openwrt-ubus

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了解openwrt ubus用法

更新記錄

item note
20170105 第一版

目錄

ubus (OpenWrt micro bus architecture)

來源：ubus (OpenWrt micro bus architecture)

  • ubus (OpenWrt micro bus architecture)
    • provide communication between various daemons and applications
    • using Unix sockets and it uses TLV (type-length-value) messages
    • Every daemon registers a set of paths under a specific namespace.
    • The ubus command line tool allows to interact with the ubusd server

ubus

  • 顯示目前系統ubus提供那些service
    ubus list

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    root@OpenWrt:/# ubus list
    dhcp
    log
    network
    network.device
    network.interface
    network.interface.lan
    network.interface.loopback
    network.interface.wan
    network.interface.wan6
    network.wireless
    service
    session
    system
    uci

  • 顯示system service 細節
    -v (More verbose output)
    顯示提供那些call object method

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    root@OpenWrt:/# ubus -v list system
    'system' @b4b76d22
            "board":{}
            "info":{}
            "upgrade":{}
            "watchdog":{"frequency":"Integer","timeout":"Integer","stop":"Boolean"}
            "signal":{"pid":"Integer","signum":"Integer"}
            "nandupgrade":{"path":"String"}
    root@OpenWrt:/#

  • 呼叫ubus service

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    root@OpenWrt:/# ubus call system board
    {
            "kernel": "3.18.29",
            "hostname": "OpenWrt",
            "system": "Atheros AR7240 rev 2",
            "model": "TP-Link TL-WR741N\/ND v1",
            "release": {
                    "distribution": "OpenWrt",
                    "version": "Chaos Calmer",
                    "revision": "r49118",
                    "codename": "chaos_calmer",
                    "target": "ar71xx\/generic",
                    "description": "OpenWrt Chaos Calmer 15.05.1"
            }
    }

其它

openwrt中ubus的具体使用

來源：openwrt中ubus的具体使用

  • ubus有两种调用，一个是method调用，一个是notification

    • 其中method包括等待函数返回和不用等待返回
    • notification是广播和DBus的signal类似

  • ubus可以和ubusd服务器交互(和当前所有已经注册的服务).它对研究和调试注册的命名空间以及编写脚本非常有用

  • ubuscall 调用指定命名空间中指定的方法，并且通过消息传递给它， 消息参数必须是有效的JSON字符串，并且携带函数所要求的键及值

參考