scripts/restore.in

   1 #! /bin/sh
   2 # This program is part of GNU tar
   3 # Copyright (C) 2004, 2006 Free Software Foundation, Inc.
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 1, or (at your option)
   8 # any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18 # 02110-1301, USA.
  19
  20 # Load library routines
  21 SYSCONFDIR=${SYSCONFDIR-@sysconfdir@}
  22 . ${LIBDIR-@libexecdir@}/backup.sh
  23
  24 usage() {
  25         cat - <<EOF
  26 usage: $PROGNAME [OPTIONS] [PATTERN [PATTERN...]]
  27 Options are:
  28
  29    -a, --all               Restore all filesystems.
  30    -l, --level=LEVEL       Start restoring from the given backup LEVEL
  31                            (default $DUMP_LEVEL).
  32    -v, --verbose[=LEVEL]   Set verbosity level. Default 100.
  33
  34 Informational options:
  35    -h, --help              Display this help message.
  36    -V, --version           Display program version.
  37
  38 Send bug reports to @PACKAGE_BUGREPORT@.
  39 EOF
  40 }
  41
  42 unset PATTERN
  43 DUMP_LEVEL=0
  44 CMDLINE="$0 $@"
  45
  46 for opt
  47 do
  48   if [ -z "$prev" ]; then
  49       option=$opt
  50       optarg=`expr "x$opt" : 'x[^=]*=\(.*\)'`
  51   else
  52       option="${prev}=$opt"
  53       prev=""
  54       optarg=$opt
  55   fi
  56   case $option in
  57   -a|--a|--al|--all)
  58          RESTORE_ALL=1
  59          ;;
  60   --l=*|--le=*|--lev=*|--leve=*|--level=*)
  61          DUMP_LEVEL=$optarg
  62          ;;
  63   -l|--l|--le|--lev|--leve|--level)
  64          prev=$option
  65          ;;
  66   --verb=*|--verbo=*|--verbos=*|--verbose=*)
  67          VERBOSE=$optarg
  68          ;;
  69   -v|--verb|--verbo|--verbos|--verbose)
  70          VERBOSE=100
  71          ;;
  72   -v*)   VERBOSE=`expr $option : "-v\(.*\)"`;;
  73   -V|--v|--ve|--ver|--vers|--versi|--versio|--version)
  74          echo "restore (@PACKAGE_NAME@) @VERSION@"
  75          license
  76          exit;;
  77   -h|--h|--he|--hel|--help)
  78          usage
  79          exit;;
  80   -*) bailout "Unknown option $opt. Try $PROGNAME --help for more info.";;
  81   *)  if [ -z "$PATTERN" ]; then
  82          PATTERN=$opt
  83       else
  84          PATTERN="$PATTERN|$opt"
  85       fi
  86       ;;
  87   esac
  88 done
  89
  90 if [ -z "$RESTORE_ALL" ]; then
  91         if [ -z "$PATTERN" ]; then
  92                 usage
  93                 exit;
  94         fi
  95 fi
  96
  97 init_restore
  98 cat > $LOGFILE <<EOF
  99 This file contains any messages produced by $PROGNAME.
 100
 101 It was created by GNU $PROGNAME, from  @PACKAGE@ (@VERSION@).
 102 Invocation command line was
 103
 104   \$ $CMDLINE
 105
 106 EOF
 107
 108 restore_fs()
 109 {
 110     fs="`echo \"${1}\" | sed -e 's/^.*://'`"
 111     fs=`root_fs $fs`
 112     fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
 113     remotehost="`expr \"${1}\" : '\([^/][^/]*\):.*'`"
 114     if [ -z "$remotehost" ]; then
 115         remotehost=$localhost
 116     fi
 117     message 10 "fs=$fs"
 118     message 10 "fsname=$fsname"
 119     message 10 "remotehost=$remotehost"
 120
 121     LOGPAT="`level_log_name ${fsname} '[0-9]'`"
 122     PREFIX="`level_log_name ${fsname} ''`"
 123     message 10 LOGPAT=$LOGPAT
 124     message 10 PREFIX=$PREFIX
 125     LEVELS=`remote_run "${remotehost}" ls $LOGPAT |
 126       sed "s,$PREFIX,," | sort -n`
 127     message 10 "LEVELS=$LEVELS"
 128
 129     echo "Starting restore of ${1} at level $DUMP_LEVEL."
