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rpc_dtablesize.c revision 1.2 
      1 /*
      2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
      3  * unrestricted use provided that this legend is included on all tape
      4  * media and as a part of the software program in whole or part.  Users
      5  * may copy or modify Sun RPC without charge, but are not authorized
      6  * to license or distribute it to anyone else except as part of a product or
      7  * program developed by the user.
      8  *
      9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
     10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
     11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
     12  *
     13  * Sun RPC is provided with no support and without any obligation on the
     14  * part of Sun Microsystems, Inc. to assist in its use, correction,
     15  * modification or enhancement.
     16  *
     17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
     18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
     19  * OR ANY PART THEREOF.
     20  *
     21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
     22  * or profits or other special, indirect and consequential damages, even if
     23  * Sun has been advised of the possibility of such damages.
     24  *
     25  * Sun Microsystems, Inc.
     26  * 2550 Garcia Avenue
     27  * Mountain View, California  94043
     28  */
     29 
     30 #if defined(LIBC_SCCS) && !defined(lint)
     31 /*static char *sccsid = "from: @(#)rpc_dtablesize.c 1.2 87/08/11 Copyr 1987 Sun Micro";*/
     32 /*static char *sccsid = "from: @(#)rpc_dtablesize.c	2.1 88/07/29 4.0 RPCSRC";*/
     33 static char *rcsid = "$Id: rpc_dtablesize.c,v 1.2 1994/08/15 07:56:50 andrew Exp $";
     34 #endif
     35 
     36 #include <sys/types.h>
     37 
     38 /*
     39  * Cache the result of getdtablesize(), so we don't have to do an
     40  * expensive system call every time.
     41  */
     42 _rpc_dtablesize()
     43 {
     44 	static int size;
     45 
     46 	if (size == 0) {
     47 		size = getdtablesize();
     48 #ifdef FD_SETSIZE
     49 		/* prevent select() from breaking */
     50 		if (size > FD_SETSIZE)
     51 			size = FD_SETSIZE;
     52 #endif
     53 	}
     54 	return (size);
     55 }
     56