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

   1 #! /bin/sh
   2 # This program is part of GNU tar
   3 # Copyright 2004, 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., 59 Temple Place - Suite 330, Boston, MA
  18 # 02111-1307, USA.
  19
  20 # Load library routines
  21 SYSCONFDIR=${SYSCONFDIR-@sysconfdir@}
  22 . ${LIBPATH-@libexecdir@}/backup.sh
  23
  24 now() {
  25 #IF_DATE_FORMAT_OK
  26         date +%Y-%m-%d
  27 #ELSE_DATE_FORMAT_OK
  28         LC_ALL=C date | \
  29         sed 's/[^ ]*  *\([^ ]*\)  *\([^ ]*\).* \([^ ]*\)$/\3-\1-\2/
  30             /-[0-9]$/s/\([0-9]\)$/0\1/
  31             /Jan/{s/Jan/01/p;q;}
  32             /Feb/{s/Feb/02/p;q;}
  33             /Mar/{s/Mar/03/p;q;}
  34             /Apr/{s/Apr/04/p;q;}
  35             /May/{s/May/05/p;q;}
  36             /Jun/{s/Jun/06/p;q;}
  37             /Jul/{s/Jul/07/p;q;}
  38             /Aug/{s/Aug/08/p;q;}
  39             /Sep/{s/Sep/09/p;q;}
  40             /Oct/{s/Oct/10/p;q;}
  41             /Nov/{s/Nov/11/p;q;}
  42             /Dec/{s/Dec/12/p;q;}'
  43 #ENDIF_DATE_FORMAT_OK
  44 }
  45
  46 DUMP_LEVEL=0
  47 TIME=
  48
  49 usage() {
  50         cat - <<EOF
  51 usage: $PROGNAME [OPTIONS] [WHEN]
  52 Options are:
  53
  54    -l, --level LEVEL       Do backup level LEVEL (default $DUMP_LEVEL).
  55    -f, --force             Force backup even if today's log file already
  56                            exists.
  57    -v, --verbose LEVEL     Set verbosity level.
  58    -t, --time TIME         Wait till TIME, then do backup.
  59
  60 Informational options:
  61    -h, --help              Display this help message.
  62    -l, --license           Display program license.
  63    -V, --version           Display program version.
  64
  65    Optional argumen WHEN is for backward compatibility only. It has been
  66    superseded by --time option.
  67    TIME argument can be one of:
  68
  69         now          --     do backup immediately.
  70         HH           --     do backup at HH hours.
  71         HH:MM        --     do backup at HH:MM.
  72
  73
  74    Send bug reports to @PACKAGE_BUGREPORT@.
  75 EOF
  76 }
  77
  78 # For compatibility with previous versions, deduce the backup level
  79 # from the command name
  80 case "$PROGNAME" in
  81 level-[0-9]) DUMP_LEVEL=`expr $PROGNAME : 'level-\([0-9][0-9]*\)'`;;
  82 esac
  83
  84 while [ $# -ne 0 ];
  85 do
  86     case $1 in
  87     -l|--l|--le|--lev|--leve|--level)
  88         shift
  89         DUMP_LEVEL=$1
  90         ;;
  91     -v|--verb|--verbo|--verbos|--verbose)
  92         shift
  93         VERBOSE=$1
  94         ;;
  95     -V|--v|--ve|--ver|--vers|--versi|--versio|--version)
  96         echo "backup; @PACKAGE@ (@VERSION@)"
  97         exit 0;;
  98     -L|--li|--lic|--lice|--licen|--licens|--license)
  99         license
 100         exit;;
 101     -t|--ti|--tim|--time)
 102         shift
 103         TIME=$1
 104         ;;
 105     -f|--f|--fo|--for|--forc|--force)
 106         FORCE=yes
 107         ;;
 108     -h|--h|--he|--hel|--help)
 109         usage
 110         exit;;
 111     *)  if [ "x$TIME" != "x" ]; then
 112             bailout "Extra argument. Try $PROGNAME --help for more info."
 113         else
 114             TIME=$1
 115         fi;;
 116     esac
 117     shift
 118 done
 119
 120 if [ "x$TIME" = x ]; then
 121     bailout "No backup time specified. Try $PROGNAME --help for more info."
 122     exit 1
 123 fi
 124
 125 init_backup
 126
 127 # Maybe sleep until around specified or default hour.
 128 wait_time $TIME
 129
 130 if [ $DUMP_LEVEL -ne 0 ]; then
 131     PREV_LEVEL=`expr $DUMP_LEVEL - 1`
 132     PREV_DATE=`ls -t ${LOGPATH}/log-*-level-$PREV_LEVEL|
 133                 head -1|
 134                 sed "s,${LOGPATH}/log-\(.*\)-level.*,\1,"`
 135     if [ "x$PREV_DATE" = x ]; then
 136         bailout "Can't determine date of the previous backup"
 137     fi
 138     message 0 "Backup from $PREV_DATE to $NOW"
 139 fi
 140
 141 # start doing things
 142
 143 # Make sure the log file did not already exist.  Create it.
