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Blame SOURCES/0237-add-10_linux_bls-grub.d-snippet-to-generate-menu-ent.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Javier Martinez Canillas <javierm@redhat.com>
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Date: Wed, 3 Oct 2018 20:48:32 +0200
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Subject: [PATCH] add 10_linux_bls grub.d snippet to generate menu entries from
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 BLS files
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This grub.d snippet can be used on platforms where the bootloader doesn't
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have BLS support and only can parse a normal grub configuration file.
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Portions of this script were taken from the ostree-grub-generator script
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included in the OSTree project.
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Resolves: rhbz#1636013
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Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
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---
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 Makefile.util.def           |   7 +
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 util/grub.d/10_linux_bls.in | 440 ++++++++++++++++++++++++++++++++++++++++++++
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 2 files changed, 447 insertions(+)
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 create mode 100644 util/grub.d/10_linux_bls.in
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diff --git a/Makefile.util.def b/Makefile.util.def
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index cba4d500198..08cc98ddb8b 100644
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--- a/Makefile.util.def
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+++ b/Makefile.util.def
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@@ -502,6 +502,13 @@ script = {
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   condition = COND_HOST_LINUX;
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 };
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+script = {
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+  name = '10_linux_bls';
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+  common = util/grub.d/10_linux_bls.in;
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+  installdir = grubconf;
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+  condition = COND_HOST_LINUX;
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+};
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+
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 script = {
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   name = '10_xnu';
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   common = util/grub.d/10_xnu.in;
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diff --git a/util/grub.d/10_linux_bls.in b/util/grub.d/10_linux_bls.in
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new file mode 100644
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index 00000000000..3cc7803c6a1
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--- /dev/null
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+++ b/util/grub.d/10_linux_bls.in
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@@ -0,0 +1,440 @@
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+#! /bin/sh
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+set -e
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+
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+# grub-mkconfig helper script.
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+# Copyright (C) 2006,2007,2008,2009,2010  Free Software Foundation, Inc.
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+#
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+# GRUB is free software: you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License as published by
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+# the Free Software Foundation, either version 3 of the License, or
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+# (at your option) any later version.
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+#
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+# GRUB is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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+# GNU General Public License for more details.
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+#
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+# You should have received a copy of the GNU General Public License
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+# along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
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+
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+prefix="@prefix@"
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+exec_prefix="@exec_prefix@"
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+datarootdir="@datarootdir@"
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+
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+. "$pkgdatadir/grub-mkconfig_lib"
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+
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+export TEXTDOMAIN=@PACKAGE@
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+export TEXTDOMAINDIR="@localedir@"
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+
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+CLASS="--class gnu-linux --class gnu --class os --unrestricted"
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+
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+if [ "x${GRUB_DISTRIBUTOR}" = "x" ] ; then
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+  OS="$(eval $(grep PRETTY_NAME /etc/os-release) ; echo ${PRETTY_NAME})"
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+  CLASS="--class $(eval $(grep '^ID_LIKE=\|^ID=' /etc/os-release) ; [ -n "${ID_LIKE}" ] && echo ${ID_LIKE} || echo ${ID}) ${CLASS}"
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+else
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+  OS="${GRUB_DISTRIBUTOR}"
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+  CLASS="--class $(echo ${GRUB_DISTRIBUTOR} | tr 'A-Z' 'a-z' | cut -d' ' -f1|LC_ALL=C sed 's,[^[:alnum:]_],_,g') ${CLASS}"
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+fi
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+
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+# loop-AES arranges things so that /dev/loop/X can be our root device, but
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+# the initrds that Linux uses don't like that.
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+case ${GRUB_DEVICE} in
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+  /dev/loop/*|/dev/loop[0-9])
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+    GRUB_DEVICE=`losetup ${GRUB_DEVICE} | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/"`
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+  ;;
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+esac
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+
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+# Default to disabling partition uuid support to maintian compatibility with
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+# older kernels.
