Dogcows Code - chaz/tar/blob - scripts/level-1

   1 #!/bin/sh
   2 #
   3 # Run this script as root on the machine that has the tape drive, to make a
   4 # level-1 dump containing all files changed since the last full dump.
   5 #
   6 # If you give `now' as an argument, the dump is done immediately.
   7 # Otherwise, it waits until 1am.
   8 #
   9 # You must edit the file `backup-specs' to set the parameters for your site.
  10
  11 # Insure `mail' is in PATH.
  12 PATH="/usr/ucb:${PATH}"
  13 export PATH
  14
  15 if [ ! -w / ]; then
  16    echo "The backup must be run as root or else some files will fail to be dumped."
  17    exit 1
  18 fi
  19
  20 # Get the values of BACKUP_DIRS and BACKUP_FILES, and other variables.
  21 . ./backup-specs
  22
  23 # Maybe sleep until around specified or default hour.
  24 #
  25 if [ "${1}" != "now" ]; then
  26    if [ "${1}x" != "x" ]; then
  27       spec="${1}"
  28    else
  29       spec="${BACKUP_HOUR}"
  30    fi
  31
  32    pausetime="`date | awk '
  33      {
  34       hr = substr($4, 1, 2);
  35       mn = substr($4, 4, 2);
  36       if((hr + 0) < (spec + 0))
  37          print 3600 * (spec - hr) - 60 * mn;
  38       else
  39          print 3600 * (spec + (24 - hr)) - 60 * mn;
  40      }' spec=\"${spec}\"`"
  41
  42    clear
  43
  44    # Put your favorite message here.  We just want a screenful of obnoxious
  45    # caps warning people from messing with the dedicated terminal.
  46    awk 'BEGIN {
  47            for (i = 0; i < 30; i++)
  48               print "           D O    N O T   T O U C H   T H I S   T E R M I N A L !!!!!"
  49         }' /dev/null
  50
  51    sleep "${pausetime}"
  52 fi
  53
  54 # start doing things
  55
  56 # Put startdate in the subject line of mailed report, since if it happens
  57 # to run longer than 24 hours (as may be the case if someone forgets to put
  58 # in the next volume of the tape in adequate time), the backup date won't
  59 # appear too misleading.
  60 startdate="`date`"
  61
  62 here="`pwd`"
  63
  64 # Logfile name should be in the form  ``log-1993-03-18-full''
  65 # i.e. year-month-date.  This format is useful for sorting by name.
  66 LOGFILE=log-`date | awk '
  67    BEGIN {
  68       d["Jan"] = "01";  d["Feb"] = "02"; d["Mar"] = "03";
  69       d["Apr"] = "04";  d["May"] = "05"; d["Jun"] = "06";
  70       d["Jul"] = "07";  d["Aug"] = "08"; d["Sep"] = "09";
  71       d["Oct"] = "10";  d["Nov"] = "11"; d["Dec"] = "12";
  72    }
  73    {
  74       if ($3 < 10)
  75          $3 = "0" $3;
  76       print $6 "-" d[$2] "-" $3;
  77    }'`-level-1
  78
  79 HOST="`hostname | sed -e 's/\..*//'`"
  80
  81 TAR_PART1="/usr/local/bin/tar -c --multi-volume --one-file-system --block=${BLOCKING} --sparse --volno-file=${VOLNO_FILE}"
  82
  83 # Only use --info-script if DUMP_REMIND_SCRIPT was defined in backup-specs
  84 if [ "x${DUMP_REMIND_SCRIPT}" != "x" ]; then
  85    TAR_PART1="${TAR_PART1} --info-script=${DUMP_REMIND_SCRIPT}"
  86 fi
  87
  88 # Make sure the log file did not already exist.  Create it.
  89
  90 if [ -f "${LOGFILE}" ] ; then
  91    echo "Log file ${LOGFILE} already exists."
  92    exit 1
  93 else
  94    touch "${LOGFILE}"
  95 fi
  96
  97 # Caveat: Some version of `mt' require `-t', not `-f'.
  98 mt -f "${TAPE_FILE}" rewind
  99 rm -f "${VOLNO_FILE}"
 100
 101 set - "${BACKUP_DIRS}"
 102 while [ $# -ne 0 ] ; do
 103    host="`echo \"${1}\" | sed -e 's/:.*$//'`"
 104    fs="`echo \"${1}\" | sed -e 's/^.*://'`"
 105    date="`date`"
 106    fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
 107
 108    # This filename must be absolute; it is opened on the machine that runs tar.
