<h2>Edit File: grubby-bls</h2><form method="post"><textarea name="content" rows="20" cols="80">#!/usr/bin/bash
#
# grubby wrapper to manage BootLoaderSpec files
#
#
# Copyright 2018 Red Hat, Inc.  All rights reserved.
#
# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program.  If not, see &lt;http://www.gnu.org/licenses/&gt;.

readonly SCRIPTNAME=&quot;${0##*/}&quot;

CMDLINE_LINUX_DEBUG=&quot; systemd.log_level=debug systemd.log_target=kmsg&quot;
LINUX_DEBUG_VERSION_POSTFIX=&quot;_with_debugging&quot;
LINUX_DEBUG_TITLE_POSTFIX=&quot; with debugging&quot;

declare -a bls_file
declare -a bls_title
declare -a bls_version
declare -a bls_linux
declare -a bls_initrd
declare -a bls_options
declare -a bls_id

[[ -f /etc/sysconfig/kernel ]] &amp;&amp; . /etc/sysconfig/kernel
[[ -f /etc/os-release ]] &amp;&amp; . /etc/os-release
read MACHINE_ID &lt; /etc/machine-id
arch=$(uname -m)

if [[ $arch = &#039;s390&#039; || $arch = &#039;s390x&#039; ]]; then
    bootloader=&quot;zipl&quot;
else
    bootloader=&quot;grub2&quot;
fi

print_error() {
    echo &quot;$1&quot; &gt;&amp;2
    exit 1
}

print_info() {
    echo &quot;$1&quot; &gt;&amp;2
}

if [[ ${#} = 0 ]]; then
    print_error &quot;no action specified&quot;
fi

get_bls_value() {
    local bls=&quot;$1&quot; &amp;&amp; shift
    local key=&quot;$1&quot; &amp;&amp; shift

    echo &quot;$(grep &quot;^${key}[ \t]&quot; &quot;${bls}&quot; | sed -e &quot;s!^${key}[ \t]*!!&quot;)&quot;
}

set_bls_value() {
    local bls=&quot;$1&quot; &amp;&amp; shift
    local key=&quot;$1&quot; &amp;&amp; shift
    local value=&quot;$1&quot; &amp;&amp; shift

    value=$(echo $value | sed -e &#039;s/\//\\\//g&#039;)
    sed -i -e &quot;s/^${key}.*/${key} ${value}/&quot; &quot;${bls}&quot;
}

append_bls_value() {
    local bls=&quot;$1&quot; &amp;&amp; shift
    local key=&quot;$1&quot; &amp;&amp; shift
    local value=&quot;$1&quot; &amp;&amp; shift

    old_value=&quot;$(get_bls_value &quot;${bls}&quot; ${key})&quot;
    set_bls_value &quot;${bls}&quot; &quot;${key}&quot; &quot;${old_value}${value}&quot;
}

get_bls_values() {
    count=0
    local -a files
    local IFS=$&#039;\n&#039;
    files=($(for bls in ${blsdir}/*.conf ; do
        if ! [[ -e &quot;${bls}&quot; ]] ; then
            continue
        fi
        bls=&quot;${bls%.conf}&quot;
        bls=&quot;${bls##*/}&quot;
        echo &quot;${bls}&quot;
    done | /usr/libexec/grubby/rpm-sort -c rpmnvrcmp 2&gt;/dev/null | tac)) || :

    for bls in &quot;${files[@]}&quot; ; do
        blspath=&quot;${blsdir}/${bls}.conf&quot;
        bls_file[$count]=&quot;${blspath}&quot;
        bls_title[$count]=&quot;$(get_bls_value ${blspath} title)&quot;
        bls_version[$count]=&quot;$(get_bls_value ${blspath} version)&quot;
        bls_linux[$count]=&quot;$(get_bls_value ${blspath} linux)&quot;
        bls_initrd[$count]=&quot;$(get_bls_value ${blspath} initrd)&quot;
        bls_options[$count]=&quot;$(get_bls_value ${blspath} options)&quot;
        bls_id[$count]=&quot;${bls}&quot;

