mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-24 07:20:37 +00:00
46 lines
1.7 KiB
C
46 lines
1.7 KiB
C
/* Check the access rights of a file relative to an open directory.
|
|
Copyright (C) 2009-2013 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 Eric Blake */
|
|
|
|
#include <config.h>
|
|
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
|
|
#ifndef HAVE_ACCESS
|
|
/* Mingw lacks access, but it also lacks real vs. effective ids, so
|
|
the gnulib euidaccess module is good enough. */
|
|
# undef access
|
|
# define access euidaccess
|
|
#endif
|
|
|
|
/* Invoke access or euidaccess on file, FILE, using mode MODE, in the directory
|
|
open on descriptor FD. If possible, do it without changing the
|
|
working directory. Otherwise, resort to using save_cwd/fchdir, then
|
|
(access|euidaccess)/restore_cwd. If either the save_cwd or the
|
|
restore_cwd fails, then give a diagnostic and exit nonzero.
|
|
Note that this implementation only supports AT_EACCESS, although some
|
|
native versions also support AT_SYMLINK_NOFOLLOW. */
|
|
|
|
#define AT_FUNC_NAME faccessat
|
|
#define AT_FUNC_F1 euidaccess
|
|
#define AT_FUNC_F2 access
|
|
#define AT_FUNC_USE_F1_COND AT_EACCESS
|
|
#define AT_FUNC_POST_FILE_PARAM_DECLS , int mode, int flag
|
|
#define AT_FUNC_POST_FILE_ARGS , mode
|
|
#include "at-func.c"
|