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+/* Internals for openat-like functions.
+
+ Copyright (C) 2005-2006, 2009-2010 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* written by Jim Meyering */
+
+#ifndef _GL_HEADER_OPENAT_PRIV
+#define _GL_HEADER_OPENAT_PRIV
+
+#include <errno.h>
+#include <stdlib.h>
+
+#define OPENAT_BUFFER_SIZE 512
+char *openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file);
+
+/* Trying to access a BUILD_PROC_NAME file will fail on systems without
+ /proc support, and even on systems *with* ProcFS support. Return
+ nonzero if the failure may be legitimate, e.g., because /proc is not
+ readable, or the particular .../fd/N directory is not present. */
+#define EXPECTED_ERRNO(Errno) \
+ ((Errno) == ENOTDIR || (Errno) == ENOENT \
+ || (Errno) == EPERM || (Errno) == EACCES \
+ || (Errno) == ENOSYS /* Solaris 8 */ \
+ || (Errno) == EOPNOTSUPP /* FreeBSD */)
+
+/* Wrapper function shared among linkat and renameat. */
+int at_func2 (int fd1, char const *file1,
+ int fd2, char const *file2,
+ int (*func) (char const *file1, char const *file2));
+
+#endif /* _GL_HEADER_OPENAT_PRIV */