        count=$((count+1))
    done
}

get_default_index() {
    local default=&quot;&quot;
    local index=&quot;-1&quot;
    local title=&quot;&quot;
    local version=&quot;&quot;
    if [[ $bootloader = &quot;grub2&quot; ]]; then
	default=&quot;$(grep &#039;^saved_entry=&#039; ${env} | sed -e &#039;s/^saved_entry=//&#039;)&quot;
    else
	default=&quot;$(grep &#039;^default=&#039; ${zipl_config} | sed -e &#039;s/^default=//&#039;)&quot;
    fi

    if [[ -z $default ]]; then
	index=0
    elif [[ $default =~ ^[0-9]+$ ]]; then
	index=&quot;$default&quot;
    fi

    for i in ${!bls_file[@]}; do
        if [[ $i -eq $index ]]; then
            echo $i
            return
        fi

        if [[ $default = ${bls_id[$i]} || $default = ${bls_title[$i]} ]]; then
            echo $i
            return
        fi
    done
}

display_default_value() {
    local prefix=$(get_prefix)

    case &quot;$display_default&quot; in
        kernel)
            echo &quot;${prefix}${bls_linux[$default_index]}&quot;
            exit 0
            ;;
        index)
            echo &quot;$default_index&quot;
            exit 0
            ;;
        title)
            echo &quot;${bls_title[$default_index]}&quot;
            exit 0
            ;;
    esac
}

param_to_indexes() {
    local param=&quot;$1&quot;
    local indexes=&quot;&quot;

    if [[ $param = &quot;ALL&quot; ]]; then
        for i in ${!bls_file[@]}; do
            indexes=&quot;$indexes $i&quot;
        done
        echo -n $indexes
        return
    fi

    if [[ $param = &quot;DEFAULT&quot; ]]; then
        echo -n $default_index
        return
    fi

    for i in ${!bls_file[@]}; do
        if [[ $param = &quot;${bls_linux[$i]}&quot; || &quot;/${param##*/}&quot; = &quot;${bls_linux[$i]}&quot; ]]; then
            indexes=&quot;$indexes $i&quot;
        fi

        if [[ $param = &quot;TITLE=${bls_title[$i]}&quot; ]]; then
            indexes=&quot;$indexes $i&quot;
        fi

	if [[ $param = $i ]]; then
	    indexes=&quot;$indexes $i&quot;
	fi
    done

    if [[ -n $indexes ]]; then
        echo -n $indexes
        return
    fi

    echo -n &quot;-1&quot;
}

get_prefix() {
    if [[ $bootloader = grub2 ]] &amp;&amp; mountpoint -q /boot; then
	echo &quot;/boot&quot;
    else
	echo &quot;&quot;
    fi
}

expand_var() {
    local var=$1

    if [[ $bootloader == &quot;grub2&quot; ]]; then
        local value=&quot;$(grub2-editenv &quot;${env}&quot; list | grep ${var##$} | sed -e &quot;s/${var##$}=//&quot;)&quot;
        value=&quot;$(echo ${value} | sed -e &#039;s/\//\\\//g&#039;)&quot;
        if [[ -n $value ]]; then
            var=&quot;$value&quot;
        fi
    fi

    echo $var
}

has_kernelopts()
{
    local args=${bls_options[$1]}
    local opts=(${args})

    for opt in ${opts[*]}; do
        [[ $opt = &quot;\$kernelopts&quot; ]] &amp;&amp; echo &quot;true&quot;
    done

    echo &quot;false&quot;
}

get_bls_args() {
    local args=${bls_options[$1]}
    local opts=(${args})

    for opt in ${opts[*]}; do
        if [[ $opt = &quot;\$kernelopts&quot; ]]; then
            value=&quot;$(expand_var $opt)&quot;
            args=&quot;$(echo ${args} | sed -e &quot;s/${opt}/${value}/&quot;)&quot;
        fi
    done

    echo ${args}
}

display_info_values() {
    local indexes=($(param_to_indexes &quot;$1&quot;))
    local prefix=$(get_prefix)

    if [[ $indexes = &quot;-1&quot; ]]; then
        print_error &quot;The param $1 is incorrect&quot;
    fi

