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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 /*
     28  * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T
     29  * All Rights Reserved
     30  *
     31  * Portions of this source code were derived from Berkeley
     32  * 4.3 BSD under license from the regents of the University of
     33  * California.
     34  */
     35 
     36 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     37 
     38 #include "lint.h"
     39 
     40 #include <sys/time.h>
     41 #include <sys/resource.h>
     42 #include <sys/types.h>
     43 #include <limits.h>
     44 /*
     45  * getdtablesize is implemented on top of getrlimit's
     46  * RLIMIT_NOFILE feature. The current (Soft) limit is returned.
     47  */
     48 int
     49 getdtablesize(void)
     50 {
     51 	struct rlimit rip;
     52 
     53 	if (getrlimit(RLIMIT_NOFILE, &rip) == -1)
     54 		return (-1);	/* can't happen */
     55 	if (rip.rlim_cur == RLIM_INFINITY)
     56 		return (INT_MAX);
     57 	return ((int)rip.rlim_cur);
     58 }
     59