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+GRUB_DISABLE_LINUX_PARTUUID=${GRUB_DISABLE_LINUX_PARTUUID-true}
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+
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+# btrfs may reside on multiple devices. We cannot pass them as value of root= parameter
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+# and mounting btrfs requires user space scanning, so force UUID in this case.
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+if ( [ "x${GRUB_DEVICE_UUID}" = "x" ] && [ "x${GRUB_DEVICE_PARTUUID}" = "x" ] ) \
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+    || ( [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ] \
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+	&& [ "x${GRUB_DISABLE_LINUX_PARTUUID}" = "xtrue" ] ) \
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+    || ( ! test -e "/dev/disk/by-uuid/${GRUB_DEVICE_UUID}" \
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+	&& ! test -e "/dev/disk/by-partuuid/${GRUB_DEVICE_PARTUUID}" ) \
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+    || ( test -e "${GRUB_DEVICE}" && uses_abstraction "${GRUB_DEVICE}" lvm ); then
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+  LINUX_ROOT_DEVICE=${GRUB_DEVICE}
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+elif [ "x${GRUB_DEVICE_UUID}" = "x" ] \
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+    || [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ]; then
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+  LINUX_ROOT_DEVICE=PARTUUID=${GRUB_DEVICE_PARTUUID}
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+else
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+  LINUX_ROOT_DEVICE=UUID=${GRUB_DEVICE_UUID}
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+fi
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+
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+case x"$GRUB_FS" in
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+    xbtrfs)
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+	if [ "x${SUSE_BTRFS_SNAPSHOT_BOOTING}" = "xtrue" ]; then
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+	GRUB_CMDLINE_LINUX="${GRUB_CMDLINE_LINUX} \${extra_cmdline}"
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+	else
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+	rootsubvol="`make_system_path_relative_to_its_root /`"
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+	rootsubvol="${rootsubvol#/}"
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+	if [ "x${rootsubvol}" != x ]; then
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+	    GRUB_CMDLINE_LINUX="rootflags=subvol=${rootsubvol} ${GRUB_CMDLINE_LINUX}"
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+	fi
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+	fi;;
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+    xzfs)
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+	rpool=`${grub_probe} --device ${GRUB_DEVICE} --target=fs_label 2>/dev/null || true`
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+	bootfs="`make_system_path_relative_to_its_root / | sed -e "s,@$,,"`"
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+	LINUX_ROOT_DEVICE="ZFS=${rpool}${bootfs}"
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+	;;
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+esac
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+
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+mktitle ()
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+{
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+  local title_type
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+  local version
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+  local OS_NAME
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+  local OS_VERS
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+
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+  title_type=$1 && shift
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+  version=$1 && shift
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+
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+  OS_NAME="$(eval $(grep ^NAME= /etc/os-release) ; echo ${NAME})"
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+  OS_VERS="$(eval $(grep ^VERSION= /etc/os-release) ; echo ${VERSION})"
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+
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+  case $title_type in
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+    recovery)
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+      title=$(printf '%s (%s) %s (recovery mode)' \
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+                     "${OS_NAME}" "${version}" "${OS_VERS}")
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+      ;;
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+    *)
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+      title=$(printf '%s (%s) %s' \
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+                     "${OS_NAME}" "${version}" "${OS_VERS}")
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+      ;;
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+  esac
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+  echo -n ${title}
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+}
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+
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+title_correction_code=
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+
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+populate_header_warn()
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+{
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+cat <
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+
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+# This section was generated by a script. Do not modify the generated file - all changes
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+# will be lost the next time file is regenerated. Instead edit the BootLoaderSpec files.
