From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Peter Jones <pjones@redhat.com>

Date: Fri, 9 Dec 2016 15:40:29 -0500

Subject: [PATCH] Add BLS support to grub-mkconfig

GRUB now has BootLoaderSpec support, the user can choose to use this by

setting GRUB_ENABLE_BLSCFG to true in /etc/default/grub. On this setup,

the boot menu entries are not added to the grub.cfg, instead BLS config

files are parsed by blscfg command and the entries created dynamically.

A 10_linux_bls grub.d snippet to generate menu entries from BLS files

is also added that can be used on platforms where the bootloader doesn't

have BLS support and only can parse a normal grub configuration file.

Portions of the 10_linux_bls were taken from the ostree-grub-generator

script that's included in the OSTree project.

Fixes to support multi-devices and generate a BLS section even if no

kernels are found in the boot directory were proposed by Yclept Nemo

and Tom Gundersen respectively.

Signed-off-by: Peter Jones <pjones@redhat.com>

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>

---

 Makefile.util.def           |   7 +

 util/grub-mkconfig.8        |   4 +

 util/grub-mkconfig.in       |   9 +-

 util/grub-mkconfig_lib.in   |  20 +-

 util/grub.d/10_linux.in     |  67 ++++++-

 util/grub.d/10_linux_bls.in | 478 ++++++++++++++++++++++++++++++++++++++++++++

 6 files changed, 580 insertions(+), 5 deletions(-)

 create mode 100644 util/grub.d/10_linux_bls.in

diff --git a/Makefile.util.def b/Makefile.util.def

index c39b3ce6aa9..c16c2ca545a 100644

--- a/Makefile.util.def

+++ b/Makefile.util.def

@@ -490,6 +490,13 @@ script = {

   condition = COND_HOST_LINUX;

 };

+script = {

+  name = '10_linux_bls';

+  common = util/grub.d/10_linux_bls.in;

+  installdir = grubconf;

+  condition = COND_HOST_LINUX;

+};

+

 script = {

   name = '10_xnu';

   common = util/grub.d/10_xnu.in;

diff --git a/util/grub-mkconfig.8 b/util/grub-mkconfig.8

index a2d1f577b9b..434fa4deda4 100644

--- a/util/grub-mkconfig.8

+++ b/util/grub-mkconfig.8

@@ -13,5 +13,9 @@

 \fB--output\fR=\fIFILE\fR

 Write generated output to \fIFILE\fR.

+.TP

+\fB--no-grubenv-update\fR

+Do not update variables in the grubenv file.

+

 .SH SEE ALSO

 .BR "info grub"

diff --git a/util/grub-mkconfig.in b/util/grub-mkconfig.in

index 4248b9341ab..5e643e16973 100644

--- a/util/grub-mkconfig.in

+++ b/util/grub-mkconfig.in

@@ -50,6 +50,8 @@ grub_get_kernel_settings="${sbindir}/@grub_get_kernel_settings@"

 export TEXTDOMAIN=@PACKAGE@

 export TEXTDOMAINDIR="@localedir@"

+export GRUB_GRUBENV_UPDATE="yes"

+

 . "${pkgdatadir}/grub-mkconfig_lib"

 # Usage: usage

@@ -59,6 +61,7 @@ usage () {

     gettext "Generate a grub config file"; echo

     echo

     print_option_help "-o, --output=$(gettext FILE)" "$(gettext "output generated config to FILE [default=stdout]")"

+    print_option_help "--no-grubenv-update" "$(gettext "do not update variables in the grubenv file")"

     print_option_help "-h, --help" "$(gettext "print this message and exit")"

     print_option_help "-v, --version" "$(gettext "print the version information and exit")"

     echo

@@ -94,6 +97,9 @@ do

     --output=*)

 	grub_cfg=`echo "$option" | sed 's/--output=//'`

 	;;

+    --no-grubenv-update)

+	GRUB_GRUBENV_UPDATE="no"

+	;;

