sysdeps/unix/sysv/linux/i386/getrlimit.c

   1 /* Copyright (C) 1999 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 <errno.h>
  20 #include <sys/resource.h>
  21
  22 #include <sysdep.h>
  23 #include <sys/syscall.h>
  24
  25 #include "../kernel-features.h"
  26
  27
  28 /* Linux 2.3.25 introduced a new system call since the types used for
  29    the limits are now unsigned.  */
  30 #if !defined __ASSUME_NEW_GETRLIMIT_SYSCALL && defined __NR_ugetrlimit
  31 static int no_new_getrlimit;
  32 #else
  33 # define no_new_getrlimit       0
  34 #endif
  35
  36 int
  37 __getrlimit (resource, rlimits)
  38      enum __rlimit_resource resource;
  39      struct rlimit *rlimits;
  40 {
  41 #ifdef __NR_ugetrlimit
  42   if (! no_new_getrlimit)
  43     {
  44       int result = INLINE_SYSCALL (ugetrlimit, 2, resource, rlimits);
  45
  46 # ifndef __ASSUME_NEW_GETRLIMIT_SYSCALL
  47       /* If the system call is available return.  */
  48       if (result != -1 || errno != ENOSYS)
  49 # endif
  50         return result;
  51
  52 # ifndef __ASSUME_NEW_GETRLIMIT_SYSCALL
  53       /* Remember that the system call is not available.  */
  54       no_new_getrlimit = 1;
  55 # endif
  56     }
  57 #endif
  58
  59 #ifndef __ASSUME_NEW_GETRLIMIT_SYSCALL
  60   /* Fall back on the old system call.  */
  61   return INLINE_SYSCALL (getrlimit, 2, resource, rlimits);
  62 #endif
  63 }
  64 weak_alias (__getrlimit, getrlimit)