c++ - Boost 记录器追加到文件

Question

我已经初始化了记录到文件的接收器:

logging::add_file_log
            (
            keywords::file_name = "sample_%N.log",                                        /*< file name pattern >*/
            keywords::rotation_size = 10 * 1024 * 1024,                                   /*< rotate files every 10 MiB... >*/
            keywords::time_based_rotation = sinks::file::rotation_at_time_point(0, 0, 0), /*< ...or at midnight >*/
            keywords::format = "[%TimeStamp%]: %Message%",                                 /*< log record format >*/
            keywords::auto_flush = true
            );

它看起来在程序重新启动期间重写了文件。如何让它附加到文件？

Answer 1

文档说

open_mode The mask that describes the open mode for the file. See std::ios_base::openmode.

append 的打开模式 keywords::open_mode 是 std::ios_base::app，所以看起来你需要添加它。