snapshot_dir/$1-$week-$round-$level.db
test -r $filename && rm $filename
fi
fi
}
# fs_check item
fs_check() {
local rc=0 root files
eval root=\$${1}_dir
eval files=\$${1}_files
test -z "$root" && rc=1 && error "${1}_dir not set"
test -z "$files" && rc=1 && error "${1}_files not set"
return $rc
}
# fs_list item prefix
fs_list() {
local dir files lsf=
eval dir=\$${1}_dir files=\$${1}_files
for file in $files
do
if [ -d "$dir/$file" ]; then
lsf="$lsf $file/"
else
lsf="$lsf $file"
fi
done
echo "${2}Files and directories in $dir:$lsf"
}
# fs_backup item
fs_backup() {
local basename text root files exclude addopts s e
basename=$1-$week-$round-$level
eval text=\$${1}_text
eval root=\$${1}_dir
eval files=\$${1}_files
eval addopts=\$${1}_tar_options
eval exclude=\$${1}_exclude
for e in $exclude
do
eval s="$e"
addopts="$addopts --exclude=$s"
done
eval exclude=\$${1}_exclude_from
for e in $exclude
do
addopts="$addopts --exclude-from=$e"
done
test -z "$root" && abend 1 "${1}_dir not set"
test -z "$files" && abend 1 "${1}_files not set"
test -z "$text" && text="$1"
initdb $1
logit "backing up $text ($basename.$tar_suffix)"
$dry_run tar $verbose $taroptions $addopts \
-f $backup_archive_dir/$basename.$tar_suffix \
--listed=$backup_snapshot_dir/$basename.db \
-C $root $files
tarcode $?
}
# fs_restore item
fs_restore() {
local i text root files tarcommand
eval text=\$${1}_text
eval root=\$${1}_dir
eval files=\$${1}_files
test -z "$root" && abend 1 "${1}_dir not set"
test -z "$files" && abend 1 "${1}_files not set"
test -z "$text" && text="$1"
tarcommand="tar $verbose $taroptions -C $root --listed-incremental=/dev/null -f"
logit "restoring $text"
logit "restoring from level 0 backup"
$dry_run $tarcommand $backup_archive_dir/$1-$week-0-0.$tar_suffix
tarcode $?
for i in $(seq 1 $level)
do
logit "restoring from the $round/$i backup"
$dry_run $tarcommand $backup_archive_dir/$1-$week-$round-$i.$tar_suffix
tarcode $?
done
logit "finished restoring $text"
}
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