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 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#include <errno.h> 21#include <stdlib.h> 22 23#define OPENAT_BUFFER_SIZE 512 24char *openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file); 25 26/* Some systems don't have ENOSYS. */ 27#ifndef ENOSYS 28# ifdef ENOTSUP 29# define ENOSYS ENOTSUP 30# else 31/* Some systems don't have ENOTSUP either. */ 32# define ENOSYS EINVAL 33# endif 34#endif 35 36/* Some systems don't have EOPNOTSUPP. */ 37#ifndef EOPNOTSUPP 38# ifdef ENOTSUP 39# define EOPNOTSUPP ENOTSUP 40# else 41/* Some systems don't have ENOTSUP either. */ 42# define EOPNOTSUPP EINVAL 43# endif 44#endif 45 46/* Trying to access a BUILD_PROC_NAME file will fail on systems without 47 /proc support, and even on systems *with* ProcFS support. Return 48 nonzero if the failure may be legitimate, e.g., because /proc is not 49 readable, or the particular .../fd/N directory is not present. */ 50#define EXPECTED_ERRNO(Errno) \ 51 ((Errno) == ENOTDIR || (Errno) == ENOENT \ 52 || (Errno) == EPERM || (Errno) == EACCES \ 53 || (Errno) == ENOSYS /* Solaris 8 */ \ 54 || (Errno) == EOPNOTSUPP /* FreeBSD */) 55