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

   1 #! /bin/sh
   2 # This program is part of GNU tar
   3 # Copyright (C) 2004, 2005, 2006 Free Software Foundation
   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 DUMP_LEVEL=0
  25 TIME=
  26 NOW=`now`
  27
  28 usage() {
  29         cat - <<EOF
  30 usage: $PROGNAME [OPTIONS] [WHEN]
  31 Options are:
  32
  33    -l, --level=LEVEL       Do backup level LEVEL (default $DUMP_LEVEL).
  34    -f, --force             Force backup even if today's log file already
  35                            exists.
  36    -v, --verbose[=LEVEL]   Set verbosity level. Default 100.
  37    -t, --time=TIME         Wait till TIME, then do backup.
  38
  39 Informational options:
  40    -h, --help              Display this help message.
  41    -V, --version           Display program version.
  42
  43    Optional argument WHEN is for backward compatibility only. It has been
  44    superseded by --time option.
  45    TIME argument can be one of:
  46
  47         now          --     do backup immediately.
  48         HH           --     do backup at HH hours.
  49         HH:MM        --     do backup at HH:MM.
  50
  51 Send bug reports to @PACKAGE_BUGREPORT@.
  52 EOF
  53 }
  54
  55 # For compatibility with previous versions, deduce the backup level
  56 # from the command name
  57 case "$PROGNAME" in
  58 level-[0-9]) DUMP_LEVEL=`expr $PROGNAME : 'level-\([0-9][0-9]*\)'`;;
  59 esac
  60
  61 for opt
  62 do
  63   if [ -z "$prev" ]; then
  64       option=$opt
  65       optarg=`expr "x$opt" : 'x[^=]*=\(.*\)'`
  66   else
  67       option="${prev}=$opt"
  68       prev=""
  69       optarg=$opt
  70   fi
  71   case $option in
  72   --l=*|--le=*|--lev=*|--leve=*|--level=*)
  73          DUMP_LEVEL=$optarg
  74          ;;
  75   -l|--l|--le|--lev|--leve|--level)
  76          prev=$option
  77          ;;
  78   --verb=*|--verbo=*|--verbos=*|--verbose=*)
  79          VERBOSE=$optarg
  80          ;;
  81   -v|--verb|--verbo|--verbos|--verbose)
  82          VERBOSE=100
  83          ;;
  84   -v*)   VERBOSE=`expr $option : "-v\(.*\)"`;;
  85   --t=*|--ti=*|--tim=*|--time=*)
  86          TIME=$optarg
  87          ;;
  88   -t)    prev=--t;;
  89   -t*)   TIME=`expr $option : "-t\(.*\)"`;;
  90   --t|--ti|--tim|--time)
  91          prev=$option
  92          ;;
  93   -V|--v|--ve|--ver|--vers|--versi|--versio|--version)
  94          echo "backup (@PACKAGE_NAME@) @VERSION@"
  95          license
  96          exit;;
  97   -h|--h|--he|--hel|--help)
  98          usage
  99          exit;;
 100   -f|--f|--fo|--for|--forc|--force)
 101          FORCE=yes
 102          ;;
 103   *)     if [ "x$TIME" != "x" ]; then
 104             bailout "Extra argument. Try $PROGNAME --help for more info."
 105          else
 106             TIME=$option
 107          fi;;
 108   esac
 109 done
 110
 111 if [ "x$TIME" = x ]; then
 112     bailout "No backup time specified. Try $PROGNAME --help for more info."
 113     exit 1
 114 fi
 115
 116 init_backup
 117
 118 # Maybe sleep until around specified or default hour.
 119 wait_time $TIME
 120
 121 if [ $DUMP_LEVEL -ne 0 ]; then
 122     PREV_LEVEL=`expr $DUMP_LEVEL - 1`
 123     PREV_DATE=`ls -t ${LOGPATH}/log-*-level-$PREV_LEVEL|
 124                 head -n 1|
 125                 sed "s,${LOGPATH}/log-\(.*\)-level.*,\1,"`
 126     if [ "x$PREV_DATE" = x ]; then
 127         bailout "Can't determine date of the previous backup"
 128     fi
 129     message 0 "Backup from $PREV_DATE to $NOW"
 130 fi
 131
 132 # start doing things
 133
 134 # Make sure the log file did not already exist.  Create it.
 135
 136 if [ "x$FORCE" = "xyes" ]; then
 137     rm ${LOGFILE}
 138 fi
 139
 140 if [ -f "${LOGFILE}" ] ; then
 141    bailout "Log file ${LOGFILE} already exists."
 142 else
 143    touch "${LOGFILE}"
 144 fi
 145 message 1 "Ready for backup."
