Openwrt21.02应用日志全局开关控制

在部署好的Openwrt系统上实现自定义应用日志的全局开关控制

Openwrt系统本身有系统日志、内核日志，应用日志默认会写入系统日志中，但是用户可以通过修改配置文件来关闭应用日志写入系统日志。通过Luci界面开发，提供一个开关，用户可以控制自定义应用日志是否写入系统日志。但一些 sshd、kernel 或其他系统日志仍会写入。

步骤1：创建全局UCI配置文件

cat << "EOF" > /etc/config/luci_global_log
config global 'settings'
    option enable '1'      # 1启用，0禁用，默认启用
    option log_level 'info'  # 日志级别，可选值：info, debug, warning, err, crit
EOF

步骤2：创建全局日志管理模块

-- luci\lua\luci\log_switch.lua
module("luci.log_switch", package.seeall)

local uci = require "luci.model.uci"


-- 读取全局开关状态（带缓存，避免每次读UCI）
local _cache = nil
function is_log_enabled()
    if _cache == nil then
        local cursor = uci.cursor()
        local enabled = cursor:get("luci_global_log", "settings", "enable") or "1"
        _cache = (enabled == "1")
    end
    return _cache
end

-- 清除缓存（当通过UCI修改配置后需要调用）
function clear_cache()
    _cache = nil
end

-- 关键的"猴子补丁"：重写 nixio.syslog
local original_syslog = nixio.syslog
function patched_syslog(level, message)
    original_syslog("info", "[LogSwitch]:" ..tostring(is_log_enabled()))
    if is_log_enabled() then
        return original_syslog(level, message)
    end
    -- 如果日志被禁用，则静默丢弃日志消息
    return true -- 模拟成功调用
end

-- 提供一个函数来应用或移除补丁
function apply_patch()
    nixio.syslog = patched_syslog
    original_syslog("info", "LuCI全局日志补丁已应用，日志功能已" .. (is_log_enabled() and "启用" or "禁用"))
    original_syslog("info", "original_syslog==nixio.syslog:" ..tostring(original_syslog == nixio.syslog) )

end

function remove_patch()
    if original_syslog then
        nixio.syslog = original_syslog
        original_syslog("info", "LuCI全局日志补丁已移除")
    end
end

步骤3：在Luci初始化时加载并应用补丁

cat << "EOF" >> /etc/rc.local
# 等待系统服务就绪
sleep 5
# 加载并应用日志补丁
lua -e '
local ok, ls = pcall(require, "luci.log_switch")
if ok then
    ls.apply_patch()
    os.execute("logger -t luci-log-patch \"全局日志补丁在启动时应用成功\"")
else
    os.execute("logger -t luci-log-patch \"加载日志补丁模块失败: \" .. tostring(ls)")
end
'
exit 0
EOF
chmod +x /etc/rc.local

步骤4：增加controller，注册页面路由

-- luci\lua\luci\controller\admin\log_switch.lua
module("luci.controller.admin.log_switch", package.seeall)

function index()
    entry({"admin", "system", "log_switch"}, cbi("admin/log_switch"), _("全局日志开关"), 90)
end

步骤5：增加view，基于cbi实现页面

-- luci\lua\luci\model\cbi\admin\log_switch.lua
local m, s, o
m = Map("luci_global_log", "LuCI全局日志开关", 
        "此设置控制所有LuCI应用（及使用nixio.syslog的Lua代码）的日志输出。")

s = m:section(TypedSection, "global", translate("全局开关"))
s.anonymous = true

o = s:option(Flag, "enable", translate("启用全局日志"), translate("取消勾选将静默丢弃几乎所有来自LuCI的syslog日志。"))
o.default = "1"
o.disabled = "0"
o.enabled = "1"
o.rmempty = false

o = s:option(ListValue, "log_level", translate("日志级别"), translate("设置日志级别。"))
o:value("info", " 信息 ")
o:value("debug", " 调试 ")
o:value("warning", " 警告 ")
o:value("err", " 错误 ")
o:value("crit", " 关键 ")
o.default = "info"
o.rmempty = false
-- o.widget = "radio" -- 如果不指定 widget，则默认为select

