sysdeps/unix/sysv/setrlimit.c

   1 /* setrlimit function for systems with ulimit system call (SYSV).
   2
   3 Copyright (C) 1991, 1992 Free Software Foundation, Inc.
   4 This file is part of the GNU C Library.
   5
   6 The GNU C Library is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU Library General Public License as
   8 published by the Free Software Foundation; either version 2 of the
   9 License, or (at your option) any later version.
  10
  11 The GNU C Library is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 Library General Public License for more details.
  15
  16 You should have received a copy of the GNU Library General Public
  17 License along with the GNU C Library; see the file COPYING.LIB.  If
  18 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  19 Cambridge, MA 02139, USA.  */
  20
  21 /* This only implements those functions which are available via ulimit.  */
  22
  23 #include <ansidecl.h>
  24 #include <sys/resource.h>
  25 #include <stddef.h>
  26 #include <errno.h>
  27
  28 /* Set the soft and hard limits for RESOURCE to *RLIMITS.
  29    Only the super-user can increase hard limits.
  30    Return 0 if successful, -1 if not (and sets errno).  */
  31 int
  32 DEFUN(setrlimit, (resource, rlimits),
  33       enum __rlimit_resource resource AND struct rlimit *rlimits)
  34 {
  35   if (rlimits == NULL)
  36     {
  37       errno = EINVAL;
  38       return -1;
  39     }
  40
  41   switch (resource)
  42     {
  43     case RLIMIT_FSIZE:
  44       return __ulimit(2, rlimits->rlim_cur);
  45
  46     case RLIMIT_DATA:
  47     case RLIMIT_CPU:
  48     case RLIMIT_STACK:
  49     case RLIMIT_CORE:
  50     case RLIMIT_RSS:
  51       errno = ENOSYS;
  52       return -1;
  53
  54     default:
  55       errno = EINVAL;
  56       return -1;
  57     }
  58 }