sysdeps/unix/sysv/linux/setrlimit.c

   1 /* Linux setrlimit implementation (32 bits off_t).
   2    Copyright (C) 2016-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/resource.h>
  20 #include <sysdep.h>
  21 #include <shlib-compat.h>
  22
  23 #if !__RLIM_T_MATCHES_RLIM64_T
  24
  25 /* The compatibility symbol is meant to match the old __NR_getrlimit syscall
  26    (with broken RLIM_INFINITY definition).  It should be provided iff
  27    __NR_getrlimit and __NR_ugetrlimit are both defined.  */
  28 # ifndef __NR_ugetrlimit
  29 #  undef SHLIB_COMPAT
  30 #  define SHLIB_COMPAT(a, b, c) 0
  31 # endif
  32
  33 int
  34 __setrlimit (enum __rlimit_resource resource, const struct rlimit *rlim)
  35 {
  36   struct rlimit64 rlim64;
  37
  38   if (rlim->rlim_cur == RLIM_INFINITY)
  39     rlim64.rlim_cur = RLIM64_INFINITY;
  40   else
  41     rlim64.rlim_cur = rlim->rlim_cur;
  42   if (rlim->rlim_max == RLIM_INFINITY)
  43     rlim64.rlim_max = RLIM64_INFINITY;
  44   else
  45     rlim64.rlim_max = rlim->rlim_max;
  46
  47   return INLINE_SYSCALL_CALL (prlimit64, 0, resource, &rlim64, NULL);
  48 }
  49
  50 libc_hidden_def (__setrlimit)
  51 # if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
  52 strong_alias (__setrlimit, __setrlimit_1)
  53 compat_symbol (libc, __setrlimit, setrlimit, GLIBC_2_0);
  54 versioned_symbol (libc, __setrlimit_1, setrlimit, GLIBC_2_2);
  55 # else
  56 weak_alias (__setrlimit, setrlimit)
  57 # endif
  58
  59 #endif /* __RLIM_T_MATCHES_RLIM64_T  */