| 1 | /* Internals for openat-like functions.
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| 2 |
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| 3 | Copyright (C) 2005, 2006 Free Software Foundation, Inc.
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| 4 |
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| 5 | This program is free software; you can redistribute it and/or modify
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| 6 | it under the terms of the GNU General Public License as published by
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| 7 | the Free Software Foundation; either version 2, or (at your option)
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| 8 | any later version.
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| 9 |
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| 10 | This program is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU General Public License
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| 16 | along with this program; if not, write to the Free Software Foundation,
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| 17 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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| 18 |
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| 19 | /* written by Jim Meyering */
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| 20 |
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| 21 | #include <errno.h>
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| 22 | #include <stdlib.h>
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| 23 |
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| 24 | #define OPENAT_BUFFER_SIZE 512
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| 25 | char *openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file);
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| 26 |
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| 27 | /* Some systems don't have ENOSYS. */
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| 28 | #ifndef ENOSYS
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| 29 | # ifdef ENOTSUP
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| 30 | # define ENOSYS ENOTSUP
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| 31 | # else
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| 32 | /* Some systems don't have ENOTSUP either. */
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| 33 | # define ENOSYS EINVAL
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| 34 | # endif
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| 35 | #endif
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| 36 |
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| 37 | /* Some systems don't have EOPNOTSUPP. */
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| 38 | #ifndef EOPNOTSUPP
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| 39 | # ifdef ENOTSUP
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| 40 | # define EOPNOTSUPP ENOTSUP
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| 41 | # else
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| 42 | /* Some systems don't have ENOTSUP either. */
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| 43 | # define EOPNOTSUPP EINVAL
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| 44 | # endif
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| 45 | #endif
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| 46 |
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| 47 | /* Trying to access a BUILD_PROC_NAME file will fail on systems without
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| 48 | /proc support, and even on systems *with* ProcFS support. Return
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| 49 | nonzero if the failure may be legitimate, e.g., because /proc is not
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| 50 | readable, or the particular .../fd/N directory is not present. */
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| 51 | #define EXPECTED_ERRNO(Errno) \
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| 52 | ((Errno) == ENOTDIR || (Errno) == ENOENT \
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| 53 | || (Errno) == EPERM || (Errno) == EACCES \
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| 54 | || (Errno) == ENOSYS /* Solaris 8 */ \
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| 55 | || (Errno) == EOPNOTSUPP /* FreeBSD */)
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