function m.on_after_save(self)
    -- 重新加载模块以清除可能的内存缓存
    package.loaded["luci.log_switch"] = nil
    local ls = require "luci.log_switch"
    if ls then
        -- 重新应用补丁，确保使用最新的配置
        ls.apply_patch()
    end
    -- 可选的日志记录
    local nixio = require "nixio"
    local cursor = require "luci.model.uci".cursor()
    local enabled = cursor:get("luci_global_log", "settings", "enable") or "1"
    -- 下面这个日志其实已经看不到了，因为日志被禁用了
    nixio.syslog("info", "[LogSwitch] 配置已保存并重新应用补丁，状态:" .. (enabled == "1" and "启用" or "禁用"))
end

return m

步骤6：在之前的文件列表下载功能中增加日志功能

-- luci\lua\luci\controller\myapp\custom_file_downloader.lua
module("luci.controller.myapp.custom_file_downloader", package.seeall)

-- 新增：一个安全的日志函数，始终检查全局开关
local function my_log(level, message)
    -- 每次记录都实时读取UCI配置
    local cursor = require "luci.model.uci".cursor()
    local enabled = cursor:get("luci_global_log", "settings", "enable") or "1"

    if enabled == "1" then
        local nixio = require "nixio"
        nixio.syslog(level, "[FileDownloader] " .. message)
    end
    -- 如果enabled为"0"，则静默丢弃
end

function index()
    -- 在LuCI主菜单的"系统"下注册一个入口
    entry({"admin", "system", "file_download"}, firstchild(), _("文件下载"), 60).index = true

    -- 第一个子节点：显示文件列表页面
    entry({"admin", "system", "file_download", "list"}, template("custom_file_downloader/file_list"), _("文件列表"),
        1)

    -- 第二个子节点：处理文件下载的实际请求（这是一个调用函数，而非页面）
    entry({"admin", "system", "file_download", "download"}, call("download_file"))

    -- 新增：测试下载页面
    entry({"admin", "system", "file_download", "test"}, template("custom_file_downloader/test_download"),
        _("测试下载"), 3)

    -- 新增：处理/test.json文件的下载请求
    entry({"admin", "system", "file_download", "get_test_json"}, call("download_test_json"))
end

-- 替换旧的 get_file_list 函数
function get_file_list(directory)
    local fs = require "nixio.fs"
    local files = {}

    -- 使用 nixio.fs.dir 迭代目录
    for filename in fs.dir(directory) do
        if filename ~= "." and filename ~= ".." then
            local filepath = directory .. "/" .. filename
            local stat = fs.stat(filepath)
            if stat then
                table.insert(files, {
                    name = filename,
                    size = stat.size,
                    -- nixio.fs.stat 返回的 mtime 已经是时间戳
                    modtime = os.date("%Y-%m-%d %H:%M:%S", stat.mtime),
                    path = filepath
                })
            end
        end
    end
    table.sort(files, function(a, b)
        return a.name < b.name
    end)
    return files
end

-- 处理文件下载的Action函数
function download_file()
    my_log("info", "download_file 被调用")
    local fs = require "nixio.fs"
    local http = require "luci.http"
    local filepath = luci.http.formvalue("file") -- 从GET参数中获取文件路径

    my_log("info", "filepath: " .. filepath)

    -- **安全检查：确保文件路径在允许的范围内，防止目录遍历攻击**
    local allowed_dir = "/tmp" -- 只允许下载/tmp目录下的文件
    if not filepath or not filepath:find("^" .. allowed_dir) then
        http.status(403, "Forbidden")
        http.write("Access denied.")
        return
    end

    -- 检查文件是否存在且是普通文件
    if not fs.stat(filepath) or fs.stat(filepath).type ~= "reg" then
        http.status(404, "Not Found")
        http.write("File not found.")
        return
    end

    -- 获取文件名（去除路径）
    local filename = filepath:match("([^/]+)$")
    my_log("info", "filename: " .. filename)

    -- 设置HTTP响应头以触发下载
    http.header('Content-Disposition', 'attachment; filename="' .. filename .. '"')
    http.header('Content-Type', 'application/octet-stream')
    http.header('Content-Length', tostring(fs.stat(filepath).size))