    for i in ${indexes[*]}; do
        local root=&quot;&quot;
        local value=&quot;&quot;
        local args=&quot;$(get_bls_args &quot;$i&quot;)&quot;

        local opts=(${args})

        for opt in ${opts[*]}; do
            if echo $opt | grep -q &quot;^root=&quot;; then
                root=&quot;$(echo $opt | sed -e &#039;s/root=//&#039;)&quot;
                value=&quot;$(echo ${opt} | sed -e &#039;s/\//\\\//g&#039;)&quot;
                args=&quot;$(echo ${args} | sed -e &quot;s/${value}[ \t]*//&quot;)&quot;
                break
            fi
        done

        echo &quot;index=$i&quot;
        echo &quot;kernel=\&quot;${prefix}${bls_linux[$i]}\&quot;&quot;
        echo &quot;args=\&quot;${args}\&quot;&quot;

        if [[ -n $root ]]; then
            echo &quot;root=\&quot;${root}\&quot;&quot;
        fi

        echo &quot;initrd=\&quot;${prefix}${bls_initrd[$i]}\&quot;&quot;
        echo &quot;title=\&quot;${bls_title[$i]}\&quot;&quot;
        echo &quot;id=\&quot;${bls_id[$i]}\&quot;&quot;
    done
    exit 0
}

mkbls() {
    local kernel=$1 &amp;&amp; shift
    local kernelver=$1 &amp;&amp; shift
    local datetime=$1 &amp;&amp; shift

    local debugname=&quot;&quot;
    local flavor=&quot;&quot;
    local prefix=&quot;&quot;

    if [[ $(get_prefix) = &quot;&quot; ]]; then
	prefix=&quot;/boot&quot;
    fi

    if [[ $kernelver == *\+* ]] ; then
        local flavor=-&quot;${kernelver##*+}&quot;
        if [[ $flavor == &quot;-debug&quot; ]]; then
            local debugname=&quot;with debugging&quot;
	    local debugid=&quot;-debug&quot;
        fi
    fi

    cat &lt;&lt;EOF
title ${NAME} (${kernelver}) ${VERSION}${debugname}
version ${kernelver}${debugid}
linux ${kernel}
initrd ${prefix}/initramfs-${kernelver}.img
options \$kernelopts
id ${ID}-${datetime}-${kernelver}${debugid}
grub_users \$grub_users
grub_arg --unrestricted
grub_class kernel${flavor}
EOF
}

unset_default_bls()
{
    if [[ $bootloader = grub2 ]]; then
        grub2-editenv &quot;${env}&quot; unset saved_entry
    else
        sed -i -e &quot;/^default=.*/d&quot; &quot;${zipl_config}&quot;
    fi
}

remove_bls_fragment() {
    local indexes=($(param_to_indexes &quot;$1&quot;))

    if [[ $indexes = &quot;-1&quot; ]]; then
	print_error &quot;The param $(get_prefix)$1 is incorrect&quot;
    fi

    for i in &quot;${indexes[@]}&quot;; do
        if [[ $default_index = $i ]]; then
            unset_default_bls
        fi
        rm -f &quot;${bls_file[$i]}&quot;
    done

    get_bls_values

    update_grubcfg
}

get_custom_bls_filename() {
    local kernelver=$1
    local bls_target=&quot;${blsdir}/${MACHINE_ID}-${kernelver}.conf&quot;
    count=0
    local -a files
    local IFS=$&#039;\n&#039;

    prefix=&quot;${bls_target%%.conf}&quot;
    prefix=&quot;${bls_target%%${arch}}&quot;
    prefix=&quot;${prefix%.*}&quot;

    last=($(for bls in ${prefix}.*~custom*.conf ; do
        if ! [[ -e &quot;${bls}&quot; ]] ; then
            continue
        fi
        bls=&quot;${bls##${prefix}.}&quot;
        bls=&quot;${bls%%~custom*}&quot;
        echo &quot;${bls}&quot;
    done | tail -n1)) || :

    if [[ -z $last ]]; then
        last=&quot;0&quot;
    else
        last=$((last+1))
    fi

    echo &quot;${bls_target}&quot; | sed -e &quot;s!${prefix}!${prefix}.${last}~custom!&quot;
}

