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|
#! /bin/sh
# Restore backups.
# Copyright 2004-2021 Free Software Foundation, Inc.
# This file is part of GNU tar.
# GNU tar 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 of the License, or
# (at your option) any later version.
# GNU tar 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 this program. If not, see <http://www.gnu.org/licenses/>.
# Load library routines
SYSCONFDIR=${SYSCONFDIR-@sysconfdir@}
. ${LIBDIR-@libexecdir@}/backup.sh
usage() {
cat - <<EOF
usage: $PROGNAME [OPTIONS] [PATTERN [PATTERN...]]
Options are:
-a, --all Restore all filesystems.
-l, --level=LEVEL Start restoring from the given backup LEVEL
(default $DUMP_LEVEL).
-v, --verbose[=LEVEL] Set verbosity level. Default 100.
Informational options:
-h, --help Display this help message.
-V, --version Display program version.
Send bug reports to @PACKAGE_BUGREPORT@.
EOF
}
unset PATTERN
DUMP_LEVEL=0
CMDLINE="$0 $@"
for opt
do
if [ -z "$prev" ]; then
option=$opt
optarg=`expr "x$opt" : 'x[^=]*=\(.*\)'`
else
option="${prev}=$opt"
prev=""
optarg=$opt
fi
case $option in
-a|--a|--al|--all)
RESTORE_ALL=1
;;
--l=*|--le=*|--lev=*|--leve=*|--level=*)
DUMP_LEVEL=$optarg
;;
-l?*) DUMP_LEVEL=`expr $option : '-l\(.*\)'`;;
-l|--l|--le|--lev|--leve|--level)
prev=--level
;;
--verb=*|--verbo=*|--verbos=*|--verbose=*)
VERBOSE=$optarg
;;
-v|--verb|--verbo|--verbos|--verbose)
VERBOSE=100
;;
-v*) VERBOSE=`expr $option : '-v\(.*\)'`;;
-V|--v|--ve|--ver|--vers|--versi|--versio|--version)
echo "restore (@PACKAGE_NAME@) @VERSION@"
license
exit;;
-h|--h|--he|--hel|--help)
usage
exit;;
-*) bailout "Unknown option $opt. Try $PROGNAME --help for more info.";;
*) if [ -z "$PATTERN" ]; then
PATTERN=$opt
else
PATTERN="$PATTERN|$opt"
fi
;;
esac
done
if [ -z "$RESTORE_ALL" ]; then
if [ -z "$PATTERN" ]; then
usage
exit;
fi
fi
init_restore
cat > $LOGFILE <<EOF
This file contains any messages produced by $PROGNAME.
It was created by GNU $PROGNAME, from @PACKAGE@ (@VERSION@).
Invocation command line was
\$ $CMDLINE
EOF
restore_fs()
{
fs="`echo \"${1}\" | sed -e 's/^.*://'`"
fs=`root_fs $fs`
fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
remotehost="`expr \"${1}\" : '\([^/][^/]*\):.*'`"
if [ -z "$remotehost" ]; then
remotehost=$localhost
fi
message 10 "fs=$fs"
message 10 "fsname=$fsname"
message 10 "remotehost=$remotehost"
LOGPAT="`level_log_name ${fsname} '[0-9]'`"
PREFIX="`level_log_name ${fsname} ''`"
message 10 LOGPAT=$LOGPAT
message 10 PREFIX=$PREFIX
LEVELS=`remote_run "${remotehost}" ls $LOGPAT |
sed "s,$PREFIX,," | sort -n`
message 10 "LEVELS=$LEVELS"
echo "Starting restore of ${1} at level $DUMP_LEVEL."
for level in $LEVELS
do
if [ $level -lt $DUMP_LEVEL ]; then
message 10 "Skipping level $level"
continue;
fi
message 10 "Restoring level $level"
DATE=`get_dump_time $level`
FILE="`level_log_name ${fsname} ${level}`"
message 10 "FILE=$FILE"
LABEL="`print_level $level` backup of ${fs} on ${remotehost} at ${DATE}"
${RESTORE_BEGIN-:} $level $remotehost $fs $fsname
backup_host ${remotehost} \
"--listed=\"$FILE\"" \
"--label=\"$LABEL\"" \
-C $fs
${RESTORE_END-:} $level $remotehost $fs $fsname
done
}
restore_files()
{
LOGPAT="`level_log_name MISC '[0-9]'`"
PREFIX="`level_log_name MISC ''`"
message 10 LOGPAT=$LOGPAT
message 10 PREFIX=$PREFIX
LEVELS=`remote_run "${localhost}" ls $LOGPAT | sed "s,$PREFIX,," | sort -n`
message 10 "LEVELS=$LEVELS"
echo "Starting restore of miscellaneous files at level $DUMP_LEVEL."
for level in $LEVELS
do
if [ $level -lt $DUMP_LEVEL ]; then
message 10 "Skipping level $level"
continue;
fi
message 10 "Restoring level $level"
DATE=`get_dump_time $level`
FILE="`level_log_name MISC ${level}`"
message 10 "FILE=$FILE"
LABEL="`print_level $level` backup of miscellaneous files at ${DATE}"
${RESTORE_BEGIN-:} $level $localhost MISC MISC
backup_host ${localhost} \
"--listed=\"$FILE\"" \
"--label=\"$LABEL\"" \
-C ${ROOT_FS-/} $@
${RESTORE_END-:} $level $localhost MISC MISC
done
}
# Operation Overwiew:
#
# 1. Determine the time of the last backup
# 2. Create list of incremental listings to process
# 3. For each filesystem:
# 3.1. Start at the requested dump level (default 0) and proceed up to
# the last available level:
# 3.1.1 Deduce the volume label
# 3.1.2. Invoke [rsh] tar --listed=FILE --label=LABEL [opts] -xf $TAPE_FILE
# 4. End
(message 1 "Preparing for restore"
message 1 "processing backup directories"
for dir in ${BACKUP_DIRS}
do
message 1 "Processing $dir"
case $dir in
${PATTERN-*}) restore_fs $dir;;
esac
done
if [ "x${BACKUP_FILES}" != "x" ] ; then
message 1 "processing miscellaneous files"
if [ -z "$PATTERN" ]; then
restore_files
else
RESTORE_FILES=""
for file in ${BACKUP_FILES}
do
rel_file=`expr $file : '/\(.*\)'`
case $file in
$PATTERN) if [ -z "$RESTORE_FILES" ]; then
RESTORE_FILES="$rel_file"
else
RESTORE_FILES="$RESTORE_FILES $rel_file"
fi;;
esac
done
[ -z "$RESTORE_FILES" ] || restore_files $RESTORE_FILES
fi
fi) 2>&1 | tee -a "${LOGFILE}"
# EOF
|