 146 message 10 "TAR invocation: $TAR_PART1"
 147 message 20 "Variables:"
 148 message 20 "BACKUP_DIRS=$BACKUP_DIRS"
 149 message 20 "BACKUP_FILES=$BACKUP_FILES"
 150
 151 # The buch of commands below is run in a subshell for which all output is
 152 # piped through `tee' to the logfile.  Doing this, instead of having
 153 # multiple pipelines all over the place, is cleaner and allows access to
 154 # the exit value from various commands more easily.
 155 (
 156  message 1 "preparing tapes"
 157  $MT_BEGIN "${TAPE_FILE}"
 158  rm -f "${VOLNO_FILE}"
 159
 160  message 1 "processing backup directories"
 161
 162  set - ${BACKUP_DIRS}
 163  while [ $# -ne 0 ] ; do
 164      date="`date`"
 165      fs="`echo \"${1}\" | sed -e 's/^.*://'`"
 166      fs=`root_fs $fs`
 167      fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
 168      remotehost="`expr \"${1}\" : '\([^/][^/]*\):.*'`"
 169      if [ -z "$remotehost" ]; then
 170          remotehost=$localhost
 171      fi
 172
 173      echo "Backing up ${1} at ${date}"
 174      message 10 "fs=$fs"
 175      message 10 "fsname=$fsname"
 176      message 10 "remotehost=$remotehost"
 177      if [ $DUMP_LEVEL -eq 0 ]; then
 178          make_level_log ${remotehost}
 179      else
 180          echo "Last `prev_level` dump on this filesystem was on $PREV_DATE"
 181          remote_run "${remotehost}" cp "`level_log_name ${fsname} $PREV_LEVEL`" "`level_log_name temp`"
 182      fi
 183
 184      ${DUMP_BEGIN-:} $DUMP_LEVEL $remotehost $fs $fsname
 185      backup_host ${remotehost} \
 186                 "--listed=`level_log_name temp`" \
 187                 "--label='`print_level` backup of ${fs} on ${remotehost} at ${NOW}'" \
 188                 -C ${fs} .
 189
 190      # `rsh' doesn't exit with the exit status of the remote command.  What
 191      # stupid lossage.  TODO: think of a reliable workaround.
 192      if [ $? -ne 0 ] ; then
 193          echo "Backup of ${1} failed." 1>&2
 194          # I'm assuming that the tar will have written an empty
 195          # file to the tape, otherwise I should do a cat here.
 196      else
 197          flush_level_log ${remotehost} ${fsname}
 198      fi
 199      ${MT_STATUS} "$TAPE_FILE"
 200      ${DUMP_END-:} $DUMP_LEVEL $remotehost $fs $fsname
 201      echo "sleeping ${SLEEP_TIME} seconds"
 202      sleep ${SLEEP_TIME}
 203      shift
 204  done
 205
 206  # Dump any individual files requested.
 207
 208  if [ "x${BACKUP_FILES}" != "x" ] ; then
 209      message 1 "processing individual files"
 210
 211      date="`date`"
 212
 213      if [ $DUMP_LEVEL -eq 0 ]; then
 214          make_level_log $localhost
 215      else
 216          echo "Last `prev_level` dump on this filesystem was on $PREV_DATE"
 217          remote_run "${localhost}" cp "`level_log_name MISC $PREV_LEVEL`" "`level_log_name temp`"
 218      fi
 219
 220      echo "Backing up miscellaneous files at ${date}"
 221
 222      ${DUMP_BEGIN-:} $DUMP_LEVEL $localhost MISC MISC
 223      backup_host $localhost \
 224                "--listed=`level_log_name temp`"\
 225                "--label='`print_level` backup of miscellaneous files at ${NOW}'" \
 226                ${BACKUP_FILES}
 227
 228      if [ $? -ne 0 ] ; then
 229          echo "Backup of miscellaneous files failed."
 230          # I'm assuming that the tar will have written an empty
 231          # file to the tape, otherwise I should do a cat here.
 232      else
 233          flush_level_log $localhost MISC
 234      fi
 235      ${MT_STATUS} "$TAPE_FILE"
 236      ${DUMP_END-:} $DUMP_LEVEL $localhost MISC MISC
 237  else
 238      echo "No miscellaneous files specified"
 239  fi
 240
 241  message 1 "final cleanup"
 242
 243  $MT_REWIND "${TAPE_FILE}"
 244  $MT_OFFLINE "${TAPE_FILE}"
 245  echo "."
 246 ) 2>&1 | tee -a "${LOGFILE}"
 247
 248 if test "${ADMINISTRATOR}" != NONE; then
 249      echo "Sending the dump log to ${ADMINISTRATOR}"
 250      mail -s "Results of backup started ${startdate}" ${ADMINISTRATOR} < "${LOGFILE}"
 251 fi
 252
 253 # EOF