     -*)

 	gettext_printf "Unrecognized option \`%s'\n" "$option" 1>&2

 	usage

@@ -259,7 +265,8 @@ export GRUB_DEFAULT \

   GRUB_OS_PROBER_SKIP_LIST \

   GRUB_DISABLE_SUBMENU \

   GRUB_DEFAULT_DTB \

-  SUSE_BTRFS_SNAPSHOT_BOOTING

+  SUSE_BTRFS_SNAPSHOT_BOOTING \

+  GRUB_ENABLE_BLSCFG

 if test "x${grub_cfg}" != "x"; then

   rm -f "${grub_cfg}.new"

diff --git a/util/grub-mkconfig_lib.in b/util/grub-mkconfig_lib.in

index b3aae534ddc..bc11df2bd84 100644

--- a/util/grub-mkconfig_lib.in

+++ b/util/grub-mkconfig_lib.in

@@ -30,6 +30,9 @@ fi

 if test "x$grub_file" = x; then

   grub_file="${bindir}/@grub_file@"

 fi

+if test "x$grub_editenv" = x; then

+  grub_editenv="${bindir}/@grub_editenv@"

+fi

 if test "x$grub_mkrelpath" = x; then

   grub_mkrelpath="${bindir}/@grub_mkrelpath@"

 fi

@@ -125,8 +128,19 @@ EOF

   fi

 }

+prepare_grub_to_access_device_with_variable ()

+{

+  device_variable="$1"

+  shift

+  prepare_grub_to_access_device "$@"

+  unset "device_variable"

+}

+

 prepare_grub_to_access_device ()

 {

+  if [ -z "$device_variable" ]; then

+    device_variable="root"

+  fi

   old_ifs="$IFS"

   IFS='

 '

@@ -161,14 +175,14 @@ prepare_grub_to_access_device ()

   # otherwise set root as per value in device.map.

   fs_hint="`"${grub_probe}" --device $@ --target=compatibility_hint`"

   if [ "x$fs_hint" != x ]; then

-    echo "set root='$fs_hint'"

+    echo "set ${device_variable}='$fs_hint'"

   fi

   if [ "x$GRUB_DISABLE_UUID" != "xtrue" ] && fs_uuid="`"${grub_probe}" --device $@ --target=fs_uuid 2> /dev/null`" ; then

     hints="`"${grub_probe}" --device $@ --target=hints_string 2> /dev/null`" || hints=

     echo "if [ x\$feature_platform_search_hint = xy ]; then"

-    echo "  search --no-floppy --fs-uuid --set=root ${hints} ${fs_uuid}"

+    echo "  search --no-floppy --fs-uuid --set=${device_variable} ${hints} ${fs_uuid}"

     echo "else"

-    echo "  search --no-floppy --fs-uuid --set=root ${fs_uuid}"

+    echo "  search --no-floppy --fs-uuid --set=${device_variable} ${fs_uuid}"

     echo "fi"

   fi

   IFS="$old_ifs"

diff --git a/util/grub.d/10_linux.in b/util/grub.d/10_linux.in

index d9a05937e46..3919b8aff4e 100644

--- a/util/grub.d/10_linux.in

+++ b/util/grub.d/10_linux.in

@@ -82,6 +82,67 @@ case x"$GRUB_FS" in

 	;;

 esac

+populate_header_warn()

+{

+cat <

+

+# This section was generated by a script. Do not modify the generated file - all changes

+# will be lost the next time file is regenerated. Instead edit the BootLoaderSpec files.

+#

+# The blscfg command parses the BootLoaderSpec files stored in /boot/loader/entries and

+# populates the boot menu. Please refer to the Boot Loader Specification documentation

+# for the files format: https://www.freedesktop.org/wiki/Specifications/BootLoaderSpec/.