add_bls_fragment() {
    local kernel=&quot;$1&quot; &amp;&amp; shift
    local title=&quot;$1&quot; &amp;&amp; shift
    local options=&quot;$1&quot; &amp;&amp; shift
    local initrd=&quot;$1&quot; &amp;&amp; shift
    local extra_initrd=&quot;$1&quot; &amp;&amp; shift

    if [[ $kernel = *&quot;vmlinuz-&quot;* ]]; then
	kernelver=&quot;${kernel##*/vmlinuz-}&quot;
	prefix=&quot;vmlinuz-&quot;
    else
	kernelver=&quot;${kernel##*/}&quot;
    fi

    if [[ ! -f &quot;/boot/${prefix}${kernelver}&quot; ]] &amp;&amp;
       [[ $bad_image != &quot;true&quot; ]]; then
        print_error &quot;The ${kernelver} kernel isn&#039;t installed in the machine&quot;
    fi

    if [[ -z $title ]]; then
	print_error &quot;The kernel title must be specified&quot;
    fi

    if [[ ! -d $blsdir ]]; then
        install -m 700 -d &quot;${blsdir}&quot;
    fi

    bls_target=&quot;${blsdir}/${MACHINE_ID}-${kernelver}.conf&quot;

    if [[ -e ${bls_target} ]]; then
        bls_target=&quot;$(get_custom_bls_filename &quot;${kernelver}&quot;)&quot;
        print_info &quot;An entry for kernel ${kernelver} already exists, adding ${bls_target}&quot;
    fi

    kernel_dir=&quot;/lib/modules/${kernelver}&quot;
    if [[ -d $kernel_dir ]]; then
        datetime=&quot;$(date -u +%Y%m%d%H%M%S -d &quot;$(stat -c &#039;%y&#039; &quot;${kernel_dir}&quot;)&quot;)&quot;
    else
        datetime=0
    fi
    mkbls &quot;${kernel}&quot; &quot;${kernelver}&quot; &quot;${datetime}&quot; &gt; &quot;${bls_target}&quot;

    if [[ -n $title ]]; then
        set_bls_value &quot;${bls_target}&quot; &quot;title&quot; &quot;${title}&quot;
    fi

    if [[ -n $options ]]; then
        set_bls_value &quot;${bls_target}&quot; &quot;options&quot; &quot;${options}&quot;
    fi

    if [[ -n $initrd ]]; then
        set_bls_value &quot;${bls_target}&quot; &quot;initrd&quot; &quot;${initrd}&quot;
    fi

    if [[ -n $extra_initrd ]]; then
        append_bls_value &quot;${bls_target}&quot; &quot;initrd&quot; &quot; ${extra_initrd}&quot;
    fi

    if [[ $MAKEDEBUG = &quot;yes&quot; ]]; then
        bls_debug=&quot;$(echo ${bls_target} | sed -e &quot;s/${kernelver}/${kernelver}~debug/&quot;)&quot;
        cp -aT  &quot;${bls_target}&quot; &quot;${bls_debug}&quot;
        append_bls_value &quot;${bls_debug}&quot; &quot;title&quot; &quot;${LINUX_DEBUG_TITLE_POSTFIX}&quot;
        append_bls_value &quot;${bls_debug}&quot; &quot;version&quot; &quot;${LINUX_DEBUG_VERSION_POSTFIX}&quot;
        append_bls_value &quot;${bls_debug}&quot; &quot;options&quot; &quot;${CMDLINE_LINUX_DEBUG}&quot;
        blsid=&quot;$(get_bls_value ${bls_debug} &quot;id&quot; | sed -e &quot;s/${kernelver}/${kernelver}~debug/&quot;)&quot;
        set_bls_value &quot;${bls_debug}&quot; &quot;id&quot; &quot;${blsid}&quot;
    fi

    get_bls_values

    if [[ $make_default = &quot;true&quot; ]]; then
        set_default_bls &quot;TITLE=${title}&quot;
    fi

    update_grubcfg

    exit 0
}

update_args() {
    local args=$1 &amp;&amp; shift
    local remove_args=($1) &amp;&amp; shift
    local add_args=($1) &amp;&amp; shift

