Dogcows Code - chaz/tar/blob - 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?*)  DUMP_LEVEL=`expr $option : '-l\(.*\)'`;;
  64   -l|--l|--le|--lev|--leve|--level)
  65          prev=--level
  66          ;;
  67   --verb=*|--verbo=*|--verbos=*|--verbose=*)
  68          VERBOSE=$optarg
  69          ;;
  70   -v|--verb|--verbo|--verbos|--verbose)
  71          VERBOSE=100
  72          ;;
  73   -v*)   VERBOSE=`expr $option : '-v\(.*\)'`;;
  74   -V|--v|--ve|--ver|--vers|--versi|--versio|--version)
  75          echo "restore (@PACKAGE_NAME@) @VERSION@"
  76          license
  77          exit;;
  78   -h|--h|--he|--hel|--help)
  79          usage
  80          exit;;
  81   -*) bailout "Unknown option $opt. Try $PROGNAME --help for more info.";;
  82   *)  if [ -z "$PATTERN" ]; then
  83          PATTERN=$opt
  84       else
  85          PATTERN="$PATTERN|$opt"
  86       fi
  87       ;;
  88   esac
  89 done
  90
  91 if [ -z "$RESTORE_ALL" ]; then
  92         if [ -z "$PATTERN" ]; then
  93                 usage
  94                 exit;
  95         fi
  96 fi
  97
  98 init_restore
  99 cat > $LOGFILE <<EOF
 100 This file contains any messages produced by $PROGNAME.
 101
 102 It was created by GNU $PROGNAME, from  @PACKAGE@ (@VERSION@).
 103 Invocation command line was
 104
 105   \$ $CMDLINE
 106
 107 EOF
 108
 109 restore_fs()
 110 {
 111     fs="`echo \"${1}\" | sed -e 's/^.*://'`"
 112     fs=`root_fs $fs`
 113     fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
 114     remotehost="`expr \"${1}\" : '\([^/][^/]*\):.*'`"
 115     if [ -z "$remotehost" ]; then
 116         remotehost=$localhost
 117     fi
 118     message 10 "fs=$fs"
 119     message 10 "fsname=$fsname"
 120     message 10 "remotehost=$remotehost"
 121
 122     LOGPAT="`level_log_name ${fsname} '[0-9]'`"
 123     PREFIX="`level_log_name ${fsname} ''`"
 124     message 10 LOGPAT=$LOGPAT
 125     message 10 PREFIX=$PREFIX
 126     LEVELS=`remote_run "${remotehost}" ls $LOGPAT |
 127       sed "s,$PREFIX,," | sort -n`
 128     message 10 "LEVELS=$LEVELS"
 129
 130     echo "Starting restore of ${1} at level $DUMP_LEVEL."
 131     for level in $LEVELS
 132     do
 133       if [ $level -lt $DUMP_LEVEL ]; then
 134           message 10 "Skipping level $level"
 135           continue;
 136       fi
 137       message 10 "Restoring level $level"
 138
 139       DATE=`get_dump_time $level`
 140       FILE="`level_log_name ${fsname} ${level}`"
 141       message 10 "FILE=$FILE"
 142
 143       LABEL="`print_level $level` backup of ${fs} on ${remotehost} at ${DATE}"
 144       ${RESTORE_BEGIN-:} $level $remotehost $fs $fsname
 145       backup_host ${remotehost} \
 146                   "--listed=\"$FILE\"" \
 147                   "--label=\"$LABEL\"" \
 148                   -C $fs
 149       ${RESTORE_END-:} $level $remotehost $fs $fsname
 150     done
 151 }
 152
 153 restore_files()
 154 {
 155     LOGPAT="`level_log_name MISC '[0-9]'`"
 156     PREFIX="`level_log_name MISC ''`"
 157     message 10 LOGPAT=$LOGPAT
 158     message 10 PREFIX=$PREFIX
 159     LEVELS=`remote_run "${localhost}" ls $LOGPAT | sed "s,$PREFIX,," | sort -n`
 160     message 10 "LEVELS=$LEVELS"
 161
 162     echo "Starting restore of miscellaneous files at level $DUMP_LEVEL."
 163     for level in $LEVELS
 164     do
 165       if [ $level -lt $DUMP_LEVEL ]; then
 166           message 10 "Skipping level $level"
 167           continue;
 168       fi
 169       message 10 "Restoring level $level"
 170
 171       DATE=`get_dump_time $level`
 172       FILE="`level_log_name MISC ${level}`"
 173       message 10 "FILE=$FILE"
 174
 175       LABEL="`print_level $level` backup of miscellaneous files at ${DATE}"
 176       ${RESTORE_BEGIN-:} $level $localhost MISC MISC
 177       backup_host ${localhost} \
 178                   "--listed=\"$FILE\"" \
 179                   "--label=\"$LABEL\"" \
 180                   -C ${ROOT_FS-/} $@
 181       ${RESTORE_END-:} $level $localhost MISC MISC
 182     done
 183 }
 184
 185 # Operation Overwiew:
 186 #
 187 # 1. Determine the time of the last backup
 188 # 2. Create list of incremental listings to process
 189 # 3. For each filesystem:
 190 #  3.1. Start at the requested dump level (default 0) and proceed up to
 191 #       the last available level:
 192 #   3.1.1 Deduce the volume label
 193 #   3.1.2. Invoke [rsh] tar --listed=FILE --label=LABEL [opts] -xf $TAPE_FILE
 194 # 4. End
 195
 196 (message 1 "Preparing for restore"
 197
 198 message 1 "processing backup directories"
 199
 200 for dir in ${BACKUP_DIRS}
 201 do
 202     message 1 "Processing $dir"
 203     case $dir in
 204         ${PATTERN-*}) restore_fs $dir;;
 205     esac
 206 done
 207
 208 if [ "x${BACKUP_FILES}" != "x" ] ; then
 209     message 1 "processing miscellaneous files"
 210     if [ -z "$PATTERN" ]; then
 211         restore_files
 212     else
 213         RESTORE_FILES=""
 214         for file in ${BACKUP_FILES}
 215         do
 216           rel_file=`expr $file : '/\(.*\)'`
 217           case $file in
 218               $PATTERN) if [ -z "$RESTORE_FILES" ]; then
 219                            RESTORE_FILES="$rel_file"
 220                         else
 221                            RESTORE_FILES="$RESTORE_FILES $rel_file"
 222                         fi;;
 223           esac
 224         done
 225         [ -z "$RESTORE_FILES" ] || restore_files $RESTORE_FILES
 226     fi
 227
 228 fi) 2>&1 | tee -a "${LOGFILE}"
 229
 230 # EOF