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I'm planning to package OpenTibia Server for Debian. One of the things I want to do is add startup via /etc/init.d and daemonization of the otserv process.
Thing is, we should probably redirect output to syslog. This is usually done via the syslog() function. Currently, the code is swarmed with:
std::cout << "Stuff to printout" << std::endl;
Is there a proper, easy to add, way to redirect standard output and standard error output into syslog without replacing every single "call" to std::cout and friends?
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The regular output is sent to Standard Out (STDOUT) and the error messages are sent to Standard Error (STDERR). When you redirect console output using the > symbol, you are only redirecting STDOUT. In order to redirect STDERR, you have to specify 2> for the redirection symbol.
Understanding the concept of redirections and file descriptors is very important when working on the command line. To redirect stderr and stdout , use the 2>&1 or &> constructs.
Original Answer By default stdout and stderr of a systemd unit are sent to syslog.
You can pipe your stdout to syslog with the logger command:
NAME
logger - a shell command interface to the syslog(3) system log moduleSYNOPSIS
logger [-isd] [-f file] [-p pri] [-t tag] [-u socket] [message ...]DESCRIPTION
Logger makes entries in the system log. It provides a shell command interface to the syslog(3) system log module.
If you don't supply a message on the command line it reads stdin
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