xref: /freebsd/crypto/heimdal/lib/roken/gethostname.c (revision d4eeb02986980bf33dd56c41ceb9fc5f180c0d47)
1 /*
2  * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
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 
50 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
51 gethostname(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