[OE-core] systemd service vs. update-alternatives (was rsyslog: buggy systemd/ua handling?)

[ChenQi]

I sent out a series of patches regarding syslog & systemd some time ago.
The title is "[OE-core] [PATCH V3 0/4] Fixes for systemd services in 
systemd".
Codes regarding update-alternatives and syslog for 'rsyslog' recipe is 
actually part of the whole fix.
You could try the patch series to see if they work for you.

Regards,
Chen Qi

On 11/19/2015 10:34 PM, Steffen Sledz wrote:
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> On 18.11.2015 17:14, Steffen Sledz wrote:
>> On 17.11.2015 09:08, Steffen Sledz wrote:
>>> On 16.11.2015 12:28, Steffen Sledz wrote:
>>>> I'm not sure but i believe there's a bug in the systemd/ua-handling in meta-oe/recipes-extended/rsyslog/rsyslog_7.6.1.bb.
>>>>
>>>> In my opinion this code
>>>>
>>>> if bb.utils.contains('DISTRO_FEATURES', 'systemd', True, False, d): pn = d.getVar('PN', True) d.appendVar('ALTERNATIVE_%s' % (pn), ' syslog-service') d.setVarFlag('ALTERNATIVE_LINK_NAME', 'syslog-service', '%s/systemd/system/syslog.service' % (d.getVar('sysconfdir', True))) d.setVarFlag('ALTERNATIVE_TARGET', 'syslog-service', '%s/system/rsyslog.service' % (d.getVar('systemd_unitdir', True)))
>>>>
>>>> registers the systemd service file under the (ua-)name "syslog-service". So it should not be
>>>>
>>>> SYSTEMD_SERVICE_${PN} = "${BPN}.service"
>>>>
>>>> but
>>>>
>>>> SYSTEMD_SERVICE_${PN} = "syslog.service"
>>>>
>>>> Right?
>>> Hi experts! Is my assumption correct? If yes i would prepare patches for master, fido and jethro.
> The problem seems to be much more complex then I thought before. :(
>
> The systemd integration for busybox-syslog was introduced by commit cf3618f9a57e46fb78d5be35d473e2dd5290e961.
>
> The do_install stage got among others this line:
>
>    ln -sf /dev/null ${D}${systemd_unitdir}/system/syslog.service
>
> I believe this was made to avoid a package error like this:
>
>    ERROR: Function failed: SYSTEMD_SERVICE_busybox-syslog value syslog.service does not exist
>
> But if another syslog alternative (rsyslog or syslog-ng) will do the same this leads to another error:
>
>    ERROR: The recipe busybox is trying to install files into a shared area when those files already exist. Those files and their manifest location are:
>     /home/sledz/work/hipos-dfe.fido/build-closed/tmp-glibc/sysroots/himx0294/lib/systemd/system/syslog.service
>
> So what is th right way to bring a systemd service file and update-alternatives together???
>
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