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+
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+EOF
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+}
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+
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+read_config()
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+{
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+    config_file=${1}
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+    title=""
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+    initrd=""
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+    options=""
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+    linux=""
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+
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+    while read -r line
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+    do
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+        record=$(echo ${line} | cut -f 1 -d ' ')
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+        value=$(echo ${line} | cut -s -f2- -d ' ')
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+        case "${record}" in
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+            "title")
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+                title=${value}
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+                ;;
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+            "initrd")
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+                initrd=${value}
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+                ;;
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+            "linux")
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+                linux=${value}
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+                ;;
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+            "options")
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+                options=${value}
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+                ;;
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+        esac
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+    done < ${config_file}
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+}
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+
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+populate_menu()
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+{
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+    entries_path="/boot/loader/entries"
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+    gettext_printf "Generating boot entries from BLS files...\n" >&2
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+    for config in $(ls -v -r $entries_path/*.conf); do
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+        read_config ${config}
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+        menu="${menu}menuentry '${title}' {\n"
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+        menu="${menu}\t linux ${linux} ${options}\n"
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+        if [ -n "${initrd}" ] ; then
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+            menu="${menu}\t initrd ${boot_prefix}${initrd}\n"
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+        fi
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+        menu="${menu}}\n\n"
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+    done
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+    # The printf command seems to be more reliable across shells for special character (\n, \t) evaluation
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+    printf "$menu"
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+}
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+
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+linux_entry ()
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+{
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+  os="$1"
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+  version="$2"
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+  type="$3"
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+  isdebug="$4"
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+  args="$5"
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+
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+  if [ -z "$boot_device_id" ]; then
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+      boot_device_id="$(grub_get_device_id "${GRUB_DEVICE}")"
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+  fi
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+
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+  if [ "x${GRUB_ENABLE_BLSCFG}" = "xtrue" ]; then
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+    if [ x$dirname = x/ ]; then
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+      if [ -z "${prepare_root_cache}" ]; then
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+        prepare_grub_to_access_device ${GRUB_DEVICE}
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+      fi
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+    else
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+      if [ -z "${prepare_boot_cache}" ]; then
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+        prepare_grub_to_access_device ${GRUB_DEVICE_BOOT}
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+      fi
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+    fi
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+
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+    if [ -d /sys/firmware/efi ]; then
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+        bootefi_device="`${grub_probe} --target=device /boot/efi/`"
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+        prepare_grub_to_access_device ${bootefi_device} boot
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+    else
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+        boot_device="`${grub_probe} --target=device /boot/`"
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+        prepare_grub_to_access_device ${boot_device} boot
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+    fi
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+
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+    populate_header_warn
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+    populate_menu
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+
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+    ${grub_editenv} - set saved_entry=0
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+    ${grub_editenv} - set kernelopts="root=${linux_root_device_thisversion} ro ${args}"
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+
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+    exit 0
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+  fi
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+
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+  if [ x$type != xsimple ] ; then
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+      title=$(mktitle "$type" "$version")
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+      if [ x"$title" = x"$GRUB_ACTUAL_DEFAULT" ] || [ x"Previous Linux versions>$title" = x"$GRUB_ACTUAL_DEFAULT" ]; then
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+	  replacement_title="$(echo "Advanced options for ${OS}" | sed 's,>,>>,g')>$(echo "$title" | sed 's,>,>>,g')"
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+	  quoted="$(echo "$GRUB_ACTUAL_DEFAULT" | grub_quote)"
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+	  title_correction_code="${title_correction_code}if [ \"x\$default\" = '$quoted' ]; then default='$(echo "$replacement_title" | grub_quote)'; fi;"
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+      fi
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+      if [ x$isdebug = xdebug ]; then
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+	  title="$title${GRUB_LINUX_DEBUG_TITLE_POSTFIX}"
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+      fi
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+      echo "menuentry '$(echo "$title" | grub_quote)' ${CLASS} \$menuentry_id_option 'gnulinux-$version-$type-$boot_device_id' {" | sed "s/^/$submenu_indentation/"
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+  else
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+      echo "menuentry '$(echo "$os" | grub_quote)' ${CLASS} \$menuentry_id_option 'gnulinux-simple-$boot_device_id' {" | sed "s/^/$submenu_indentation/"
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+  fi
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+  if [ x$type != xrecovery ] ; then
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+      save_default_entry | grub_add_tab
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+  fi
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+
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+  # Use ELILO's generic "efifb" when it's known to be available.
