On 02/19/2013 07:39 PM, Bernhard Reutner-Fischer wrote:
On 19 February 2013 08:38, <qi.c...@windriver.com> wrote:
From: Chen Qi <qi.c...@windriver.com>
read_only_rootfs_hook: this funtion is invoked only if 'read-only-rootfs'
is in IMAGE_FEATURES. It tweaks some basic files and makes populate-
volatile.sh script run at rootfs time.
For now, it has real effect only if the init system is sysvinit.
[YOCTO #3406]
Signed-off-by: Chen Qi <qi.c...@windriver.com>
---
meta/classes/image.bbclass | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
index dd78acb..7d533b6 100644
--- a/meta/classes/image.bbclass
+++ b/meta/classes/image.bbclass
@@ -233,6 +233,24 @@ run_intercept_scriptlets () {
fi
}
+# A hook function to support read-only-rootfs IMAGE_FEATURES
+# Currently, it only supports sysvinit system.
+read_only_rootfs_hook () {
+ if ${@base_contains("DISTRO_FEATURES", "sysvinit", "true", "false",
d)}; then
+ # Tweak the mount option in fstab
+ sed -i '/rootfs/ s/defaults/ro/' ${IMAGE_ROOTFS}/etc/fstab
to be cautious i would say
sed -i -e '/^[#[:space:]]*rootfs/s/defaults/ro/' ${IMAGE_ROOTFS}/etc/fstab
for ro rootfs fs_passno should be set to 0, too, imo:
sed -i -e
'/^[#[:space:]]*rootfs/{s/defaults/ro/;s/\([[:space:]]*[[:digit:]]\)\([[:space:]]*\)[[:digit:]]$/\1\20/}'
${IMAGE_ROOTFS}/etc/fstab
Thank you for your suggestion.
Version 2 has been sent out.
Best Regards,
Chen Qi
+ # Change the value of ROOTFS_READ_ONLY in /etc/default/rcS to
yes
+ if [ -e ${IMAGE_ROOTFS}/etc/default/rcS ]; then
+ sed -i 's/ROOTFS_READ_ONLY=no/ROOTFS_READ_ONLY=yes/'
${IMAGE_ROOTFS}/etc/default/rcS
+ fi
+ # Run populate-volatile.sh at rootfs time to set up basic files
+ # and directories to support read-only rootfs.
+ if [ -e ${IMAGE_ROOTFS}/etc/init.d/populate-volatile.sh ]; then
-x if you want to execute it below.
+ ${IMAGE_ROOTFS}/etc/init.d/populate-volatile.sh
+ fi
+ fi
+}
+
fakeroot do_rootfs () {
#set -x
# When use the rpm incremental image generation, don't remove the
rootfs
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