mojave man page for os_log_create

os_log_create(3)					   BSD Library Functions Manual 					  os_log_create(3)

NAME
     os_log_create -- create an object that tracks the state of logging for a given system.

SYNOPSIS
     #include <os/log.h>

     os_log_t
     os_log_create(const char *subsystem, const char *category);

DESCRIPTION
     Use os_log_create to create an object that can be passed to os_log(3) calls.  Log messages to this object will be marked with the object's
     subsystem and category name.  The behavior of log messages to this object can be configured using the log(1) command.

EXAMPLES
     Create a new os_log_t object and log a message:

	   #include <os/log.h>

	   /* create a log object for the subsystem, specifically the "connections" category" */
	   os_log_t log = os_log_create("com.example.widget", "connections");

	   /* log a connection related message */
	   os_log(log, "connection state changed: %d interface: %s", if, interface);

SEE ALSO
     log(1), os_log(3)

Darwin								   June 1, 2019 							    Darwin