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+  # FIXME: We need an interface to select vesafb in case efifb can't be used.
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+  if [ "x$GRUB_GFXPAYLOAD_LINUX" = x ]; then
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+      echo "	load_video" | sed "s/^/$submenu_indentation/"
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+      if grep -qx "CONFIG_FB_EFI=y" "${config}" 2> /dev/null \
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+	  && grep -qx "CONFIG_VT_HW_CONSOLE_BINDING=y" "${config}" 2> /dev/null; then
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+	  echo "	set gfxpayload=keep" | sed "s/^/$submenu_indentation/"
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+      fi
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+  else
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+      if [ "x$GRUB_GFXPAYLOAD_LINUX" != xtext ]; then
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+	  echo "	load_video" | sed "s/^/$submenu_indentation/"
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+      fi
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+      echo "	set gfxpayload=$GRUB_GFXPAYLOAD_LINUX" | sed "s/^/$submenu_indentation/"
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+  fi
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+
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+  echo "	insmod gzio" | sed "s/^/$submenu_indentation/"
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+
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+  if [ x$dirname = x/ ]; then
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+    if [ -z "${prepare_root_cache}" ]; then
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+      prepare_root_cache="$(prepare_grub_to_access_device ${GRUB_DEVICE} | grub_add_tab)"
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+    fi
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+    printf '%s\n' "${prepare_root_cache}" | sed "s/^/$submenu_indentation/"
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+  else
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+    if [ -z "${prepare_boot_cache}" ]; then
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+      prepare_boot_cache="$(prepare_grub_to_access_device ${GRUB_DEVICE_BOOT} | grub_add_tab)"
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+    fi
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+    printf '%s\n' "${prepare_boot_cache}" | sed "s/^/$submenu_indentation/"
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+  fi
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+  sed "s/^/$submenu_indentation/" << EOF
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+	linux	${rel_dirname}/${basename} root=${linux_root_device_thisversion} ro ${args}
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+EOF
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+  if test -n "${initrd}" ; then
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+    initrd_path=
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+    for i in ${initrd}; do
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+      initrd_path="${initrd_path} ${rel_dirname}/${i}"
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+    done
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+    sed "s/^/$submenu_indentation/" << EOF
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+	initrd	$(echo $initrd_path)
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+EOF
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+  fi
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+  if test -n "${fdt}" ; then
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+    sed "s/^/$submenu_indentation/" << EOF
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+	devicetree	${rel_dirname}/${fdt}
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+EOF
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+  fi
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+  sed "s/^/$submenu_indentation/" << EOF
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+}
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+EOF
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+}
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+
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+machine=`uname -m`
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+case "x$machine" in
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+    xi?86 | xx86_64)
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+	list=
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+	for i in /boot/vmlinuz-* /vmlinuz-* /boot/kernel-* ; do
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+	    if grub_file_is_not_garbage "$i" ; then list="$list $i" ; fi
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+	done ;;
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+    *)
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+	list=
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+	for i in /boot/vmlinuz-* /boot/vmlinux-* /vmlinuz-* /vmlinux-* /boot/kernel-* ; do
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+                  if grub_file_is_not_garbage "$i" ; then list="$list $i" ; fi
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+	done ;;
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+esac
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+
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+if [ "x${GRUB_ENABLE_BLSCFG}" = "xtrue" ]; then
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+    for i in /boot/ostree/*/vmlinuz-* ; do
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+        if grub_file_is_not_garbage "$i" ; then list="$list $i" ; fi
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+    done
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+fi
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+
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+case "$machine" in
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+    i?86) GENKERNEL_ARCH="x86" ;;
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+    mips|mips64) GENKERNEL_ARCH="mips" ;;
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+    mipsel|mips64el) GENKERNEL_ARCH="mipsel" ;;
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+    arm*) GENKERNEL_ARCH="arm" ;;
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+    *) GENKERNEL_ARCH="$machine" ;;
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+esac
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+
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+prepare_boot_cache=
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+prepare_root_cache=
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+boot_device_id=
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+title_correction_code=
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+
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+# Extra indentation to add to menu entries in a submenu. We're not in a submenu
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+# yet, so it's empty. In a submenu it will be equal to '\t' (one tab).
