[update] : Use install command instead of cp command

Author: Hayao0819

build.sh

@@ -583,9 +583,9 @@ make_customize_airootfs() {
 
     # Replace /etc/mkinitcpio.conf if Plymouth is enabled.
     if [[ "${boot_splash}" = true ]]; then
-        _cp "${script_path}/mkinitcpio/mkinitcpio-plymouth.conf" "${airootfs_dir}/etc/mkinitcpio.conf"
+        install -m 0644 -- "${script_path}/mkinitcpio/mkinitcpio-plymouth.conf" "${airootfs_dir}/etc/mkinitcpio.conf"
     else
-        _cp "${script_path}/mkinitcpio/mkinitcpio.conf" "${airootfs_dir}/etc/mkinitcpio.conf"
+        install -m 0644 -- "${script_path}/mkinitcpio/mkinitcpio.conf" "${airootfs_dir}/etc/mkinitcpio.conf"
     fi
 
     # customize_airootfs options
@@ -633,7 +633,7 @@ make_customize_airootfs() {
     done
 
     chmod 755 "${airootfs_dir}/${_main_script}"
-    _cp "${airootfs_dir}/${_main_script}" "${build_dir}/$(basename "${_main_script}")"
+    cp "${airootfs_dir}/${_main_script}" "${build_dir}/$(basename "${_main_script}")"
     _chroot_run "${_main_script}" "${_airootfs_script_options[@]}"
     remove "${airootfs_dir}/${_main_script}"
 
@@ -649,15 +649,15 @@ make_setup_mkinitcpio() {
     mkdir -p "${airootfs_dir}/etc/initcpio/hooks" "${airootfs_dir}/etc/initcpio/install"
 
     for _hook in "archiso" "archiso_shutdown" "archiso_pxe_common" "archiso_pxe_nbd" "archiso_pxe_http" "archiso_pxe_nfs" "archiso_loop_mnt"; do
-        _cp "${script_path}/system/initcpio/hooks/${_hook}" "${airootfs_dir}/etc/initcpio/hooks"
-        _cp "${script_path}/system/initcpio/install/${_hook}" "${airootfs_dir}/etc/initcpio/install"
+        install -m 0644 -- "${script_path}/system/initcpio/hooks/${_hook}" "${airootfs_dir}/etc/initcpio/hooks"
+        install -m 0644 -- "${script_path}/system/initcpio/install/${_hook}" "${airootfs_dir}/etc/initcpio/install"
     done
 
     sed -i "s|%COWSPACE%|${cowspace}|g" "${airootfs_dir}/etc/initcpio/hooks/archiso"
     sed -i "s|/usr/lib/initcpio/|/etc/initcpio/|g" "${airootfs_dir}/etc/initcpio/install/archiso_shutdown"
-    _cp "${script_path}/system/initcpio/install/archiso_kms" "${airootfs_dir}/etc/initcpio/install"
-    _cp "${script_path}/system/initcpio/script/archiso_shutdown" "${airootfs_dir}/etc/initcpio"
-    _cp "${script_path}/mkinitcpio/mkinitcpio-archiso.conf" "${airootfs_dir}/etc/mkinitcpio-archiso.conf"
+    install -m 0644 -- "${script_path}/system/initcpio/install/archiso_kms" "${airootfs_dir}/etc/initcpio/install"
+    install -m 0755 -- "${script_path}/system/initcpio/script/archiso_shutdown" "${airootfs_dir}/etc/initcpio"
+    install -m 0644 -- "${script_path}/mkinitcpio/mkinitcpio-archiso.conf" "${airootfs_dir}/etc/mkinitcpio-archiso.conf"
     [[ "${boot_splash}" = true ]] && cp "${script_path}/mkinitcpio/mkinitcpio-archiso-plymouth.conf" "${airootfs_dir}/etc/mkinitcpio-archiso.conf"
 
     if [[ "${gpg_key}" ]]; then