+# Check that the target filesystem is mounted (actually check that it's not
+# the root filesystem)
+if [ ! -d "$storagedir/$computer" ]; then
+ diemsg "Target filesystem ($storagedir/$computer) does not exist. Aborting"
+fi
+rootfilesystem=`df -P /`
+targetfilesystem=`df -P "$storagedir/$computer"`
+if [ "$rootfilesystem" == "$targetfilesystem" ]; then
+ diemsg "Target filesystem ($storagedir/$computer) was mounted on /. Aborting"
+fi
+
+echo `date`" $computer: Backing up $computer" >&2
+
+# Try to SSH to the computer without entering a password.
+if ! `ssh -n -o NumberOfPasswordPrompts=0 root@$computer /bin/true`; then
+ diemsg "Could not use passwordless SSH."
+fi
+
+# Check if pigz is available
+if ssh -n root@$computer "pigz -V 2>/dev/null"; then
+ compressor=pigz
+else
+ echo `date`" $computer: pigz missing; falling back to gzip."
+ compressor=gzip
+fi
+
+# Check dump bit in fstab
+filesystems=`ssh -n root@$computer "cat /etc/fstab" \
+ | grep -v nfs \
+ | grep -v "^#" \
+ | grep -v "^$" \
+ | awk '{ if ( $(NF-1) != "0" ) print $2}' `
+
+# Clean up our dir at this client
+if ! ssh root@$computer "rm -r /root/.backup ; mkdir -m 700 /root/.backup"; then
+ diemsg "Could not create backup staging area at $computer:/root/.backup"
+fi
+
+# Try to copy $exclude to $computer
+if ! scp $exclude root@$computer:/root/.backup/exclude > /dev/null; then
+ diemsg "Could not copy exclude.txt to $computer"
+fi
+
+# Try to copy preeexec and postexec if they exist
+if [ -f $confdir/preexec.$computer ]; then
+ if ! scp $confdir/preexec.$computer root@$computer:/root/.backup/preexec >&2; then
+ diemsg "Could not copy preexec.$computer to $computer:/root/.backup/preexec"
+ fi
+fi
+if [ -f $confdir/postexec.$computer ]; then
+ if ! scp $confdir/postexec.$computer root@$computer:/root/.backup/postexec >&2; then
+ diemsg "Could not copy postexec.$computer to $computer:/root/.backup/postexec"
+ fi
+fi
+
+# Try to run preexec if it exists
+if ! ssh root@$computer "[ ! -f /root/.backup/preexec ] || /bin/bash -x /root/.backup/preexec" >&2; then
+ diemsg "Could not run $computer:/root/.backup/preexec"
+fi
+
+for filesystem in $filesystems; do
+ # Remove / and $ (for Windows) for path names
+ sfilesystem=`echo $filesystem | tr '\/\$' '__'`
+
+ # Prepare storage area
+ mkdir -m 755 -p $storagedir/$computer/$sfilesystem/full 2>/dev/null
+ mkdir -m 755 -p $storagedir/$computer/$sfilesystem/daglig 2>/dev/null
+
+ # Default backuplevel
+ backuplevel=daglig
+
+ if [ ! -s $storagedir/$computer/$sfilesystem/.date ]
+ then
+ # Take the first full backup of this filesystem on this computer
+ backuplevel=full
+ echo $DATEs > $storagedir/$computer/$sfilesystem/.date
+ fi
+
+ # Check if we want a full backup
+ if [ -f $confdir/fastfullbackupdag.$computer.$sfilesystem ]; then
+ fullbackup_min_for_this_machine=$daysbetweenfullforfixed
+ if [ "$DAY_OF_MONTH" = "`cat $confdir/fastfullbackupdag.$computer.$sfilesystem`" ]; then
+ backuplevel=full
+ fi
+ elif [ -f $confdir/fastfullbackupdag.$computer ]; then
+ fullbackup_min_for_this_machine=$daysbetweenfullforfixed
+ if [ "$DAY_OF_MONTH" = "`cat $confdir/fastfullbackupdag.$computer`" ]; then
+ backuplevel=full
+ fi
+ else
+ fullbackup_min_for_this_machine=$daysbetweenfull
+ fi
+
+ if [ -z "`find $storagedir/$computer/$sfilesystem/full/ -name \*tgz -mtime -$fullbackup_min_for_this_machine`" ]; then
+ backuplevel=full
+ fi
+
+ # We want to be here
+ cd $storagedir/$computer/$sfilesystem/$backuplevel || diemsg "$storagedir/$computer/$sfilesystem/$backuplevel does not exist"
+
+ # Perform the actual backup
+ backup
+
+ # Check if this box has a custom number of full backups
+ if [ -f $confdir/maksfulle.$computer.$sfilesystem ]; then
+ mf=$((`cat $confdir/maksfulle.$computer`+1))
+ elif [ -f $confdir/maksfulle.$computer ] ; then
+ mf=$((`cat $confdir/maksfulle.$computer`+1))
+ else
+ mf=$(($maxnumfull+1))
+ fi
+
+ # Delete old full backups
+ for full in `ls -1t $storagedir/$computer/$sfilesystem/full/*tgz | tail -n +$mf`; do
+ prefix=`echo $full | sed "s/\.[^.]*$//"`
+ echo `date`": $computer:$filesystem Deleting full backup $prefix" >&2
+ rm $prefix*
+ done
+
+ # Delete incremental backups older than the oldest full backup
+ oldf=`ls -t1 $storagedir/$computer/$sfilesystem/full/*tgz | tail -1`
+ find \
+ $storagedir/$computer/$sfilesystem/daglig \
+ -type f \
+ \! -newer $oldf \
+ -printf "`date`: $computer: Deleting old incremental backup: %p\n" \
+ -exec rm {} \; >&2