1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright 2019 Pawel Biernacki, Mysterious Code Ltd. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 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 ANY 17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * 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 29 #include <sys/param.h> 30 #include <sys/sysctl.h> 31 #include <string.h> 32 33 extern int __sysctlbyname(const char *name, size_t namelen, void *oldp, 34 size_t *oldlenp, const void *newp, size_t newlen); 35 36 int 37 sysctlbyname(const char *name, void *oldp, size_t *oldlenp, 38 const void *newp, size_t newlen) 39 { 40 size_t len; 41 int oid[2]; 42 43 if (__predict_true(strncmp(name, "user.", 5) != 0)) { 44 len = strlen(name); 45 return (__sysctlbyname(name, len, oldp, oldlenp, newp, 46 newlen)); 47 } else { 48 len = nitems(oid); 49 if (sysctlnametomib(name, oid, &len) == -1) 50 return (-1); 51 return (sysctl(oid, (u_int)len, oldp, oldlenp, newp, 52 newlen)); 53 } 54 } 55