1/* Internals for openat-like functions.
2
3   Copyright (C) 2005-2006, 2009-2010 Free Software Foundation, Inc.
4
5   This program is free software: you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18/* written by Jim Meyering */
19
20#ifndef _GL_HEADER_OPENAT_PRIV
21#define _GL_HEADER_OPENAT_PRIV
22
23#include <errno.h>
24#include <stdlib.h>
25
26#define OPENAT_BUFFER_SIZE 512
27char *openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file);
28
29/* Trying to access a BUILD_PROC_NAME file will fail on systems without
30   /proc support, and even on systems *with* ProcFS support.  Return
31   nonzero if the failure may be legitimate, e.g., because /proc is not
32   readable, or the particular .../fd/N directory is not present.  */
33#define EXPECTED_ERRNO(Errno)                   \
34  ((Errno) == ENOTDIR || (Errno) == ENOENT      \
35   || (Errno) == EPERM || (Errno) == EACCES     \
36   || (Errno) == ENOSYS /* Solaris 8 */         \
37   || (Errno) == EOPNOTSUPP /* FreeBSD */)
38
39/* Wrapper function shared among linkat and renameat.  */
40int at_func2 (int fd1, char const *file1,
41              int fd2, char const *file2,
42              int (*func) (char const *file1, char const *file2));
43
44#endif /* _GL_HEADER_OPENAT_PRIV */
45