[C++知识库]C 语言中获取 Luci 配置内容实战记录(openwrt )

本篇记录是续上一篇、openWRT 中 Web 配置参数的延续，系统中有web的配置方法，程序中需要获取配置内容，更新程序运行状态。
下面直接把程序贴上来，不解释什么了。

#include <chrono>
#include <iostream>
#include <thread>
#include <mutex>
#include <fstream>

#include <stdint.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/select.h>

#include "uci.h"      //> libuci.so 接口头文件，具体 uci 提供 api 内容.

uint32_t Lora_GateWay::Uci_Get_GateWay_Sn(const char *sn){
    struct uci_context *c;
    struct uci_ptr p;
    char *a = strdup("gatewayConf.parament.sn");
    c = uci_alloc_context();
    try
    {
        /* code */
        if (UCI_OK != uci_lookup_ptr(c, &p, a, true)) {
            uci_perror(c, "no found!\n");
            spdlog::error("{} no found :{}",__FILE__, a);
            uci_free_context(c);
            free(a);
            return -1;
        }
        std::printf("SN: %s, len:%d\n", p.o->v.string, strlen(p.o->v.string));
        if(strlen(p.o->v.string) <= 25){
            std::strcpy((char*)sn, p.o->v.string);
            //std::memcpy((char*)sn, (char*)p.o->v.string, strlen(p.o->v.string));
            uci_free_context(c);
            free(a);
            return (0);
        }else
        {
            /* code */
            uci_free_context(c);
            free(a);
            return -2;
        }
    }
    catch(const std::exception& e)
    {
        spdlog::error("{} Exception: {}",__FILE__, e.what());
        uci_free_context(c);
        free(a);
        return -3;
    }
}



uint32_t Lora_GateWay::Uci_Get_GateWay_ipv4addr(const char *addr){
    struct uci_context *c;
    struct uci_ptr p;
    char *a = strdup("gatewayConf.parament.IPv4addr");
    c = uci_alloc_context();

    try
    {
        /* code */
        if (UCI_OK != uci_lookup_ptr(c, &p, a, true)) {
            uci_perror(c, "no found!\n");
            spdlog::error("{} no found :{}",__FILE__, a);
            uci_free_context(c);
            free(a);
            return -1;
        }
        printf("IPv4addr: %s, len:%d\n", p.o->v.string, strlen(p.o->v.string));
        std::strcpy((char*)addr, p.o->v.string);
        uci_free_context(c);
        free(a);
        return(0);
    }
    catch(const std::exception& e)
    {
        spdlog::error("{} Exception: {}",__FILE__, e.what());
        uci_free_context(c);
        free(a);
        return(-2);
    }
}



uint32_t Lora_GateWay::Uci_Get_GateWay_heartbeat(const char *hb){
    struct uci_context *c;
    struct uci_ptr p;
    char *a = strdup("gatewayConf.parament.HeartBeat");
    c = uci_alloc_context();
    try
    {
        /* code */
        if (UCI_OK != uci_lookup_ptr(c, &p, a, true)) {
            uci_perror(c, "no found!\n");
            spdlog::error("{} no found :{}",__FILE__, a);
            uci_free_context(c);
            free(a);
            return -1;
        }
        printf("HeartBeat: %s\n", p.o->v.string);
        std::strcpy((char*)hb, p.o->v.string);
        uci_free_context(c);
        free(a);
        return(0);
    }
    catch(const std::exception& e)
    {
        spdlog::error("{} Exception: {}",__FILE__, e.what());
        uci_free_context(c);
        free(a);
        return(-2);
    }
}

此程序是 Lora_GateWay类的三个方法，获取 luci 配置的数据内容。