OpenWrt 系统UCI详解(Lua、C语言调用uci接口实例)

config 'example' 'test'
	option  'string'    'some value'
	option  'boolean'   '1'
	list   'collection'  'first item'
	list   'collection'  'second item' 

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <uci.h>
 
static struct uci_context *uci_ctx = NULL;
static struct uci_package *uci_test;
static struct uci_package *
config_init_package(const char *config)
{
    struct uci_context *ctx = uci_ctx;
    struct uci_package *p = NULL;
 
    if (!ctx)
    {
        ctx = uci_alloc_context();
        uci_ctx = ctx;
        ctx->flags &= ~UCI_FLAG_STRICT;
        //if (config_path)
        //  uci_set_confdir(ctx, config_path);
    }
    else
    {
        p = uci_lookup_package(ctx, config);
        if (p)
            uci_unload(ctx, p);
    }
 
    if (uci_load(ctx, config, &p))
        return NULL;
 
    return p;
}
int config_alloc(void)
{
    uci_test = config_init_package("test");
    if (!uci_test)
    {
        printf("Failed to load test config\n");
        return -1;
    }
    return 0;
}
 
int config_free(void)
{
    if (uci_test)
    {
        uci_unload(uci_ctx, uci_test);
        uci_test = NULL;
    }
    if (uci_ctx)
    {
        uci_free_context(uci_ctx);
        uci_ctx = NULL;
    }
}
 
int main(int argc, char *argv[])
{
    int ret = 0;
    int enable = 0;
    config_alloc();
    struct uci_section *global_sec = uci_lookup_section(uci_ctx, uci_test, "global");
    if (!global_sec)
    {
        printf("get global section failed\n");
        config_free();
        return 0;
    }
 
    char *name = uci_lookup_option_string(uci_ctx, global_sec, "name");
    if (!name)
    {
        printf("name option not found.\n");
        config_free();
        return 0;
    }
    printf("name = %s\n", name);
    free(name);
    struct uci_ptr ptr ={
                .package = "test",
                .section = "global",
                .option = "name",
                .value = "xxxxxxxxxx"
            };
    ret = uci_set(uci_ctx, &ptr);   
    if(ret != UCI_OK)
    {
        printf("set name...failed\n");
    }
    else{
        printf("set name...ok\n");
    }
    uci_save(uci_ctx, ptr.p);
    uci_commit(uci_ctx, &ptr.p, false);
    config_free();
    return 0;
}

config global 'global'
    option name 'derry'
    option id '1'
    list address 'shenzhen'
    list address 'guangzhou'
    list address 'beijing'

1. 不带参数初始化（配置目录默认/etc/config）

x = uci.cursor()

2. 包含状态值

x = uci.cursor(nil, "/var/state")

3. 指定配置目录

x = uci.cursor("/etc/mypackage/config", "/tmp/mypackage/.uci")

#!/usr/bin/lua
require("uci")
x = uci.cursor()
function show_test_config()
    name = x:get("test", "global", "name")
    id = x:get("test", "global", "id")
    addr_list = x:get("test", "global", "address")
    print("name="..name)
    print("id="..id)
for key, value in ipairs(addr_list) 
do 
print("address["..key.."]----"..value) 
end
end
 
print("==========before change=========")
show_test_config()
x:set("test", "global", "name", "xxxxxxx")
x:set("test", "global", "id", "8888888")
 
x:set("test","global","address",{"1111","2222","33333","4444","5555"})
x:commit("test")
print("==========after change=========")
show_test_config()

#!/usr/bin/lua
require("uci")
x=uci.cursor()
conf=x:get_all("test", "global")
 
print(conf["name"]);
print(conf["id"]);
for key, value in ipairs(conf["address"])
do
    print(value);
end