 130     for level in $LEVELS
 131     do
 132       if [ $level -lt $DUMP_LEVEL ]; then
 133           message 10 "Skipping level $level"
 134           continue;
 135       fi
 136       message 10 "Restoring level $level"
 137
 138       DATE=`get_dump_time $level`
 139       FILE="`level_log_name ${fsname} ${level}`"
 140       message 10 "FILE=$FILE"
 141
 142       LABEL="`print_level $level` backup of ${fs} on ${remotehost} at ${DATE}"
 143       ${RESTORE_BEGIN-:} $level $remotehost $fs $fsname
 144       backup_host ${remotehost} \
 145                   "--listed=\"$FILE\"" \
 146                   "--label=\"$LABEL\"" \
 147                   -C $fs
 148       ${RESTORE_END-:} $level $remotehost $fs $fsname
 149     done
 150 }
 151
 152 restore_files()
 153 {
 154     LOGPAT="`level_log_name MISC '[0-9]'`"
 155     PREFIX="`level_log_name MISC ''`"
 156     message 10 LOGPAT=$LOGPAT
 157     message 10 PREFIX=$PREFIX
 158     LEVELS=`remote_run "${localhost}" ls $LOGPAT | sed "s,$PREFIX,," | sort -n`
 159     message 10 "LEVELS=$LEVELS"
 160
 161     echo "Starting restore of miscellaneous files at level $DUMP_LEVEL."
 162     for level in $LEVELS
 163     do
 164       if [ $level -lt $DUMP_LEVEL ]; then
 165           message 10 "Skipping level $level"
 166           continue;
 167       fi
 168       message 10 "Restoring level $level"
 169
 170       DATE=`get_dump_time $level`
 171       FILE="`level_log_name MISC ${level}`"
 172       message 10 "FILE=$FILE"
 173
 174       LABEL="`print_level $level` backup of miscellaneous files at ${DATE}"
 175       ${RESTORE_BEGIN-:} $level $localhost MISC MISC
 176       backup_host ${localhost} \
 177                   "--listed=\"$FILE\"" \
 178                   "--label=\"$LABEL\"" \
 179                   -C ${ROOT_FS-/} $@
 180       ${RESTORE_END-:} $level $localhost MISC MISC
 181     done
 182 }
 183
 184 # Operation Overwiew:
 185 #
 186 # 1. Determine the time of the last backup
 187 # 2. Create list of incremental listings to process
 188 # 3. For each filesystem:
 189 #  3.1. Start at the requested dump level (default 0) and proceed up to
 190 #       the last available level:
 191 #   3.1.1 Deduce the volume label
 192 #   3.1.2. Invoke [rsh] tar --listed=FILE --label=LABEL [opts] -xf $TAPE_FILE
 193 # 4. End
 194
 195 (message 1 "Preparing for restore"
 196
 197 message 1 "processing backup directories"
 198
 199 for dir in ${BACKUP_DIRS}
 200 do
 201     message 1 "Processing $dir"
 202     case $dir in
 203         ${PATTERN-*}) restore_fs $dir;;
 204     esac
 205 done
 206
 207 if [ "x${BACKUP_FILES}" != "x" ] ; then
 208     message 1 "processing miscellaneous files"
 209     if [ -z "$PATTERN" ]; then
 210         restore_files
 211     else
 212         RESTORE_FILES=""
 213         for file in ${BACKUP_FILES}
 214         do
 215           rel_file=`expr $file : '/\(.*\)'`
 216           case $file in
 217               $PATTERN) if [ -z "$RESTORE_FILES" ]; then
 218                            RESTORE_FILES="$rel_file"
 219                         else
 220                            RESTORE_FILES="$RESTORE_FILES $rel_file"
 221                         fi;;
 222           esac
 223         done
 224         [ -z "$RESTORE_FILES" ] || restore_files $RESTORE_FILES
 225     fi
 226
 227 fi) 2>&1 | tee -a "${LOGFILE}"
 228
 229 # EOF