[OE-core] [PATCH V5 2/4] image.bbclass: add two hook funtions

[ChenQi]

Hi Otavio:

V6 has been sent with support for customized conf files.
Also, the specific conf files are provided by corresponding image 
recipes, because the contents of the conf files are closely related to 
the image types.

Cheers,
Chen Qi

On 01/02/2013 02:12 AM, Otavio Salvador wrote:
> On Mon, Dec 31, 2012 at 12:16 AM,  <Qi.Chen at windriver.com> wrote:
>> From: Chen Qi <Qi.Chen at 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.
>>
>> choose_volatile_conf_file: this function is invoked no matter
>> 'read-only-rootfs' is in IMAGE_FEATURES or not, it properly chooses
>> the right conf file for volatile storage handling according to the
>> IMAGE_FEATURES.
>>
>> [YOCTO #3406]
>>
>> Signed-off-by: Chen Qi <Qi.Chen at windriver.com>
>> ---
>>   meta/classes/image.bbclass |   30 ++++++++++++++++++++++++++++++
>>   1 file changed, 30 insertions(+)
>>
>> diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
>> index d3a416d..57bd0e3 100644
>> --- a/meta/classes/image.bbclass
>> +++ b/meta/classes/image.bbclass
>> @@ -396,6 +396,36 @@ zap_root_password () {
>>          mv ${IMAGE_ROOTFS}/etc/passwd.new ${IMAGE_ROOTFS}/etc/passwd
>>   }
>>
>> +# A hook function to support read-only-rootfs IMAGE_FEATURES
>> +read_only_rootfs_hook () {
>> +       # Tweak the mount option in fstab
>> +       sed -i '/rootfs/ s/defaults/ro/' ${IMAGE_ROOTFS}/etc/fstab
> Maybe use 'defaults,ro' in 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
>> +               ${IMAGE_ROOTFS}/etc/init.d/populate-volatile.sh
>> +       fi
>> +}
>> +
>> +# Choose the correct config file for volatile storage handling according to the image type
>> +choose_volatile_conf_file () {
>> +       if ${@base_contains("IMAGE_FEATURES", "x11-sato", "true", "false" ,d)}; then
>> +               if [ -e ${IMAGE_ROOTFS}/etc/default/volatiles_stage/volatiles-readonly-sato ]; then
>> +                       cp ${IMAGE_ROOTFS}/etc/default/volatiles_stage/volatiles-readonly-sato \
>> +                               ${IMAGE_ROOTFS}/etc/default/volatiles/00_core_readonly
>> +               fi
>> +       else
>> +               if [ -e ${IMAGE_ROOTFS}/etc/default/volatiles_stage/volatiles-readonly-minimal ]; then
>> +                       cp ${IMAGE_ROOTFS}/etc/default/volatiles_stage/volatiles-readonly-minimal \
>> +                               ${IMAGE_ROOTFS}/etc/default/volatiles/00_core_readonly
>> +               fi
>> +       fi
> Wouldn't be better to have a package which provides the need valatile
> config? this makes it easy to reuse for other images.
>
>> +}
>> +
>>   # allow openssh accept login with empty password string
>>   openssh_allow_empty_password () {
>>          if [ -e ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config ]; then
>> --
>> 1.7.9.5
>>
>>
>> _______________________________________________
>> Openembedded-core mailing list
>> Openembedded-core at lists.openembedded.org
>> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
>
>
> --
> Otavio Salvador                             O.S. Systems
> E-mail: otavio at ossystems.com.br  http://www.ossystems.com.br
> Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br
>
>