1 /* Copyright (C) 2005-2022 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 <fcntl.h>
20 #include <stddef.h>
21 #include <unistd.h>
22
23
24 /* Make a link to FROM relative to FROMFD called TO relative to TOFD. */
25 int
linkat(int fromfd,const char * from,int tofd,const char * to,int flags)26 linkat (int fromfd, const char *from, int tofd, const char *to, int flags)
27 {
28 if (from == NULL || to == NULL)
29 {
30 __set_errno (EINVAL);
31 return -1;
32 }
33
34 if ((tofd != AT_FDCWD && tofd < 0 && *to != '/')
35 || (fromfd != AT_FDCWD && fromfd < 0 && *from != '/'))
36 {
37 __set_errno (EBADF);
38 return -1;
39 }
40
41 __set_errno (ENOSYS);
42 return -1;
43 }
44 stub_warning (linkat)
45