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glibc  2.9
setrlimit.c
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00001 /* setrlimit function for systems with ulimit system call (SYSV).
00002    Copyright (C) 1991, 1992, 1996, 1997, 1998 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 /* This only implements those functions which are available via ulimit.  */
00021 
00022 #include <sys/resource.h>
00023 #include <stddef.h>
00024 #include <errno.h>
00025 
00026 /* Set the soft and hard limits for RESOURCE to *RLIMITS.
00027    Only the super-user can increase hard limits.
00028    Return 0 if successful, -1 if not (and sets errno).  */
00029 int
00030 setrlimit (resource, rlimits)
00031      enum __rlimit_resource resource;
00032      const struct rlimit *rlimits;
00033 {
00034   if (rlimits == NULL)
00035     {
00036       __set_errno (EINVAL);
00037       return -1;
00038     }
00039 
00040   switch (resource)
00041     {
00042     case RLIMIT_FSIZE:
00043       return __ulimit (2, rlimits->rlim_cur);
00044 
00045     case RLIMIT_DATA:
00046     case RLIMIT_CPU:
00047     case RLIMIT_STACK:
00048     case RLIMIT_CORE:
00049     case RLIMIT_RSS:
00050       __set_errno (ENOSYS);
00051       return -1;
00052 
00053     default:
00054       __set_errno (EINVAL);
00055       return -1;
00056     }
00057 }