+

+EOF

+}

+

+if [ "x${GRUB_ENABLE_BLSCFG}" = "xtrue" ]; then

+  if [ x$dirname = x/ ]; then

+    if [ -z "${prepare_root_cache}" ]; then

+      prepare_grub_to_access_device ${GRUB_DEVICE}

+    fi

+  else

+    if [ -z "${prepare_boot_cache}" ]; then

+      prepare_grub_to_access_device ${GRUB_DEVICE_BOOT}

+    fi

+  fi

+

+  if [ -d /sys/firmware/efi ]; then

+      bootefi_device="`${grub_probe} --target=device /boot/efi/`"

+      prepare_grub_to_access_device_with_variable boot ${bootefi_device}

+  else

+      boot_device="`${grub_probe} --target=device /boot/`"

+      prepare_grub_to_access_device_with_variable boot ${boot_device}

+  fi

+

+  populate_header_warn

+

+  cat << EOF

+set default_kernelopts="root=${LINUX_ROOT_DEVICE} ro ${GRUB_CMDLINE_LINUX}"

+

+insmod blscfg

+blscfg

+EOF

+

+  if [ "x${GRUB_GRUBENV_UPDATE}" = "xyes" ]; then

+      blsdir="/boot/loader/entries"

+      [ -d "${blsdir}" ] && GRUB_BLS_FS="$(${grub_probe} --target=fs ${blsdir})"

+      if [ "x${GRUB_BLS_FS}" = "xbtrfs" ] || [ "x${GRUB_BLS_FS}" = "xzfs" ]; then

+          blsdir=$(make_system_path_relative_to_its_root "${blsdir}")

+          if [ "x${blsdir}" != "x/loader/entries" ] && [ "x${blsdir}" != "x/boot/loader/entries" ]; then

+              ${grub_editenv} - set blsdir="${blsdir}"

+          fi

+      fi

+

+      ${grub_editenv} - set kernelopts="root=${LINUX_ROOT_DEVICE} ro ${GRUB_CMDLINE_LINUX}"

+      if [ -n "${GRUB_EARLY_INITRD_LINUX_CUSTOM}" ]; then

+          ${grub_editenv} - set early_initrd="${GRUB_EARLY_INITRD_LINUX_CUSTOM}"

+      fi

+  fi

+

+  exit 0

+fi

+

 mktitle ()

 {

   local title_type

@@ -121,6 +182,7 @@ linux_entry ()

   if [ -z "$boot_device_id" ]; then

       boot_device_id="$(grub_get_device_id "${GRUB_DEVICE}")"

   fi

+

   if [ x$type != xsimple ] ; then

       title=$(mktitle "$type" "$version")

       if [ x"$title" = x"$GRUB_ACTUAL_DEFAULT" ] || [ x"Previous Linux versions>$title" = x"$GRUB_ACTUAL_DEFAULT" ]; then

@@ -224,6 +286,7 @@ is_top_level=true

 while [ "x$list" != "x" ] ; do

   linux=`version_find_latest $list`

   gettext_printf "Found linux image: %s\n" "$linux" >&2

+

   basename=`basename $linux`

   dirname=`dirname $linux`

   rel_dirname=`make_system_path_relative_to_its_root $dirname`

@@ -262,7 +325,9 @@ while [ "x$list" != "x" ] ; do

     for i in ${initrd}; do

       initrd_display="${initrd_display} ${dirname}/${i}"

     done

-    gettext_printf "Found initrd image: %s\n" "$(echo $initrd_display)" >&2

+    if [ "x${GRUB_ENABLE_BLSCFG}" != "xtrue" ]; then

+      gettext_printf "Found initrd image: %s\n" "$(echo $initrd_display)" >&2

+    fi

   fi

   fdt=

diff --git a/util/grub.d/10_linux_bls.in b/util/grub.d/10_linux_bls.in

new file mode 100644

index 00000000000..1b7536435f1

--- /dev/null

+++ b/util/grub.d/10_linux_bls.in

@@ -0,0 +1,478 @@

+#! /bin/sh

+set -e

+

+# grub-mkconfig helper script.

+# Copyright (C) 2006,2007,2008,2009,2010  Free Software Foundation, Inc.

+#

+# GRUB is free software: you can redistribute it and/or modify

+# it under the terms of the GNU General Public License as published by

+# the Free Software Foundation, either version 3 of the License, or

+# (at your option) any later version.

