hurd/hurdrlimit.c

   1 /* Resource limits.
   2    Copyright (C) 1994-2021 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
  23 /* This must be given an initializer, or the a.out linking rules will
  24    not include the entire file when this symbol is referenced. */
  25 struct rlimit _hurd_rlimits[RLIM_NLIMITS] = { { 0, }, };
  26
  27 /* This must be initialized data for the same reason as above, but this is
  28    intentionally initialized to a bogus value to emphasize the point that
  29    mutex_init is still required below just in case of unexec.  */
  30 struct mutex _hurd_rlimit_lock = { SPIN_LOCK_INITIALIZER, };
  31
  32 static void
  33 init_rlimit (void)
  34 {
  35   int i;
  36
  37   __mutex_init (&_hurd_rlimit_lock);
  38
  39   for (i = 0; i < RLIM_NLIMITS; ++i)
  40     {
  41       if (_hurd_rlimits[i].rlim_max == 0)
  42         _hurd_rlimits[i].rlim_max = RLIM_INFINITY;
  43       if (_hurd_rlimits[i].rlim_cur == 0)
  44 #define I(lim, val) case RLIMIT_##lim: _hurd_rlimits[i].rlim_cur = (val); break
  45         switch (i)
  46           {
  47             I (NOFILE, 1024);   /* Linux 2.2.12 uses this initial value.  */
  48
  49           default:
  50             _hurd_rlimits[i].rlim_cur = _hurd_rlimits[i].rlim_max;
  51             break;
  52           }
  53 #undef  I
  54     }
  55
  56   (void) &init_rlimit;
  57 }
  58 text_set_element (_hurd_preinit_hook, init_rlimit);