Redirect C++ std::clog to syslog on Unix
- by kriss
I work on Unix on a C++ program that send messages to syslog.
The current code uses the syslog system call that works like printf.
Now I would prefer to use a stream for that purpose instead, typically the built-in std::clog. But clog merely redirect output to stderr, not to syslog and that is useless for me as I also use stderr and stdout for other purposes.
I've seen in another answer that it's quite easy to redirect it to a file using rdbuf() but I see no way to apply that method to call syslog as openlog does not return a file handler I could use to tie a stream on it.
Is there another method to do that ? (looks pretty basic for unix programming) ?
Edit: I'm looking for a solution that does not use external library. What @Chris is proposing could be a good start but is still a bit vague to become the accepted answer.
Edit: using Boost.IOStreams is OK as my project already use Boost anyway.
Linking with external library is possible but is also a concern as it's GPL code. Dependencies are also a burden as they may conflict with other components, not be available on my Linux distribution, introduce third-party bugs, etc. If this is the only solution I may consider completely avoiding streams... (a pity).
