Improve setup_usb.sh with automatic fstab updates

- Added automatic /etc/fstab modification option
  - Creates timestamped backup before modifying
  - Checks if UUID entries already exist
  - Appends new entries only if not present
  - Provides clear feedback for each step

- Enhanced user prompts with better guidance
- Added test instructions after fstab update

Previously the script only displayed the fstab entries
for manual addition. Now it can automatically add them
with a single confirmation.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

setup_usb.sh

@@ -104,31 +104,72 @@ ls -la /media/usb0 /media/usb1 2>/dev/null | grep -E "^d|^total" || echo "No mou
 echo ""
 
 # Offer to add to fstab
-read -p "Add these mounts to /etc/fstab for automatic mounting? (y/n) " -n 1 -r
-echo ""
+FSTAB_ENTRIES=""
 
-if [[ $REPLY =~ ^[Yy]$ ]]; then
+if [ ! -z "$USB0_DEVICE" ]; then
+    UUID0=$(blkid -s UUID -o value "$USB0_DEVICE")
+    if [ ! -z "$UUID0" ]; then
+        FSTAB_ENTRIES+="UUID=$UUID0  /media/usb0  vfat  defaults,nofail,uid=$REAL_UID,gid=$REAL_GID  0  0"$'\n'
+    fi
+fi
+
+if [ ! -z "$USB1_DEVICE" ]; then
+    UUID1=$(blkid -s UUID -o value "$USB1_DEVICE")
+    if [ ! -z "$UUID1" ]; then
+        FSTAB_ENTRIES+="UUID=$UUID1  /media/usb1  vfat  defaults,nofail,uid=$REAL_UID,gid=$REAL_GID  0  0"$'\n'
+    fi
+fi
+
+if [ ! -z "$FSTAB_ENTRIES" ]; then
     echo ""
-    echo "Add the following lines to /etc/fstab:"
+    echo "Suggested /etc/fstab entries:"
+    echo ""
+    echo "$FSTAB_ENTRIES"
+
+    read -p "Automatically add these to /etc/fstab? (y/n) " -n 1 -r
     echo ""
 
-    if [ ! -z "$USB0_DEVICE" ]; then
-        UUID0=$(blkid -s UUID -o value "$USB0_DEVICE")
+    if [[ $REPLY =~ ^[Yy]$ ]]; then
+        # Backup fstab
+        cp /etc/fstab /etc/fstab.backup.$(date +%Y%m%d_%H%M%S)
+        echo -e "${GREEN}✓ Backed up /etc/fstab${NC}"
+
+        # Check if entries already exist
+        ADDED=0
         if [ ! -z "$UUID0" ]; then
-            echo "UUID=$UUID0  /media/usb0  vfat  defaults,nofail,uid=$REAL_UID,gid=$REAL_GID  0  0"
+            if ! grep -q "$UUID0" /etc/fstab; then
+                echo "UUID=$UUID0  /media/usb0  vfat  defaults,nofail,uid=$REAL_UID,gid=$REAL_GID  0  0" >> /etc/fstab
+                echo -e "${GREEN}✓ Added USB0 to /etc/fstab${NC}"
+                ADDED=1
+            else
+                echo -e "${YELLOW}⚠ USB0 already in /etc/fstab${NC}"
+            fi
         fi
-    fi
 
-    if [ ! -z "$USB1_DEVICE" ]; then
-        UUID1=$(blkid -s UUID -o value "$USB1_DEVICE")
         if [ ! -z "$UUID1" ]; then
-            echo "UUID=$UUID1  /media/usb1  vfat  defaults,nofail,uid=$REAL_UID,gid=$REAL_GID  0  0"
+            if ! grep -q "$UUID1" /etc/fstab; then
+                echo "UUID=$UUID1  /media/usb1  vfat  defaults,nofail,uid=$REAL_UID,gid=$REAL_GID  0  0" >> /etc/fstab
+                echo -e "${GREEN}✓ Added USB1 to /etc/fstab${NC}"
+                ADDED=1
+            else
+                echo -e "${YELLOW}⚠ USB1 already in /etc/fstab${NC}"
+            fi
         fi
-    fi
 
-    echo ""
-    echo "To add automatically, run:"
-    echo "  sudo nano /etc/fstab"
+        if [ $ADDED -eq 1 ]; then
+            echo ""
+            echo -e "${GREEN}✓ fstab updated successfully${NC}"
+            echo "Drives will auto-mount on reboot"
+            echo ""
+            echo "To test now, run:"
+            echo "  sudo umount /media/usb0 /media/usb1 2>/dev/null"
+            echo "  sudo mount -a"
+        fi
+    else
+        echo ""
+        echo "To add manually, run:"
+        echo "  sudo nano /etc/fstab"
+    fi
 fi
 
 echo ""