Handle updating /etc/kernel/cmdline

Resolves: #1969362
Signed-off-by: Robbie Harwood <rharwood@redhat.com>

grubby-bls

@@ -502,6 +502,16 @@ update_bls_fragment() {
                 opts="$(echo "$opts" | sed -e 's/\//\\\//g')"
                 sed -i -e "s/^GRUB_CMDLINE_LINUX.*/GRUB_CMDLINE_LINUX=\\\"${opts}\\\"/" "${grub_etc_default}"
             fi
+
+	    if [[ -f /etc/kernel/cmdline ]]; then
+		sed -i "s/\(root=[^ ]*\) .*/\1 ${opts}/" /etc/kernel/cmdline
+	    else
+		# grub2-mkconfig creates this.  Do that now.
+		grub2-mkconfig -o /etc/grub2.cfg
+	    fi
+	    if [[ ! -f /etc/kernel/cmdline ]]; then
+		echo "No /etc/kernel/cmdline; please report a bug";
+	    fi
         fi
 
         old_args="$(grub2-editenv "${env}" list | grep kernelopts | sed -e "s/kernelopts=//")"
@@ -528,6 +538,20 @@ update_bls_fragment() {
 	fi
     done
 
+    if [[ $param = "ALL" && $bootloader = zipl ]] && [[ -n $remove_args || -n $add_args ]]; then
+	if [[ ! -f /etc/kernel/cmdline ]]; then
+	    # anaconda could pre-populate this file, but until then, most of
+	    # the time we'll just want the most recent one.  This is pretty
+	    # close to the current almost-correct behavior of falling back to
+	    # /proc/cmdline anyhow.
+	    echo "$(get_bls_args -1)" > /etc/kernel/cmdline
+	fi
+
+	read old_args < /etc/kernel/cmdline
+	local new_args="$(update_args "${old_args}" "${remove_args}" "${add_args}")"
+	echo "$new_args" > /etc/kernel/cmdline
+    fi
+
     update_grubcfg
 }
 

grubby.spec

@@ -1,6 +1,6 @@
 Name: grubby
 Version: 8.40
-Release: 59%{?dist}
+Release: 60%{?dist}
 Summary: Command line tool for updating bootloader configs
 License: GPLv2+
 URL: https://github.com/rhinstaller/grubby
@@ -131,6 +131,10 @@ current boot environment.
 %{_mandir}/man8/*.8*
 
 %changelog
+* Thu Aug 11 2022 Robbie Harwood <rharwood@redhat.com> - 8.40-60
+- Handle updating /etc/kernel/cmdline
+- Resolves: #1969362
+
 * Wed Jul 20 2022 Robbie Harwood <rharwood@redhat.com> - 8.40-59
 - Appease upgrade tests by keeping deprecated version in lockstep
 - Resolves: #2105118