+#

+# GRUB is distributed in the hope that it will be useful,

+# but WITHOUT ANY WARRANTY; without even the implied warranty of

+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+# GNU General Public License for more details.

+#

+# You should have received a copy of the GNU General Public License

+# along with GRUB.  If not, see <http://www.gnu.org/licenses/>.

+

+prefix="@prefix@"

+exec_prefix="@exec_prefix@"

+datarootdir="@datarootdir@"

+

+. "$pkgdatadir/grub-mkconfig_lib"

+

+export TEXTDOMAIN=@PACKAGE@

+export TEXTDOMAINDIR="@localedir@"

+

+CLASS="--class gnu-linux --class gnu --class os --unrestricted"

+

+if [ "x${GRUB_DISTRIBUTOR}" = "x" ] ; then

+  OS="$(eval $(grep PRETTY_NAME /etc/os-release) ; echo ${PRETTY_NAME})"

+  CLASS="--class $(eval $(grep '^ID_LIKE=\|^ID=' /etc/os-release) ; [ -n "${ID_LIKE}" ] && echo ${ID_LIKE} || echo ${ID}) ${CLASS}"

+else

+  OS="${GRUB_DISTRIBUTOR}"

+  CLASS="--class $(echo ${GRUB_DISTRIBUTOR} | tr 'A-Z' 'a-z' | cut -d' ' -f1|LC_ALL=C sed 's,[^[:alnum:]_],_,g') ${CLASS}"

+fi

+

+# loop-AES arranges things so that /dev/loop/X can be our root device, but

+# the initrds that Linux uses don't like that.

+case ${GRUB_DEVICE} in

+  /dev/loop/*|/dev/loop[0-9])

+    GRUB_DEVICE=`losetup ${GRUB_DEVICE} | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/"`

+  ;;

+esac

+

+# Default to disabling partition uuid support to maintian compatibility with

+# older kernels.

+GRUB_DISABLE_LINUX_PARTUUID=${GRUB_DISABLE_LINUX_PARTUUID-true}

+

+# btrfs may reside on multiple devices. We cannot pass them as value of root= parameter

+# and mounting btrfs requires user space scanning, so force UUID in this case.

+if ( [ "x${GRUB_DEVICE_UUID}" = "x" ] && [ "x${GRUB_DEVICE_PARTUUID}" = "x" ] ) \

+    || ( [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ] \

+	&& [ "x${GRUB_DISABLE_LINUX_PARTUUID}" = "xtrue" ] ) \

+    || ( ! test -e "/dev/disk/by-uuid/${GRUB_DEVICE_UUID}" \

+	&& ! test -e "/dev/disk/by-partuuid/${GRUB_DEVICE_PARTUUID}" ) \

+    || ( test -e "${GRUB_DEVICE}" && uses_abstraction "${GRUB_DEVICE}" lvm ); then

+  LINUX_ROOT_DEVICE=${GRUB_DEVICE}

+elif [ "x${GRUB_DEVICE_UUID}" = "x" ] \

+    || [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ]; then

+  LINUX_ROOT_DEVICE=PARTUUID=${GRUB_DEVICE_PARTUUID}

+else

+  LINUX_ROOT_DEVICE=UUID=${GRUB_DEVICE_UUID}

+fi

+

+case x"$GRUB_FS" in

+    xbtrfs)

+	if [ "x${SUSE_BTRFS_SNAPSHOT_BOOTING}" = "xtrue" ]; then

+	GRUB_CMDLINE_LINUX="${GRUB_CMDLINE_LINUX} \${extra_cmdline}"

+	else

+	rootsubvol="`make_system_path_relative_to_its_root /`"

+	rootsubvol="${rootsubvol#/}"

+	if [ "x${rootsubvol}" != x ]; then

+	    GRUB_CMDLINE_LINUX="rootflags=subvol=${rootsubvol} ${GRUB_CMDLINE_LINUX}"

+	fi

+	fi;;

+    xzfs)

+	rpool=`${grub_probe} --device ${GRUB_DEVICE} --target=fs_label 2>/dev/null || true`

