usr/src/lib/libproc/common/pr_getrlimit.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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1997-2000 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #include <stdlib.h>
  28 #include <unistd.h>
  29 #include <errno.h>
  30 #include <sys/resource.h>
  31 #include "libproc.h"
  32
  33 /*
  34  * getrlimit() system call -- executed by subject process.
  35  */
  36 int
  37 pr_getrlimit(struct ps_prochandle *Pr,
  38         int resource, struct rlimit *rlp)
  39 {
  40         sysret_t rval;                  /* return value from getrlimit() */
  41         argdes_t argd[2];               /* arg descriptors for getrlimit() */
  42         argdes_t *adp;
  43         int sysnum;
  44         int error;
  45
  46         if (Pr == NULL)         /* no subject process */
  47                 return (getrlimit(resource, rlp));
  48
  49         adp = &argd[0];         /* resource argument */
  50         adp->arg_value = resource;
  51         adp->arg_object = NULL;
  52         adp->arg_type = AT_BYVAL;
  53         adp->arg_inout = AI_INPUT;
  54         adp->arg_size = 0;
  55
  56         adp++;                  /* rlp argument */
  57         adp->arg_value = 0;
  58         adp->arg_object = rlp;
  59         adp->arg_type = AT_BYREF;
  60         adp->arg_inout = AI_OUTPUT;
  61         adp->arg_size = sizeof (*rlp);
  62
  63         sysnum = SYS_getrlimit;
  64
  65         error = Psyscall(Pr, &rval, sysnum, 2, &argd[0]);
  66
  67         if (error) {
  68                 errno = (error > 0)? error : ENOSYS;
  69                 return (-1);
  70         }
  71         return (rval.sys_rval1);
  72 }
  73
  74 /*
  75  * setrlimit() system call -- executed by subject process.
  76  */
  77 int
  78 pr_setrlimit(struct ps_prochandle *Pr,
  79         int resource, const struct rlimit *rlp)
  80 {
  81         sysret_t rval;                  /* return value from setrlimit() */
  82         argdes_t argd[2];               /* arg descriptors for setrlimit() */
  83         argdes_t *adp;
  84         int sysnum;
  85         int error;
  86
  87         if (Pr == NULL)         /* no subject process */
  88                 return (setrlimit(resource, rlp));
  89
  90         adp = &argd[0];         /* resource argument */
  91         adp->arg_value = resource;
  92         adp->arg_object = NULL;
  93         adp->arg_type = AT_BYVAL;
  94         adp->arg_inout = AI_INPUT;
  95         adp->arg_size = 0;
  96
  97         adp++;                  /* rlp argument */
  98         adp->arg_value = 0;
  99         adp->arg_object = (void *)rlp;
 100         adp->arg_type = AT_BYREF;
 101         adp->arg_inout = AI_INPUT;
 102         adp->arg_size = sizeof (*rlp);
 103
 104         sysnum = SYS_setrlimit;
 105
 106         error = Psyscall(Pr, &rval, sysnum, 2, &argd[0]);
 107
 108         if (error) {
 109                 errno = (error > 0)? error : ENOSYS;
 110                 return (-1);
 111         }
 112         return (rval.sys_rval1);
 113 }