Dogcows Code - chaz/tar/blob - scripts/restore.in

   1 #! /bin/sh
   2 # Restore backups.
   3
   4 # Copyright 2004, 2006, 2013-2014 Free Software Foundation, Inc.
   5
   6 # This file is part of GNU tar.
   7
   8 # GNU tar is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 3 of the License, or
  11 # (at your option) any later version.
  12
  13 # GNU tar is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 # Load library routines
  22 SYSCONFDIR=${SYSCONFDIR-@sysconfdir@}
  23 . ${LIBDIR-@libexecdir@}/backup.sh
  24
  25 usage() {
  26         cat - <<EOF
  27 usage: $PROGNAME [OPTIONS] [PATTERN [PATTERN...]]
  28 Options are:
  29
  30    -a, --all               Restore all filesystems.
  31    -l, --level=LEVEL       Start restoring from the given backup LEVEL
  32                            (default $DUMP_LEVEL).
  33    -v, --verbose[=LEVEL]   Set verbosity level. Default 100.
  34
  35 Informational options:
  36    -h, --help              Display this help message.
  37    -V, --version           Display program version.
  38
  39 Send bug reports to @PACKAGE_BUGREPORT@.
  40 EOF
  41 }
  42
  43 unset PATTERN
  44 DUMP_LEVEL=0
  45 CMDLINE="$0 $@"
  46
  47 for opt
  48 do
  49   if [ -z "$prev" ]; then
  50       option=$opt
  51       optarg=`expr "x$opt" : 'x[^=]*=\(.*\)'`
  52   else
  53       option="${prev}=$opt"
  54       prev=""
  55       optarg=$opt
  56   fi
  57   case $option in
  58   -a|--a|--al|--all)
  59          RESTORE_ALL=1
  60          ;;
  61   --l=*|--le=*|--lev=*|--leve=*|--level=*)
  62          DUMP_LEVEL=$optarg
  63          ;;
  64   -l?*)  DUMP_LEVEL=`expr $option : '-l\(.*\)'`;;
  65   -l|--l|--le|--lev|--leve|--level)
  66          prev=--level
  67          ;;
  68   --verb=*|--verbo=*|--verbos=*|--verbose=*)
  69          VERBOSE=$optarg
  70          ;;
  71   -v|--verb|--verbo|--verbos|--verbose)
  72          VERBOSE=100
  73          ;;
  74   -v*)   VERBOSE=`expr $option : '-v\(.*\)'`;;
  75   -V|--v|--ve|--ver|--vers|--versi|--versio|--version)
  76          echo "restore (@PACKAGE_NAME@) @VERSION@"
  77          license
  78          exit;;
  79   -h|--h|--he|--hel|--help)
  80          usage
  81          exit;;
  82   -*) bailout "Unknown option $opt. Try $PROGNAME --help for more info.";;
  83   *)  if [ -z "$PATTERN" ]; then
  84          PATTERN=$opt
  85       else
  86          PATTERN="$PATTERN|$opt"
  87       fi
  88       ;;
  89   esac
  90 done
  91
  92 if [ -z "$RESTORE_ALL" ]; then
  93         if [ -z "$PATTERN" ]; then
  94                 usage
  95                 exit;
  96         fi
  97 fi
  98
  99 init_restore
 100 cat > $LOGFILE <<EOF
 101 This file contains any messages produced by $PROGNAME.
 102
 103 It was created by GNU $PROGNAME, from  @PACKAGE@ (@VERSION@).
 104 Invocation command line was
 105
 106   \$ $CMDLINE
 107
 108 EOF
 109
 110 restore_fs()
 111 {
 112     fs="`echo \"${1}\" | sed -e 's/^.*://'`"
 113     fs=`root_fs $fs`
 114     fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
 115     remotehost="`expr \"${1}\" : '\([^/][^/]*\):.*'`"
 116     if [ -z "$remotehost" ]; then
 117         remotehost=$localhost
 118     fi
 119     message 10 "fs=$fs"
 120     message 10 "fsname=$fsname"
 121     message 10 "remotehost=$remotehost"
 122
 123     LOGPAT="`level_log_name ${fsname} '[0-9]'`"
 124     PREFIX="`level_log_name ${fsname} ''`"
 125     message 10 LOGPAT=$LOGPAT
 126     message 10 PREFIX=$PREFIX
 127     LEVELS=`remote_run "${remotehost}" ls $LOGPAT |
 128       sed "s,$PREFIX,," | sort -n`
 129     message 10 "LEVELS=$LEVELS"
 130
 131     echo "Starting restore of ${1} at level $DUMP_LEVEL."
