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 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