    for arg in ${remove_args[*]}; do
        arg=&quot;$(echo $arg | sed -e &#039;s/\//\\\//g&#039;)&quot;
        if [[ $arg = *&quot;=&quot;* ]]; then
            args=&quot;$(echo $args | sed -E &quot;s/(^|[[:space:]])$arg([[:space:]]|$)/ /&quot;)&quot;
        else
            args=&quot;$(echo $args | sed -E &quot;s/(^|[[:space:]])$arg(([[:space:]]|$)|([=][^ ]*([$]*)))/ /g&quot;)&quot;
        fi
    done

    for arg in ${add_args[*]}; do
        arg=&quot;${arg%%=*}&quot;
        arg=&quot;$(echo $arg | sed -e &#039;s/\//\\\//g&#039;)&quot;
        args=&quot;$(echo $args | sed -E &quot;s/(^|[[:space:]])$arg(([[:space:]]|$)|([=][^ ]*([$]*)))/ /g&quot;)&quot;
    done

    for arg in ${add_args[*]}; do
        args=&quot;$args $arg&quot;
    done

    echo ${args}
}

update_bls_fragment() {
    local param=&quot;$1&quot;
    local indexes=($(param_to_indexes &quot;$1&quot;)) &amp;&amp; shift
    local remove_args=$1 &amp;&amp; shift
    local add_args=$1 &amp;&amp; shift
    local initrd=$1 &amp;&amp; shift
    local opts

    if [[ $indexes = &quot;-1&quot; ]]; then
        print_error &quot;The param $(get_prefix)${param} is incorrect&quot;
    fi

    if [[ $param = &quot;ALL&quot; &amp;&amp; $bootloader = grub2 ]] &amp;&amp; [[ -n $remove_args || -n $add_args ]]; then
        local old_args=&quot;&quot;

        if [[ -z $no_etc_update ]] &amp;&amp; [[ -e ${grub_etc_default} ]]; then
            old_args=&quot;$(source ${grub_etc_default}; echo ${GRUB_CMDLINE_LINUX})&quot;
            if [[ -n $old_args ]]; then
                opts=&quot;$(update_args &quot;${old_args}&quot; &quot;${remove_args}&quot; &quot;${add_args}&quot;)&quot;
                opts=&quot;$(echo &quot;$opts&quot; | sed -e &#039;s/\//\\\//g&#039;)&quot;
                sed -i -e &quot;s/^GRUB_CMDLINE_LINUX=.*/GRUB_CMDLINE_LINUX=\\\&quot;${opts}\\\&quot;/&quot; &quot;${grub_etc_default}&quot;
            fi
        fi

        old_args=&quot;$(grub2-editenv &quot;${env}&quot; list | grep kernelopts | sed -e &quot;s/kernelopts=//&quot;)&quot;
        if [[ -n $old_args ]]; then
            opts=&quot;$(update_args &quot;${old_args}&quot; &quot;${remove_args}&quot; &quot;${add_args}&quot;)&quot;
            grub2-editenv &quot;${env}&quot; set kernelopts=&quot;${opts}&quot;
        fi
    elif [[ $bootloader = grub2 ]]; then
        opts=&quot;$(grub2-editenv &quot;${env}&quot; list | grep kernelopts | sed -e &quot;s/kernelopts=//&quot;)&quot;
    fi

    for i in ${indexes[*]}; do
	if [[ -n $remove_args || -n $add_args ]]; then
            local old_args=&quot;$(get_bls_args &quot;$i&quot;)&quot;
            local new_args=&quot;$(update_args &quot;${old_args}&quot; &quot;${remove_args}&quot; &quot;${add_args}&quot;)&quot;

            if [[ $param != &quot;ALL&quot; || &quot;$(has_kernelopts &quot;$i&quot;)&quot; = &quot;false&quot; ]]; then
                set_bls_value &quot;${bls_file[$i]}&quot; &quot;options&quot; &quot;${new_args}&quot;
            fi
	fi

	if [[ -n $initrd ]]; then
	    set_bls_value &quot;${bls_file[$i]}&quot; &quot;initrd&quot; &quot;${initrd}&quot;
	fi
    done

