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rpc_dtablesize.c revision 1.5 
      1 /*	$NetBSD: rpc_dtablesize.c,v 1.5 1996/12/17 03:27:08 mrg Exp $	*/
      2 
      3 /*
      4  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
      5  * unrestricted use provided that this legend is included on all tape
      6  * media and as a part of the software program in whole or part.  Users
      7  * may copy or modify Sun RPC without charge, but are not authorized
      8  * to license or distribute it to anyone else except as part of a product or
      9  * program developed by the user.
     10  *
     11  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
     12  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
     13  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
     14  *
     15  * Sun RPC is provided with no support and without any obligation on the
     16  * part of Sun Microsystems, Inc. to assist in its use, correction,
     17  * modification or enhancement.
     18  *
     19  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
     20  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
     21  * OR ANY PART THEREOF.
     22  *
     23  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
     24  * or profits or other special, indirect and consequential damages, even if
     25  * Sun has been advised of the possibility of such damages.
     26  *
     27  * Sun Microsystems, Inc.
     28  * 2550 Garcia Avenue
     29  * Mountain View, California  94043
     30  */
     31 
     32 #if defined(LIBC_SCCS) && !defined(lint)
     33 /*static char *sccsid = "from: @(#)rpc_dtablesize.c 1.2 87/08/11 Copyr 1987 Sun Micro";*/
     34 /*static char *sccsid = "from: @(#)rpc_dtablesize.c	2.1 88/07/29 4.0 RPCSRC";*/
     35 static char *rcsid = "$NetBSD: rpc_dtablesize.c,v 1.5 1996/12/17 03:27:08 mrg Exp $";
     36 #endif
     37 
     38 #include <sys/param.h>
     39 #include <sys/sysctl.h>
     40 
     41 /*
     42  * Cache the result of getdtablesize(), so we don't have to do an
     43  * expensive system call every time.
     44  */
     45 int
     46 _rpc_dtablesize()
     47 {
     48 	static int size;
     49 	int mib[2], len;
     50 
     51 	if (size == 0) {
     52 		mib[0] = CTL_KERN;
     53 		mib[1] = KERN_MAXFILES;
     54 		len = sizeof size;
     55 		sysctl(mib, 2, &size, &len, NULL, 0);
     56 	}
     57 	return (size);
     58 }
     59