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
> + # 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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