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

   1 #! /bin/sh
   2 # This program is part of GNU tar
   3 # Copyright 2004, 2005, 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 $DUMP_LEVEL).
  34    -f, --force             Force backup even if today's log file already
  35                            exists.
  36    -v, --verbose[=LEVEL]   Set verbosity level. Default 100.
  37    -t, --time=TIME         Wait till TIME, then do backup.
  38
  39 Informational options:
  40    -h, --help              Display this help message.
  41    -L, --license           Display program license.
  42    -V, --version           Display program version.
  43
  44    Optional argument WHEN is for backward compatibility only. It has been
  45    superseded by --time option.
  46    TIME argument can be one of:
  47
  48         now          --     do backup immediately.
  49         HH           --     do backup at HH hours.
  50         HH:MM        --     do backup at HH:MM.
  51
  52 Send bug reports to @PACKAGE_BUGREPORT@.
  53 EOF
  54 }
  55
  56 # For compatibility with previous versions, deduce the backup level
  57 # from the command name
  58 case "$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|--l|--le|--lev|--leve|--level)
  77          prev=$option
  78          ;;
  79   --verb=*|--verbo=*|--verbos=*|--verbose=*)
  80          VERBOSE=$optarg
  81          ;;
  82   -v|--verb|--verbo|--verbos|--verbose)
  83          VERBOSE=100
  84          ;;
  85   -v*)   VERBOSE=`expr $option : "-v\(.*\)"`;;
  86   --t=*|--ti=*|--tim=*|--time=*)
  87          TIME=$optarg
  88          ;;
  89   -t)    prev=--t;;
  90   -t*)   TIME=`expr $option : "-t\(.*\)"`;;
  91   --t|--ti|--tim|--time)
  92          prev=$option
  93          ;;
  94   -V|--v|--ve|--ver|--vers|--versi|--versio|--version)
  95          echo "backup (@PACKAGE@ @VERSION@)"
  96          exit 0;;
  97   -L|--li|--lic|--lice|--licen|--licens|--license)
  98          license
  99          exit;;
 100   -h|--h|--he|--hel|--help)
 101          usage
 102          exit;;
 103   -f|--f|--fo|--for|--forc|--force)
 104          FORCE=yes
 105          ;;
 106   *)     if [ "x$TIME" != "x" ]; then
 107             bailout "Extra argument. Try $PROGNAME --help for more info."
 108          else
 109             TIME=$option
 110          fi;;
 111   esac
 112 done
 113
 114 if [ "x$TIME" = x ]; then
 115     bailout "No backup time specified. Try $PROGNAME --help for more info."
 116     exit 1
 117 fi
 118
 119 init_backup
 120
 121 # Maybe sleep until around specified or default hour.
 122 wait_time $TIME
 123
 124 if [ $DUMP_LEVEL -ne 0 ]; then
 125     PREV_LEVEL=`expr $DUMP_LEVEL - 1`
 126     PREV_DATE=`ls -t ${LOGPATH}/log-*-level-$PREV_LEVEL|
 127                 head -n 1|
 128                 sed "s,${LOGPATH}/log-\(.*\)-level.*,\1,"`
 129     if [ "x$PREV_DATE" = x ]; then
 130         bailout "Can't determine date of the previous backup"
 131     fi
 132     message 0 "Backup from $PREV_DATE to $NOW"
 133 fi
 134
 135 # start doing things
 136
 137 # Make sure the log file did not already exist.  Create it.
 138
 139 if [ "x$FORCE" = "xyes" ]; then
 140     rm ${LOGFILE}
 141 fi
 142
 143 if [ -f "${LOGFILE}" ] ; then
 144    bailout "Log file ${LOGFILE} already exists."
 145 else
 146    touch "${LOGFILE}"
 147 fi
 148 message 1 "Ready for backup."
 149 message 10 "TAR invocation: $TAR_PART1"
 150 message 20 "Variables:"
 151 message 20 "BACKUP_DIRS=$BACKUP_DIRS"
 152 message 20 "BACKUP_FILES=$BACKUP_FILES"
 153
 154 # The buch of commands below is run in a subshell for which all output is
 155 # piped through `tee' to the logfile.  Doing this, instead of having
 156 # multiple pipelines all over the place, is cleaner and allows access to
 157 # the exit value from various commands more easily.
