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Erlang rb 模块

发布于 2024-08-29 12:50:26 字数 107 浏览 4 评论 0原文

当使用 rb:list() 或 rb:show() 查找 sasl 日志中的消息时，rb 似乎将输出转储到控制台中并返回“ok”；有没有办法配置 rb 以使其返回实际的日志消息？

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很糊涂小朋友 2024-09-05 12:50:26

我一直在使用以下函数，它将日志转储到临时文件并读取该文件：

get_logs(LogDir) ->
    TmpFile = lists:flatten(io_lib:format("log_tmp_~B_~B_~B", tuple_to_list(now()))),
    try
        % Make the report browser write logs to a temporary file.
        % We use rb:start_link instead of rb:start, to not depend on the sasl
        % application being started.
        {ok, _} = rb:start_link([{start_log, TmpFile},
                                 {report_dir, LogDir}]),
        rb:show(),
        % We catch errors from stopping, since we're going to get one
        % if sasl isn't started.  (UTSL)
        catch rb:stop(),
        % Ouch... let's hope the logs fit in memory.
        case file:read_file(TmpFile) of
            {ok, Logs} ->
                Logs;
            {error, Error} ->
                io_lib:format("Couldn't read logs: ~p", [Error])
        end
    catch _:E ->
            io_lib:format("Couldn't read logs: ~p", [E])
    after
        file:delete(TmpFile)
    end.

I've been using the following function, which dumps the logs to a temporary file and reads that file:

get_logs(LogDir) ->
    TmpFile = lists:flatten(io_lib:format("log_tmp_~B_~B_~B", tuple_to_list(now()))),
    try
        % Make the report browser write logs to a temporary file.
        % We use rb:start_link instead of rb:start, to not depend on the sasl
        % application being started.
        {ok, _} = rb:start_link([{start_log, TmpFile},
                                 {report_dir, LogDir}]),
        rb:show(),
        % We catch errors from stopping, since we're going to get one
        % if sasl isn't started.  (UTSL)
        catch rb:stop(),
        % Ouch... let's hope the logs fit in memory.
        case file:read_file(TmpFile) of
            {ok, Logs} ->
                Logs;
            {error, Error} ->
                io_lib:format("Couldn't read logs: ~p", [Error])
        end
    catch _:E ->
            io_lib:format("Couldn't read logs: ~p", [E])
    after
        file:delete(TmpFile)
    end.

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