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+submenu_indentation=""
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+
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+is_top_level=true
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+while [ "x$list" != "x" ] ; do
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+  linux=`version_find_latest $list`
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+  if [ "x${GRUB_ENABLE_BLSCFG}" != "xtrue" ]; then
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+    gettext_printf "Found linux image: %s\n" "$linux" >&2
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+  fi
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+
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+  basename=`basename $linux`
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+  dirname=`dirname $linux`
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+  rel_dirname=`make_system_path_relative_to_its_root $dirname`
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+  version=`echo $basename | sed -e "s,^[^0-9]*-,,g"`
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+  alt_version=`echo $version | sed -e "s,\.old$,,g"`
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+  linux_root_device_thisversion="${LINUX_ROOT_DEVICE}"
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+
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+  initrd_early=
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+  for i in ${GRUB_EARLY_INITRD_LINUX_STOCK} \
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+	   ${GRUB_EARLY_INITRD_LINUX_CUSTOM}; do
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+    if test -e "${dirname}/${i}" ; then
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+      initrd_early="${initrd_early} ${i}"
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+    fi
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+  done
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+
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+  initrd_real=
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+  for i in "initrd.img-${version}" "initrd-${version}.img" "initrd-${version}.gz" \
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+	   "initrd-${version}" "initramfs-${version}.img" \
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+	   "initrd.img-${alt_version}" "initrd-${alt_version}.img" \
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+	   "initrd-${alt_version}" "initramfs-${alt_version}.img" \
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+	   "initramfs-genkernel-${version}" \
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+	   "initramfs-genkernel-${alt_version}" \
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+	   "initramfs-genkernel-${GENKERNEL_ARCH}-${version}" \
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+	   "initramfs-genkernel-${GENKERNEL_ARCH}-${alt_version}"; do
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+    if test -e "${dirname}/${i}" ; then
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+      initrd_real="${i}"
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+      break
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+    fi
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+  done
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+
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+  initrd=
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+  if test -n "${initrd_early}" || test -n "${initrd_real}"; then
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+    initrd="${initrd_early} ${initrd_real}"
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+
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+    initrd_display=
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+    for i in ${initrd}; do
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+      initrd_display="${initrd_display} ${dirname}/${i}"
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+    done
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+    if [ "x${GRUB_ENABLE_BLSCFG}" != "xtrue" ]; then
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+      gettext_printf "Found initrd image: %s\n" "$(echo $initrd_display)" >&2
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+    fi
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+  fi
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+
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+  fdt=
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+  for i in "dtb-${version}" "dtb-${alt_version}"; do
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+    if test -f "${dirname}/${i}/${GRUB_DEFAULT_DTB}" ; then
8631a2
+      fdt="${i}/${GRUB_DEFAULT_DTB}"
8631a2
+      break
8631a2
+    fi
8631a2
+  done
8631a2
+
8631a2
+  config=
8631a2
+  for i in "${dirname}/config-${version}" "${dirname}/config-${alt_version}" "/etc/kernels/kernel-config-${version}" ; do
8631a2
+    if test -e "${i}" ; then
8631a2
+      config="${i}"
8631a2
+      break
8631a2
+    fi
8631a2
+  done
8631a2
+
8631a2
+  initramfs=
8631a2
+  if test -n "${config}" ; then
8631a2
+      initramfs=`grep CONFIG_INITRAMFS_SOURCE= "${config}" | cut -f2 -d= | tr -d \"`
8631a2
+  fi
8631a2
+
8631a2
+  if test -z "${initramfs}" && test -z "${initrd_real}" ; then
8631a2
+    # "UUID=" and "ZFS=" magic is parsed by initrd or initramfs.  Since there's
8631a2
+    # no initrd or builtin initramfs, it can't work here.
