From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Peter Jones <pjones@redhat.com>

Date: Thu, 15 Mar 2018 14:12:40 -0400

Subject: [PATCH] Add grub2-switch-to-blscfg

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

---

 Makefile.util.def             |   7 ++

 .gitignore                    |   2 +

 util/grub-switch-to-blscfg.8  |  25 ++++

 util/grub-switch-to-blscfg.in | 262 ++++++++++++++++++++++++++++++++++++++++++

 4 files changed, 296 insertions(+)

 create mode 100644 util/grub-switch-to-blscfg.8

 create mode 100644 util/grub-switch-to-blscfg.in

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

index 879e8eb98a4..f4fbd250630 100644

--- a/Makefile.util.def

+++ b/Makefile.util.def

@@ -1348,6 +1348,13 @@ program = {

   ldadd = '$(LIBINTL) $(LIBDEVMAPPER) $(LIBZFS) $(LIBNVPAIR) $(LIBGEOM)';

 };

+script = {

+  name = grub-switch-to-blscfg;

+  common = util/grub-switch-to-blscfg.in;

+  mansection = 8;

+  installdir = sbin;

+};

+

 program = {

   name = grub-glue-efi;

   mansection = 1;

diff --git a/.gitignore b/.gitignore

index 54795fa60be..42475592123 100644

--- a/.gitignore

+++ b/.gitignore

@@ -121,6 +121,8 @@ grub-*.tar.*

 /grub*-sparc64-setup.8

 /grub*-syslinux2cfg

 /grub*-syslinux2cfg.1

+/grub*-switch-to-blscfg

+/grub*-switch-to-blscfg.8

 /grub_fstest.pp

 /grub_fstest_init.c

 /grub_fstest_init.lst

diff --git a/util/grub-switch-to-blscfg.8 b/util/grub-switch-to-blscfg.8

new file mode 100644

index 00000000000..134dfc62a7b

--- /dev/null

+++ b/util/grub-switch-to-blscfg.8

@@ -0,0 +1,25 @@

+.TH GRUB-SWITCH-TO-BLSCFG 1 "Wed Feb 26 2014"

+.SH NAME

+\fBgrub-switch-to-blscfg\fR \(em Switch to using BLS config files.

+

+.SH SYNOPSIS

+\fBgrub-switch-to-blscfg\fR [--grub-directory=\fIDIR\fR] [--config-file=\fIFILE\fR] [--grub-defaults=\fIFILE\fR]

+

+.SH DESCRIPTION

+\fBgrub-switch-to-blscfg\fR reconfigures grub-mkconfig to use BLS-style config files, and then regenerates the GRUB configuration.

+

+.SH OPTIONS

+.TP

+--grub-directory=\fIDIR\fR

+Search for grub.cfg under \fIDIR\fR.  The default value is \fI/boot/efi/EFI/\fBVENDOR\fR on UEFI machines and \fI/boot/grub2\fR elsewhere.

+

+.TP

+--config-file=\fIFILE\fR

+The grub config file to use.  The default value is \fI/etc/grub2-efi.cfg\fR on UEFI machines and \fI/etc/grub2.cfg\fR elsewhere.  Symbolic links will be followed.

+

+.TP

+--grub-defaults=\fIFILE\fR

+The defaults file for grub-mkconfig.  The default value is \fI/etc/default/grub\fR.

+

+.SH SEE ALSO

+.BR "info grub"

diff --git a/util/grub-switch-to-blscfg.in b/util/grub-switch-to-blscfg.in

new file mode 100644

index 00000000000..3ae5e4ea8d0

--- /dev/null

+++ b/util/grub-switch-to-blscfg.in

@@ -0,0 +1,262 @@

+#! /bin/sh

+#

+# Set a default boot entry for GRUB.

+# Copyright (C) 2004,2009  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/>.

+

+#set -eu

+

+# Initialize some variables.

