c - 使用 syslog 时禁用/启用日志记录

Question

我打算使用系统日志记录应用程序。我需要能够在编译时禁用日志记录，或许可以使用宏。这可能与 syslog 设施有关，还是我需要将 syslog 包装在我自己的宏/函数中？能够根据日志消息的优先级禁用/启用日志消息是一个优势。

Answer 1

也许您可以将调用包装到 setlogmask在定义 block 中。

setlogmask sets a mask (the “logmask”) that determines which future syslog calls shall be ignored. If a program has not called setlogmask, syslog doesn't ignore any calls. You can use setlogmask to specify that messages of particular priorities shall be ignored in the future.

像这样:

#ifdef LOG_LEVEL1
setlogmask (LOG_UPTO (LOG_NOTICE));
#endif
#ifdef LOG_LEVEL2
setlogmask (LOG_UPTO (LOG_WARNING));
#endif