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
|
/* Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Bruno Haible <bruno@clisp.org>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <unistd.h>
#include <sys/sysctl.h>
#include <errno.h>
/* Put the name of the current host in no more than LEN bytes of NAME.
The result is null-terminated if LEN is large enough for the full
name and the terminator. */
int
__gethostname (char *name, size_t len)
{
/* Fetch the "kern.hostname" sysctl value. */
int request[2] = { CTL_KERN, KERN_HOSTNAME };
size_t result_len = len;
if (__sysctl (request, 2, name, &result_len, NULL, 0) < 0)
{
if (errno == ENOMEM)
__set_errno (ENAMETOOLONG);
return -1;
}
if (result_len >= len)
{
__set_errno (ENAMETOOLONG);
return -1;
}
name[result_len] = '\0';
return 0;
}
weak_alias (__gethostname, gethostname)
|
