xref: /freebsd/lib/libc/gen/ulimit.c (revision 63d1fd5970ec814904aa0f4580b10a0d302d08b2)
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  * $FreeBSD$
27  */
28 
29 #include <sys/types.h>
30 #include <sys/time.h>
31 #include <sys/resource.h>
32 
33 #include <errno.h>
34 #include <limits.h>
35 #include <stdarg.h>
36 #include <ulimit.h>
37 
38 long
39 ulimit(int cmd, ...)
40 {
41 	struct rlimit limit;
42 	va_list ap;
43 	rlim_t arg;
44 
45 	if (cmd == UL_GETFSIZE) {
46 		if (getrlimit(RLIMIT_FSIZE, &limit) == -1)
47 			return (-1);
48 		limit.rlim_cur /= 512;
49 		if (limit.rlim_cur > LONG_MAX)
50 			return (LONG_MAX);
51 		return ((long)limit.rlim_cur);
52 	} else if (cmd == UL_SETFSIZE) {
53 		va_start(ap, cmd);
54 		arg = va_arg(ap, long);
55 		va_end(ap);
56 		if (arg < 0)
57 			arg = LONG_MAX;
58 		if (arg > RLIM_INFINITY / 512)
59 			arg = RLIM_INFINITY / 512;
60 		limit.rlim_max = limit.rlim_cur = arg * 512;
61 
62 		/* The setrlimit() function sets errno to EPERM if needed. */
63 		if (setrlimit(RLIMIT_FSIZE, &limit) == -1)
64 			return (-1);
65 		return ((long)arg);
66 	} else {
67 		errno = EINVAL;
68 		return (-1);
69 	}
70 }
71