8631a2
+    if [ "x${GRUB_DEVICE_PARTUUID}" = "x" ] \
8631a2
+	|| [ "x${GRUB_DISABLE_LINUX_PARTUUID}" = "xtrue" ]; then
8631a2
+
8631a2
+	linux_root_device_thisversion=${GRUB_DEVICE}
8631a2
+    else
8631a2
+	linux_root_device_thisversion=PARTUUID=${GRUB_DEVICE_PARTUUID}
8631a2
+    fi
8631a2
+  fi
8631a2
+
8631a2
+  if [ "x${GRUB_DISABLE_SUBMENU}" = "xyes" ] || [ "x${GRUB_DISABLE_SUBMENU}" = "xy" ]; then
8631a2
+    GRUB_DISABLE_SUBMENU="true"
8631a2
+  fi
8631a2
+
8631a2
+  if [ "x$is_top_level" = xtrue ] && [ "x${GRUB_DISABLE_SUBMENU}" != xtrue ]; then
8631a2
+    linux_entry "${OS}" "${version}" simple standard \
8631a2
+    "${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}"
8631a2
+    if [ "x$GRUB_LINUX_MAKE_DEBUG" = "xtrue" ]; then
8631a2
+      linux_entry "${OS}" "${version}" simple debug \
8631a2
+        "${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT} ${GRUB_CMDLINE_LINUX_DEBUG}"
8631a2
+    fi
8631a2
+
8631a2
+    submenu_indentation="$grub_tab"
8631a2
+
8631a2
+    if [ -z "$boot_device_id" ]; then
8631a2
+	boot_device_id="$(grub_get_device_id "${GRUB_DEVICE}")"
8631a2
+    fi
8631a2
+    # TRANSLATORS: %s is replaced with an OS name
8631a2
+    echo "submenu '$(gettext_printf "Advanced options for %s" "${OS}" | grub_quote)' \$menuentry_id_option 'gnulinux-advanced-$boot_device_id' {"
8631a2
+    is_top_level=false
8631a2
+  fi
8631a2
+
8631a2
+  linux_entry "${OS}" "${version}" advanced standard \
8631a2
+              "${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}"
8631a2
+  if [ "x$GRUB_LINUX_MAKE_DEBUG" = "xtrue" ]; then
8631a2
+    linux_entry "${OS}" "${version}" advanced debug \
8631a2
+                "${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT} ${GRUB_CMDLINE_LINUX_DEBUG}"
8631a2
+  fi
8631a2
+
8631a2
+  if [ "x${GRUB_DISABLE_RECOVERY}" != "xtrue" ]; then
8631a2
+    linux_entry "${OS}" "${version}" recovery standard \
8631a2
+                "single ${GRUB_CMDLINE_LINUX}"
8631a2
+  fi
8631a2
+
8631a2
+  list=`echo $list | tr ' ' '\n' | fgrep -vx "$linux" | tr '\n' ' '`
8631a2
+done
8631a2
+
8631a2
+# If at least one kernel was found, then we need to
8631a2
+# add a closing '}' for the submenu command.
8631a2
+if [ x"$is_top_level" != xtrue ]; then
8631a2
+  echo '}'
8631a2
+fi
8631a2
+
8631a2
+echo "$title_correction_code"