1 /* gethostname emulation for SysV and POSIX.1.
2 Copyright (C) 1992, 2003 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
17
18 /* David MacKenzie <djm@gnu.ai.mit.edu> */
19
20 #ifdef HAVE_CONFIG_H
21 # include <config.h>
22 #endif
23
24 #ifdef HAVE_UNAME
25 # include <sys/utsname.h>
26 #endif
27
28 /* Put up to LEN chars of the host name into NAME.
29 Null terminate it if the name is shorter than LEN.
30 Return 0 if ok, -1 if error. */
31
32 #include <stddef.h>
33
34 int
gethostname(char * name,size_t len)35 gethostname (char *name, size_t len)
36 {
37 #ifdef HAVE_UNAME
38 struct utsname uts;
39
40 if (uname (&uts) == -1)
41 return -1;
42 if (len > sizeof (uts.nodename))
43 {
44 /* More space than we need is available. */
45 name[sizeof (uts.nodename)] = '\0';
46 len = sizeof (uts.nodename);
47 }
48 strncpy (name, uts.nodename, len);
49 #else
50 strcpy (name, ""); /* Hardcode your system name if you want. */
51 #endif
52 return 0;
53 }
54