Function
GLiblog_writer_default
since: 2.50
Declaration [src]
GLogWriterOutput
g_log_writer_default (
GLogLevelFlags log_level,
const GLogField* fields,
gsize n_fields,
gpointer user_data
)
Description [src]
Format a structured log message and output it to the default log destination for the platform.
On Linux, this is typically the systemd journal, falling
back to stdout
or stderr
if running from the terminal or if output is
being redirected to a file.
Support for other platform-specific logging mechanisms may be added in future. Distributors of GLib may modify this function to impose their own (documented) platform-specific log writing policies.
This is suitable for use as a GLogWriterFunc
, and is the default writer used
if no other is set using g_log_set_writer_func()
.
As with g_log_default_handler()
, this function drops debug and informational
messages unless their log domain (or all
) is listed in the space-separated
G_MESSAGES_DEBUG
environment variable, or set at runtime by g_log_writer_default_set_debug_domains()
.
g_log_writer_default()
uses the mask set by g_log_set_always_fatal()
to
determine which messages are fatal. When using a custom writer function instead it is
up to the writer function to determine which log messages are fatal.
Available since: 2.50
Parameters
log_level
-
Type:
GLogLevelFlags
Log level, either from
GLogLevelFlags
, or a user-defined level. fields
-
Type: An array of
GLogField
Key–value pairs of structured data forming the log message.
The length of the array is specified in the n_fields
argument.The data is owned by the caller of the function. n_fields
-
Type:
gsize
Number of elements in the
fields
array. user_data
-
Type:
gpointer
User data passed to
g_log_set_writer_func()
.The argument can be NULL
.The data is owned by the caller of the function.
Return value
Type: GLogWriterOutput
G_LOG_WRITER_HANDLED
on success,
G_LOG_WRITER_UNHANDLED
otherwise.