From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Javier Martinez Canillas <javierm@redhat.com>

Date: Mon, 10 Dec 2018 13:11:58 +0100

Subject: [PATCH] Make grub2-mkconfig to honour GRUB_CMDLINE_LINUX in

 /etc/default/grub

The kernelopts grub environment variable is set with the GRUB_CMDLINE_LINUX

value only if wasn't set before. This is because the kernel cmdline params

of the entries are not in the grub.cfg anymore so grub2-mkconfig shouldn't

have side effects on neither the entries nor their kernel cmdline params.

But there's a lot of documentation pointing at modifying GRUB_CMDLINE_LINUX

to change the kernel cmdline params and users have built a muscle memory on

it, so the BLS support should be compatible.

Make the grub2-mkconfig script update the $kernelopts environment variable

unless the --no-grubenv-update option is used.

Resolves: rhbz#1637875

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

---

 util/grub-mkconfig.8        | 4 ++++

 util/grub-mkconfig.in       | 6 ++++++

 util/grub.d/10_linux.in     | 2 +-

 util/grub.d/10_linux_bls.in | 2 +-

 4 files changed, 12 insertions(+), 2 deletions(-)

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

index a2d1f577b..434fa4ded 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 c20171919..5e643e169 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

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

index b54d2774a..da2992ac9 100644

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

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

@@ -165,7 +165,7 @@ if [ -s \$prefix/grubenv ]; then

 fi

 EOF

-    if ! grub2-editenv - list | grep -q kernelopts; then

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

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

     fi

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

index 8cff4c58a..175bedd07 100644

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

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

@@ -225,7 +225,7 @@ linux_entry ()

     populate_header_warn

     populate_menu

-    if ! grub2-editenv - list | grep -q kernelopts; then

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

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

     fi