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-rw-r--r--gnu/fchownat.c109
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diff --git a/gnu/fchownat.c b/gnu/fchownat.c
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--- a/gnu/fchownat.c
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-/* -*- buffer-read-only: t -*- vi: set ro: */
-/* DO NOT EDIT! GENERATED AUTOMATICALLY! */
-/* This function serves as replacement for a missing fchownat function,
- as well as a work around for the fchownat bug in glibc-2.4:
- <http://lists.ubuntu.com/archives/ubuntu-users/2006-September/093218.html>
- when the buggy fchownat-with-AT_SYMLINK_NOFOLLOW operates on a symlink, it
- mistakenly affects the symlink referent, rather than the symlink itself.
-
- Copyright (C) 2006-2007, 2009-2010 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 <config.h>
-
-#include <unistd.h>
-
-#include <errno.h>
-#include <string.h>
-
-#include "openat.h"
-
-#if !HAVE_FCHOWNAT
-
-/* Replacement for Solaris' function by the same name.
- Invoke chown or lchown on file, FILE, using OWNER and GROUP, in the
- directory open on descriptor FD. If FLAG is AT_SYMLINK_NOFOLLOW, then
- use lchown, otherwise, use chown. If possible, do it without changing
- the working directory. Otherwise, resort to using save_cwd/fchdir,
- then (chown|lchown)/restore_cwd. If either the save_cwd or the
- restore_cwd fails, then give a diagnostic and exit nonzero. */
-
-# define AT_FUNC_NAME fchownat
-# define AT_FUNC_F1 lchown
-# define AT_FUNC_F2 chown
-# define AT_FUNC_USE_F1_COND AT_SYMLINK_NOFOLLOW
-# define AT_FUNC_POST_FILE_PARAM_DECLS , uid_t owner, gid_t group, int flag
-# define AT_FUNC_POST_FILE_ARGS , owner, group
-# include "at-func.c"
-# undef AT_FUNC_NAME
-# undef AT_FUNC_F1
-# undef AT_FUNC_F2
-# undef AT_FUNC_USE_F1_COND
-# undef AT_FUNC_POST_FILE_PARAM_DECLS
-# undef AT_FUNC_POST_FILE_ARGS
-
-#else /* HAVE_FCHOWNAT */
-
-# undef fchownat
-
-# if FCHOWNAT_NOFOLLOW_BUG
-
-/* Failure to handle AT_SYMLINK_NOFOLLOW requires the /proc/self/fd or
- fchdir workaround to call lchown for lchownat, but there is no need
- to penalize chownat. */
-static int
-local_lchownat (int fd, char const *file, uid_t owner, gid_t group);
-
-# define AT_FUNC_NAME local_lchownat
-# define AT_FUNC_F1 lchown
-# define AT_FUNC_POST_FILE_PARAM_DECLS , uid_t owner, gid_t group
-# define AT_FUNC_POST_FILE_ARGS , owner, group
-# include "at-func.c"
-# undef AT_FUNC_NAME
-# undef AT_FUNC_F1
-# undef AT_FUNC_POST_FILE_PARAM_DECLS
-# undef AT_FUNC_POST_FILE_ARGS
-
-# endif
-
-/* Work around bugs with trailing slash, using the same workarounds as
- chown and lchown. */
-
-int
-rpl_fchownat (int fd, char const *file, uid_t owner, gid_t group, int flag)
-{
-# if FCHOWNAT_NOFOLLOW_BUG
- if (flag == AT_SYMLINK_NOFOLLOW)
- return local_lchownat (fd, file, owner, group);
-# endif
-# if CHOWN_TRAILING_SLASH_BUG
- {
- size_t len = strlen (file);
- struct stat st;
- if (len && file[len - 1] == '/')
- {
- if (statat (fd, file, &st))
- return -1;
- if (flag == AT_SYMLINK_NOFOLLOW)
- return fchownat (fd, file, owner, group, 0);
- }
- }
-# endif
- return fchownat (fd, file, owner, group, flag);
-}
-
-#endif /* HAVE_FCHOWNAT */