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Update zfs-auto-snapshot.sh #125

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Update zfs-auto-snapshot.sh #125

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24 changes: 22 additions & 2 deletions src/zfs-auto-snapshot.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,7 @@ opt_pre_snapshot=''
opt_post_snapshot=''
opt_do_snapshots=1
opt_min_size=0
opt_changed=0

# Global summary statistics.
DESTRUCTION_COUNT='0'
Expand All @@ -57,6 +58,7 @@ print_usage ()
{
echo "Usage: $0 [options] [-l label] <'//' | name [name...]>
--default-exclude Exclude datasets if com.sun:auto-snapshot is unset.
-c, --changed Snap only if data written > 0.
-d, --debug Print debugging messages.
-e, --event=EVENT Set the com.sun:auto-snapshot-desc property to EVENT.
--fast Use a faster zfs list invocation.
Expand Down Expand Up @@ -164,9 +166,9 @@ do_snapshots () # properties, flags, snapname, oldglob, [targets...]
do
# Check if size check is > 0
size_check_skip=0
bytes_written=`zfs get -Hp -o value written $ii`
if [ "$opt_min_size" -gt 0 ]
then
bytes_written=`zfs get -Hp -o value written $ii`
kb_written=$(( $bytes_written / 1024 ))
if [ "$kb_written" -lt "$opt_min_size" ]
then
Expand All @@ -176,7 +178,20 @@ do_snapshots () # properties, flags, snapname, oldglob, [targets...]
echo "Skipping target $ii, only $kb_written kB written since last snap. opt_min_size is $opt_min_size"
fi
fi
fi
fi

# Force check if data changed
if [ "$opt_changed" -eq 1 ]
then
if [ "$bytes_written" -eq 0 ]
then
size_check_skip=1
if [ $opt_verbose -gt 0 ]
then
echo "Skipping target $ii, 0 bytes written since last snap."
fi
fi
fi

if [ -n "$opt_do_snapshots" -a "$size_check_skip" -eq 0 ]
then
Expand Down Expand Up @@ -245,6 +260,10 @@ eval set -- "$GETOPT"
while [ "$#" -gt '0' ]
do
case "$1" in
(-c|--changed)
opt_changed=1
shift 1
;;
(-d|--debug)
opt_debug='1'
opt_quiet=''
Expand Down Expand Up @@ -629,3 +648,4 @@ print_log notice "@$SNAPNAME," \

exit 0
# }