tools: add ipcam_cleanup.sh script

tools/ipcam_cleanup.sh

@@ -0,0 +1,102 @@
+#!/bin/bash
+
+# Function to display usage
+usage() {
+    echo "Usage: $0 --dir <dir1> [<dir2> ...] [--min-free-space <space_in_GiB>] [--debug]" 1>&2
+}
+
+# Function to output error messages and exit
+error_msg() {
+    echo "Error: $1" 1>&2
+    exit 1
+}
+
+# Function to output debug messages
+debug_msg() {
+    if $DEBUG_MODE; then
+        echo "$1"
+    fi
+}
+
+# Initialize variables
+declare -a DIRS
+MIN_FREE_SPACE=200 # Default minimum free space in GiB
+DEBUG_MODE=false
+PARSE_DIRS=false
+
+# Parse command-line arguments
+for arg in "$@"; do
+  if $PARSE_DIRS; then
+    if [[ "$arg" =~ ^-- ]]; then
+      PARSE_DIRS=false
+    else
+      DIRS+=("$arg")
+      continue
+    fi
+  fi
+
+  case $arg in
+    --dir)
+      PARSE_DIRS=true
+      ;;
+    --min-free-space)
+      MIN_FREE_SPACE="$2"
+      shift # Remove argument value
+      ;;
+    --debug)
+      DEBUG_MODE=true
+      ;;
+    *)
+      if [ "$arg" != "${DIRS[-1]}" ]; then
+        usage
+        error_msg "Unknown parameter passed: $arg"
+      fi
+      ;;
+  esac
+done
+
+# Check if at least one directory is provided and if it is indeed a directory
+if [ ${#DIRS[@]} -eq 0 ]; then
+    usage
+    error_msg "No directories specified."
+fi
+
+for DIR in "${DIRS[@]}"; do
+  if [ ! -d "$DIR" ]; then
+    error_msg "'$DIR' is not a directory."
+  fi
+done
+
+# Check if all directories are on the same disk
+PREV_DISK=""
+for DIR in "${DIRS[@]}"; do
+  CURRENT_DISK=$(df "$DIR" | tail -n 1 | awk '{print $1}')
+  if [ -n "$PREV_DISK" ] && [ "$PREV_DISK" != "$CURRENT_DISK" ]; then
+    usage
+    error_msg "Directories are not on the same disk."
+  fi
+  PREV_DISK=$CURRENT_DISK
+done
+
+# Convert GiB to KiB (as df outputs in KiB)
+MIN_FREE_SPACE_KiB=$((MIN_FREE_SPACE * 1024 * 1024))
+
+# Get the free space on the disk where the directories are located
+FREE_SPACE_KiB=$(df "${DIRS[0]}" | tail -n 1 | awk '{print $4}')
+
+# Find files (not directories) in all specified directories, sort them by modification time (oldest first)
+if [ $FREE_SPACE_KiB -lt $MIN_FREE_SPACE_KiB ]; then
+    debug_msg "Less than $MIN_FREE_SPACE GiB free, cleaning up..."
+    find "${DIRS[@]}" -type f -printf '%T+ %p\n' | sort | while IFS= read -r line; do
+        if [ $(df "${DIRS[0]}" | tail -n 1 | awk '{print $4}') -ge $MIN_FREE_SPACE_KiB ]; then
+            break
+        fi
+        FILE=$(echo "$line" | cut -d ' ' -f2-)
+        debug_msg "Deleting $FILE"
+        rm -f -- "$FILE"
+        REMAINING_SPACE_KiB=$(df "${DIRS[0]}" | tail -n 1 | awk '{print $4}')
+        debug_msg "Remaining space: $((REMAINING_SPACE_KiB / 1024 / 1024)) GiB"
+    done
+else
+    debug_msg "Enough free space available."
+fi