1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
/* 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 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 <config.h>
#include "openat.h"
#include <unistd.h>
#include "dirname.h" /* solely for definition of IS_ABSOLUTE_FILE_NAME */
#include "lchown.h"
#include "save-cwd.h"
#include "openat-priv.h"
/* 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 mkdir/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 flag == 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"
|
