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

   1 #! /bin/sh
   2 # Make backups.
   3
   4 # Copyright 2004-2006, 2013 Free Software Foundation
   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 DUMP_LEVEL=0
  26 TIME=
  27 NOW=`now`
  28
  29 usage() {
  30         cat - <<EOF
  31 usage: $PROGNAME [OPTIONS] [WHEN]
  32 Options are:
  33
  34    -l, --level=LEVEL       Do backup level LEVEL (default $DUMP_LEVEL).
  35    -f, --force             Force backup even if today's log file already
  36                            exists.
  37    -v, --verbose[=LEVEL]   Set verbosity level. Default 100.
  38    -t, --time=TIME         Wait till TIME, then do backup.
  39
  40 Informational options:
  41    -h, --help              Display this help message.
  42    -V, --version           Display program version.
  43
  44    Optional argument WHEN is for backward compatibility only. It has been
  45    superseded by --time option.
  46    TIME argument can be one of:
  47
  48         now          --     do backup immediately.
  49         HH           --     do backup at HH hours.
  50         HH:MM        --     do backup at HH:MM.
  51
  52 Send bug reports to @PACKAGE_BUGREPORT@.
  53 EOF
  54 }
  55
  56 # For compatibility with previous versions, deduce the backup level
  57 # from the command name
  58 case "$PROGNAME" in
  59 level-[0-9]) DUMP_LEVEL=`expr $PROGNAME : 'level-\([0-9][0-9]*\)'`;;
  60 esac
  61
  62 for opt
  63 do
  64   if [ -z "$prev" ]; then
  65       option=$opt
  66       optarg=`expr "x$opt" : 'x[^=]*=\(.*\)'`
  67   else
  68       option="${prev}=$opt"
  69       prev=""
  70       optarg=$opt
  71   fi
  72   case $option in
  73   --l=*|--le=*|--lev=*|--leve=*|--level=*)
  74          DUMP_LEVEL=$optarg
  75          ;;
  76   -l?*)  DUMP_LEVEL=`expr $option : '-l\(.*\)'`;;
  77   -l|--l|--le|--lev|--leve|--level)
  78          prev=--level
  79          ;;
  80   --verb=*|--verbo=*|--verbos=*|--verbose=*)
  81          VERBOSE=$optarg
  82          ;;
  83   -v|--verb|--verbo|--verbos|--verbose)
  84          VERBOSE=100
  85          ;;
  86   -v*)   VERBOSE=`expr $option : '-v\(.*\)'`;;
  87   --t=*|--ti=*|--tim=*|--time=*)
  88          TIME=$optarg
  89          ;;
  90   -t?*)  TIME=`expr $option : '-t\(.*\)'`;;
  91   -t|--t|--ti|--tim|--time)
  92          prev=--time
  93          ;;
  94   -V|--v|--ve|--ver|--vers|--versi|--versio|--version)
  95          echo "backup (@PACKAGE_NAME@) @VERSION@"
  96          license
  97          exit;;
  98   -h|--h|--he|--hel|--help)
  99          usage
 100          exit;;
 101   -f|--f|--fo|--for|--forc|--force)
 102          FORCE=yes
 103          ;;
 104   *)     if [ "x$TIME" != "x" ]; then
 105             bailout "Extra argument. Try $PROGNAME --help for more info."
 106          else
 107             TIME=$option
 108          fi;;
 109   esac
 110 done
 111
 112 if [ "x$TIME" = x ]; then
 113     bailout "No backup time specified. Try $PROGNAME --help for more info."
 114     exit 1
 115 fi
 116
 117 init_backup
 118
 119 # Maybe sleep until around specified or default hour.
 120 wait_time $TIME
 121
 122 if [ $DUMP_LEVEL -ne 0 ]; then
 123     PREV_LEVEL=`expr $DUMP_LEVEL - 1`
 124     PREV_DATE=`ls -t ${LOGPATH}/log-*-level-$PREV_LEVEL|
 125                 head -n 1|
 126                 sed "s,${LOGPATH}/log-\(.*\)-level.*,\1,"`
 127     if [ "x$PREV_DATE" = x ]; then
 128         bailout "Can't determine date of the previous backup"
 129     fi
 130     message 0 "Backup from $PREV_DATE to $NOW"
 131 fi
 132
 133 # start doing things
 134
 135 # Make sure the log file did not already exist.  Create it.
 136
 137 if [ "x$FORCE" = "xyes" ]; then
 138     rm ${LOGFILE}
 139 fi
 140
 141 if [ -f "${LOGFILE}" ] ; then
 142    bailout "Log file ${LOGFILE} already exists."
 143 else
 144    touch "${LOGFILE}"
 145 fi
 146 message 1 "Ready for backup."
