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/* Internals for openat-like functions.
Copyright (C) 2005, 2006 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 */
#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);
/* Some systems don't have ENOSYS. */
#ifndef ENOSYS
# ifdef ENOTSUP
# define ENOSYS ENOTSUP
# else
/* Some systems don't have ENOTSUP either. */
# define ENOSYS EINVAL
# endif
#endif
/* Some systems don't have EOPNOTSUPP. */
#ifndef EOPNOTSUPP
# ifdef ENOTSUP
# define EOPNOTSUPP ENOTSUP
# else
/* Some systems don't have ENOTSUP either. */
# define EOPNOTSUPP EINVAL
# endif
#endif
/* 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 */)
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