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glibc  2.9
vlimit.c
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00001 /* Copyright (C) 1991, 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 /* This is generic in the sense that it will work with the BSD, SYSV,
00020    or stub versions of getrlimit.  Separate versions could be written
00021    for efficiency, but it's probably not worth it.  */
00022 
00023 #include <sys/vlimit.h>
00024 #include <sys/resource.h>
00025 #include <errno.h>
00026 
00027 /* Set the soft limit for RESOURCE to be VALUE.
00028    Returns 0 for success, -1 for failure.  */
00029 int
00030 vlimit (resource, value)
00031      enum __vlimit_resource resource;
00032      int value;
00033 {
00034   if (resource >= LIM_CPU && resource <= LIM_MAXRSS)
00035     {
00036       /* The rlimit codes happen to each be one less
00037         than the corresponding vlimit codes.  */
00038       enum __rlimit_resource rlimit_res =
00039        (enum __rlimit_resource) ((int) resource - 1);
00040       struct rlimit lims;
00041 
00042       if (__getrlimit (rlimit_res, &lims) < 0)
00043        return -1;
00044 
00045       lims.rlim_cur = value;
00046       return __setrlimit (rlimit_res, &lims);
00047     }
00048 
00049   __set_errno (EINVAL);
00050   return -1;
00051 }