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b168057a | 1 | /* Copyright (C) 1992-2015 Free Software Foundation, Inc. |
ebbad4cc | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
ebbad4cc | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 8 | |
ebbad4cc UD |
9 | The GNU C Library 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 GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 17 | |
28f540f4 | 18 | #include <errno.h> |
750f9af6 | 19 | #include <string.h> |
28f540f4 RM |
20 | #include <unistd.h> |
21 | #include <sys/utsname.h> | |
22 | ||
23 | /* Put the name of the current host in no more than LEN bytes of NAME. | |
24 | The result is null-terminated if LEN is large enough for the full | |
25 | name and the terminator. */ | |
26 | int | |
bd2260a2 | 27 | __gethostname (char *name, size_t len) |
28f540f4 RM |
28 | { |
29 | struct utsname buf; | |
750f9af6 UD |
30 | size_t node_len; |
31 | ||
28f540f4 RM |
32 | if (uname (&buf)) |
33 | return -1; | |
750f9af6 UD |
34 | |
35 | node_len = strlen (buf.nodename) + 1; | |
b8f5d8dd RM |
36 | memcpy (name, buf.nodename, len < node_len ? len : node_len); |
37 | ||
750f9af6 UD |
38 | if (node_len > len) |
39 | { | |
40 | __set_errno (ENAMETOOLONG); | |
41 | return -1; | |
42 | } | |
28f540f4 RM |
43 | return 0; |
44 | } | |
45 | ||
46 | weak_alias (__gethostname, gethostname) |