2 * Copyright (c) 2013 The FreeBSD Foundation
5 * This software was developed by Pawel Jakub Dawidek under sponsorship from
6 * the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
38 #include "libcapsicum.h"
39 #include "libcapsicum_sysctl.h"
42 cap_sysctlbyname(cap_channel_t *chan, const char *name, void *oldp,
43 size_t *oldlenp, const void *newp, size_t newlen)
46 const uint8_t *retoldp;
52 operation |= CAP_SYSCTL_READ;
54 operation |= CAP_SYSCTL_WRITE;
56 nvl = nvlist_create(0);
57 nvlist_add_string(nvl, "cmd", "sysctl");
58 nvlist_add_string(nvl, "name", name);
59 nvlist_add_number(nvl, "operation", (uint64_t)operation);
60 if (oldp == NULL && oldlenp != NULL)
61 nvlist_add_null(nvl, "justsize");
62 else if (oldlenp != NULL)
63 nvlist_add_number(nvl, "oldlen", (uint64_t)*oldlenp);
65 nvlist_add_binary(nvl, "newp", newp, newlen);
66 nvl = cap_xfer_nvlist(chan, nvl);
69 if (nvlist_get_number(nvl, "error") != 0) {
70 errno = (int)nvlist_get_number(nvl, "error");
75 if (oldp == NULL && oldlenp != NULL) {
76 *oldlenp = (size_t)nvlist_get_number(nvl, "oldlen");
77 } else if (oldp != NULL) {
78 retoldp = nvlist_get_binary(nvl, "oldp", &oldlen);
79 memcpy(oldp, retoldp, oldlen);