dd-notify.sh

#!/bin/bash
# ----------------------------------------------------
# SNIPER ELITE: HARDENED LOOP (State Aware)
# ----------------------------------------------------

# TARGET CONFIGURATION
TARGET_VID="0634"
TARGET_PID="5603"

# RECOVERY FILES
IMG_FILE="/mnt/recovery_drive/sniper.img"
MAP_FILE="/mnt/recovery_drive/sniper.map"

# 1. GLOBAL SETTINGS
echo -1 | sudo tee /sys/module/usbcore/parameters/autosuspend >/dev/null

echo "----------------------------------------------------"
echo "[*] PASSIVE LISTENER ACTIVE (HARDENED)"
echo "[*] Waiting for Kasa Plug to cycle power..."
echo "----------------------------------------------------"

# 2. PERSISTENT MONITORING
inotifywait -m -e create --format '%f' /dev | while read NEW_DRIVE; do
    
    # Filter for sd* devices (sdc, sdd, sde...)
    if [[ "$NEW_DRIVE" =~ ^sd[c-z]$ ]]; then
        
        echo "[?] Event detected: $NEW_DRIVE. Verifying stability..."

        # SAFETY 1: THE SETTLE PAUSE
        # Give the kernel/udev 3 seconds to fully register the device attributes.
        # This prevents "race conditions" where we check the ID too fast.
        sleep 3

        # SAFETY 2: THE STALE CHECK
        # If this event was buffered while we were busy, the drive might already be gone.
        # If the file /dev/sdX doesn't exist, skip it immediately.
        if [ ! -b "/dev/$NEW_DRIVE" ]; then
            echo "[!] Skipping Stale/Ghost Event: /dev/$NEW_DRIVE is effectively gone."
            continue
        fi

        # Verify it is the Crucial Drive
        IS_TARGET=$(udevadm info -a -n /dev/$NEW_DRIVE 2>/dev/null | grep "$TARGET_VID")
        
        if [ ! -z "$IS_TARGET" ]; then
            echo "------------------------------------------------"
            echo "[!] HARDWARE EVENT: Drive $NEW_DRIVE Confirmed & Stable"
            
            # A. APPLY PERFORMANCE PATCHES
            echo 180 | sudo tee /sys/block/$NEW_DRIVE/device/timeout >/dev/null 2>&1
            echo 256 | sudo tee /sys/block/$NEW_DRIVE/queue/max_sectors_kb >/dev/null 2>&1
            
            # Force Power On
            find /sys/block/$NEW_DRIVE/device/../../ -name "control" | grep "power/control" | while read config; do
                echo "on" | sudo tee $config >/dev/null 2>&1
            done
            
            # B. RUN RESCUE
            # Using standard Forward mode with the mapfile (No Input Position needed)
            echo "[!] Starting Recovery Run..."
            
            sudo timeout -s INT 100s ddrescue -n -d -r 0 -c 64 /dev/$NEW_DRIVE "$IMG_FILE" "$MAP_FILE"
            
            EXIT_STATUS=$?
            
            if [ $EXIT_STATUS -eq 0 ]; then
                echo "------------------------------------------------"
                echo "🎉 VICTORY: Recovery Complete! (Exit Code 0)"
                echo "------------------------------------------------"
                exit 0
            fi

            echo "[!] Run finished. Mapfile updated."
            echo "[*] Loop active. Waiting for next hardware event..."
        else
            echo "[X] Ignored: $NEW_DRIVE is not the target (Vendor Mismatch)."
        fi
    fi
done