Dogcows Code - chaz/tar/blob - scripts/level-0

   1 #!/bin/sh
   2 #
   3 # Run this script as root on the machine that has the tape drive, to make a
   4 # full dump.
   5 #
   6 # If you give `now' as an argument, the dump is done immediately.
   7 # Otherwise, it waits until 1am, or until the hour given as argument.
   8 # Specify the hour as a number from 0 to 23.
   9 #
  10 # You must edit the file `backup-specs' to set the parameters for your site.
  11
  12 if [ ! -w / ]; then
  13    echo The backup must be run as root or else some files will fail to be dumped.
  14    exit 1
  15 else
  16    false
  17 fi
  18
  19 # Get the values of BACKUP_DIRS and BACKUP_FILES, and other variables.
  20 . ./backup-specs
  21
  22 # Maybe sleep until around specified or default hour.
  23 #
  24 if [ "${1}" != "now" ]; then
  25    if [ "${1}x" != "x" ]; then
  26       spec="${1}"
  27    else
  28       spec="${BACKUP_HOUR}"
  29    fi
  30    pausetime=`date | awk '{hr=substr($4,1,2);\\
  31       mn=substr($4,4,2);\\
  32       if((hr+0)<(spec+0))\\
  33          print 3600*(spec-hr)-60*mn;\\
  34       else\\
  35          print 3600*(spec+(24-hr))-60*mn; }' spec=$spec`
  36    clear
  37    cat ./dont_touch
  38    sleep ${pausetime}
  39 fi
  40
  41 # start doing things
  42
  43 here=`pwd`
  44 LOGFILE=log-`date | awk '{print $2 "-" $3 "-" $6}'`-full
  45 HOST=`hostname | sed 's/\..*//'`
  46 TAR_PART1="/usr/local/bin/tar -c --multi-volume --one-file-system --block=${BLOCKING} --sparse --volno-file=${VOLNO_FILE}"
  47
  48 # Only use --info-script if DUMP_REMIND_SCRIPT was defined in backup-specs
  49 if [ x != "x${DUMP_REMIND_SCRIPT}" ]; then
  50    TAR_PART1="${TAR_PART1} --info-script=${DUMP_REMIND_SCRIPT}"
  51 fi
  52
  53 # Make sure the log file did not already exist.  Create it.
  54
  55 if [ -f ${LOGFILE} ] ; then
  56    echo Log file ${LOGFILE} already exists.
  57    exit 1
  58 else
  59    touch ${LOGFILE}
  60 fi
  61
  62 mt -f ${TAPE_FILE} rewind
  63 rm ${VOLNO_FILE}
  64
  65 set ${BACKUP_DIRS}
  66 while [ $# -ne 0 ] ; do
  67    host=`echo ${1} | sed 's/:.*$//'`
  68    fs=`echo ${1} | sed 's/^.*://'`
  69    date=`date`
  70    fsname=`echo $1 | sed 's/\//:/g'`
  71
  72    TAR_PART2="--listed=/etc/tar-backup/temp.level-0"
  73    TAR_PART3="--label='Full backup of ${fs} on ${host} at ${date}' -C ${fs} ."
  74
  75    echo Backing up ${1} at ${date} | tee -a ${LOGFILE}
  76
  77    # Actually back things up.
  78
  79    if [ ${HOST} != ${host} ] ; then
  80       # Removed 2>&1/dev/null cruft since that's incorrect sh syntax.
  81       rsh ${host} mkdir /etc/tar-backup > /dev/null 2>&1
  82       rsh ${host} rm -f /etc/tar-backup/temp.level-0
  83       rsh ${host} ${TAR_PART1} -f ${HOST}:${TAPE_FILE} ${TAR_PART2} ${TAR_PART3} 2>&1 | tee -a ${LOGFILE}
  84    else
  85       mkdir /etc/tar-backup > /dev/null 2>&1
  86       rm -f /etc/tar-backup/temp.level-0
  87 # Using `sh -c exec' causes nested quoting and shell substitution
  88 # to be handled here in the same way rsh handles it.
  89       sh -c "exec ${TAR_PART1} -f ${TAPE_FILE} ${TAR_PART2} ${TAR_PART3}" 2>&1 | tee -a ${LOGFILE}
  90    fi
  91    # This doesn't presently work, of course, because $? is set to the exit
  92    # status of the last thing in the pipeline of the previous command,
  93    # namely `tee'.  We really want the exit status of the sh command
  94    # running tar, but getting this seems to be nontrivial.  --friedman
  95    if [ $? -ne 0 ] ; then
  96       echo Backup of ${1} failed. | tee -a ${LOGFILE}
  97       # I'm assuming that the tar will have written an empty
  98       # file to the tape, otherwise I should do a cat here.
  99    else
 100       if [ ${HOST} != ${host} ] ; then
 101         rsh ${host} "mv -f /etc/tar-backup/temp.level-0 /etc/tar-backup/${fsname}.level-0" 2>&1 | tee -a ${LOGFILE}
 102       else
 103         mv -f /etc/tar-backup/temp.level-0 /etc/tar-backup/${fsname}.level-0 2>&1 | tee -a ${LOGFILE}
 104       fi
 105    fi
 106    ${TAPE_STATUS} | tee -a ${LOGFILE}
 107    sleep 60
 108    shift
 109 done
 110
 111 # Dump any individual files requested.
 112
 113 if [ x != "x${BACKUP_FILES}" ] ; then
 114    date=`date`
 115
 116    TAR_PART2="--listed=/etc/tar-backup/temp.level-0"
 117    TAR_PART3="--label='Full backup of miscellaneous files at ${date}'"
 118
 119    mkdir /etc/tar-backup > /dev/null 2>&1
 120    rm -f /etc/tar-backup/temp.level-0
 121
 122    echo Backing up miscellaneous files at ${date} | tee -a ${LOGFILE}
 123 # Using `sh -c exec' causes nested quoting and shell substitution
 124 # to be handled here in the same way rsh handles it.
 125    sh -c "exec ${TAR_PART1} -f ${TAPE_FILE} ${TAR_PART2} ${TAR_PART3} \
 126     ${BACKUP_FILES}" 2>&1 | tee -a ${LOGFILE}
 127    # This doesn't presently work, of course, because $? is set to the exit
 128    # status of the last thing in the pipeline of the previous command,
 129    # namely `tee'.  We really want the exit status of the sh command
 130    # running tar, but getting this seems to be nontrivial.  --friedman
 131    if [ $? -ne 0 ] ; then
 132      echo Backup of miscellaneous files failed. | tee -a ${LOGFILE}
 133      # I'm assuming that the tar will have written an empty
 134      # file to the tape, otherwise I should do a cat here.
 135    else
 136      mv -f /etc/tar-backup/temp.level-0 /etc/tar-backup/misc.level-0 2>&1 | tee -a ${LOGFILE}
 137    fi
 138    ${TAPE_STATUS} | tee -a ${LOGFILE}
 139 else
 140    echo No miscellaneous files specified | tee -a ${LOGFILE}
 141    false
 142 fi
 143
 144 mt -f ${TAPE_FILE} rewind
 145 mt -f ${TAPE_FILE} offl
 146
 147 echo Sending the dump log to ${ADMINISTRATOR}
 148 cat ${LOGFILE} | sed -f logfile.sed > ${LOGFILE}.tmp
 149 /usr/ucb/mail -s "Results of backup on `date`" ${ADMINISTRATOR} < ${LOGFILE}.tmp
 150 rm -f ${LOGFILE}.tmp
 151