1/* Internals for openat-like functions. 2 3 Copyright (C) 2005, 2006 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 2, or (at your option) 8 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, write to the Free Software Foundation, 17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 18 19/* written by Jim Meyering */ 20 21#include <errno.h> 22#include <stdlib.h> 23 24#define OPENAT_BUFFER_SIZE 512 25char *openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file); 26 27/* Some systems don't have ENOSYS. */ 28#ifndef ENOSYS 29# ifdef ENOTSUP 30# define ENOSYS ENOTSUP 31# else 32/* Some systems don't have ENOTSUP either. */ 33# define ENOSYS EINVAL 34# endif 35#endif 36 37/* Some systems don't have EOPNOTSUPP. */ 38#ifndef EOPNOTSUPP 39# ifdef ENOTSUP 40# define EOPNOTSUPP ENOTSUP 41# else 42/* Some systems don't have ENOTSUP either. */ 43# define EOPNOTSUPP EINVAL 44# endif 45#endif 46 47/* Trying to access a BUILD_PROC_NAME file will fail on systems without 48 /proc support, and even on systems *with* ProcFS support. Return 49 nonzero if the failure may be legitimate, e.g., because /proc is not 50 readable, or the particular .../fd/N directory is not present. */ 51#define EXPECTED_ERRNO(Errno) \ 52 ((Errno) == ENOTDIR || (Errno) == ENOENT \ 53 || (Errno) == EPERM || (Errno) == EACCES \ 54 || (Errno) == ENOSYS /* Solaris 8 */ \ 55 || (Errno) == EOPNOTSUPP /* FreeBSD */) 56