/* 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 2, 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* 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 */)