    -- 以二进制块模式读取并发送文件内容
    local chunk_size = 4096 -- 或调整为 8192, 16384 以获得更好性能
    local fd = nixio.open(filepath, "r")
    if fd then
        local chunk = fd:read(chunk_size)
        while chunk do
            http.write(chunk)
            chunk = fd:read(chunk_size)
            my_log("info", "chunk:" .. chunk)
            if not chunk or #chunk == 0 then
                break
            end
        end
        -- 无论成功与否，都确保关闭文件描述符
        fd:close()

    end
    -- 简洁可靠的读取方式
    -- local fd = nixio.open(filepath, "r")

    -- if fd then
    --     -- 使用 pcall 捕获读取过程中可能发生的任何异常
    --     local ok, data_or_error = pcall(fd.readall, fd)
    --     nixio.syslog("info", "ok:" ..tostring(ok))
    --     nixio.syslog("info", "data:" ..data_or_error)

    --     -- 读取完成后立即关闭文件，释放资源
    --     fd:close()

    --     -- 根据读取结果处理  
    --     if ok and data_or_error then
    --         -- 成功读取到数据
    --         http.write(data_or_error)
    --         nixio.syslog("info", "data:" ..data_or_error)
    --     else
    --         -- 读取失败：ok为false时，data_or_error是错误信息；data_or_error为nil时是EOF。
    --         -- 可以选择记录日志或返回错误，但至少不会"卡住"
    --         -- 例如：http.status(500, "Read Error")
    --         nixio.syslog("info", "data:" .. data_or_error)
    --         http.write("读取文件时发生错误")
    --     end
    -- end
    -- 注意：这个函数不返回任何值，因为我们已经直接操作了HTTP响应流
    -- 使用nixio.fs.readfile 函数
    -- local data = nixio.fs.readfile(filepath)
    -- if data then
    --     http.write(data)
    --     nixio.syslog("info", "data:" .. data)
    -- else
    --     nixio.syslog("err", "读取文件失败: " .. filepath)
    --     http.status(500, "Read Error")
    --     http.write("读取文件时发生错误")
    -- end
end

-- 新增：专门下载 /tmp/.lastlog 文件 的函数
function download_test_json()
    local nixio = require "nixio"
    local fs = nixio.fs
    local http = require "luci.http"

    local filepath = "/tmp/.lastlog"

    -- 1. 更详细的文件检查
    local stat = fs.stat(filepath)
    if not stat then
        http.status(404, "Not Found")
        http.write("错误：文件不存在 - " .. filepath)
        return
    end
    if stat.type ~= "reg" then
        http.status(400, "Bad Request")
        http.write("错误：目标不是常规文件 - " .. filepath)
        return
    end

    -- 2. (可选) 增加文件大小检查，避免大文件耗尽内存
    local max_size_allowed = 1024 * 1024 * 10 -- 例如10MB
    if stat.size > max_size_allowed then
        http.status(413, "File Too Large")
        http.write("错误：文件超过大小限制 (" .. max_size_allowed .. " bytes)")
        return
    end

    -- 3. 设置HTTP响应头
    http.header('Content-Disposition', 'attachment; filename="lastlog"')
    http.header('Content-Type', 'application/json')
    http.header('Content-Length', tostring(stat.size))

    -- 4. 使用 readall() 读取并发送（你的核心修正）
    local fd = nixio.open(filepath, "r")
    if fd then
        -- 使用 pcall 安全地调用 readall，捕获可能的读取错误
        local ok, data = pcall(fd.readall, fd)
        fd:close() -- 确保文件描述符被关闭

        if ok and data then
            http.write(data)
        else
            http.status(500, "Internal Server Error")
            http.write("错误：读取文件失败")
        end
    else
        http.status(500, "Internal Server Error")
        http.write("错误：无法打开文件")
    end
end

步骤7：测试与验证

1. 访问LuCI界面，进入"系统"->"日志"->"全局日志"。
2. 切换开关状态并观察：通过logread -f命令实时查看。关闭日志后，所有Luci操作（如点击菜单）产生的user.info.lua:日志应大幅减少或消失。
3. 测试应用：操作文件下载模块，验证日志是否随开关控制。

