1*d7847a8dSBrooks Davis /*
2*d7847a8dSBrooks Davis * SPDX-License-Identifier: BSD-2-Clause
3*d7847a8dSBrooks Davis *
4*d7847a8dSBrooks Davis * Copyright (c) 2020 Kyle Evans <kevans@FreeBSD.org>
5*d7847a8dSBrooks Davis *
6*d7847a8dSBrooks Davis * Redistribution and use in source and binary forms, with or without
7*d7847a8dSBrooks Davis * modification, are permitted provided that the following conditions
8*d7847a8dSBrooks Davis * are met:
9*d7847a8dSBrooks Davis * 1. Redistributions of source code must retain the above copyright
10*d7847a8dSBrooks Davis * notice, this list of conditions and the following disclaimer.
11*d7847a8dSBrooks Davis * 2. Redistributions in binary form must reproduce the above copyright
12*d7847a8dSBrooks Davis * notice, this list of conditions and the following disclaimer in the
13*d7847a8dSBrooks Davis * documentation and/or other materials provided with the distribution.
14*d7847a8dSBrooks Davis *
15*d7847a8dSBrooks Davis * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
16*d7847a8dSBrooks Davis * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17*d7847a8dSBrooks Davis * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18*d7847a8dSBrooks Davis * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
19*d7847a8dSBrooks Davis * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20*d7847a8dSBrooks Davis * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21*d7847a8dSBrooks Davis * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
22*d7847a8dSBrooks Davis * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23*d7847a8dSBrooks Davis * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
24*d7847a8dSBrooks Davis * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
25*d7847a8dSBrooks Davis * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26*d7847a8dSBrooks Davis */
27*d7847a8dSBrooks Davis
28*d7847a8dSBrooks Davis #include <sys/param.h>
29*d7847a8dSBrooks Davis #include <sys/syscall.h>
30*d7847a8dSBrooks Davis #include <unistd.h>
31*d7847a8dSBrooks Davis
32*d7847a8dSBrooks Davis #include "libc_private.h"
33*d7847a8dSBrooks Davis
34*d7847a8dSBrooks Davis #define CLOSE_RANGE_OSREL 1300091
35*d7847a8dSBrooks Davis
36*d7847a8dSBrooks Davis void
closefrom(int lowfd)37*d7847a8dSBrooks Davis closefrom(int lowfd)
38*d7847a8dSBrooks Davis {
39*d7847a8dSBrooks Davis
40*d7847a8dSBrooks Davis if (__getosreldate() >= CLOSE_RANGE_OSREL)
41*d7847a8dSBrooks Davis __sys_close_range(MAX(0, lowfd), ~0U, 0);
42*d7847a8dSBrooks Davis else
43*d7847a8dSBrooks Davis /* Fallback to closefrom(2) on older kernels. */
44*d7847a8dSBrooks Davis syscall(SYS_freebsd12_closefrom, lowfd);
45*d7847a8dSBrooks Davis }
46