 132     for level in $LEVELS
 133     do
 134       if [ $level -lt $DUMP_LEVEL ]; then
 135           message 10 "Skipping level $level"
 136           continue;
 137       fi
 138       message 10 "Restoring level $level"
 139
 140       DATE=`get_dump_time $level`
 141       FILE="`level_log_name ${fsname} ${level}`"
 142       message 10 "FILE=$FILE"
 143
 144       LABEL="`print_level $level` backup of ${fs} on ${remotehost} at ${DATE}"
 145       ${RESTORE_BEGIN-:} $level $remotehost $fs $fsname
 146       backup_host ${remotehost} \
 147                   "--listed=\"$FILE\"" \
 148                   "--label=\"$LABEL\"" \
 149                   -C $fs
 150       ${RESTORE_END-:} $level $remotehost $fs $fsname
 151     done
 152 }
 153
 154 restore_files()
 155 {
 156     LOGPAT="`level_log_name MISC '[0-9]'`"
 157     PREFIX="`level_log_name MISC ''`"
 158     message 10 LOGPAT=$LOGPAT
 159     message 10 PREFIX=$PREFIX
 160     LEVELS=`remote_run "${localhost}" ls $LOGPAT | sed "s,$PREFIX,," | sort -n`
 161     message 10 "LEVELS=$LEVELS"
 162
 163     echo "Starting restore of miscellaneous files at level $DUMP_LEVEL."
 164     for level in $LEVELS
 165     do
 166       if [ $level -lt $DUMP_LEVEL ]; then
 167           message 10 "Skipping level $level"
 168           continue;
 169       fi
 170       message 10 "Restoring level $level"
 171
 172       DATE=`get_dump_time $level`
 173       FILE="`level_log_name MISC ${level}`"
 174       message 10 "FILE=$FILE"
 175
 176       LABEL="`print_level $level` backup of miscellaneous files at ${DATE}"
 177       ${RESTORE_BEGIN-:} $level $localhost MISC MISC
 178       backup_host ${localhost} \
 179                   "--listed=\"$FILE\"" \
 180                   "--label=\"$LABEL\"" \
 181                   -C ${ROOT_FS-/} $@
 182       ${RESTORE_END-:} $level $localhost MISC MISC
 183     done
 184 }
 185
 186 # Operation Overwiew:
 187 #
 188 # 1. Determine the time of the last backup
 189 # 2. Create list of incremental listings to process
 190 # 3. For each filesystem:
 191 #  3.1. Start at the requested dump level (default 0) and proceed up to
 192 #       the last available level:
 193 #   3.1.1 Deduce the volume label
 194 #   3.1.2. Invoke [rsh] tar --listed=FILE --label=LABEL [opts] -xf $TAPE_FILE
 195 # 4. End
 196
 197 (message 1 "Preparing for restore"
 198
 199 message 1 "processing backup directories"
 200
 201 for dir in ${BACKUP_DIRS}
 202 do
 203     message 1 "Processing $dir"
 204     case $dir in
 205         ${PATTERN-*}) restore_fs $dir;;
 206     esac
 207 done
 208
 209 if [ "x${BACKUP_FILES}" != "x" ] ; then
 210     message 1 "processing miscellaneous files"
 211     if [ -z "$PATTERN" ]; then
 212         restore_files
 213     else
 214         RESTORE_FILES=""
 215         for file in ${BACKUP_FILES}
 216         do
 217           rel_file=`expr $file : '/\(.*\)'`
 218           case $file in
 219               $PATTERN) if [ -z "$RESTORE_FILES" ]; then
 220                            RESTORE_FILES="$rel_file"
 221                         else
 222                            RESTORE_FILES="$RESTORE_FILES $rel_file"
 223                         fi;;
 224           esac
 225         done
 226         [ -z "$RESTORE_FILES" ] || restore_files $RESTORE_FILES
 227     fi
 228
 229 fi) 2>&1 | tee -a "${LOGFILE}"
 230
 231 # EOF