#include <evlog.h> int log_facilityemptyset( log_facility_set_t *set );
A successful call to log_facilityemptyset()
returns a value of zero
and a unsuccessful call returns the errno
.
set
argument is an invalid pointer.
The log_facilityemptyset()
function initializes the facility
set pointed to by the argument set
, such that all facilities
are excluded.
The _POSIX_LOGGING
feature flag is defined to indicate
this service is available.
Applications shall call either log_facilityemptyset()
or
log_facilityfillset()
at least once for each object of type
log_facilityset_t
prior to any other use of that object. If
such an object is not initialized in this way, but is nonetheless
supplied as an argument to any of the log_facilityaddset()
,
logfacilitydelset()
, log_facilityismember()
or
log_open()
functions, the results are undefined.
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