I am new to yocto and I am using systemd as the init manager. I'd like to start
a service (initializing CAN interface) at boot time. The service is a template
and its name is [email protected]:
[Unit]
Description=CAN Interface %I
Before=multi-user.target
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStartPre=/sbin/ip link set %I type can bitrate 250000
ExecStart=/sbin/ip link set %I up
ExecStop=/sbin/ip link set %I down
[Install]
WantedBy=multi-user.target
I wrote a recipe can-systemd.bb in order to install the service mentioned above:
SUMMARY = "Configuration file to set up CAN interface"
DESCRIPTION = "Used to setup the CAN interface"
LICENSE = "MIT"
LIC_FILES_CHKSUM =
"file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
inherit systemd
SYSTEMD_SERVICE_${PN} = " \
[email protected] \
"
SRC_URI_append = " \
file://[email protected] \
"
FILES_${PN} += " \
${sysconfdir}/systemd/system/[email protected] \
"
do_install_append() {
install -d ${D}${sysconfdir}/systemd/system
install -m 0644 ${WORKDIR}/[email protected] ${D}${sysconfdir}/systemd/system
}
When I run bitbake to create the image, I would expect that a symlink
([email protected] -> /etc/systemd/system/[email protected]) in the folder
/etc/systemd/system/multi-user.target.wants should be generated. But this is
not the case.
I think, the SYSTEMD_SERVICE_${PN}... assignment should create that link. Is
this correct, or does anyone could show me how to start an instance of the
template of this service.
Thanks for your support.
Rob
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