[oe] Cron job additions from image and package update

[Cliff Brake]

On Mon, Aug 20, 2012 at 9:21 AM, Bryan Evenson <bevenson at melinkcorp.com>wrote:

> I am on the 2011.03-maintenance branch of OpenEmbedded.  I have a few cron
> jobs that I want my device to run, but I am having issues getting updated
> images to apply the new cron job list.  I would like the cron jobs to be
> installed for root in the built image and I would also like to be able to
> update the cron job list through an appropriate package.  I am having
> problems with both tasks.
>
> First, I have a customized image for my system.  In the image recipe, I am
> using an addition to the ROOTFS_POSTPROCESS_COMMAND to add my cron job
> list.  This is what I am doing so far inside my image's Bitbake recipe
> related to cron:
>
> rootfs_postprocess() {
>         # cron: Add cron jobs for our image
>         cd ${IMAGE_ROOTFS}
>         cd etc
>         echo '<text for job 1>' > temp_cron.txt
>         echo '<text for job 2>' >> temp_cron.txt
>         echo '<text for job 3>' >> temp_cron.txt
>         crontab temp_cron.txt
> }
>
> ROOTFS_POSTPROCESS_COMMAND += " rootfs_postprocess; "
>
> When I bitbake my image and look at the resulting filesystem, I see that
> /etc/temp_cron.txt exists but there are no entries under /var/cron/tabs.
>  If I burn my new image onto a board, login as root and then call "crontab
> /etc/temp_cron.txt", then the cron jobs are installed as expected.  I've
> also tried changing the last line of the rootfs_postprocess function to
> "crontab -u root temp_cron.txt", but then I get then following error during
> the image build:
>
> | ERROR: ld.so: object 'libfakeroot.so' from LD_PRELOAD cannot be
> preloaded: ignored.
> | must be privileged to use -u
>
> I assume this is all related to some intricacies of using crontab under
> fakeroot but I haven't yet found a solution.  Anyone else successfully
> installing cron jobs on their image?
>
> Also, this would then install the cron jobs on the image but there is no
> opkg package created that contains the updated cron job list.  I would like
> to be able to perform an opkg install or upgrade to apply new system
> settings like this.  Do I need to create a separate recipe so that these
> system files are included in a package, or is there a ways to do this from
> my existing image recipe?
>
>
What about having the crontab run on the target as part of the package
install?

http://pokylinux.org/doc/poky-handbook.html#usingpoky-extend-addpkg-postinstalls

Thanks,
Cliff

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