开启后，并操作文件下载模块，查看日志：

root@Eboy:~# logread -f
Tue Dec 30 03:33:49 2025 user.info lua: luci: accepted login on /admin/system/log_switch for root from 10.1.80.225
Tue Dec 30 03:33:52 2025 user.info lua: LuCI全局日志补丁已应用，日志功能已启用
Tue Dec 30 03:33:52 2025 user.info lua: original_syslog==nixio.syslog:false
Tue Dec 30 03:33:52 2025 user.info lua: [LogSwitch]:true
Tue Dec 30 03:33:52 2025 user.info lua: [LogSwitch] 配置已保存并重新应用补丁，状态:启用
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] download_file 被调用
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] filepath: /tmp/.lastlog
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] filename: .lastlog
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:.803577] 001: [XRADIO] Allocated hw_priv @ (ptrval) Mon Dec 29 17:13:32 2025 kern.err kernel: [   11.989943] 001: [XRADIO] Detect SDIO card 0 Mon Dec 29 17:13:32 2025 daemon.info dnsmasq[2611]: Connected to system UBus Mon Dec 29 17:13:32 2025 daemon.info dnsmasq[2611]: started, version 2.85 cachesize 10000 Mon Dec 29 17:13:32 2025 daemon.info dnsmasq[2611]: compile time options: IPv6 GNU-getopt no-DBus UBus no-i18n no-IDN DHCP no-DHCPv6 no-Lua TFTP no-conntrack no-ipset no-auth no-cryptohash no-DNSSEC no-ID loop-detect inotify dumpfile Mon Dec 29 17:13:32 2025 daemon.info dnsmasq[2611]: UBus support enabled: connected to system bus Mon Dec 29 17:13:32 2025 daemon.warn dnsmasq[2611]: warning: interface p2p-wlan0-0 does not currently exist Mon Dec 29 17:13:32 2025 daemon.warn dnsmasq[2611]: warning: interface wlan0 does not currently exist Mon Dec 29 17:13:32 2025 daemon.info dnsmasq-dhcp[2611]: DHCP, IP range 192.168.6.2 -- 192.168.6.255, lease time 1h Mon Dec
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:s-gadget 4100000.udc-controller: failed to start g1: -19 Tue Dec 30 01:13:37 2025 daemon.err nmbd[2587]: [2025/12/30 01:13:37.641032,  0] ../../source3/lib/interface.c:662(load_interfaces) Tue Dec 30 01:13:37 2025 daemon.info avahi-daemon[2962]: Joining mDNS multicast group on interface lo.IPv4 with address 127.0.0.1. Tue Dec 30 01:13:37 2025 daemon.info avahi-daemon[2962]: New relevant interface lo.IPv4 for mDNS. Tue Dec 30 01:13:37 2025 daemon.info avahi-daemon[2962]: Registering new address record for 127.0.0.1 on lo.IPv4. Tue Dec 30 01:13:37 2025 daemon.info avahi-daemon[2962]: Joining mDNS multicast group on interface lo.IPv6 with address ::1. Tue Dec 30 01:13:37 2025 daemon.info avahi-daemon[2962]: New relevant interface lo.IPv6 for mDNS. Tue Dec 30 01:13:37 2025 daemon.info avahi-daemon[2962]: Registering new address record for ::1 on lo.*. Tue Dec 30 01:13:37 2025 daemon.notice netifd: Interface 'loopback' is enabled Tue Dec 30 01:13:37 2025 daemon.noti
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:ne: Tue Dec 30 01:13:38 2025 daemon.notice procd: /etc/rc.d/S95done: amixer: Cannot find the given element from control hw:audiocodec Tue Dec 30 01:13:38 2025 daemon.notice procd: /etc/rc.d/S95done: Tue Dec 30 01:13:38 2025 daemon.notice procd: /etc/rc.d/S95done: amixer: Cannot find the given element from control hw:audiocodec Tue Dec 30 01:13:38 2025 daemon.notice procd: /etc/rc.d/S95done: Tue Dec 30 01:13:38 2025 daemon.notice procd: /etc/rc.d/S95done: amixer: Cannot find the given element from control hw:audiocodec Tue Dec 30 01:13:38 2025 daemon.notice procd: /etc/rc.d/S95done: Tue Dec 30 01:13:38 2025 daemon.notice procd: /etc/rc.d/S95done: amixer: Cannot find the given element from control hw:audiocodec Tue Dec 30 01:13:38 2025 daemon.notice procd: /etc/rc.d/S95done: Tue Dec 30 01:13:38 2025 daemon.notice procd: /etc/rc.d/S95done: amixer: Cannot find the given element from control hw:audiocodec Tue Dec 30 01:13:38 2025 daemon.notice procd: /etc/rc.d/S95do
