[yocto] Enable wpa_supplicant at wlan0.service on boot with systemd

[ChenQi]

For the current codes, manually creating symlink is the easiest way to 
achieve your goal.
The current mechanism in systemd.bbclass has to 'enable' or 'disable' 
all services in SYSTEMD_SERVICE_xxx. There's no mechanism to enable or 
disable a subset of them.
This might need to be improved.

Best Regards,
Chen Qi

On 11/14/2018 05:11 PM, Conor Slater wrote:
> Dear All,
>
> I'm trying to start wpa_supplicant with wlan0 as the interface on boot 
> using systemd.
>
> I've created the following .bbappend for wpa_supplicant to install the 
> new configuration and enable the wpa_supplicant at wlan0.service. This 
> doesn't enable the service and somehow breaks being able the start the 
> wpa_supplicant at wlan0.service.
>
> Has anybody else figured out how to get this to work?
>
> $ cat wpa-supplicant_2.%.bbppend:
>
> FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
>
> SRC_URI_append = " file://wpa_supplicant-wlan0.conf"
>
> inherit systemd
>
> SYSTEMD_PACKAGES = "${PN}"
> SYSTEMD_SERVICE_${PN} += " wpa_supplicant at wlan0.service"
> SYSTEMD_AUTO_ENABLE = "enable"
>
> do_install_append () {
>     install -d ${D}${sysconfdir}/wpa_supplicant
>     install -m 0644 ${WORKDIR}/wpa_supplicant-wlan0.conf 
> ${D}/${sysconfdir}/wpa_supplicant/
> }
>
> As a workaround, I created a .bbappend to manually create the symlink 
> for systemd which does enable the service. Although, I would like to 
> know if there is a better way of doing this.
>
> $ cat wpa-supplicant_2.%.bbppend:
>
> FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
>
> SRC_URI_append = " file://wpa_supplicant-wlan0.conf"
>
> do_install_append () {
>     install -d ${D}${sysconfdir}/wpa_supplicant
>     install -m 0644 ${WORKDIR}/wpa_supplicant-wlan0.conf 
> ${D}/${sysconfdir}/wpa_supplicant/
>     install -d ${D}${sysconfdir}/systemd/system/multi-user.target.wants
>     ln -s ../../../../lib/systemd/system/wpa_supplicant at .service 
> ${D}${sysconfdir}/systemd/system/multi-user.target.wants/wpa_supplicant at wlan0.service
> }
>
>
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.yoctoproject.org/pipermail/yocto/attachments/20181114/a94305de/attachment.html>