sysdeps/mach/hurd/setrlimit.c

   1 /* Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <hurd.h>
  20 #include <hurd/resource.h>
  21 #include <errno.h>
  22 #include <hurd/fd.h>
  23
  24
  25 /* Set the soft and hard limits for RESOURCE to *RLIMITS.
  26    Only the super-user can increase hard limits.
  27    Return 0 if successful, -1 if not (and sets errno).  */
  28 /* XXX should be __setrlimit ? */
  29 int
  30 setrlimit (resource, rlimits)
  31      enum __rlimit_resource resource;
  32      struct rlimit *rlimits;
  33 {
  34   struct rlimit lim;
  35
  36   if (rlimits == NULL || (unsigned int) resource >= RLIMIT_NLIMITS)
  37     {
  38       errno = EINVAL;
  39       return -1;
  40     }
  41
  42   lim = *rlimits;
  43
  44   if (lim.rlim_max != RLIM_INFINITY)
  45     {
  46       /* We have no enforceable resource limits.  */
  47       errno = ENOSYS;
  48       return -1;
  49     }
  50
  51   if (lim.rlim_cur > lim.rlim_max)
  52     lim.rlim_cur = lim.rlim_max;
  53
  54   __mutex_lock (&_hurd_rlimit_lock);
  55   _hurd_rlimits[resource] = lim;
  56   __mutex_unlock (&_hurd_rlimit_lock);
  57
  58   return 0;
  59 }