 158 (
 159  message 1 "preparing tapes"
 160  $MT_BEGIN "${TAPE_FILE}"
 161  rm -f "${VOLNO_FILE}"
 162
 163  message 1 "processing backup directories"
 164
 165  set - ${BACKUP_DIRS}
 166  while [ $# -ne 0 ] ; do
 167      date="`date`"
 168      fs="`echo \"${1}\" | sed -e 's/^.*://'`"
 169      fs=`root_fs $fs`
 170      fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
 171      remotehost="`expr \"${1}\" : '\([^/][^/]*\):.*'`"
 172      if [ -z "$remotehost" ]; then
 173          remotehost=$localhost
 174      fi
 175
 176      echo "Backing up ${1} at ${date}"
 177      message 10 "fs=$fs"
 178      message 10 "fsname=$fsname"
 179      message 10 "remotehost=$remotehost"
 180      if [ $DUMP_LEVEL -eq 0 ]; then
 181          make_level_log ${remotehost}
 182      else
 183          echo "Last `prev_level` dump on this filesystem was on $PREV_DATE"
 184          remote_run "${remotehost}" cp "`level_log_name ${fsname} $PREV_LEVEL`" "`level_log_name temp`"
 185      fi
 186
 187      ${DUMP_BEGIN-:} $DUMP_LEVEL $remotehost $fs $fsname
 188      backup_host ${remotehost} \
 189                 "--listed=`level_log_name temp`" \
 190                 "--label='`print_level` backup of ${fs} on ${remotehost} at ${NOW}'" \
 191                 -C ${fs} .
 192
 193      # `rsh' doesn't exit with the exit status of the remote command.  What
 194      # stupid lossage.  TODO: think of a reliable workaround.
 195      if [ $? -ne 0 ] ; then
 196          echo "Backup of ${1} failed." 1>&2
 197          # I'm assuming that the tar will have written an empty
 198          # file to the tape, otherwise I should do a cat here.
 199      else
 200          flush_level_log ${remotehost} ${fsname}
 201      fi
 202      ${MT_STATUS} "$TAPE_FILE"
 203      ${DUMP_END-:} $DUMP_LEVEL $remotehost $fs $fsname
 204      echo "sleeping ${SLEEP_TIME} seconds"
 205      sleep ${SLEEP_TIME}
 206      shift
 207  done
 208
 209  # Dump any individual files requested.
 210
 211  if [ "x${BACKUP_FILES}" != "x" ] ; then
 212      message 1 "processing individual files"
 213
 214      date="`date`"
 215
 216      if [ $DUMP_LEVEL -eq 0 ]; then
 217          make_level_log $localhost
 218      else
 219          echo "Last `prev_level` dump on this filesystem was on $PREV_DATE"
 220          remote_run "${localhost}" cp "`level_log_name MISC $PREV_LEVEL`" "`level_log_name temp`"
 221      fi
 222
 223      echo "Backing up miscellaneous files at ${date}"
 224
 225      ${DUMP_BEGIN-:} $DUMP_LEVEL $localhost MISC MISC
 226      backup_host $localhost \
 227                "--listed=`level_log_name temp`"\
 228                "--label='`print_level` backup of miscellaneous files at ${NOW}'" \
 229                ${BACKUP_FILES}
 230
 231      if [ $? -ne 0 ] ; then
 232          echo "Backup of miscellaneous files failed."
 233          # I'm assuming that the tar will have written an empty
 234          # file to the tape, otherwise I should do a cat here.
 235      else
 236          flush_level_log $localhost MISC
 237      fi
 238      ${MT_STATUS} "$TAPE_FILE"
 239      ${DUMP_END-:} $DUMP_LEVEL $localhost MISC MISC
 240  else
 241      echo "No miscellaneous files specified"
 242  fi
 243
 244  message 1 "final cleanup"
 245
 246  $MT_REWIND "${TAPE_FILE}"
 247  $MT_OFFLINE "${TAPE_FILE}"
 248  echo "."
 249 ) 2>&1 | tee -a "${LOGFILE}"
 250
 251 if test "${ADMINISTRATOR}" != NONE; then
 252      echo "Sending the dump log to ${ADMINISTRATOR}"
 253      mail -s "Results of backup started ${startdate}" ${ADMINISTRATOR} < "${LOGFILE}"
 254 fi
 255
 256 # EOF