Initial class construction
This commit is contained in:
João Narciso
231
Git/usr/bin/restore
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231
Git/usr/bin/restore
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#! /bin/sh
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# Restore backups.
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# Copyright 2004-2019 Free Software Foundation, Inc.
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# This file is part of GNU tar.
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# GNU tar is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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# GNU tar is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Load library routines
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SYSCONFDIR=${SYSCONFDIR-/usr/etc}
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. ${LIBDIR-/usr/lib/tar}/backup.sh
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usage() {
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cat - <<EOF
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usage: $PROGNAME [OPTIONS] [PATTERN [PATTERN...]]
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Options are:
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-a, --all Restore all filesystems.
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-l, --level=LEVEL Start restoring from the given backup LEVEL
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(default $DUMP_LEVEL).
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-v, --verbose[=LEVEL] Set verbosity level. Default 100.
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Informational options:
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-h, --help Display this help message.
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-V, --version Display program version.
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Send bug reports to bug-tar@gnu.org.
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EOF
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}
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unset PATTERN
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DUMP_LEVEL=0
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CMDLINE="$0 $@"
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for opt
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do
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if [ -z "$prev" ]; then
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option=$opt
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optarg=`expr "x$opt" : 'x[^=]*=\(.*\)'`
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else
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option="${prev}=$opt"
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prev=""
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optarg=$opt
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fi
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case $option in
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-a|--a|--al|--all)
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RESTORE_ALL=1
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;;
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--l=*|--le=*|--lev=*|--leve=*|--level=*)
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DUMP_LEVEL=$optarg
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;;
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-l?*) DUMP_LEVEL=`expr $option : '-l\(.*\)'`;;
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-l|--l|--le|--lev|--leve|--level)
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prev=--level
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;;
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--verb=*|--verbo=*|--verbos=*|--verbose=*)
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VERBOSE=$optarg
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;;
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-v|--verb|--verbo|--verbos|--verbose)
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VERBOSE=100
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;;
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-v*) VERBOSE=`expr $option : '-v\(.*\)'`;;
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-V|--v|--ve|--ver|--vers|--versi|--versio|--version)
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echo "restore (GNU tar) 1.31"
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license
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exit;;
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-h|--h|--he|--hel|--help)
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usage
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exit;;
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-*) bailout "Unknown option $opt. Try $PROGNAME --help for more info.";;
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*) if [ -z "$PATTERN" ]; then
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PATTERN=$opt
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else
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PATTERN="$PATTERN|$opt"
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fi
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;;
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esac
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done
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if [ -z "$RESTORE_ALL" ]; then
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if [ -z "$PATTERN" ]; then
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usage
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exit;
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fi
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fi
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init_restore
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cat > $LOGFILE <<EOF
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This file contains any messages produced by $PROGNAME.
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It was created by GNU $PROGNAME, from @PACKAGE@ (1.31).
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Invocation command line was
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\$ $CMDLINE
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EOF
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restore_fs()
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{
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fs="`echo \"${1}\" | sed -e 's/^.*://'`"
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fs=`root_fs $fs`
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fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
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remotehost="`expr \"${1}\" : '\([^/][^/]*\):.*'`"
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if [ -z "$remotehost" ]; then
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remotehost=$localhost
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fi
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message 10 "fs=$fs"
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message 10 "fsname=$fsname"
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message 10 "remotehost=$remotehost"
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LOGPAT="`level_log_name ${fsname} '[0-9]'`"
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PREFIX="`level_log_name ${fsname} ''`"
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message 10 LOGPAT=$LOGPAT
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message 10 PREFIX=$PREFIX
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LEVELS=`remote_run "${remotehost}" ls $LOGPAT |
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sed "s,$PREFIX,," | sort -n`
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message 10 "LEVELS=$LEVELS"
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echo "Starting restore of ${1} at level $DUMP_LEVEL."
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for level in $LEVELS
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do
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if [ $level -lt $DUMP_LEVEL ]; then
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message 10 "Skipping level $level"
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continue;
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fi
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message 10 "Restoring level $level"
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DATE=`get_dump_time $level`
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FILE="`level_log_name ${fsname} ${level}`"
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message 10 "FILE=$FILE"
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LABEL="`print_level $level` backup of ${fs} on ${remotehost} at ${DATE}"
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${RESTORE_BEGIN-:} $level $remotehost $fs $fsname
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backup_host ${remotehost} \
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"--listed=\"$FILE\"" \
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"--label=\"$LABEL\"" \
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-C $fs
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${RESTORE_END-:} $level $remotehost $fs $fsname
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done
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}
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restore_files()
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{
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LOGPAT="`level_log_name MISC '[0-9]'`"
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PREFIX="`level_log_name MISC ''`"
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message 10 LOGPAT=$LOGPAT
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message 10 PREFIX=$PREFIX
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LEVELS=`remote_run "${localhost}" ls $LOGPAT | sed "s,$PREFIX,," | sort -n`
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message 10 "LEVELS=$LEVELS"
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echo "Starting restore of miscellaneous files at level $DUMP_LEVEL."
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for level in $LEVELS
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do
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if [ $level -lt $DUMP_LEVEL ]; then
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message 10 "Skipping level $level"
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continue;
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fi
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message 10 "Restoring level $level"
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DATE=`get_dump_time $level`
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FILE="`level_log_name MISC ${level}`"
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message 10 "FILE=$FILE"
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LABEL="`print_level $level` backup of miscellaneous files at ${DATE}"
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${RESTORE_BEGIN-:} $level $localhost MISC MISC
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backup_host ${localhost} \
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"--listed=\"$FILE\"" \
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"--label=\"$LABEL\"" \
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-C ${ROOT_FS-/} $@
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${RESTORE_END-:} $level $localhost MISC MISC
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done
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}
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# Operation Overwiew:
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#
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# 1. Determine the time of the last backup
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# 2. Create list of incremental listings to process
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# 3. For each filesystem:
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# 3.1. Start at the requested dump level (default 0) and proceed up to
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# the last available level:
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# 3.1.1 Deduce the volume label
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# 3.1.2. Invoke [rsh] tar --listed=FILE --label=LABEL [opts] -xf $TAPE_FILE
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# 4. End
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(message 1 "Preparing for restore"
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message 1 "processing backup directories"
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for dir in ${BACKUP_DIRS}
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do
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message 1 "Processing $dir"
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case $dir in
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${PATTERN-*}) restore_fs $dir;;
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esac
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done
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if [ "x${BACKUP_FILES}" != "x" ] ; then
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message 1 "processing miscellaneous files"
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if [ -z "$PATTERN" ]; then
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restore_files
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else
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RESTORE_FILES=""
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for file in ${BACKUP_FILES}
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do
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rel_file=`expr $file : '/\(.*\)'`
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case $file in
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$PATTERN) if [ -z "$RESTORE_FILES" ]; then
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RESTORE_FILES="$rel_file"
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else
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RESTORE_FILES="$RESTORE_FILES $rel_file"
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fi;;
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esac
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done
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[ -z "$RESTORE_FILES" ] || restore_files $RESTORE_FILES
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fi
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fi) 2>&1 | tee -a "${LOGFILE}"
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# EOF
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