[OE-core] [PATCH 2/4] initramfs-framework: support ro boot parameter

[Patrick Ohly]

Default is to mount the rootfs read/write. "ro" can be used to turn
that into read-only, which is useful on systems where userspace does
an fsck before remounting read-write.

Giving both "ro" and "rw" will still mount read-only regardless of the
order, because the ordering information is not preserved by the
initramfs-framework's boot param support.

Signed-off-by: Patrick Ohly <patrick.ohly at intel.com>
---
 meta/recipes-core/initrdscripts/initramfs-framework/finish | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/finish b/meta/recipes-core/initrdscripts/initramfs-framework/finish
index 006aef2..a8806aa 100755
--- a/meta/recipes-core/initrdscripts/initramfs-framework/finish
+++ b/meta/recipes-core/initrdscripts/initramfs-framework/finish
@@ -23,6 +23,12 @@ finish_run() {
 
 			if [ -e "$bootparam_root" ]; then
 				flags=""
+				if [ -n "$bootparam_ro" ]; then
+					if [  -n "$bootparam_rootflags" ]; then
+						bootparam_rootflags="$bootparam_rootflags,"
+					fi
+					bootparam_rootflags="${bootparam_rootflags}ro"
+				fi
 				if [ -n "$bootparam_rootflags" ]; then
 					flags="$flags -o$bootparam_rootflags"
 				fi
-- 
2.1.4