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: |[<!-- language="C" --> 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+: |[<!-- language="C" --> 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: |[<!-- language="C" --> g_log_set_handler ("GLib", G_LOG_LEVEL_MASK | G_LOG_FLAG_FATAL | G_LOG_FLAG_RECURSION, my_log_handler, NULL); ]|

struct MessageLog
static
uint
logSetHandler

Parameters

logDomain string

the log domain, or %NULL for the default "" application domain

logLevels GLogLevelFlags

the log levels to apply the log handler for. To handle fatal and recursive messages as well, combine the log levels with the #G_LOG_FLAG_FATAL and #G_LOG_FLAG_RECURSION bit flags.

logFunc GLogFunc

the log handler function

userData void*

data passed to the log handler

Return: the id of the new handler

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