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 # Make sure the log file did not already exist.  Create it.
  49
  50 if [ -f $LOGFILE ] ; then
  51    echo Log file $LOGFILE already exists.
  52    exit 1
  53 else
  54    touch $LOGFILE
  55 fi
  56
  57 mt -f $TAPE_FILE rewind
  58 rm $VOLNO_FILE
  59
  60 set $BACKUP_DIRS
  61 while [ $# -ne 0 ] ; do
  62    host=`echo $1 | sed 's/:.*$//'`
  63    fs=`echo $1 | sed 's/^.*://'`
  64    date=`date`
  65    fsname=`echo $1 | sed 's/\//:/g'`
  66
  67 # This filename must be absolute; it is opened on the machine that runs tar.
  68    TAR_PART2="--listed=/etc/tar-backup/temp.level-1"
  69    TAR_PART3="--label='level 1 backup of $fs on $host at $date' -C $fs ."
  70
  71    echo Backing up $1 at $date | tee -a $LOGFILE
  72    echo Last full dump on this filesystem: | tee -a $LOGFILE
  73
  74    if [ $HOST != $host ] ; then
  75      rsh $host "ls -l /etc/tar-backup/$fsname.level-0; \
  76         cp /etc/tar-backup/$fsname.level-0 /etc/tar-backup/temp.level-1" \
  77         2>&1 | tee -a $LOGFILE
  78    else
  79      ls -l /etc/tar-backup/$fsname.level-0 2>&1 | tee -a $LOGFILE
  80      cp /etc/tar-backup/$fsname.level-0 /etc/tar-backup/temp.level-1 2>&1 | tee -a $LOGFILE
  81    fi
  82
  83    # Actually back things up.
  84
  85    if [ $HOST != $host ] ; then
  86       rsh $host $TAR_PART1 -f $HOST:$TAPE_FILE $TAR_PART2 $TAR_PART3 2>&1 | tee -a $LOGFILE
  87    else
  88 # Using `sh -c exec' causes nested quoting and shell substitution
  89 # to be handled here in the same way rsh handles it.
  90       sh -c "exec $TAR_PART1 -f $TAPE_FILE $TAR_PART2 $TAR_PART3" 2>&1 | tee -a $LOGFILE
  91    fi
  92    if [ $? -ne 0 ] ; then
  93       echo Backup of $1 failed. | tee -a $LOGFILE
  94       # I'm assuming that the tar will have written an empty
  95       # file to the tape, otherwise I should do a cat here.
  96    else
  97       if [ $HOST != $host ] ; then
  98         rsh $host mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/$fsname.level-1 2>&1 | tee -a $LOGFILE
  99       else
 100         mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/$fsname.level-1 2>&1 | tee -a $LOGFILE
 101       fi
 102    fi
 103    $TAPE_STATUS  | tee -a $LOGFILE
 104    sleep 60
 105    shift
 106 done
 107
 108 # Dump any individual files requested.
 109
 110 if [ x != "x$BACKUP_FILES" ] ; then
 111    date=`date`
 112    TAR_PART2="--listed=/etc/tar-backup/temp.level-1"
 113    TAR_PART3="--label='Incremental backup of miscellaneous files at $date'"
 114
 115    echo Backing up miscellaneous files at $date | tee -a $LOGFILE
 116    echo Last full dump of these files: | tee -a $LOGFILE
 117    ls -l /etc/tar-backup/misc.level-0 2>&1 | tee -a $LOGFILE
 118
 119    rm -f /etc/tar-backup/temp.level-1 2>&1 | tee -a $LOGFILE
 120    cp /etc/tar-backup/misc.level-0 /etc/tar-backup/temp.level-1 2>&1 | tee -a $LOGFILE
 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    if [ $? -ne 0 ] ; then
 128      echo Backup of miscellaneous files failed. | tee -a $LOGFILE
 129      # I'm assuming that the tar will have written an empty
 130      # file to the tape, otherwise I should do a cat here.
 131    else
 132      mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/misc.level-1 2>&1 | tee -a $LOGFILE
 133    fi
 134    $TAPE_STATUS | tee -a $LOGFILE
 135 else
 136    echo No miscellaneous files specified | tee -a $LOGFILE
 137    false
 138 fi
 139
 140 mt -f $TAPE_FILE rewind
 141 mt -f $TAPE_FILE offl
 142
 143 echo Sending the dump log to $ADMINISTRATOR
 144 cat $LOGFILE | sed -f logfile.sed > $LOGFILE.tmp
 145 /usr/ucb/mail -s "Results of backup on `date`" $ADMINISTRATOR < $LOGFILE.tmp
 146 rm -f $LOGFILE.tmp
 147