UNKNOWN
#define UNKNOWN -2 /* grouplen, if cached cred is unknown user */
enum { UNKNOWN, AVAIL, EMPTY, FULL } state;
#define UNKNOWN 3 /* disposition or starting point is unknown */
# define UNKNOWN(value) \
# define UNKNOWN(x) ((void)0)
UNKNOWN, /* priority is totally unknown */
#define UNKNOWN "unknown"
#define UNKNOWN -2 /* -2 means not set yet */