gethostname.c revision 233294 
1/*
2 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H��gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
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 *
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.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <config.h>
35#include "roken.h"
36
37#ifndef HAVE_GETHOSTNAME
38
39#ifdef HAVE_SYS_UTSNAME_H
40#include <sys/utsname.h>
41#endif
42
43/*
44 * Return the local host's name in "name", up to "namelen" characters.
45 * "name" will be null-terminated if "namelen" is big enough.
46 * The return code is 0 on success, -1 on failure.  (The calling
47 * interface is identical to gethostname(2).)
48 */
49
50ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
51gethostname(char *name, int namelen)
52{
53#if defined(HAVE_UNAME)
54    {
55	struct utsname utsname;
56	int ret;
57
58	ret = uname (&utsname);
59	if (ret < 0)
60	    return ret;
61	strlcpy (name, utsname.nodename, namelen);
62	return 0;
63    }
64#else
65    strlcpy (name, "some.random.host", namelen);
66    return 0;
67#endif
68}
69
70#endif /* GETHOSTNAME */
71