1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)fdset.h 8.1 (Berkeley) 06/06/93 8 */ 9 10 /* 11 * The following is defined just in case someone should want to run 12 * this telnet on a 4.2 system. 13 * 14 */ 15 16 #ifndef FD_SETSIZE 17 18 #define FD_SET(n, p) ((p)->fds_bits[0] |= (1<<(n))) 19 #define FD_CLR(n, p) ((p)->fds_bits[0] &= ~(1<<(n))) 20 #define FD_ISSET(n, p) ((p)->fds_bits[0] & (1<<(n))) 21 #define FD_ZERO(p) ((p)->fds_bits[0] = 0) 22 23 #endif 24