🚸 Improve ro detection for when both are present

Signed-off-by: Daniel Ruthardt <druthardt@linuxfoundation.org>

Author: Daniel Ruthardt

debian/changelog

@@ -2,6 +2,7 @@ cloud-initramfs-tools (0.49) noble; urgency=medium
 
   [ Daniel Ruthardt ]
   * overlayroot: Add support for multiple overlay devices
+  * overlayroot: Improve ro detection for when both ro and rw are present
 
  -- Daniel Ruthardt <druthardt@linuxfoundation.org>  Thu, 8 Feb 2024 13:24:00 -0600
 

overlayroot/scripts/init-bottom/overlayroot

@@ -713,7 +713,8 @@ overlayroot_driver=${_RET_common_driver}
 
 read cmdline </proc/cmdline
 cmdline=" $cmdline "
-[ "${cmdline#* ro }" != "$cmdline" ] && cmdline_ro=true || cmdline_ro=false
+if ([ "${cmdline#* ro }" != "$cmdline" ] && [ "${cmdline#* ro }" != *rw* ]) && cmdline_ro=true || \
+	cmdline_ro=false
 
 if [ "${overlayroot_driver:-auto}" = "auto" ]; then
 	search_fs_driver overlay overlayfs ||