+prefix=@prefix@

+exec_prefix=@exec_prefix@

+bindir=@bindir@

+sysconfdir="@sysconfdir@"

+PACKAGE_NAME=@PACKAGE_NAME@

+PACKAGE_VERSION=@PACKAGE_VERSION@

+datarootdir="@datarootdir@"

+datadir="@datadir@"

+if [ ! -v pkgdatadir ]; then

+    pkgdatadir="${datadir}/@PACKAGE@"

+fi

+

+self=`basename $0`

+

+grub_editenv=${bindir}/@grub_editenv@

+etcdefaultgrub=/etc/default/grub

+

+EFIDIR=$(grep ^ID= /etc/os-release | sed -e 's/^ID=//' -e 's/rhel/redhat/')

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

+    startlink=/etc/grub2-efi.cfg

+    grubdir=`echo "/@bootdirname@/efi/EFI/${EFIDIR}/" | sed 's,//*,/,g'`

+    blsdir=`echo "/@bootdirname@/efi/EFI/${EFIDIR}/loader/entries" | sed 's,//*,/,g'`

+else

+    startlink=/etc/grub2.cfg

+    grubdir=`echo "/@bootdirname@/@grubdirname@" | sed 's,//*,/,g'`

+    blsdir=`echo "/@bootdirname@" | sed 's,//*,/,g'`

+fi

+

+backupsuffix=.bak

+

+export TEXTDOMAIN=@PACKAGE@

+export TEXTDOMAINDIR="@localedir@"

+

+. "${pkgdatadir}/grub-mkconfig_lib"

+

+# Usage: usage

+# Print the usage.

+usage () {

+    gettext_printf "Usage: %s\n" "$self"

+    gettext "Switch to BLS config files.\n"; echo

+    echo

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

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

+    echo

+    print_option_help "--backup-suffix=$(gettext "SUFFIX")" "$backupsuffix"

+    print_option_help "--bls-directory=$(gettext "DIR")" "$blsdir"

+    print_option_help "--config-file=$(gettext "FILE")" "$startlink"

+    print_option_help "--grub-defaults=$(gettext "FILE")" "$etcdefaultgrub"

+    print_option_help "--grub-directory=$(gettext "DIR")" "$grubdir"

+    # echo

+    # gettext "Report bugs to <bug-grub@gnu.org>."; echo

+}

+

+argument () {

+    opt=$1

+    shift

+

+    if test $# -eq 0; then

+        gettext_printf "%s: option requires an argument -- \`%s'\n" "$self" "$opt" 1>&2

+        exit 1

+    fi

+    echo $1

+}

+

+# Check the arguments.

+while test $# -gt 0

+do

+    option=$1

+    shift

+

+    case "$option" in

+    -h | --help)

+        usage

+        exit 0 ;;

+    -V | --version)

+        echo "$self (${PACKAGE_NAME}) ${PACKAGE_VERSION}"

+        exit 0 ;;

+

+    --backup-suffix)

+        backupsuffix=`argument $option "$@"`

+        shift

+        ;;

+    --backup-suffix=*)

+        backupsuffix=`echo "$option" | sed 's/--backup-suffix=//'`

+        ;;

+

+    --bls-directory)

+        blsdir=`argument $option "$@"`

+        shift

+        ;;

+    --bls-directory=*)

+        blsdir=`echo "$option" | sed 's/--bls-directory=//'`

+        ;;

+

+    --config-file)

+        startlink=`argument $option "$@"`

+        shift

+        ;;

+    --config-file=*)

+        startlink=`echo "$option" | sed 's/--config-file=//'`

+        ;;

+

+    --grub-defaults)

+        etcdefaultgrub=`argument $option "$@"`

+        shift

+        ;;

+    --grub-defaults=*)

+        etcdefaultgrub=`echo "$option" | sed 's/--grub-defaults=//'`

+        ;;

+

+    --grub-directory)

+        grubdir=`argument $option "$@"`

+        shift

+        ;;

+    --grub-directory=*)

+        grubdir=`echo "$option" | sed 's/--grub-directory=//'`

+        ;;

+

+    *)

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

+        usage

+        exit 1

+        ;;

+    esac

+done

+

+find_grub_cfg() {

+    local candidate=""

+    while [[ -e "${candidate}" || $# -gt 0 ]]

+    do

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

+            candidate="$1"

+            shift

+        fi

+

+        if [[ -L "${candidate}" ]]; then

+            candidate="$(realpath "${candidate}")"

