Address code review feedback: fix C/C++ typo, remove unused constant, add cleanup traps

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

README.md

@@ -4,7 +4,7 @@ A minimal Linux distribution designed for simplicity and portability. SparkOS fe
 
 - **Minimal footprint**: Barebones Linux system with bash shell
 - **Portable**: dd-able disk image for USB flash drives
-- **Custom init**: Lightweight C++ init system
+- **Custom init**: Lightweight C init system
 - **Future-ready**: Designed to support Qt6/QML GUI and Wayland
 - **Root elevation**: Uses sudo for privilege management
 

scripts/create_image.sh

@@ -10,6 +10,37 @@ IMAGE_FILE="$PROJECT_ROOT/sparkos.img"
 IMAGE_SIZE="512M"
 MOUNT_POINT="/tmp/sparkos_mount"
 ROOTFS_DIR="$PROJECT_ROOT/rootfs"
+LOOP_DEV=""
+
+# Cleanup function
+cleanup() {
+    local exit_code=$?
+    echo "Cleaning up..."
+    
+    # Unmount if mounted
+    if mountpoint -q "$MOUNT_POINT" 2>/dev/null; then
+        umount "$MOUNT_POINT" 2>/dev/null || true
+    fi
+    
+    # Remove mount point
+    if [ -d "$MOUNT_POINT" ]; then
+        rmdir "$MOUNT_POINT" 2>/dev/null || true
+    fi
+    
+    # Detach loop device
+    if [ -n "$LOOP_DEV" ] && losetup "$LOOP_DEV" &>/dev/null; then
+        losetup -d "$LOOP_DEV" 2>/dev/null || true
+    fi
+    
+    if [ $exit_code -ne 0 ]; then
+        echo "ERROR: Image creation failed"
+    fi
+    
+    exit $exit_code
+}
+
+# Set trap for cleanup on exit, interrupt, or error
+trap cleanup EXIT INT TERM
 
 echo "SparkOS Image Builder"
 echo "====================="
@@ -91,11 +122,6 @@ dd if=/usr/lib/syslinux/mbr/mbr.bin of="$LOOP_DEV" bs=440 count=1 conv=notrunc 2
     dd if=/usr/share/syslinux/mbr.bin of="$LOOP_DEV" bs=440 count=1 conv=notrunc 2>/dev/null || \
     echo "WARNING: Could not install MBR, you may need to do this manually"
 
-echo "Cleaning up..."
-umount "$MOUNT_POINT"
-rmdir "$MOUNT_POINT"
-losetup -d "$LOOP_DEV"
-
 echo ""
 echo "SUCCESS! Bootable image created: $IMAGE_FILE"
 echo ""

src/init.c

@@ -12,8 +12,6 @@
 #include <errno.h>
 #include <string.h>
 
-#define INIT_PATH "/sbin/init"
-
 static void signal_handler(int sig) {
     if (sig == SIGCHLD) {
         // Reap zombie processes