From f1764a1c6d7187c191011327e1631fd056bbfae0 Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Mon, 25 Jul 2022 22:02:03 -0700
Subject: [PATCH] boot-qemu: Introduce --append

Introduce optional "--append" argument to add an additional string to
the kernel command line.

Signed-off-by: Kees Cook <keescook@chromium.org>
---
 README.txt   | 3 +++
 boot-qemu.sh | 6 +++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/README.txt b/README.txt
index 9752dbd..e27129d 100644
--- a/README.txt
+++ b/README.txt
@@ -30,6 +30,9 @@ Required parameters:
     is being run.
 
 Optional parameters:
+  --append:
+    Adds additional kernel boot params to the kernel command line.
+
   -d | --debug:
     Invokes 'set -x' for debugging the script.
 
diff --git a/boot-qemu.sh b/boot-qemu.sh
index 85ff10f..f3bd73e 100755
--- a/boot-qemu.sh
+++ b/boot-qemu.sh
@@ -2,6 +2,7 @@
 
 # Root of the repo
 BASE=$(cd "$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")" && pwd)
+APPEND_STRING=""
 
 source "${BASE}"/utils.sh
 
@@ -22,6 +23,10 @@ function parse_parameters() {
                 esac
                 ;;
 
+            --append)
+                shift && APPEND_STRING="${1} "
+                ;;
+
             -d | --debug)
                 set -x
                 ;;
@@ -167,7 +172,6 @@ function setup_qemu_args() {
         ROOTFS=${IMAGES_DIR}/rootfs.cpio
     fi
 
-    APPEND_STRING=""
     if ${INTERACTIVE}; then
         if ${DEBIAN}; then
             APPEND_STRING+="root=/dev/vda "