 109    TAR_PART2="--listed=/etc/tar-backup/temp.level-1"
 110    TAR_PART3="--label='level 1 backup of ${fs} on ${host} at ${date}' -C ${fs} ."
 111
 112    echo "Backing up ${1} at ${date}" | tee -a "${LOGFILE}"
 113    echo "Last full dump on this filesystem:" | "tee -a ${LOGFILE}"
 114
 115    if [ "z${host}" != "z${HOST}" ] ; then
 116      rsh "${host}" "ls -l /etc/tar-backup/${fsname}.level-0; \
 117                     cp /etc/tar-backup/${fsname}.level-0 /etc/tar-backup/temp.level-1" 2>&1 \
 118       | tee -a "${LOGFILE}"
 119    else
 120      ls -l /etc/tar-backup/${fsname}.level-0 2>&1 | tee -a ${LOGFILE}
 121      cp /etc/tar-backup/${fsname}.level-0 /etc/tar-backup/temp.level-1 2>&1 | tee -a ${LOGFILE}
 122    fi
 123
 124    # Actually back things up.
 125
 126    if [ "z${host}" != "z${HOST}" ] ; then
 127       rsh "${host}" ${TAR_PART1} -f ${HOST}:${TAPE_FILE} ${TAR_PART2} ${TAR_PART3} 2>&1 \
 128        | tee -a "${LOGFILE}"
 129    else
 130       # Using `sh -c exec' causes nested quoting and shell substitution
 131       # to be handled here in the same way rsh handles it.
 132       sh -c "exec ${TAR_PART1} -f ${TAPE_FILE} ${TAR_PART2} ${TAR_PART3}" 2>&1 | tee -a "${LOGFILE}"
 133    fi
 134
 135    # This doesn't presently work, of course, because $? is set to the exit
 136    # status of the last thing in the pipeline of the previous command,
 137    # namely `tee'.  We really want the exit status of the sh command
 138    # running tar, but getting this seems to be nontrivial.  --friedman
 139    if [ $? -ne 0 ] ; then
 140       echo "Backup of ${1} failed." | tee -a "${LOGFILE}"
 141       # I'm assuming that the tar will have written an empty
 142       # file to the tape, otherwise I should do a cat here.
 143    else
 144       if [ ${HOST} != ${host} ] ; then
 145         rsh ${host} mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/${fsname}.level-1 2>&1 \
 146          | tee -a ${LOGFILE}
 147       else
 148         mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/${fsname}.level-1 2>&1 \
 149          | tee -a ${LOGFILE}
 150       fi
 151    fi
 152    ${TAPE_STATUS} | tee -a "${LOGFILE}"
 153    sleep 60
 154    shift
 155 done
 156
 157 # Dump any individual files requested.
 158
 159 if [ "x${BACKUP_FILES}" != "x" ] ; then
 160    date="`date`"
 161    TAR_PART2="--listed=/etc/tar-backup/temp.level-1"
 162    TAR_PART3="--label='Incremental backup of miscellaneous files at ${date}'"
 163
 164    echo "Backing up miscellaneous files at ${date}" | tee -a "${LOGFILE}"
 165    echo "Last full dump of these files:" | tee -a "${LOGFILE}"
 166    ls -l /etc/tar-backup/misc.level-0 2>&1 | tee -a "${LOGFILE}"
 167
 168    rm -f /etc/tar-backup/temp.level-1 2>&1 | tee -a "${LOGFILE}"
 169    cp /etc/tar-backup/misc.level-0 /etc/tar-backup/temp.level-1 2>&1 | tee -a "${LOGFILE}"
 170
 171    # Using `sh -c exec' causes nested quoting and shell substitution
 172    # to be handled here in the same way rsh handles it.
 173    sh -c "exec ${TAR_PART1} -f ${TAPE_FILE} ${TAR_PART2} ${TAR_PART3} ${BACKUP_FILES}" 2>&1 \
 174     | tee -a "${LOGFILE}"
 175
 176    # This doesn't presently work, of course, because $? is set to the exit
 177    # status of the last thing in the pipeline of the previous command,
 178    # namely `tee'.  We really want the exit status of the sh command
 179    # running tar, but getting this seems to be nontrivial.  --friedman
 180    if [ $? -ne 0 ] ; then
 181      echo "Backup of miscellaneous files failed." | tee -a "${LOGFILE}"
 182      # I'm assuming that the tar will have written an empty
 183      # file to the tape, otherwise I should do a cat here.
 184    else
 185      mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/misc.level-1 2>&1 | tee -a "${LOGFILE}"
 186    fi
 187    ${TAPE_STATUS} | tee -a "${LOGFILE}"
 188 else
 189    echo "No miscellaneous files specified" | tee -a "${LOGFILE}"
 190 fi
 191
 192 # Caveat: some versions of `mt' use `-t' instead of `-f'.
 193 mt -f "${TAPE_FILE}" rewind
 194 mt -f "${TAPE_FILE}" offl
 195
 196 echo "Sending the dump log to ${ADMINISTRATOR}"
 197 mail -s "Results of backup started ${startdate}" ${ADMINISTRATOR} < "${LOGFILE}"
 198
 199 # eof