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:727]: [2025/12/30 01:13:43.577359,  0] ../../lib/util/become_daemon.c:136(daemon_ready) Tue Dec 30 01:13:43 2025 daemon.err nmbd[3727]:   daemon_ready: daemon 'nmbd' finished starting up and ready to serve connections Tue Dec 30 01:13:43 2025 daemon.err nmbd[3727]: [2025/12/30 01:13:43.581474,  0] ../../source3/nmbd/nmbd_namequery.c:109(query_name_response) Tue Dec 30 01:13:43 2025 daemon.err nmbd[3727]:   query_name_response: Multiple (2) responses received for a query on subnet 10.1.80.229 for name WORKGROUP<1d>. Tue Dec 30 01:13:43 2025 daemon.err nmbd[3727]:   This response was from IP 10.1.80.226, reporting an IP address of 10.1.80.226. Tue Dec 30 01:13:43 2025 daemon.notice procd: /etc/rc.d/S95done: sh: syntax error: unexpected "(" Tue Dec 30 01:13:43 2025 daemon.info procd: - init complete - Tue Dec 30 01:13:44 2025 daemon.err nmbd[3727]: [2025/12/30 01:13:44.009390,  0] ../../source3/nmbd/nmbd_mynames.c:36(my_name_register_failed) Tue Dec 30 01:13:44 20
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:ile time options: IPv6 GNU-getopt no-DBus UBus no-i18n no-IDN DHCP no-DHCPv6 no-Lua TFTP no-conntrack no-ipset no-auth no-cryptohash no-DNSSEC no-ID loop-detect inotify dumpfile Mon Dec 29 17:13:32 2025 daemon.info dnsmasq[2611]: UBus support enabled: connected to system bus Mon Dec 29 17:13:32 2025 daemon.warn dnsmasq[2611]: warning: interface p2p-wlan0-0 does not currently exist Mon Dec 29 17:13:32 2025 daemon.warn dnsmasq[2611]: warning: interface wlan0 does not currently exist Mon Dec 29 17:13:32 2025 daemon.info dnsmasq-dhcp[2611]: DHCP, IP range 192.168.6.2 -- 192.168.6.255, lease time 1h Mon Dec Tue Dec 30 01:17:23 2025 user.info lua: [FileDownloader] chunk:s-gadget 4100000.udc-controller: failed to start g1: -19 Tue Dec 30 01:13:37 2025 daemon.err nmbd[2587]: [2025/12/30 01:13:37.641032,  0] ../../source3/lib/interface.c:662(load_interfaces) Tue Dec 30 01:13:37 2025 daemon.info avahi-daemon[2962]: Joining mDNS multicast group on interface lo.IPv4 with a
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:n.warn dnsmasq[2611]: warning: interface p2p-wlan0-0 does not currently exist Mon Dec 29 17:13:32 2025 daemon.warn dnsmasq[2611]: warning: interface wlan0 does not currently exist Mon Dec 29 17:13:32 2025 daemon.info dnsmasq-dhcp[2611]: DHCP, IP range 192.168.6.2 -- 192.168.6.255, lease time 1h Mon Dec Tue Dec 30 01:17:23 2025 user.info lua: [FileDownloader] chunk:s-gadget 4100000.udc-controller: failed to start g1: -19 Tue Dec 30 01:13:37 2025 daemon.err nmbd[2587]: [2025/12/30 01:13:37.641032,  0] ../../source3/lib/interface.c:662(load_interfaces) Tue Dec 30 01:13:37 2025 daemon.info avahi-daemon[2962]: Joining mDNS multicast group on interface lo.IPv4 with a Tue Dec 30 01:17:23 2025 user.info lua: [FileDownloader] chunk:Tue Dec 30 01:17:23 2025 user.info lua: [FileDownloader] chunk:727]: [2025/12/30 01:13:43.577359,  0] ../../lib/util/become_daemon.c:136(daemon_ready) Tue Dec 30 01:13:43 2025 daemon.err nmbd[3727]:   daemon_ready: daemon 'nmbd' finished star
