X-Git-Url: https://git.rrq.au/?a=blobdiff_plain;f=sss.sh;h=35b592530c5a7f48a71b47f32b342e937d15766a;hb=refs%2Fheads%2Fmaster;hp=c514643279ecacde1ba546a4d79bfc9ca1c60e22;hpb=9602af81a13f1706b19ae36eef2cdc8356bbc868;p=rrq%2Fnilfs2sss.git

diff --git a/sss.sh b/sss.sh
index c514643..35b5925 100755
--- a/sss.sh
+++ b/sss.sh
@@ -6,87 +6,74 @@
 # so as to preserve 7 most recent daily, 4 most recent weekly and 12
 # most recent monthly snapshots, in addition to labelled ones.
 #
-# The cron bot is expected to run once an hour
+# The cron bot is expected to run once a minute
 
-# hourly = every hour
-# daily = .. keep one of the hourly yesterday
-# weekly = .. keep one of the daily last week
-# monthly = .. keep one of the daily last month
+# Name of snapshot tag file for "important" snapshots. Format:
+# $CNO .... one line for each $CNO that should be preserved as snapshot
+# chcp ss $CNO && echo $CNO >> $NAMELIST
+NAMELIST=/etc/nilfs2sss.list
 
-DEV=/dev/sda5
+# The hour-of-day to preserve as daily snapshot
 KEEPHH=12
+
+# The day-of-month to preserve as monthly snapshot
 KEEPDD=15
 
+DEV=$1
+[ "$2" = "all" ] || LSCP="-s"
+
+if [ -z "$DEV" ] ; then
+    DEVS=( $( mount | grep nilfs2 | sed 's/ .*//' ) )
+    DEV=${DEVS[0]}
+    if [ -z "$DEV" ] ; then
+	echo "Error* cannot find a mounted nilfs2 partition" >&2
+	exit 1
+    fi
+fi
+
 FIVELY="$(date -d '-5 minutes' '+%Y-%m-%d %H:%M:%S')"
 HOURLY="$(date -d '-1 hour' '+%Y-%m-%d %H:%M:%S')"
-DAILY="$(date -d '-1 days' '+%Y-%m-%d %H:%M:%S')"
-MONTHLY="$(date -d '-1 months' '+%Y-%m-%d %H:%M:%S')"
+DAILY="$(date -d '-1 day' '+%Y-%m-%d %H:%M:%S')"
+MONTHLY="$(date -d '-1 month' '+%Y-%m-%d %H:%M:%S')"
 WEEKLY="$(date -d '-7 days' '+%Y-%m-%d %H:%M:%S')"
-YEARLY="$(date -d '-1 years' '+%Y-%m-%d %H:%M:%S')"
+YEARLY="$(date -d '-1 year' '+%Y-%m-%d %H:%M:%S')"
 
-date "+%Y-%m-%d %H:%M:%S ---- checking" >&2
-lscp -s | while read CNO DATE TIME REST ; do
-    TS="$DATE $TIME"
-    [ "$CNO" = "CNO" ] && continue
-    if [[ ! "$TS" > "$YEARLY" ]] ; then
-	if [ "$KEEPYY" = "${DATE:0:4}" ] ; then
-	    echo "# discard year duplicate $CNO $DATE $TIME" >&2
-	    chcp cp $CNO
+MARK=( )
+function marksnap() {
+    if [[ "${MARK[0]}" == "$1" ]] && [[ "${MARK[1]}" = "$2" ]] ; then
+	if [ -r "$NAMELIST" ] && grep -q ^$3 "$NAMELIST" ; then
+	    : # Don't change important snapshots
 	else
-	    KEEPYY="${DATE:0:4}"
+	    chcp cp $DEV ${MARK[2]}
 	fi
-	echo "# keep first of year $CNO $DATE $TIME" >&2
-	continue
     fi
-    # Within last year
-    if [[ ! "$TS" > "$MONTHLY" ]] ; then
-	if [ "$KEEPMM" = "${DATE:0:7}" ] ; then
-	    echo "# discard month duplicate $CNO $DATE $TIME" >&2
-	    chcp cp $CNO
-	else
-	    KEEPMM="${DATE:0:7}"
-	fi
-    fi
-    # Within last month
-    if [[ ! "$TS" > "$WEEKLY" ]] ; then
-	if [[ "$KEEPDD" = "${DATE:8:2}" ]] ; then
-	    if [ -z "$KEEPWW" ] ; then
-		KEEPWW="${DATE:8:2}"
-		continue
-	    fi
-	    echo "# discard duplicate day $KEEPDD: $CNO $DATE $TIME" >&2
-	else 
-	    echo "# discard not day $KEEPDD: $CNO $DATE $TIME" >&2
-	fi
-	chcp cp $CNO
-	continue
-    fi
-    # Within last week
-    if [[ ! "$TS" > "$DAILY" ]] ; then
-	[[ "$KEEPHH" = "${TIME:0:2}" ]] && continue
-	echo "# discard not hour $KEEPHH: $CNO $DATE $TIME" >&2
-	chcp cp $CNO
-	continue
-    fi
-    # Within last day
-    if [[ ! "$TS" > "$HOURLY" ]] ; then
-	if [ "$KEEP55" = "${TIME:0:2}" ] ; then
-	    echo "# discard duplicate for hour $KEEP55: $CNO $DATE $TIME" >&2
-	    chcp cp $CNO
-	else
-	    KEEP55="${TIME:0:2}"
-	    #echo "# keep first of hour $KEEP55: $CNO $DATE $TIME" >&2
-	fi
-	continue
-    fi
-    # Within last hour
-    #echo "# keep within last hour $CNO $DATE $TIME" >&2
-    [[ ! "$TS" > "$FIVELY" ]] && continue
-    echo "$CNO $DATE $TIME is within last five minutes"
-    #echo "# $CNO is within last five minutes " >&2
-done | if read X ; then
-    :
-elif [[ $(( $(date +%M) % 5 )) = 0 ]] ; then
-    date "+# new snapshot at %Y-%m-%d %H:%M:%S" >&2
-    mkcp -s $DEV
-fi
+    MARK=( "$1" "$2" "$3" )
+}
+
+{ flock 9
+
+  date "+$DEV: %Y-%m-%d %H:%M:%S ---- checking" >&2
+  lscp $LSCP $DEV | while read CNO DATE TIME REST ; do
+      TS="$DATE $TIME"
+      [ "$CNO" = "CNO" ] && continue
+      if [[ ! "$TS" > "$YEARLY" ]] ; then
+	  marksnap YEAR "${DATE:0:4}" $CNO
+      elif [[ ! "$TS" > "$MONTHLY" ]] ; then
+	   marksnap MONTH "${DATE:5:2}" $CNO
+      elif [[ ! "$TS" > "$WEEKLY" ]] ; then
+	   # For older than most recent week, keep last snapshot each week
+	   marksnap WEEK "$(( 7${DATE:8:2} / 7 - 100 ))" $CNO
+      elif [[ ! "$TS" > "$DAILY" ]] ; then
+	   marksnap DAY "${DATE:8:2}" $CNO
+      elif [[ ! "$TS" > "$HOURLY" ]] ; then
+	   marksnap HOUR "${DATE:8:2}-${TIME:0:2}" $CNO
+      else
+	  : # echo "$CNO $DATE $TIME within last hour"
+      fi
+  done | if read X ; then
+      : # snapshot within last hour
+  else
+      date "+$DEV: new snapshot at %Y-%m-%d %H:%M:%S" >&2
+      mkcp -s $DEV
+  fi
+} 9> /var/run/lock/sss.lock