usr/src/lib/libc/port/gen/getrusage.c

   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 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * Portions of this source code were derived from Berkeley 4.3 BSD
  32  * under license from the Regents of the University of California.
  33  */
  34
  35 #pragma ident   "%Z%%M% %I%     %E% SMI"
  36
  37 /*
  38  * Compatibility lib for BSD's getrusgae(). Only the
  39  * CPU time usage is supported for RUSAGE_CHILDREN, and hence does not
  40  * fully support BSD's rusage semantics.
  41  */
  42
  43 #include "lint.h"
  44 #include <sys/types.h>
  45 #include <sys/time.h>
  46 #include <sys/times.h>
  47 #include <stdio.h>
  48 #include <sys/param.h>
  49 #include <errno.h>
  50 #include <sys/resource.h>
  51 #include <sys/vm_usage.h>
  52 #include <fcntl.h>
  53 #include <sys/fcntl.h>
  54 #include <procfs.h>
  55 #include <string.h>
  56 #include <unistd.h>
  57
  58 int __rusagesys(int, struct rusage *);
  59
  60 int
  61 getrusage(int who, struct rusage *rusage)
  62 {
  63         switch (who) {
  64
  65         case RUSAGE_SELF:
  66                 return (__rusagesys(_RUSAGESYS_GETRUSAGE, rusage));
  67
  68         case RUSAGE_LWP:
  69                 return (__rusagesys(_RUSAGESYS_GETRUSAGE_LWP, rusage));
  70
  71         case RUSAGE_CHILDREN:
  72                 return (__rusagesys(_RUSAGESYS_GETRUSAGE_CHLD, rusage));
  73
  74         default:
  75                 errno = EINVAL;
  76                 return (-1);
  77         }
  78 }
  79
  80 int
  81 getvmusage(uint_t flags, time_t age, vmusage_t *buf, size_t *nres)
  82 {
  83         return (syscall(SYS_rusagesys, _RUSAGESYS_GETVMUSAGE, flags, age,
  84             buf, nres));
  85 }