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06_logs.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+LOG_FILE="$SCRIPT_DIR/raspi-backup.log"
+
+usage() {
+  echo "Usage:"
+  echo "  ./06_logs.sh            # letzte 200 Zeilen"
+  echo "  ./06_logs.sh -f         # live folgen (tail -f)"
+  echo "  ./06_logs.sh -n 500     # letzte N Zeilen"
+  echo "  ./06_logs.sh --all      # komplettes Log (less, falls vorhanden)"
+}
+
+if [[ ! -f "$LOG_FILE" ]]; then
+  echo "Kein Log gefunden: $LOG_FILE"
+  exit 0
+fi
+
+mode="tail"
+lines=200
+
+case "${1:-}" in
+  "" ) ;;
+  -f|--follow) mode="follow" ;;
+  -n|--lines)
+    [[ -n "${2:-}" ]] || { usage; exit 2; }
+    lines="$2"
+    ;;
+  --all) mode="all" ;;
+  -h|--help) usage; exit 0 ;;
+  *) usage; exit 2 ;;
+esac
+
+case "$mode" in
+  follow)
+    echo "Folge Log live: $LOG_FILE"
+    tail -f "$LOG_FILE"
+    ;;
+  all)
+    if command -v less >/dev/null 2>&1; then
+      less "$LOG_FILE"
+    else
+      cat "$LOG_FILE"
+    fi
+    ;;
+  tail)
+    tail -n "$lines" "$LOG_FILE"
+    ;;
+esac