sysdeps/unix/sysv/setrlimit.c

/* setrlimit function for systems with ulimit system call (SYSV).

Copyright (C) 1991, 1992 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

/* This only implements those functions which are available via ulimit.  */

#include <ansidecl.h>
#include <sys/resource.h>
#include <stddef.h>
#include <errno.h>

/* Set the soft and hard limits for RESOURCE to *RLIMITS.
   Only the super-user can increase hard limits.
   Return 0 if successful, -1 if not (and sets errno).  */
int
DEFUN(setrlimit, (resource, rlimits),
      enum __rlimit_resource resource AND struct rlimit *rlimits)
{
  if (rlimits == NULL)
    {
      errno = EINVAL;
      return -1;
    }

  switch (resource)
    {
    case RLIMIT_FSIZE:
      return __ulimit(2, rlimits->rlim_cur);

    case RLIMIT_DATA:
    case RLIMIT_CPU:
    case RLIMIT_STACK:
    case RLIMIT_CORE:
    case RLIMIT_RSS:
      errno = ENOSYS;
      return -1;

    default:
      errno = EINVAL;
      return -1;
    }
}