 147 message 10 "TAR invocation: $TAR_PART1"
 148 message 20 "Variables:"
 149 message 20 "BACKUP_DIRS=$BACKUP_DIRS"
 150 message 20 "BACKUP_FILES=$BACKUP_FILES"
 151
 152 # The buch of commands below is run in a subshell for which all output is
 153 # piped through 'tee' to the logfile.  Doing this, instead of having
 154 # multiple pipelines all over the place, is cleaner and allows access to
 155 # the exit value from various commands more easily.
 156 (
 157  message 1 "preparing tapes"
 158  $MT_BEGIN "${TAPE_FILE}"
 159  rm -f "${VOLNO_FILE}"
 160
 161  message 1 "processing backup directories"
 162
 163  set - ${BACKUP_DIRS}
 164  while [ $# -ne 0 ] ; do
 165      date="`date`"
 166      fs="`echo \"${1}\" | sed -e 's/^.*://'`"
 167      fs=`root_fs $fs`
 168      fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
 169      remotehost="`expr \"${1}\" : '\([^/][^/]*\):.*'`"
 170      if [ -z "$remotehost" ]; then
 171          remotehost=$localhost
 172      fi
 173
 174      echo "Backing up ${1} at ${date}"
 175      message 10 "fs=$fs"
 176      message 10 "fsname=$fsname"
 177      message 10 "remotehost=$remotehost"
 178      if [ $DUMP_LEVEL -eq 0 ]; then
 179          make_level_log ${remotehost}
 180      else
 181          echo "Last `prev_level` dump on this filesystem was on $PREV_DATE"
 182          remote_run "${remotehost}" cp "`level_log_name ${fsname} $PREV_LEVEL`" "`level_log_name temp`"
 183      fi
 184
 185      ${DUMP_BEGIN-:} $DUMP_LEVEL $remotehost $fs $fsname
 186      backup_host ${remotehost} \
 187                 "--listed=`level_log_name temp`" \
 188                 "--label='`print_level` backup of ${fs} on ${remotehost} at ${NOW}'" \
 189                 -C ${fs} .
 190
 191      # 'rsh' doesn't exit with the exit status of the remote command.  What
 192      # stupid lossage.  TODO: think of a reliable workaround.
 193      if [ $? -ne 0 ] ; then
 194          echo "Backup of ${1} failed." 1>&2
 195          # I'm assuming that the tar will have written an empty
 196          # file to the tape, otherwise I should do a cat here.
 197      else
 198          flush_level_log ${remotehost} ${fsname}
 199      fi
 200      ${MT_STATUS} "$TAPE_FILE"
 201      ${DUMP_END-:} $DUMP_LEVEL $remotehost $fs $fsname
 202      echo "sleeping ${SLEEP_TIME} seconds"
 203      sleep ${SLEEP_TIME}
 204      shift
 205  done
 206
 207  # Dump any individual files requested.
 208
 209  if [ "x${BACKUP_FILES}" != "x" ] ; then
 210      message 1 "processing individual files"
 211
 212      date="`date`"
 213
 214      if [ $DUMP_LEVEL -eq 0 ]; then
 215          make_level_log $localhost
 216      else
 217          echo "Last `prev_level` dump on this filesystem was on $PREV_DATE"
 218          remote_run "${localhost}" cp "`level_log_name MISC $PREV_LEVEL`" "`level_log_name temp`"
 219      fi
 220
 221      echo "Backing up miscellaneous files at ${date}"
 222
 223      ${DUMP_BEGIN-:} $DUMP_LEVEL $localhost MISC MISC
 224      backup_host $localhost \
 225                "--listed=`level_log_name temp`"\
 226                "--label='`print_level` backup of miscellaneous files at ${NOW}'" \
 227                ${BACKUP_FILES}
 228
 229      if [ $? -ne 0 ] ; then
 230          echo "Backup of miscellaneous files failed."
 231          # I'm assuming that the tar will have written an empty
 232          # file to the tape, otherwise I should do a cat here.
 233      else
 234          flush_level_log $localhost MISC
 235      fi
 236      ${MT_STATUS} "$TAPE_FILE"
 237      ${DUMP_END-:} $DUMP_LEVEL $localhost MISC MISC
 238  else
 239      echo "No miscellaneous files specified"
 240  fi
 241
 242  message 1 "final cleanup"
 243
 244  $MT_REWIND "${TAPE_FILE}"
 245  $MT_OFFLINE "${TAPE_FILE}"
 246  echo "."
 247 ) 2>&1 | tee -a "${LOGFILE}"
 248
 249 if test "${ADMINISTRATOR}" != NONE; then
 250      echo "Sending the dump log to ${ADMINISTRATOR}"
 251      mail -s "Results of backup started ${startdate}" ${ADMINISTRATOR} < "${LOGFILE}"
 252 fi
 253
 254 # EOF