lib/libc/gen/ulimit.c

   1 /*-
   2  * Copyright (c) 2002 Kyle Martin <mkm@ieee.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/lib/libc/gen/ulimit.c,v 1.3 2003/01/04 01:11:49 tjr Exp $
  27  * $DragonFly: src/lib/libc/gen/ulimit.c,v 1.1 2004/06/06 13:32:27 hmp Exp $
  28  */
  29
  30 #include <sys/types.h>
  31 #include <sys/time.h>
  32 #include <sys/resource.h>
  33
  34 #include <errno.h>
  35 #include <limits.h>
  36 #include <stdarg.h>
  37 #include <ulimit.h>
  38
  39 long
  40 ulimit(int cmd, ...)
  41 {
  42         struct rlimit limit;
  43         va_list ap;
  44         long arg;
  45
  46         if (cmd == UL_GETFSIZE) {
  47                 if (getrlimit(RLIMIT_FSIZE, &limit) == -1)
  48                         return (-1);
  49                 limit.rlim_cur /= 512;
  50                 if (limit.rlim_cur > LONG_MAX)
  51                         return (LONG_MAX);
  52                 return ((long)limit.rlim_cur);
  53         } else if (cmd == UL_SETFSIZE) {
  54                 va_start(ap, cmd);
  55                 arg = va_arg(ap, long);
  56                 va_end(ap);
  57                 limit.rlim_max = limit.rlim_cur = (rlim_t)arg * 512;
  58
  59                 /* The setrlimit() function sets errno to EPERM if needed. */
  60                 if (setrlimit(RLIMIT_FSIZE, &limit) == -1)
  61                         return (-1);
  62                 if (arg * 512 > LONG_MAX)
  63                         return (LONG_MAX);
  64                 return (arg);
  65         } else {
  66                 errno = EINVAL;
  67                 return (-1);
  68         }
  69 }