sysdeps/unix/sysv/linux/getrlimit64.c

   1 /* Copyright (C) 2010-2014 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <sys/resource.h>
  20 #include <sys/types.h>
  21 #include <sysdep.h>
  22 #include <kernel-features.h>
  23
  24 /* Put the soft and hard limits for RESOURCE in *RLIMITS.
  25    Returns 0 if successful, -1 if not (and sets errno).  */
  26 int
  27 getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits)
  28 {
  29 #ifdef __ASSUME_PRLIMIT64
  30   return INLINE_SYSCALL (prlimit64, 4, 0, resource, NULL, rlimits);
  31 #else
  32 # ifdef __NR_prlimit64
  33   int res = INLINE_SYSCALL (prlimit64, 4, 0, resource, NULL, rlimits);
  34   if (res == 0 || errno != ENOSYS)
  35     return res;
  36 # endif
  37   struct rlimit rlimits32;
  38
  39   if (__getrlimit (resource, &rlimits32) < 0)
  40     return -1;
  41
  42   if (rlimits32.rlim_cur == RLIM_INFINITY)
  43     rlimits->rlim_cur = RLIM64_INFINITY;
  44   else
  45     rlimits->rlim_cur = rlimits32.rlim_cur;
  46   if (rlimits32.rlim_max == RLIM_INFINITY)
  47     rlimits->rlim_max = RLIM64_INFINITY;
  48   else
  49     rlimits->rlim_max = rlimits32.rlim_max;
  50
  51   return 0;
  52 #endif
  53 }
  54 libc_hidden_def (getrlimit64)