/* 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; }