+        fi

+

+        if [[ -f "${candidate}" ]]; then

+            export GRUB_CONFIG_FILE="${candidate}"

+            return 0

+        fi

+    done

+    return 1

+}

+

+if ! find_grub_cfg ${startlink} ${grubdir}/grub.cfg ; then

+  gettext_printf "Couldn't find config file\n" 1>&2

+  exit 1

+fi

+

+if [[ ! -d "${blsdir}" ]]; then

+    install -m 700 -d "${blsdir}"

+fi

+

+if [[ -f /etc/machine-id ]]; then

+    MACHINE_ID=$(cat /etc/machine-id)

+else

+    MACHINE_ID=$(dmesg | sha256sum)

+fi

+

+mkbls() {

+    local kernelver=$1 && shift

+    local datetime=$1 && shift

+

+    local debugname=""

+    local flavor=""

+

+    if [[ "$kernelver" == *\+* ]] ; then

+        local flavor=-"${kernelver##*+}"

+        if [[ "${flavor}" == "-debug" ]]; then

+            local debugname=" with debugging"

+        fi

+    fi

+    (

+        source /etc/os-release

+

+        cat <

+title ${NAME} (${kernelver}) ${VERSION}${debugname}

+linux /vmlinuz-${kernelver}

+initrd /initramfs-${kernelver}.img

+options \$kernelopts

+id ${ID}-${datetime}-${kernelver}

+grub_users \$grub_users

+grub_arg --unrestricted

+grub_class kernel${flavor}

+EOF

+    ) | cat

+}

+

+for kernelver in $(cd /lib/modules/ ; ls -1) "" ; do

+    if [[ ! -d "/lib/modules/${kernelver}" ]] ; then

+        continue

+    fi

+    if [[ ! -f "/boot/vmlinuz-${kernelver}" ]]; then

+        continue

+    fi

+    bls_target="${blsdir}/${MACHINE_ID}-${kernelver}.conf"

+    kernel_dir="/lib/modules/${kernelver}"

+    if [[ -f "${kernel_dir}/bls.conf" ]]; then

+        cp -af "${kernel_dir}/bls.conf" "${bls_target}"

+    else

+        mkbls "${kernelver}" \

+            "$(date -u +%Y%m%d%H%M%S -d "$(stat -c '%y' "${kernel_dir}")")" \

+            >"${bls_target}"

+    fi

+done

+

+GENERATE=0

+if grep '^GRUB_ENABLE_BLSCFG=.*' "${etcdefaultgrub}" \

+        | grep -vq '^GRUB_ENABLE_BLSCFG="*true"*\s*$' ; then

+    if ! sed -i"${backupsuffix}" \

+            -e 's,^GRUB_ENABLE_BLSCFG=.*,GRUB_ENABLE_BLSCFG=true,' \

+            "${etcdefaultgrub}" ; then

+        gettext_printf "Updating %s failed\n" "${etcdefaultgrub}"

+        exit 1

+    fi

+    GENERATE=1

+elif ! grep -q '^GRUB_ENABLE_BLSCFG=.*' "${etcdefaultgrub}" ; then

+    if ! echo 'GRUB_ENABLE_BLSCFG=true' >> "${etcdefaultgrub}" ; then

+        gettext_printf "Updating %s failed\n" "${etcdefaultgrub}"

+        exit 1

+    fi

+    GENERATE=1

+fi

+

+if [[ "${GENERATE}" -eq 1 ]] ; then

+    cp -af "${GRUB_CONFIG_FILE}" "${GRUB_CONFIG_FILE}${backupsuffix}"

+    if ! grub2-mkconfig -o "${GRUB_CONFIG_FILE}" ; then

+        cp -af "${GRUB_CONFIG_FILE}${backupsuffix}" "${GRUB_CONFIG_FILE}"

+        sed -i"${backupsuffix}" \

+            -e 's,^GRUB_ENABLE_BLSCFG=.*,GRUB_ENABLE_BLSCFG=false,' \

+            /etc/default/grub

+        gettext_printf "Updating %s failed\n" "${GRUB_CONFIG_FILE}"

+        exit 1

+    fi

+fi

+

+# Bye.

+exit 0