sysdeps/unix/sysv/setrlimit.c

   1 /* setrlimit function for systems with ulimit system call (SYSV).
   2    Copyright (C) 1991, 1992, 1996, 1997, 1998 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 /* This only implements those functions which are available via ulimit.  */
  21
  22 #include <sys/resource.h>
  23 #include <stddef.h>
  24 #include <errno.h>
  25
  26 /* Set the soft and hard limits for RESOURCE to *RLIMITS.
  27    Only the super-user can increase hard limits.
  28    Return 0 if successful, -1 if not (and sets errno).  */
  29 int
  30 setrlimit (resource, rlimits)
  31      enum __rlimit_resource resource;
  32      const struct rlimit *rlimits;
  33 {
  34   if (rlimits == NULL)
  35     {
  36       __set_errno (EINVAL);
  37       return -1;
  38     }
  39
  40   switch (resource)
  41     {
  42     case RLIMIT_FSIZE:
  43       return __ulimit (2, rlimits->rlim_cur);
  44
  45     case RLIMIT_DATA:
  46     case RLIMIT_CPU:
  47     case RLIMIT_STACK:
  48     case RLIMIT_CORE:
  49     case RLIMIT_RSS:
  50       __set_errno (ENOSYS);
  51       return -1;
  52
  53     default:
  54       __set_errno (EINVAL);
  55       return -1;
  56     }
  57 }