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 if [ ! -w / ]; then
  12    echo The backup must be run as root,
  13    echo 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 "-" $6}'`-level-1
  45 HOST=`hostname | sed 's/\..*//'`
  46 TAR_PART1="/usr/local/bin/tar -c --multi-volume --one-file-system --block=${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 # This filename must be absolute; it is opened on the machine that runs tar.
  73    TAR_PART2="--listed=/etc/tar-backup/temp.level-1"
  74    TAR_PART3="--label='level 1 backup of ${fs} on ${host} at ${date}' -C ${fs} ."
  75
  76    echo Backing up ${1} at ${date} | tee -a ${LOGFILE}
  77    echo Last full dump on this filesystem: | tee -a ${LOGFILE}
  78
  79    if [ ${HOST} != ${host} ] ; then
  80      rsh ${host} "ls -l /etc/tar-backup/${fsname}.level-0; \
  81         cp /etc/tar-backup/${fsname}.level-0 /etc/tar-backup/temp.level-1" \
  82         2>&1 | tee -a ${LOGFILE}
  83    else
  84      ls -l /etc/tar-backup/${fsname}.level-0 2>&1 | tee -a ${LOGFILE}
  85      cp /etc/tar-backup/${fsname}.level-0 /etc/tar-backup/temp.level-1 2>&1 | tee -a ${LOGFILE}
  86    fi
  87
  88    # Actually back things up.
  89
  90    if [ ${HOST} != ${host} ] ; then
  91       rsh ${host} ${TAR_PART1} -f ${HOST}:${TAPE_FILE} ${TAR_PART2} ${TAR_PART3} 2>&1 | tee -a ${LOGFILE}
  92    else
  93 # Using `sh -c exec' causes nested quoting and shell substitution
  94 # to be handled here in the same way rsh handles it.
  95       sh -c "exec ${TAR_PART1} -f ${TAPE_FILE} ${TAR_PART2} ${TAR_PART3}" 2>&1 | tee -a ${LOGFILE}
  96    fi
  97    # This doesn't presently work, of course, because $? is set to the exit
  98    # status of the last thing in the pipeline of the previous command,
  99    # namely `tee'.  We really want the exit status of the sh command
 100    # running tar, but getting this seems to be nontrivial.  --friedman
 101    if [ $? -ne 0 ] ; then
 102       echo Backup of ${1} failed. | tee -a ${LOGFILE}
 103       # I'm assuming that the tar will have written an empty
 104       # file to the tape, otherwise I should do a cat here.
 105    else
 106       if [ ${HOST} != ${host} ] ; then
 107         rsh ${host} mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/${fsname}.level-1 2>&1 | tee -a ${LOGFILE}
 108       else
 109         mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/${fsname}.level-1 2>&1 | tee -a ${LOGFILE}
 110       fi
 111    fi
 112    ${TAPE_STATUS}  | tee -a ${LOGFILE}
 113    sleep 60
 114    shift
 115 done
 116
 117 # Dump any individual files requested.
 118
 119 if [ x != "x${BACKUP_FILES}" ] ; then
 120    date=`date`
 121    TAR_PART2="--listed=/etc/tar-backup/temp.level-1"
 122    TAR_PART3="--label='Incremental backup of miscellaneous files at ${date}'"
 123
 124    echo Backing up miscellaneous files at ${date} | tee -a ${LOGFILE}
 125    echo Last full dump of these files: | tee -a ${LOGFILE}
 126    ls -l /etc/tar-backup/misc.level-0 2>&1 | tee -a ${LOGFILE}
 127
 128    rm -f /etc/tar-backup/temp.level-1 2>&1 | tee -a ${LOGFILE}
 129    cp /etc/tar-backup/misc.level-0 /etc/tar-backup/temp.level-1 2>&1 | tee -a ${LOGFILE}
 130
 131    echo Backing up miscellaneous files at ${date} | tee -a ${LOGFILE}
 132 # Using `sh -c exec' causes nested quoting and shell substitution
 133 # to be handled here in the same way rsh handles it.
 134    sh -c "exec ${TAR_PART1} -f ${TAPE_FILE} ${TAR_PART2} ${TAR_PART3} \
 135     ${BACKUP_FILES}" 2>&1 | tee -a ${LOGFILE}
 136    # This doesn't presently work, of course, because $? is set to the exit
 137    # status of the last thing in the pipeline of the previous command,
 138    # namely `tee'.  We really want the exit status of the sh command
 139    # running tar, but getting this seems to be nontrivial.  --friedman
 140    if [ $? -ne 0 ] ; then
 141      echo Backup of miscellaneous files failed. | tee -a ${LOGFILE}
 142      # I'm assuming that the tar will have written an empty
 143      # file to the tape, otherwise I should do a cat here.
 144    else
 145      mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/misc.level-1 2>&1 | tee -a ${LOGFILE}
 146    fi
 147    ${TAPE_STATUS} | tee -a ${LOGFILE}
 148 else
 149    echo No miscellaneous files specified | tee -a ${LOGFILE}
 150    false
 151 fi
 152
 153 mt -f ${TAPE_FILE} rewind
 154 mt -f ${TAPE_FILE} offl
 155
 156 echo Sending the dump log to ${ADMINISTRATOR}
 157 cat ${LOGFILE} | sed -f logfile.sed > ${LOGFILE}.tmp
 158 /usr/ucb/mail -s "Results of backup on `date`" ${ADMINISTRATOR} < ${LOGFILE}.tmp
 159 rm -f ${LOGFILE}.tmp
 160