+	bootfs="`make_system_path_relative_to_its_root / | sed -e "s,@$,,"`"

+	LINUX_ROOT_DEVICE="ZFS=${rpool}${bootfs}"

+	;;

+esac

+

+mktitle ()

+{

+  local title_type

+  local version

+  local OS_NAME

+  local OS_VERS

+

+  title_type=$1 && shift

+  version=$1 && shift

+

+  OS_NAME="$(eval $(grep ^NAME= /etc/os-release) ; echo ${NAME})"

+  OS_VERS="$(eval $(grep ^VERSION= /etc/os-release) ; echo ${VERSION})"

+

+  case $title_type in

+    recovery)

+      title=$(printf '%s (%s) %s (recovery mode)' \

+                     "${OS_NAME}" "${version}" "${OS_VERS}")

+      ;;

+    *)

+      title=$(printf '%s (%s) %s' \

+                     "${OS_NAME}" "${version}" "${OS_VERS}")

+      ;;

+  esac

+  echo -n ${title}

+}

+

+title_correction_code=

+

+populate_header_warn()

+{

+cat <

+

+# This section was generated by a script. Do not modify the generated file - all changes

+# will be lost the next time file is regenerated. Instead edit the BootLoaderSpec files.

+

+EOF

+}

+

+read_config()

+{

+    config_file=${1}

+    title=""

+    initrd=""

+    options=""

+    linux=""

+    grub_users=""

+    grub_arg=""

+    grub_class=""

+

+    while read -r line

+    do

+        record=$(echo ${line} | cut -f 1 -d ' ')

+        value=$(echo ${line} | cut -s -f2- -d ' ')

+        case "${record}" in

+            "title")

+                title=${value}

+                ;;

+            "initrd")

+                initrd=${value}

+                ;;

+            "linux")

+                linux=${value}

+                ;;

+            "options")

+                options=${value}

+                ;;

+            "grub_users")

+                grub_users=${value}

+                ;;

+            "grub_arg")

+                grub_arg=${value}

+                ;;

+            "grub_class")

+                grub_class=${value}

+                ;;

+        esac

+    done < ${config_file}

+}

+

+populate_menu()

+{

+    blsdir="/boot/loader/entries"

+    local -a files

+    local IFS=$'\n'

+    gettext_printf "Generating boot entries from BLS files...\n" >&2

+

+    files=($(for bls in ${blsdir}/*.conf ; do

+        if ! [[ -e "${bls}" ]] ; then

+            continue

+        fi

+        bls="${bls%.conf}"

+        bls="${bls##*/}"

+        echo "${bls}"

+    done | ${kernel_sort} | tac)) || :

+

+    for bls in "${files[@]}" ; do

+        read_config "${blsdir}/${bls}.conf"

+

+        menu="${menu}menuentry '${title}' --class ${grub_class} ${grub_arg} --id=${bls} {\n"

+        menu="${menu}\t linux ${linux} ${options}\n"

+        if [ -n "${initrd}" ] ; then

+            menu="${menu}\t initrd ${boot_prefix}${initrd}\n"

+        fi

+        menu="${menu}}\n\n"

+    done

+    # The printf command seems to be more reliable across shells for special character (\n, \t) evaluation

+    printf "$menu"

+}

+

+linux_entry ()

+{

+  os="$1"

+  version="$2"

+  type="$3"

+  isdebug="$4"

+  args="$5"

+

+  if [ -z "$boot_device_id" ]; then

+      boot_device_id="$(grub_get_device_id "${GRUB_DEVICE}")"

+  fi

+

+  if [ "x${GRUB_ENABLE_BLSCFG}" = "xtrue" ]; then

+    if [ x$dirname = x/ ]; then

+      if [ -z "${prepare_root_cache}" ]; then

+        prepare_grub_to_access_device ${GRUB_DEVICE}

+      fi

+    else

+      if [ -z "${prepare_boot_cache}" ]; then

+        prepare_grub_to_access_device ${GRUB_DEVICE_BOOT}

+      fi

+    fi

+

+    if [ -d /sys/firmware/efi ]; then

+        bootefi_device="`${grub_probe} --target=device /boot/efi/`"

