MessageLog.logSetHandler

Sets the log handler for a domain and a set of log levels. To handle fatal and recursive messages the log_levels parameter must be combined with the G_LOG_FLAG_FATAL and G_LOG_FLAG_RECURSION bit flags.

Note that since the G_LOG_LEVEL_ERROR log level is always fatal, if you want to set a handler for this log level you must combine it with G_LOG_FLAG_FATAL

This has no effect if structured logging is enabled; see [Using Structured Logging][using-structured-logging].

Here is an example for adding a log handler for all warning messages in the default domain:

g_log_set_handler (NULL, G_LOG_LEVEL_WARNING | G_LOG_FLAG_FATAL
| G_LOG_FLAG_RECURSION, my_log_handler, NULL);

This example adds a log handler for all critical messages from GTK+:

g_log_set_handler ("Gtk", G_LOG_LEVEL_CRITICAL | G_LOG_FLAG_FATAL
| G_LOG_FLAG_RECURSION, my_log_handler, NULL);

This example adds a log handler for all messages from GLib:

g_log_set_handler ("GLib", G_LOG_LEVEL_MASK | G_LOG_FLAG_FATAL
| G_LOG_FLAG_RECURSION, my_log_handler, NULL);