README.md

@@ -18,16 +18,17 @@ Script to check zfs snapshot counts and age of oldest most recent snapshot. Spec
 
 ## Options
 
-- `-d, --dataset <dataset>`: Dataset to check (required; can be repeated for multiple)
+```bash
-- `-p, --prefix <prefix>`: Snapshot prefix (default: `zrepl_`)
+-d, --dataset <dataset>         Dataset to check (required, repeat for multiple)
-- `-f, --format <format>`: Timestamp format (see [below](#timestamp-formats--f))
+-e, --exclude <dataset>         Exclude dataset (repeat for multiple)
-- `-s, --max-snapshots <num>`: Max snapshots per dataset
+-p, --prefix <prefix>           Snapshot prefix (default: zrepl_)
-- `-m, --max-age <duration>`: Max age (e.g., 31s, 17m, 24h)
+-f, --format <format>           Timestamp format (see [below](#timestamp-formats--f))
-- `-r, --recursive`: Include sub-datasets
+-s, --max-snapshots <num>       Max snapshots per dataset
-- `-e, --exclude <dataset>`: Exclude dataset (can be repeated for multiple)
+-m, --max-age <duration>        Max age (e.g., 31s, 17m, 24h)
-- `-v, --verbose`: Show detailed table
+-r, --recursive                 Include sub-datasets
-- `-n, --err-for-no-snapshots`: Error if no snapshots found
+-v, --verbose                   Show detailed table
-- `-h, --help`: Show help message
+-n, --err-for-no-snapshots      Error if no snapshots found
+```
 
 ## Timestamp Formats (`-f`)
 

checkSnapshots.sh

@@ -17,7 +17,7 @@ ERR_FOR_NO_SNAPSHOTS=false
 FORMAT=""
 
 usage() {
-    echo "Usage: $0 -d|--dataset <dataset> [-d|--dataset <dataset>...] [-p|--prefix <prefix>] [-f|--format <format>] [-m <duration>] [-s|--max-snapshots <num>] [-e|--exclude <dataset>] [-r|--recursive] [-v|--verbose] [-n|--err-for-no-snapshots] [-h|--help]"
+    echo "Usage: $0 -d|--dataset <dataset> [-d|--dataset <dataset>...] [-p|--prefix <prefix>] [-f|--format <format>] [-m <duration>] [-s|--max-snapshots <num>] [-e|--exclude <dataset>] [-r|--recursive] [-v|--verbose] [-n|--err-for-no-snapshots]"
     echo "  -d, --dataset              ZFS dataset to check (can be specified multiple times)"
     echo "  -e, --exclude              Dataset to exclude (can be specified multiple times)"
     echo "  -p, --prefix               Snapshot prefix (default: zrepl_)"
@@ -27,7 +27,6 @@ usage() {
     echo "  -r, --recursive            Include all sub-datasets of specified datasets"
     echo "  -v, --verbose              Print per-dataset snapshot count and age"
     echo "  -n, --err-for-no-snapshots Return error if any dataset has no snapshots"
-    echo "  -h, --help                 Show this help message"
     exit 1
 }
 
@@ -45,6 +44,20 @@ duration_to_seconds() {
     esac
 }
 
+# timestamp_to_epoch() {
+#     # Format: YYYYMMDD_HHMMSS_mmm
+#     local timestamp="$1"
+#     local year="${timestamp:0:4}"
+#     local month="${timestamp:4:2}"
+#     local day="${timestamp:6:2}"
+#     local hour="${timestamp:9:2}"
+#     local minute="${timestamp:11:2}"
+#     local second="${timestamp:13:2}"
+
+#     # Convert to epoch using date command (assuming UTC)
+#     date -u -d "${year}-${month}-${day} ${hour}:${minute}:${second}" +%s 2>/dev/null
+# }
+
 # Format age in seconds to human-readable format
 format_age() {
     local total_seconds="$1"
@@ -343,7 +356,6 @@ if [[ "$VERBOSE" == "true" ]]; then
     echo ""
 fi
 
-echo "Datasets processed: ${#DATASETS_TO_PROCESS[@]}"
 echo "Max snapshots: $MAX_SNAPSHOT_COUNT ($MAX_SNAPSHOT_DATASET)"
 echo "Oldest most recent snapshot age: $TIME_DIFF_FORMATTED ($OLDEST_SNAPSHOT_DATASET)"