 144
 145 if [ "x$FORCE" = "xyes" ]; then
 146     rm ${LOGFILE}
 147 fi
 148
 149 if [ -f "${LOGFILE}" ] ; then
 150    bailout "Log file ${LOGFILE} already exists."
 151 else
 152    touch "${LOGFILE}"
 153 fi
 154 message 1 "Ready for backup."
 155 message 10 "TAR invocation: $TAR_PART1"
 156 message 20 "Variables:"
 157 message 20 "BACKUP_DIRS=$BACKUP_DIRS"
 158 message 20 "BACKUP_FILES=$BACKUP_FILES"
 159
 160 # The buch of commands below is run in a subshell for which all output is
 161 # piped through `tee' to the logfile.  Doing this, instead of having
 162 # multiple pipelines all over the place, is cleaner and allows access to
 163 # the exit value from various commands more easily.
 164 (
 165  message 1 "preparing tapes"
 166  $MT_BEGIN "${TAPE_FILE}"
 167  rm -f "${VOLNO_FILE}"
 168
 169  message 1 "processing backup directories"
 170
 171  set - ${BACKUP_DIRS}
 172  while [ $# -ne 0 ] ; do
 173     date="`date`"
 174     fs="`echo \"${1}\" | sed -e 's/^.*://'`"
 175     fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
 176     remotehost="`expr \"${1}\" : '\([^/][^/]*\):.*'`"
 177     if [ -z "$remotehost" ]; then
 178         remotehost=$localhost
 179     fi
 180
 181     echo "Backing up ${1} at ${date}"
 182     message 10 "fs=$fs"
 183     message 10 "fsname=$fsname"
 184     message 10 "remotehost=$remotehost"
 185     if [ $DUMP_LEVEL -eq 0 ]; then
 186         make_level_log ${remotehost}
 187     else
 188         LF=`level_log_name ${fsname} 0`
 189         pdate=`remote_run "${remotehost}" ls -l $LF | awk '{
 190             printf("%s", $6)
 191             for (i=7;i<NF;i++)
 192                 printf(" %s", $i)
 193             print "" }'`
 194         echo "Last `prev_level` dump on this filesystem was on $pdate"
 195         remote_run "${remotehost}" cp $LF "`level_log_name temp`"
 196     fi
 197
 198     backup_host ${remotehost} \
 199                 "--listed=`level_log_name temp`" \
 200                 "--label='`print_level` backup of ${fs} on ${remotehost} at ${date}'" \
 201                 -C ${fs} .
 202
 203     # `rsh' doesn't exit with the exit status of the remote command.  What
 204     # stupid lossage.  TODO: think of a reliable workaround.
 205     if [ $? -ne 0 ] ; then
 206        echo "Backup of ${1} failed." 1>&2
 207        # I'm assuming that the tar will have written an empty
 208        # file to the tape, otherwise I should do a cat here.
 209     else
 210        flush_level_log ${remotehost} ${fsname}
 211     fi
 212     ${MT_STATUS}
 213     echo "sleeping ${SLEEP_TIME} seconds"
 214     sleep ${SLEEP_TIME}
 215     shift
 216  done
 217
 218  # Dump any individual files requested.
 219
 220  if [ "x${BACKUP_FILES}" != "x" ] ; then
 221     message 1 "processing individual files"
 222
 223     date="`date`"
 224
 225     make_level_log $localhost
 226
 227     echo "Backing up miscellaneous files at ${date}"
 228
 229     backup_host $localhost \
 230                "--listed=`level_log_name temp`"\
 231                "--label='`print_level` backup of miscellaneous files at ${date}'" \
 232                ${BACKUP_FILES}
 233
 234     if [ $? -ne 0 ] ; then
 235         echo "Backup of miscellaneous files failed."
 236         # I'm assuming that the tar will have written an empty
 237         # file to the tape, otherwise I should do a cat here.
 238     else
 239         flush_level_log $localhost
 240     fi
 241     ${MT_STATUS}
 242  else
 243     echo "No miscellaneous files specified"
 244  fi
 245
 246  message 1 "final cleanup"
 247
 248  $MT_REWIND "${TAPE_FILE}"
 249  $MT_OFFLINE "${TAPE_FILE}"
 250
 251 ) 2>&1 | tee -a "${LOGFILE}"
 252
 253 echo "Sending the dump log to ${ADMINISTRATOR}"
 254 mail -s "Results of backup started ${startdate}" ${ADMINISTRATOR} < "${LOGFILE}"
 255
 256 # eof