    if [[ $param = &quot;ALL&quot; ]] &amp;&amp; [[ -n $remove_args || -n $add_args ]]; then
	if [[ ! -f /etc/kernel/cmdline ]]; then
	    # anaconda could pre-populate this file, but until then, most of
	    # the time we&#039;ll just want the most recent one.  This is pretty
	    # close to the current almost-correct behavior of falling back to
	    # /proc/cmdline anyhow.
	    echo &quot;$(get_bls_args -1)&quot; &gt; /etc/kernel/cmdline
	fi

	read old_args &lt; /etc/kernel/cmdline
	local new_args=&quot;$(update_args &quot;${old_args}&quot; &quot;${remove_args}&quot; &quot;${add_args}&quot;)&quot;
	echo &quot;$new_args&quot; &gt; /etc/kernel/cmdline
    fi

    update_grubcfg
}

set_default_bls() {
    local index=($(param_to_indexes &quot;$1&quot;))

    if [[ $index = &quot;-1&quot; ]]; then
        print_error &quot;The param $1 is incorrect&quot;
    fi

    if [[ $bootloader = grub2 ]]; then
        grub2-editenv &quot;${env}&quot; set saved_entry=&quot;${bls_id[$index]}&quot;
    else
        local default=&quot;${bls_title[$index]}&quot;
        local current=&quot;$(grep &#039;^default=&#039; ${zipl_config} | sed -e &#039;s/^default=//&#039;)&quot;
        if [[ -n $current ]]; then
            sed -i -e &quot;s,^default=.*,default=${default},&quot; &quot;${zipl_config}&quot;
        else
            echo &quot;default=${default}&quot; &gt;&gt; &quot;${zipl_config}&quot;
        fi
    fi
    update_grubcfg
    print_info &quot;The default is ${bls_file[$index]} with index $index and kernel $(get_prefix)${bls_linux[$index]}&quot;
}

remove_var_prefix() {
    local prefix=&quot;$1&quot;

    [ -z &quot;${prefix}&quot; ] &amp;&amp; return

    if [[ -n $remove_kernel &amp;&amp; $remove_kernel =~ ^/ ]]; then
       remove_kernel=&quot;/${remove_kernel##${prefix}/}&quot;
    fi

    if [[ -n $initrd ]]; then
	initrd=&quot;/${initrd##${prefix}/}&quot;
    fi

    if [[ -n $extra_initrd ]]; then
	extra_initrd=&quot;/${extra_initrd##${prefix}/}&quot;
    fi

    if [[ -n $kernel ]]; then
	kernel=&quot;/${kernel##${prefix}/}&quot;
    fi

    if [[ -n $update_kernel &amp;&amp; $update_kernel =~ ^/ ]]; then
	update_kernel=&quot;/${update_kernel##${prefix}/}&quot;
    fi
}

update_grubcfg()
{
    # Turn on RUN_MKCONFIG on different archs/scenarios
    if [[ &quot;${arch}&quot; = &#039;s390&#039; ]] || [[ &quot;${arch}&quot; = &#039;s390x&#039; ]]; then
        # On s390/s390x systems, run mkconfig/zipl
        RUN_MKCONFIG=&quot;true&quot;
    elif [[ &quot;${arch}&quot; = &quot;ppc64le&quot; ]] &amp;&amp; [[ -d /sys/firmware/opal ]]; then
        # Older ppc64le OPAL firmware don&#039;t have BLS support so grub2-mkconfig has to be run
        # to generate a config with menuentry commands.
        RUN_MKCONFIG=&quot;true&quot;
    elif [[ -e /sys/hypervisor/type ]] &amp;&amp; grep -q &quot;^xen$&quot; /sys/hypervisor/type; then
        if [ ! -e /sys/hypervisor/guest_type ] || ! grep -q &quot;^HVM$&quot; /sys/hypervisor/guest_type; then
            # PV and PVH Xen DomU guests boot with pygrub that doesn&#039;t have BLS support,
            # also Xen Dom0 use the menuentries from 20_linux_xen and not the ones from
            # 10_linux. So grub2-mkconfig has to run for both Xen Dom0 and DomU.
            RUN_MKCONFIG=true
        fi
    fi

