ulimit.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2002 Kyle Martin <mkm@ieee.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: stable/11/lib/libc/gen/ulimit.c 330897 2018-03-14 03:19:51Z eadler $
29 */
30
31#include <sys/types.h>
32#include <sys/time.h>
33#include <sys/resource.h>
34
35#include <errno.h>
36#include <limits.h>
37#include <stdarg.h>
38#include <ulimit.h>
39
40long
41ulimit(int cmd, ...)
42{
43	struct rlimit limit;
44	va_list ap;
45	rlim_t arg;
46
47	if (cmd == UL_GETFSIZE) {
48		if (getrlimit(RLIMIT_FSIZE, &limit) == -1)
49			return (-1);
50		limit.rlim_cur /= 512;
51		if (limit.rlim_cur > LONG_MAX)
52			return (LONG_MAX);
53		return ((long)limit.rlim_cur);
54	} else if (cmd == UL_SETFSIZE) {
55		va_start(ap, cmd);
56		arg = va_arg(ap, long);
57		va_end(ap);
58		if (arg < 0)
59			arg = LONG_MAX;
60		if (arg > RLIM_INFINITY / 512)
61			arg = RLIM_INFINITY / 512;
62		limit.rlim_max = limit.rlim_cur = arg * 512;
63
64		/* The setrlimit() function sets errno to EPERM if needed. */
65		if (setrlimit(RLIMIT_FSIZE, &limit) == -1)
66			return (-1);
67		return ((long)arg);
68	} else {
69		errno = EINVAL;
70		return (-1);
71	}
72}
73