yocto systemd在启动后无法启动服务

问题描述 投票:0回答:2

我尝试将can0添加到systemd以便在imx8板上的启动时自动启动。但是我无法使用这些配置:

$tree recipes-core/
----------------------------------------
recipes-core/
└── systemd
    ├── systemd-machine-units
    │   ├── 10-eth0.network
    │   ├── 10-eth1.network
    │   ├── 90-dhcp-default.network
    │   ├── can0.service
    │   └── can1.service
    └── systemd-machine-units_1.0.bbappend

2 directories, 6 files
$ cat systemd-machine-units_1.0.bbappend 
-------------------------------------------------------------
FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"

# all our boards have at least one native network port
SRC_URI = " \
    file://10-eth0.network \
    file://90-dhcp-default.network \
    file://10-eth1.network \
    file://can0.service \
    file://can1.service \
"

SYSTEMD_SERVICE_${PN} = "can0.service can1.service"


do_install_append() {
    install -d ${D}${systemd_unitdir}/network/
    install -m 0644 "${WORKDIR}/10-eth0.network" ${D}${systemd_unitdir}/network/
    install -m 0644 "${WORKDIR}/90-dhcp-default.network" ${D}${systemd_unitdir}/network/
    install -m 0644 "${WORKDIR}/10-eth1.network" ${D}${systemd_unitdir}/network/
    install -d ${D}${systemd_system_unitdir}/
    install -m 0644 "${WORKDIR}/can0.service" ${D}${systemd_system_unitdir}/
    install -m 0644 "${WORKDIR}/can1.service" ${D}${systemd_system_unitdir}/

}

FILES_${PN} = "\
    ${systemd_system_unitdir} \
    ${systemd_unitdir}/network/ \
"
$cat can0.service 
--------------------------------------------------------------------------------
# For 2.0B legacy mode, arbitration bit rate (bitrate) and
# payload bit rate (dbitrate) have the same value - not higher than 1Mbps.
# CAN frames are limited to max 8 bytes in this case
# if target does not support FD, fg settings are not accepted by ip link set
[Unit]
Description=can0 interface setup

[Service]
Type=simple
RemainAfterExit=yes
ExecStart=/sbin/ip link set can0 up type can bitrate 500000
ExecStop=/sbin/ip link set can0 down

[Install]
WantedBy=basic.target

在目标根上搜索can0.service,但未找到:

$cd lib/systemd/ && find -name "*can*"
--------------------------------------------
./system/wpa_supplicant.service
./system/[email protected]
./system/[email protected]
./system/[email protected]

此外,我尝试在这些文件中添加systemd _%。bbappend:(也有与下面的代码不同的系统树。can0.service在service _%。bbappend文件附近的文件文件夹下)

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"

SRC_URI += "file://can0.service"

SYSTEMD_SERVICE_${PN} = "can0.service can1.service"

FILES_${PN} += "{sysconfdir}/systemd/system/* "

do_install_append() {
    install -d ${D}${systemd_unitdir}/system/
    install -m 0644 ${WORKDIR}/*.service ${D}${systemd_unitdir}/system/
}

can0.service由以上systemd _%。bb创建,但在启动时不会自动启动。 can0.service似乎位于目标的/ lib / systemd / system文件夹中。

我的错是什么?有人可以帮我吗?

yocto systemd
2个回答
1
投票

上面发布的cat0服务状态表明该服务未启用。

您可以使用命令systemctl enable cat0启用此服务,然后尝试重新引导系统。

处于启用状态的服务在系统重新引导后自动出现。


0
投票

[enable会将指定的单元挂接到相关位置,以便它会根据单元文件中指定的内容在启动或其他情况下自动启动。

从systemctl版本220开始,启用和禁用支持--now开关,以在启用/禁用的同时启动/停止服务。

例如systemctl --now enable foobar.service

使用systemctl --version检查您安装的版本。

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