    if [[ $RUN_MKCONFIG = &quot;true&quot; ]]; then
        if [[ $bootloader = &quot;zipl&quot; ]]; then
            zipl
        else
            grub2-mkconfig --no-grubenv-update -o &quot;${grub_config}&quot; &amp;&gt; /dev/null
        fi
    fi
}

print_usage()
{
    cat &lt;&lt;EOF
Usage: grubby [OPTION...]
      --add-kernel=kernel-path            add an entry for the specified kernel
      --args=args                         default arguments for the new kernel or new arguments for kernel being updated)
      --bad-image-okay                    don&#039;t sanity check images in boot entries (for testing only)
  -c, --config-file=path                  path to grub config file to update (&quot;-&quot; for stdin)
      --copy-default                      use the default boot entry as a template for the new entry being added; if the default is not a linux image, or if the kernel referenced by the default image does not exist, the
                                          first linux entry whose kernel does exist is used as the template
      --default-kernel                    display the path of the default kernel
      --default-index                     display the index of the default kernel
      --default-title                     display the title of the default kernel
      --env=path                          path for environment data
      --grub2                             configure grub2 bootloader
      --info=kernel-path                  display boot information for specified kernel
      --initrd=initrd-path                initrd image for the new kernel
  -i, --extra-initrd=initrd-path          auxiliary initrd image for things other than the new kernel
      --make-default                      make the newly added entry the default boot entry
      --remove-args=STRING                remove kernel arguments
      --remove-kernel=kernel-path         remove all entries for the specified kernel
      --set-default=kernel-path           make the first entry referencing the specified kernel the default
      --set-default-index=entry-index     make the given entry index the default entry
      --title=entry-title                 title to use for the new kernel entry
      --update-kernel=kernel-path         updated information for the specified kernel
      --zipl                              configure zipl bootloader
  -b, --bls-directory                     path to directory containing the BootLoaderSpec fragment files
      --no-etc-grub-update                don&#039;t update the GRUB_CMDLINE_LINUX variable in /etc/default/grub

Help options:
  -h, --help                              Show this help message

EOF
}

OPTS=&quot;$(getopt -o hc:i:b:? --long help,add-kernel:,args:,bad-image-okay,\
config-file:,copy-default,default-kernel,default-index,default-title,env:,\
grub2,info:,initrd:,extra-initrd:,make-default,remove-args:,\
remove-kernel:,set-default:,set-default-index:,title:,update-kernel:,zipl,\
bls-directory:,no-etc-grub-update,add-multiboot:,mbargs:,mounts:,boot-filesystem:,\
bootloader-probe,debug,devtree,devtreedir:,elilo,efi,extlinux,grub,lilo,\
output-file:,remove-mbargs:,remove-multiboot:,silo,yaboot -n ${SCRIPTNAME} -- &quot;$@&quot;)&quot;

[[ $? = 0 ]] || exit 1

eval set -- &quot;$OPTS&quot;