+        prepare_grub_to_access_device_with_variable boot ${bootefi_device}

+    else

+        boot_device="`${grub_probe} --target=device /boot/`"

+        prepare_grub_to_access_device_with_variable boot ${boot_device}

+    fi

+

+    populate_header_warn

+    populate_menu

+

+    if [ "x${GRUB_GRUBENV_UPDATE}" = "xyes" ]; then

+        blsdir="/boot/loader/entries"

+        [ -d "${blsdir}" ] && GRUB_BLS_FS="$(${grub_probe} --target=fs ${blsdir})"

+        if [ "x${GRUB_BLS_FS}" = "xbtrfs" ] || [ "x${GRUB_BLS_FS}" = "xzfs" ]; then

+            blsdir=$(make_system_path_relative_to_its_root "${blsdir}")

+            if [ "x${blsdir}" != "x/loader/entries" ] && [ "x${blsdir}" != "x/boot/loader/entries" ]; then

+                ${grub_editenv} - set blsdir="${blsdir}"

+            fi

+        fi

+

+	${grub_editenv} - set kernelopts="root=${linux_root_device_thisversion} ro ${args}"

+	if [ -n "${GRUB_EARLY_INITRD_LINUX_CUSTOM}" ]; then

+	    ${grub_editenv} - set early_initrd="${GRUB_EARLY_INITRD_LINUX_CUSTOM}"

+	fi

+    fi

+

+    exit 0

+  fi

+

+  if [ x$type != xsimple ] ; then

+      title=$(mktitle "$type" "$version")

+      if [ x"$title" = x"$GRUB_ACTUAL_DEFAULT" ] || [ x"Previous Linux versions>$title" = x"$GRUB_ACTUAL_DEFAULT" ]; then

+	  replacement_title="$(echo "Advanced options for ${OS}" | sed 's,>,>>,g')>$(echo "$title" | sed 's,>,>>,g')"

+	  quoted="$(echo "$GRUB_ACTUAL_DEFAULT" | grub_quote)"

+	  title_correction_code="${title_correction_code}if [ \"x\$default\" = '$quoted' ]; then default='$(echo "$replacement_title" | grub_quote)'; fi;"

+      fi

+      if [ x$isdebug = xdebug ]; then

+	  title="$title${GRUB_LINUX_DEBUG_TITLE_POSTFIX}"

+      fi

+      echo "menuentry '$(echo "$title" | grub_quote)' ${CLASS} \$menuentry_id_option 'gnulinux-$version-$type-$boot_device_id' {" | sed "s/^/$submenu_indentation/"

+  else

+      echo "menuentry '$(echo "$os" | grub_quote)' ${CLASS} \$menuentry_id_option 'gnulinux-simple-$boot_device_id' {" | sed "s/^/$submenu_indentation/"

+  fi

+  if [ x$type != xrecovery ] ; then

+      save_default_entry | grub_add_tab

+  fi

+

+  # Use ELILO's generic "efifb" when it's known to be available.

+  # FIXME: We need an interface to select vesafb in case efifb can't be used.

+  if [ "x$GRUB_GFXPAYLOAD_LINUX" = x ]; then

+      echo "	load_video" | sed "s/^/$submenu_indentation/"

+      if grep -qx "CONFIG_FB_EFI=y" "${config}" 2> /dev/null \

+	  && grep -qx "CONFIG_VT_HW_CONSOLE_BINDING=y" "${config}" 2> /dev/null; then

+	  echo "	set gfxpayload=keep" | sed "s/^/$submenu_indentation/"

+      fi

+  else

+      if [ "x$GRUB_GFXPAYLOAD_LINUX" != xtext ]; then

+	  echo "	load_video" | sed "s/^/$submenu_indentation/"

+      fi

+      echo "	set gfxpayload=$GRUB_GFXPAYLOAD_LINUX" | sed "s/^/$submenu_indentation/"

