hurd/hurdrlimit.c

   1 /* Resource limits.
   2    Copyright (C) 1994-2023 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 <hurd.h>
  20 #include <lock-intern.h>
  21 #include <hurd/resource.h>
  22 #include "set-hooks.h"
  23
  24 /* This must be given an initializer, or the a.out linking rules will
  25    not include the entire file when this symbol is referenced. */
  26 struct rlimit _hurd_rlimits[RLIM_NLIMITS] = { { 0, }, };
  27
  28 /* This must be initialized data for the same reason as above, but this is
  29    intentionally initialized to a bogus value to emphasize the point that
  30    mutex_init is still required below just in case of unexec.  */
  31 struct mutex _hurd_rlimit_lock = { SPIN_LOCK_INITIALIZER, };
  32
  33 static void attribute_used_retain
  34 init_rlimit (void)
  35 {
  36   int i;
  37
  38   __mutex_init (&_hurd_rlimit_lock);
  39
  40   for (i = 0; i < RLIM_NLIMITS; ++i)
  41     {
  42       if (_hurd_rlimits[i].rlim_max == 0)
  43         _hurd_rlimits[i].rlim_max = RLIM_INFINITY;
  44       if (_hurd_rlimits[i].rlim_cur == 0)
  45 #define I(lim, val) case RLIMIT_##lim: _hurd_rlimits[i].rlim_cur = (val); break
  46         switch (i)
  47           {
  48             I (NOFILE, 1024);   /* Linux 2.2.12 uses this initial value.  */
  49
  50           default:
  51             _hurd_rlimits[i].rlim_cur = _hurd_rlimits[i].rlim_max;
  52             break;
  53           }
  54 #undef  I
  55     }
  56 }
  57 SET_RELHOOK (_hurd_preinit_hook, init_rlimit);