ix init script duplication and CPIO creation issues

- Remove duplicate /sbin/init copying from initramfs_setup_zinit()
- Only /init should be config/init (initramfs setup script)
- No /sbin/init needed - config/init calls 'switch_root /mnt/root /sbin/zinit init'
- Remove unsupported cpio --owner option that broke CPIO creation
- Fix validation to not expect /sbin/init file
- Correct boot flow: /init → switch_root → /sbin/zinit init
- Remove strip and UPX compression from zinit binary copying
- UPX compression was corrupting the zinit binary causing segfaults after switch_root
- Keep zinit unmodified as it's

scripts/lib/initramfs.sh

@@ -27,18 +27,9 @@ function initramfs_setup_zinit() {
         return 1
     fi
     
-    # Copy config/init as /sbin/init (not a symlink to zinit)
-    log_info "Installing config/init as /sbin/init"
-    safe_execute rm -f "${initramfs_dir}/sbin/init"
-    local config_init="${PROJECT_ROOT}/config/init"
-    if [[ -f "$config_init" ]]; then
-        safe_execute cp "$config_init" "${initramfs_dir}/sbin/init"
-        safe_execute chmod 755 "${initramfs_dir}/sbin/init"
-        log_info "✓ Installed config/init as /sbin/init"
-    else
-        log_error "config/init not found: $config_init"
-        return 1
-    fi
+    # Note: /sbin/init is not needed - config/init calls "switch_root /mnt/root /sbin/zinit init"
+    # So after switch_root, /sbin/zinit is the init system (not /sbin/init)
+    log_info "zinit will be called directly via '/sbin/zinit init' after switch_root"
     
     # Copy zinit configuration (all YAML and scripts)
     log_info "Installing zinit configuration"
@@ -117,29 +108,16 @@ function initramfs_copy_components() {
     local copied_count=0
     local missing_count=0
     
-    # Copy zinit to /sbin
+    # Copy zinit to /sbin (NO stripping/UPX - critical init system)
     local zinit_binary="${components_dir}/zinit/target/x86_64-unknown-linux-musl/release/zinit"
     if [[ -f "$zinit_binary" ]]; then
         safe_mkdir "${initramfs_dir}/sbin"
         safe_execute cp "$zinit_binary" "${initramfs_dir}/sbin/zinit"
         safe_execute chmod +x "${initramfs_dir}/sbin/zinit"
         
-        # Strip and UPX compress zinit
-        local original_size=$(get_file_size "${initramfs_dir}/sbin/zinit")
-        if strip "${initramfs_dir}/sbin/zinit" 2>/dev/null || true; then
-            log_debug "Stripped zinit"
-        else
-            log_debug "zinit already stripped or strip failed"
-        fi
-        
-        if command_exists "upx" && upx --best --force "${initramfs_dir}/sbin/zinit" >/dev/null 2>&1 || true; then
-            log_debug "UPX compressed zinit"
-        else
-            log_debug "UPX failed or already compressed"
-        fi
-        
-        local final_size=$(get_file_size "${initramfs_dir}/sbin/zinit")
-        log_info "✓ Copied zinit ${original_size} → ${final_size} to /sbin/zinit"
+        # Keep zinit unmodified to prevent segfaults after switch_root
+        local size=$(get_file_size "${initramfs_dir}/sbin/zinit")
+        log_info "✓ Copied zinit (${size}) to /sbin/zinit (no optimization - critical binary)"
         ((copied_count++))
     else
         log_error "✗ zinit binary not found: ${zinit_binary}"
@@ -669,7 +647,6 @@ function initramfs_validate() {
     # Check essential files and directories
     local essential_items=(
         "init"
-        "sbin/init"
         "sbin/zinit"
         "bin/busybox"
         "etc/zinit"
@@ -699,12 +676,11 @@ function initramfs_validate() {
         ((errors++))
     fi
     
-    # Check that /sbin/init is a script
-    if [[ -f "${initramfs_dir}/sbin/init" && -x "${initramfs_dir}/sbin/init" ]]; then
-        log_info "✓ /sbin/init script found"
+    # Check that /sbin/init does NOT exist (zinit called directly)
+    if [[ -e "${initramfs_dir}/sbin/init" ]]; then
+        log_warn "⚠ /sbin/init exists but should not (zinit called directly)"
     else
-        log_error "✗ /sbin/init is missing or not executable"
-        ((errors++))
+        log_info "✓ /sbin/init correctly absent (zinit called directly)"
     fi
     
     # Check zinit configuration