+  fi

+

+  echo "	insmod gzio" | sed "s/^/$submenu_indentation/"

+

+  if [ x$dirname = x/ ]; then

+    if [ -z "${prepare_root_cache}" ]; then

+      prepare_root_cache="$(prepare_grub_to_access_device ${GRUB_DEVICE} | grub_add_tab)"

+    fi

+    printf '%s\n' "${prepare_root_cache}" | sed "s/^/$submenu_indentation/"

+  else

+    if [ -z "${prepare_boot_cache}" ]; then

+      prepare_boot_cache="$(prepare_grub_to_access_device ${GRUB_DEVICE_BOOT} | grub_add_tab)"

+    fi

+    printf '%s\n' "${prepare_boot_cache}" | sed "s/^/$submenu_indentation/"

+  fi

+  sed "s/^/$submenu_indentation/" << EOF

+	linux	${rel_dirname}/${basename} root=${linux_root_device_thisversion} ro ${args}

+EOF

+  if test -n "${initrd}" ; then

+    initrd_path=

+    for i in ${initrd}; do

+      initrd_path="${initrd_path} ${rel_dirname}/${i}"

+    done

+    sed "s/^/$submenu_indentation/" << EOF

+	initrd	$(echo $initrd_path)

+EOF

+  fi

+  if test -n "${fdt}" ; then

+    sed "s/^/$submenu_indentation/" << EOF

+	devicetree	${rel_dirname}/${fdt}

+EOF

+  fi

+  sed "s/^/$submenu_indentation/" << EOF

+}

+EOF

+}

+

+machine=`uname -m`

+case "x$machine" in

+    xi?86 | xx86_64)

+	list=

+	for i in /boot/vmlinuz-* /vmlinuz-* /boot/kernel-* ; do

+	    if grub_file_is_not_garbage "$i" ; then list="$list $i" ; fi

+	done ;;

+    *)

+	list=

+	for i in /boot/vmlinuz-* /boot/vmlinux-* /vmlinuz-* /vmlinux-* /boot/kernel-* ; do

+                  if grub_file_is_not_garbage "$i" ; then list="$list $i" ; fi

+	done ;;

+esac

+

+if [ "x${GRUB_ENABLE_BLSCFG}" = "xtrue" ]; then

+    for i in /boot/ostree/*/vmlinuz-* ; do

+        if grub_file_is_not_garbage "$i" ; then list="$list $i" ; fi

+    done

+fi

+

+case "$machine" in

+    i?86) GENKERNEL_ARCH="x86" ;;

+    mips|mips64) GENKERNEL_ARCH="mips" ;;

+    mipsel|mips64el) GENKERNEL_ARCH="mipsel" ;;

+    arm*) GENKERNEL_ARCH="arm" ;;

+    *) GENKERNEL_ARCH="$machine" ;;

+esac

+

+prepare_boot_cache=

+prepare_root_cache=

+boot_device_id=

+title_correction_code=

+

+# Extra indentation to add to menu entries in a submenu. We're not in a submenu

+# yet, so it's empty. In a submenu it will be equal to '\t' (one tab).

+submenu_indentation=""

+

+is_top_level=true

+while [ "x$list" != "x" ] ; do

+  linux=`version_find_latest $list`

+  if [ "x${GRUB_ENABLE_BLSCFG}" != "xtrue" ]; then

+    gettext_printf "Found linux image: %s\n" "$linux" >&2

+  fi

+

+  basename=`basename $linux`

+  dirname=`dirname $linux`

+  rel_dirname=`make_system_path_relative_to_its_root $dirname`

+  version=`echo $basename | sed -e "s,^[^0-9]*-,,g"`

+  alt_version=`echo $version | sed -e "s,\.old$,,g"`

+  linux_root_device_thisversion="${LINUX_ROOT_DEVICE}"

+

+  initrd_early=

+  for i in ${GRUB_EARLY_INITRD_LINUX_STOCK} \

+	   ${GRUB_EARLY_INITRD_LINUX_CUSTOM}; do

+    if test -e "${dirname}/${i}" ; then

+      initrd_early="${initrd_early} ${i}"

