1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* 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.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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/sysctl.h>
#include <unistd.h>
/*
* Internal helper to grab a sysctl
* variable.
*
* @name: Name definition of sysctl variable
* @buf: Buffer to read data in
* @buflen: Length of buffer
*
* Returns zero on success, otherwise a less than
* zero value.
*/
static int
__sysctl_get(int name, char *buf, size_t buflen)
{
struct sysctl_args args;
int error;
args.name = &name;
args.nlen = 1;
args.oldp = buf;
args.oldlenp = &buflen;
args.newp = NULL;
args.newlen = 0;
if ((error = sysctl(&args)) != 0) {
return -1;
}
return 0;
}
/*
* Internal helper to set a sysctl
* variable.
*
* @name: Name definition of sysctl variable
* @buf: Buffer with data to set
* @buflen: Length of buffer
*
* Returns zero on success, otherwise a less than
* zero value.
*/
static int
__sysctl_set(int name, const char *buf, size_t buflen)
{
struct sysctl_args args;
int error;
args.name = &name;
args.nlen = 1;
args.oldp = NULL;
args.oldlenp = NULL;
args.newp = (void *)buf;
args.newlen = buflen;
if ((error = sysctl(&args)) != 0) {
return -1;
}
return 0;
}
/*
* Get the system hostname
*
* @name: Buffer to read name into
* @size: Length of name to read
*/
int
gethostname(char *name, size_t size)
{
if (name == NULL || size == 0) {
return -1;
}
return __sysctl_get(KERN_HOSTNAME, name, size);
}
/*
* Set the system hostname
*
* @name: Name to set
* @size: Size of name to set
*/
int
sethostname(const char *name, size_t size)
{
if (name == NULL || size == 0) {
return -1;
}
return __sysctl_set(KERN_HOSTNAME, name, size);
}
|
