1 /* Copyright (C) 2001-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
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.
8
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
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library. If not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <errno.h>
19 #include <string.h>
20 #include <unistd.h>
21
22 #include <sysdep.h>
23 #include <sys/syscall.h>
24
25 int
__gethostname(char * name,size_t len)26 __gethostname (char *name, size_t len)
27 {
28 int result;
29
30 result = INLINE_SYSCALL (gethostname, 2, name, len);
31
32 if (result == 0
33 /* See whether the string is terminated. If not we will return
34 an error. */
35 && memchr (name, '\0', len) == NULL)
36 {
37 __set_errno (EOVERFLOW);
38 result = -1;
39 }
40
41 return result;
42 }
43
44 weak_alias (__gethostname, gethostname)
45