+    fi

+  done

+

+  initrd_real=

+  for i in "initrd.img-${version}" "initrd-${version}.img" "initrd-${version}.gz" \

+	   "initrd-${version}" "initramfs-${version}.img" \

+	   "initrd.img-${alt_version}" "initrd-${alt_version}.img" \

+	   "initrd-${alt_version}" "initramfs-${alt_version}.img" \

+	   "initramfs-genkernel-${version}" \

+	   "initramfs-genkernel-${alt_version}" \

+	   "initramfs-genkernel-${GENKERNEL_ARCH}-${version}" \

+	   "initramfs-genkernel-${GENKERNEL_ARCH}-${alt_version}"; do

+    if test -e "${dirname}/${i}" ; then

+      initrd_real="${i}"

+      break

+    fi

+  done

+

+  initrd=

+  if test -n "${initrd_early}" || test -n "${initrd_real}"; then

+    initrd="${initrd_early} ${initrd_real}"

+

+    initrd_display=

+    for i in ${initrd}; do

+      initrd_display="${initrd_display} ${dirname}/${i}"

+    done

+    if [ "x${GRUB_ENABLE_BLSCFG}" != "xtrue" ]; then

+      gettext_printf "Found initrd image: %s\n" "$(echo $initrd_display)" >&2

+    fi

+  fi

+

+  fdt=

+  for i in "dtb-${version}" "dtb-${alt_version}"; do

+    if test -f "${dirname}/${i}/${GRUB_DEFAULT_DTB}" ; then

+      fdt="${i}/${GRUB_DEFAULT_DTB}"

+      break

+    fi

+  done

+

+  config=

+  for i in "${dirname}/config-${version}" "${dirname}/config-${alt_version}" "/etc/kernels/kernel-config-${version}" ; do

+    if test -e "${i}" ; then

+      config="${i}"

+      break

+    fi

+  done

+

+  initramfs=

+  if test -n "${config}" ; then

+      initramfs=`grep CONFIG_INITRAMFS_SOURCE= "${config}" | cut -f2 -d= | tr -d \"`

+  fi

+

+  if test -z "${initramfs}" && test -z "${initrd_real}" ; then

+    # "UUID=" and "ZFS=" magic is parsed by initrd or initramfs.  Since there's

+    # no initrd or builtin initramfs, it can't work here.

+    if [ "x${GRUB_DEVICE_PARTUUID}" = "x" ] \

+	|| [ "x${GRUB_DISABLE_LINUX_PARTUUID}" = "xtrue" ]; then

+

+	linux_root_device_thisversion=${GRUB_DEVICE}

+    else

+	linux_root_device_thisversion=PARTUUID=${GRUB_DEVICE_PARTUUID}

+    fi

+  fi

+

+  if [ "x${GRUB_DISABLE_SUBMENU}" = "xyes" ] || [ "x${GRUB_DISABLE_SUBMENU}" = "xy" ]; then

+    GRUB_DISABLE_SUBMENU="true"

+  fi

+

+  if [ "x$is_top_level" = xtrue ] && [ "x${GRUB_DISABLE_SUBMENU}" != xtrue ]; then

+    linux_entry "${OS}" "${version}" simple standard \

+    "${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}"

+    if [ "x$GRUB_LINUX_MAKE_DEBUG" = "xtrue" ]; then

+      linux_entry "${OS}" "${version}" simple debug \

+        "${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT} ${GRUB_CMDLINE_LINUX_DEBUG}"

+    fi

+

+    submenu_indentation="$grub_tab"

+

+    if [ -z "$boot_device_id" ]; then

+	boot_device_id="$(grub_get_device_id "${GRUB_DEVICE}")"

+    fi

+    # TRANSLATORS: %s is replaced with an OS name

+    echo "submenu '$(gettext_printf "Advanced options for %s" "${OS}" | grub_quote)' \$menuentry_id_option 'gnulinux-advanced-$boot_device_id' {"