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