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:lua: luci: accepted login on /admin/system/log_switch for root from 10.1.80.225 Tue Dec 30 03:33:52 2025 user.info lua: LuCI全局日志补丁已应用，日志功能已启用 Tue Dec 30 03:33:52 2025 user.info lua: original_syslog==nixio.syslog:false Tue Dec 30 03:33:52 2025 user.info lua: [LogSwitch]:true Tue Dec 30 03:33:52 2025 user.info lua: [LogSwitch] 配置已保存并重新应用补丁，状态:启用 Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] download_file 被调用 Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] filepath: /tmp/.lastlog Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] filename: .lastlog Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:.803577] 001: [XRADIO] Allocated hw_priv @ (ptrval) Mon Dec 29 17:13:32 2025 kern.err kernel: [   11.989943] 001: [XRADIO] Detect SDIO card 0 Mon Dec 29 17:13:32 2025 daemon.info dnsmasq[2611]: Connected to system UBus Mon Dec 29 17:13:32 2025 daemon.info dnsm
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk: [2025/12/30 01:13:43.581474,  0] ../../source3/nmbd/nmbd_namequery.c:109(query_name_response) Tue Dec 30 01:13:43 2025 daemon.err nmbd[3727]:   query_name_response: Multiple (2) responses received for a query on subnet 10.1.80.229 for name WORKGROUP<1d>. Tue Dec 30 01:13:43 2025 daemon.err nmbd[3727]:   This response was from IP 10.1.80.226, reporting an IP address of 10.1.80.226. Tue Dec 30 01:13:43 2025 daemon.notice procd: /etc/rc.d/S95done: sh: syntax error: unexpected "(" Tue Dec 30 01:13:43 2025 daemon.info procd: - init complete - Tue Dec 30 01:13:44 2025 daemon.err nmbd[3727]: [2025/12/30 01:13:44.009390,  0] ../../source3/nmbd/nmbd_mynames.c:36(my_name_register_failed) Tue Dec 30 01:13:44 20 Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:ile time options: IPv6 GNU-getopt no-DBus UBus no-i18n no-IDN DHCP no-DHCPv6 no-Lua TFTP no-conntrack no-ipset no-auth no-cryptohash no-DNSSEC no-ID loop-detect inotify dumpfile Mon Dec 29 17:13:32 202
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:lua: luci: accepted login on /admin/system/log_switch for root from 10.1.80.225 Tue Dec 30 03:33:52 2025 user.info lua: LuCI全局日志补丁已应用，日志功能已启用 Tue Dec 30 03:33:52 2025 user.info lua: original_syslog==nixio.syslog:false Tue Dec 30 03:33:52 2025 user.info lua: [LogSwitch]:true Tue Dec 30 03:33:52 2025 user.info lua: [LogSwitch] 配置已保存并重新应用补丁，状态:启用 Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] download_file 被调用 Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] filepath: /tmp/.lastlog Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] filename: .lastlog Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:.803577] 001: [XRADIO] Allocated hw_priv @ (ptrval) Mon Dec 29 17:13:32 2025 kern.err kernel: [   11.989943] 001: [XRADIO] Detect SDIO card 0 Mon Dec 29 17:13:32 2025 daemon.info dnsmasq[2611]: Con
Tue Dec 30 03:34:18 2025 user.info lua: [FileDownloader] chunk:

关闭后，操作文件下载模块，查看日志：

Tue Dec 30 03:35:27 2025 user.info lua: LuCI全局日志补丁已应用，日志功能已禁用
Tue Dec 30 03:35:27 2025 user.info lua: original_syslog==nixio.syslog:false
Tue Dec 30 03:35:27 2025 user.info lua: [LogSwitch]:false

可见用户应用日志已消失。