filewatcher.sh

#!/bin/bash
# requires inotify-tools and mailutils and rsync  
#echo "fs.inotify.max_user_watches=524288" | sudo tee -a /etc/sysctl.d/99-sysctl.conf

# Directory to be monitored
MONITOR_DIR="/var/www/html"

# Directory to store file backups
BACKUP_DIR="/var/www/filewatcher_backup/html"
mkdir -p "$BACKUP_DIR"

# Directory to store archived versions of files
ARCHIVE_DIR="/var/www/filewatcher_backup/archived"
mkdir -p "$ARCHIVE_DIR"

# Email settings
EMAIL_SUBJECT="File Changes Detected"
EMAIL_TO="[email protected]"
EMAIL_FROM="[email protected]"

# File to log changes
TMP_FILE="/var/log/file_changes.log" 
>> "$TMP_FILE" # Clear or create the log file at start

# Archive a file version before it's modified or deleted
archive_file() {
    local event_type="$1"
    local file="$2"
    local timestamp=$(date +%Y%m%d%H%M%S)
    local relative_path="${file#$MONITOR_DIR/}"
    local archive_path="$ARCHIVE_DIR/$relative_path"

    # Create archive subdirectories as needed
    mkdir -p "$(dirname "$archive_path")"

    # For delete events, just log the action since the file no longer exists
    if [[ "$event_type" == *"DELETE"* || "$event_type" == *"MOVED_FROM"* ]]; then
        echo "$timestamp: $event_type - $file" >> "$archive_path.$timestamp.log"
    else
        # Copy the file to the archive with a timestamp
        cp "$file" "$archive_path.$timestamp"
        echo "$timestamp: $event_type - $file" >> "$TMP_FILE"
    fi
}

# Synchronize the backup
sync_backup() {
    rsync -a --delete "$MONITOR_DIR/" "$BACKUP_DIR/"
}

# Function to send email and clear log
send_email_if_needed() {
    if [ -s "$TMP_FILE" ]; then
        mail -s "$EMAIL_SUBJECT" -r "$EMAIL_FROM" "$EMAIL_TO" < "$TMP_FILE"
        > "$TMP_FILE" # Clear the file after sending the email
    fi
}

# Initial backup synchronization
sync_backup

# Monitor for modifications, deletions, and moves
inotifywait -m -r -e modify -e delete -e move --format '%e %w%f' "$MONITOR_DIR" | while read event file; do
    archive_file "$event" "$file"
    sync_backup
done &

# Periodically send email updates
while true; do
    sleep 600 # 10 minutes
    send_email_if_needed
done