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Add option --utc to use UTC dates in snapshot names instead of the local time zone. #27

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Add option --utc to use UTC dates in snapshot names instead of the local time zone. #27

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0dbeebc
Add option --utc to use UTC dates in snapshot names instead of the local
fungus Apr 29, 2014
bd68148
Snapshot name collision handling.
fungus Apr 30, 2014
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14 changes: 12 additions & 2 deletions src/zfs-auto-snapshot.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ opt_sep='_'
opt_setauto=''
opt_syslog=''
opt_skip_scrub=''
opt_utc=''
opt_verbose=''

# Global summary statistics.
Expand All @@ -62,6 +63,7 @@ print_usage ()
-k, --keep=NUM Keep NUM recent snapshots and destroy older snapshots.
-l, --label=LAB LAB is usually 'hourly', 'daily', or 'monthly'.
-p, --prefix=PRE PRE is 'zfs-auto-snap' by default.
--utc Use UTC times in snapshot names.
-q, --quiet Suppress warnings and notices at the console.
--send-full=F Send zfs full backup. Unimplemented.
--send-incr=F Send zfs incremental backup. Unimplemented.
Expand Down Expand Up @@ -156,6 +158,10 @@ do_snapshots () # properties, flags, snapname, oldglob, [targets...]

for ii in $TARGETS
do
if echo $SNAPSHOTS_OLD | grep -q "$ii@$NAME"
then
do_run "zfs destroy $FLAGS '$ii@$NAME'"
fi
if do_run "zfs snapshot $PROPS $FLAGS '$ii@$NAME'"
then
SNAPSHOT_COUNT=$(( $SNAPSHOT_COUNT + 1 ))
Expand Down Expand Up @@ -196,7 +202,7 @@ do_snapshots () # properties, flags, snapname, oldglob, [targets...]

GETOPT=$(getopt \
--longoptions=default-exclude,dry-run,fast,skip-scrub,recursive \
--longoptions=event:,keep:,label:,prefix:,sep: \
--longoptions=event:,keep:,label:,prefix:,sep:,utc \
--longoptions=debug,help,quiet,syslog,verbose \
--options=dnshe:l:k:p:rs:qgv \
-- "$@" ) \
Expand Down Expand Up @@ -272,6 +278,10 @@ do
opt_prefix="$2"
shift 2
;;
(--utc)
opt_utc='--utc'
shift 1
;;
(-q|--quiet)
opt_debug=''
opt_quiet='1'
Expand Down Expand Up @@ -504,7 +514,7 @@ SNAPPROP="-o com.sun:auto-snapshot-desc='$opt_event'"

# ISO style date; fifteen characters: YYYY-MM-DD-HHMM
# On Solaris %H%M expands to 12h34.
DATE=$(date --utc +%F-%H%M)
DATE=$(date $opt_utc +%F-%H%M)

# The snapshot name after the @ symbol.
SNAPNAME="$opt_prefix${opt_label:+$opt_sep$opt_label}-$DATE"
Expand Down