Listing 1 fssnap.sh

#!/usr/bin/bash

HOST=`uname -n`
BACKINGSTORE=/share/backingstore/$HOST
FSSNAP=/usr/lib/fs/ufs/fssnap

snap_mount()
{
  SLASH=/
  MOUNTPT=/snap/${FS//$SLASH/_}
  [ -d $BACKINGSTORE ]  || mkdir $BACKINGSTORE
  SNAPDEV=`$FSSNAP -o bs=$BACKINGSTORE,unlink $FS`
  [ -d $MOUNTPT ]  || mkdir $MOUNTPT
  mount -o ro $SNAPDEV $MOUNTPT
}

if [ "X$1" = "X-d" ] ; then
  #Delete snapshots
  for SNAPDEV in `$FSSNAP  -i -o blockdevname` ; do
    umount $SNAPDEV
    $FSSNAP -d $SNAPDEV
  done
else
  #Create snapshots
  for FS in `df -F ufs | awk '{print $1}'` ; do
    case $FS in 
       #exclude filesystems we never backup
      /dumps|/export/backingstore|/export/swap) ;; 
      #Stop xntpd while snapshotting / and /var
      /|/var) /etc/init.d/xntpd stop; snap_mount; /etc/init.d/xntpd start;;
      *) snap_mount ;;
    esac
  done
fi