sysdeps/unix/get_child_max.c

   1 /* Get POSIX {CHILD_MAX} run-time limit value.  Unix version.
   2    Copyright (C) 2006-2016 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <limits.h>
  20 #include <sys/sysinfo.h>
  21 #include <sys/resource.h>
  22
  23 #ifndef CHILD_MAX
  24 long int
  25 __get_child_max (void)
  26 {
  27 # ifdef RLIMIT_NPROC
  28   struct rlimit limit;
  29   if (__getrlimit (RLIMIT_NPROC, &limit) == 0
  30       && limit.rlim_cur != RLIM_INFINITY)
  31     return limit.rlim_cur;
  32 # endif
  33
  34   return -1;
  35 }
  36 #endif