while [ ${#} -gt 0 ]; do
    case &quot;$1&quot; in
        --help|-h)
            print_usage
            exit 0
            ;;
        --add-kernel)
            kernel=&quot;${2}&quot;
            shift
            ;;
        --args)
            args=&quot;${2}&quot;
            shift
            ;;
        --bad-image-okay)
            bad_image=true
            ;;
        --config-file|-c)
            grub_config=&quot;${2}&quot;
            zipl_config=&quot;${2}&quot;
            shift
            ;;
        --copy-default)
            copy_default=true
            ;;
        --default-kernel)
            display_default=&quot;kernel&quot;
            ;;
        --default-index)
            display_default=&quot;index&quot;
            ;;
        --default-title)
            display_default=&quot;title&quot;
            ;;
        --env)
            env=&quot;${2}&quot;
            shift
            ;;
        --grub2)
            bootloader=&quot;grub2&quot;
            ;;
        --info)
            display_info=&quot;${2}&quot;
            shift
            ;;
        --initrd)
            initrd=&quot;${2}&quot;
            shift
            ;;
        --extra-initrd|-i)
            extra_initrd=&quot;${2}&quot;
            shift
            ;;
        --make-default)
            make_default=true
            ;;
        --remove-args)
            remove_args=&quot;${2}&quot;
            shift
            ;;
        --remove-kernel)
            remove_kernel=&quot;${2}&quot;
            shift
            ;;
        --set-default)
            set_default=&quot;${2}&quot;
            shift
            ;;
        --set-default-index)
            set_default=&quot;${2}&quot;
            shift
            ;;
        --title)
            title=&quot;${2}&quot;
            shift
            ;;
        --update-kernel)
            update_kernel=&quot;${2}&quot;
            shift
            ;;
        --zipl)
            bootloader=&quot;zipl&quot;
            ;;
        --bls-directory|-b)
            blsdir=&quot;${2}&quot;
	    shift
	    ;;
        --no-etc-grub-update)
            no_etc_update=true
            shift
            ;;
        --add-multiboot|--mbargs|--mounts|--boot-filesystem|\
        --bootloader-probe|--debug|--devtree|--devtreedir|--elilo|--efi|\
        --extlinux|--grub|--lilo|--output-file|--remove-mbargs|--silo|\
        --remove-multiboot|--slilo|--yaboot)
            echo
            echo &quot;${SCRIPTNAME}: the option \&quot;${1}\&quot; was deprecated&quot; &gt;&amp;2
            echo &quot;Try &#039;${SCRIPTNAME} --help&#039; to list supported options&quot; &gt;&amp;2
            echo
	    exit 1
	    ;;
        --)
            shift
            break
            ;;
        *)
            echo
            echo &quot;${SCRIPTNAME}: invalid option \&quot;${1}\&quot;&quot; &gt;&amp;2
            echo &quot;Try &#039;${SCRIPTNAME} --help&#039; for more information&quot; &gt;&amp;2
            echo
            exit 1
            ;;
    esac
    shift
done

if [[ -z $update_kernel &amp;&amp; -z $kernel ]] &amp;&amp; [[ -n $args || -n $remove_args ]]; then
    print_error &quot;no action specified&quot;
fi

if [[ -z $blsdir ]]; then
    blsdir=&quot;/boot/loader/entries&quot;
fi

if [[ -z $env ]]; then
    env=&quot;/boot/grub2/grubenv&quot;
fi

if [[ -z $zipl_config ]]; then
    zipl_config=&quot;/etc/zipl.conf&quot;
fi

if [[ -z $grub_config ]]; then
    grub_config=&quot;/boot/grub2/grub.cfg&quot;
fi

if [[ -z $grub_etc_default ]]; then
    grub_etc_default=&quot;/etc/default/grub&quot;
fi

get_bls_values

default_index=&quot;$(get_default_index)&quot;

if [[ -n $display_default ]]; then
    display_default_value
fi

if [[ -n $display_info ]]; then
    display_info_values &quot;${display_info}&quot;
fi

remove_var_prefix &quot;$(get_prefix)&quot;

if [[ -n $kernel ]]; then
    if [[ $copy_default = &quot;true&quot; ]]; then
	opts=&quot;${bls_options[$default_index]}&quot;
	if [[ -n $args ]]; then
	    opts=&quot;${opts} ${args}&quot;
	fi
    else
	opts=&quot;${opts} ${args}&quot;
	remove_args=&quot;$kernelopts&quot;
	update_args &quot;${opts}&quot; &quot;${remove_args}&quot; &quot;&quot;
    fi

    add_bls_fragment &quot;${kernel}&quot; &quot;${title}&quot; &quot;${opts}&quot; &quot;${initrd}&quot; \
                     &quot;${extra_initrd}&quot;
fi

if [[ -n $remove_kernel ]]; then
    remove_bls_fragment &quot;${remove_kernel}&quot;
fi

if [[ -n $update_kernel ]]; then
    update_bls_fragment &quot;${update_kernel}&quot; &quot;${remove_args}&quot; &quot;${args}&quot; &quot;${initrd}&quot;
fi

if [[ -n $set_default ]]; then
    set_default_bls &quot;${set_default}&quot;
fi

exit 0
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