Back to index

glibc  2.9
setrlimit.c
Go to the documentation of this file.
00001 /* Copyright (C) 1991,92,93,94,97,98,2000,01 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 
00021 #include <hurd.h>
00022 #include <hurd/fd.h>
00023 #include <hurd/resource.h>
00024 
00025 /* Set the soft and hard limits for RESOURCE to *RLIMITS.
00026    Only the super-user can increase hard limits.
00027    Return 0 if successful, -1 if not (and sets errno).  */
00028 int
00029 __setrlimit (enum __rlimit_resource resource, const struct rlimit *rlimits)
00030 {
00031   struct rlimit lim;
00032 
00033   if (rlimits == NULL || (unsigned int) resource >= RLIMIT_NLIMITS)
00034     {
00035       errno = EINVAL;
00036       return -1;
00037     }
00038 
00039   lim = *rlimits;
00040 
00041   /* Even though most limits do nothing, there is no inheritance, and hard
00042      limits are not really hard, we just let any old call succeed to make
00043      life easier for programs that expect normal behavior.  */
00044 
00045   if (lim.rlim_cur > lim.rlim_max)
00046     lim.rlim_cur = lim.rlim_max;
00047 
00048   HURD_CRITICAL_BEGIN;
00049   __mutex_lock (&_hurd_rlimit_lock);
00050   _hurd_rlimits[resource] = lim;
00051   __mutex_unlock (&_hurd_rlimit_lock);
00052   HURD_CRITICAL_END;
00053 
00054   return 0;
00055 }
00056 
00057 weak_alias (__setrlimit, setrlimit)