diff options
Diffstat (limited to 'lib/libc/gen/sysctlbyname.c')
-rw-r--r-- | lib/libc/gen/sysctlbyname.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/lib/libc/gen/sysctlbyname.c b/lib/libc/gen/sysctlbyname.c new file mode 100644 index 000000000000..8cc9599f7a95 --- /dev/null +++ b/lib/libc/gen/sysctlbyname.c @@ -0,0 +1,54 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright 2019 Pawel Biernacki, Mysterious Code Ltd. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/param.h> +#include <sys/sysctl.h> +#include <string.h> + +extern int __sysctlbyname(const char *name, size_t namelen, void *oldp, + size_t *oldlenp, const void *newp, size_t newlen); + +int +sysctlbyname(const char *name, void *oldp, size_t *oldlenp, + const void *newp, size_t newlen) +{ + size_t len; + int oid[2]; + + if (__predict_true(strncmp(name, "user.", 5) != 0)) { + len = strlen(name); + return (__sysctlbyname(name, len, oldp, oldlenp, newp, + newlen)); + } else { + len = nitems(oid); + if (sysctlnametomib(name, oid, &len) == -1) + return (-1); + return (sysctl(oid, (u_int)len, oldp, oldlenp, newp, + newlen)); + } +} |