| /* Copyright (C) 1991,1992,1994-1998,2001,2005 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 Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <errno.h> |
| #include <stdarg.h> |
| #include <sysdep.h> |
| #include <ulimit.h> |
| #include <unistd.h> |
| #include <sys/resource.h> |
| |
| |
| extern int _etext; |
| |
| /* Function depends on CMD: |
| 1 = Return the limit on the size of a file, in units of 512 bytes. |
| 2 = Set the limit on the size of a file to NEWLIMIT. Only the |
| super-user can increase the limit. |
| 3 = Return the maximum possible address of the data segment. |
| 4 = Return the maximum number of files that the calling process |
| can open. |
| Returns -1 on errors. */ |
| long int |
| ulimit (int cmd, ...) |
| { |
| struct rlimit limit; |
| va_list va; |
| long int result = -1; |
| |
| va_start (va, cmd); |
| |
| switch (cmd) |
| { |
| case UL_GETFSIZE: |
| /* Get limit on file size. */ |
| if (getrlimit (RLIMIT_FSIZE, &limit) == 0) |
| /* Convert from bytes to 512 byte units. */ |
| result = limit.rlim_cur / 512; |
| break; |
| |
| case UL_SETFSIZE: |
| /* Set limit on file size. */ |
| { |
| long int newlimit = va_arg (va, long int); |
| |
| if ((rlim_t) newlimit > RLIM_INFINITY / 512) |
| { |
| limit.rlim_cur = RLIM_INFINITY; |
| limit.rlim_max = RLIM_INFINITY; |
| } |
| else |
| { |
| limit.rlim_cur = newlimit * 512; |
| limit.rlim_max = newlimit * 512; |
| } |
| |
| result = setrlimit (RLIMIT_FSIZE, &limit); |
| } |
| break; |
| |
| case __UL_GETMAXBRK: |
| /* Get maximum address for `brk'. */ |
| if (getrlimit (RLIMIT_DATA, &limit) == 0) |
| result = ((long int) &_etext) + limit.rlim_cur; |
| break; |
| |
| case __UL_GETOPENMAX: |
| result = sysconf (_SC_OPEN_MAX); |
| break; |
| |
| default: |
| __set_errno (EINVAL); |
| } |
| |
| va_end (va); |
| |
| return result; |
| } |