#include <evlog.h> int log_facilityaddset( log_facility_set_t *set, log_facility_t facilityno );
A successful call to log_facilityaddset()
returns a value of zero
and a unsuccessful call returns the errno
.
set
argument is an invalid pointer.
facilityno
argument is not a valid facility.
The log_facilityaddset()
function adds the individual
facility specified by the value of the argument facilityno
to the facility set pointed to by the argument set
.
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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